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2014-07-06iscsi-target: Explicily clear login response PDU in exception pathNicholas Bellinger1-0/+2
commit 683497566d48f86e04d026de1ee658dd74fc1077 upstream. This patch adds a explicit memset to the login response PDU exception path in iscsit_tx_login_rsp(). This addresses a regression bug introduced in commit baa4d64b where the initiator would end up not receiving the login response and associated status class + detail, before closing the login connection. Reported-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> Tested-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-06iscsi-target: Avoid rejecting incorrect ITT for Data-OutNicholas Bellinger1-1/+1
commit 97c99b47ac58bacb7c09e1f47d5d184434f6b06a upstream. This patch changes iscsit_check_dataout_hdr() to dump the incoming Data-Out payload when the received ITT is not associated with a WRITE, instead of calling iscsit_reject_cmd() for the non WRITE ITT descriptor. This addresses a bug where an initiator sending an Data-Out for an ITT associated with a READ would end up generating a reject for the READ, eventually resulting in list corruption. Reported-by: Santosh Kulkarni <santosh.kulkarni@calsoftinc.com> Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-06target: Fix left-over se_lun->lun_sep pointer OOPsNicholas Bellinger1-0/+1
commit 83ff42fcce070801a3aa1cd6a3269d7426271a8d upstream. This patch fixes a left-over se_lun->lun_sep pointer OOPs when one of the /sys/kernel/config/target/$FABRIC/$WWPN/$TPGT/lun/$LUN/alua* attributes is accessed after the $DEVICE symlink has been removed. To address this bug, go ahead and clear se_lun->lun_sep memory in core_dev_unexport(), so that the existing checks for show/store ALUA attributes in target_core_fabric_configfs.c work as expected. Reported-by: Sebastian Herbszt <herbszt@gmx.de> Tested-by: Sebastian Herbszt <herbszt@gmx.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30iscsi-target: Re-add chunk from backport of upstream 79d59d08082d to 3.10Roland Dreier1-6/+1
Commit d5c55fa31a29, the backport of upstream 79d59d08082d ("iscsi-target: Fix wrong buffer / buffer overrun in iscsi_change_param_value()") left out applying one chunk of the fix in iscsi_login_non_zero_tsih_s2(). Add the missing chunk. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30target: Explicitly clear ramdisk_mcp backend pagesNicholas A. Bellinger1-1/+1
[Note that a different patch to address the same issue went in during v3.15-rc1 (commit 4442dc8a), but includes a bunch of other changes that don't strictly apply to fixing the bug] This patch changes rd_allocate_sgl_table() to explicitly clear ramdisk_mcp backend memory pages by passing __GFP_ZERO into alloc_pages(). This addresses a potential security issue where reading from a ramdisk_mcp could return sensitive information, and follows what >= v3.15 does to explicitly clear ramdisk_mcp memory at backend device initialization time. Reported-by: Jorge Daniel Sequeira Matias <jdsm@tecnico.ulisboa.pt> Cc: Jorge Daniel Sequeira Matias <jdsm@tecnico.ulisboa.pt> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30target: Report correct response length for some commandsRoland Dreier3-5/+25
commit 2426bd456a61407388b6e61fc5f98dbcbebc50e2 upstream. When an initiator sends an allocation length bigger than what its command consumes, the target should only return the actual response data and set the residual length to the unused part of the allocation length. Add a helper function that command handlers (INQUIRY, READ CAPACITY, etc) can use to do this correctly, and use this code to get the correct residual for commands that don't use the full initiator allocation in the handlers for READ CAPACITY, READ CAPACITY(16), INQUIRY, MODE SENSE and REPORT LUNS. This addresses a handful of failures as reported by Christophe with the Windows Certification Kit: http://permalink.gmane.org/gmane.linux.scsi.target.devel/6515 Signed-off-by: Roland Dreier <roland@purestorage.com> Tested-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30iscsi-target: Fix ABORT_TASK + connection reset iscsi_queue_req memory leakNicholas Bellinger1-2/+1
commit bbc050488525e1ab1194c27355f63c66814385b8 upstream. This patch fixes a iscsi_queue_req memory leak when ABORT_TASK response has been queued by TFO->queue_tm_rsp() -> lio_queue_tm_rsp() after a long standing I/O completes, but the connection has already reset and waiting for cleanup to complete in iscsit_release_commands_from_conn() -> transport_generic_free_cmd() -> transport_wait_for_tasks() code. It moves iscsit_free_queue_reqs_for_conn() after the per-connection command list has been released, so that the associated se_cmd tag can be completed + released by target-core before freeing any remaining iscsi_queue_req memory for the connection generated by lio_queue_tm_rsp(). Cc: Thomas Glanzmann <thomas@glanzmann.de> Cc: Charalampos Pournaris <charpour@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30target: Use complete_all for se_cmd->t_transport_stop_compNicholas Bellinger1-3/+3
commit a95d6511303b848da45ee27b35018bb58087bdc6 upstream. This patch fixes a bug where multiple waiters on ->t_transport_stop_comp occurs due to a concurrent ABORT_TASK and session reset both invoking transport_wait_for_tasks(), while waiting for the associated se_cmd descriptor backend processing to complete. For this case, complete_all() should be invoked in order to wake up both waiters in core_tmr_abort_task() + transport_generic_free_cmd() process contexts. Cc: Thomas Glanzmann <thomas@glanzmann.de> Cc: Charalampos Pournaris <charpour@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30target: Set CMD_T_ACTIVE bit for Task Management RequestsNicholas Bellinger1-0/+6
commit f15e9cd910c4d9da7de43f2181f362082fc45f0f upstream. This patch fixes a bug where se_cmd descriptors associated with a Task Management Request (TMR) where not setting CMD_T_ACTIVE before being dispatched into target_tmr_work() process context. This is required in order for transport_generic_free_cmd() -> transport_wait_for_tasks() to wait on se_cmd->t_transport_stop_comp if a session reset event occurs while an ABORT_TASK is outstanding waiting for another I/O to complete. Cc: Thomas Glanzmann <thomas@glanzmann.de> Cc: Charalampos Pournaris <charpour@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-26iscsi-target: Reject mutual authentication with reflected CHAP_CNicholas Bellinger1-0/+10
commit 1d2b60a5545942b1376cb48c1d55843d71e3a08f upstream. This patch adds an explicit check in chap_server_compute_md5() to ensure the CHAP_C value received from the initiator during mutual authentication does not match the original CHAP_C provided by the target. This is in line with RFC-3720, section 8.2.1: Originators MUST NOT reuse the CHAP challenge sent by the Responder for the other direction of a bidirectional authentication. Responders MUST check for this condition and close the iSCSI TCP connection if it occurs. Reported-by: Tejas Vaykole <tejas.vaykole@calsoftinc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-16target: Fix alua_access_state attribute OOPs for un-configured devicesNicholas Bellinger1-0/+5
commit f1453773514bb8b0bba0716301e8c8f17f8d39c7 upstream. This patch fixes a OOPs where an attempt to write to the per-device alua_access_state configfs attribute at: /sys/kernel/config/target/core/$HBA/$DEV/alua/$TG_PT_GP/alua_access_state results in an NULL pointer dereference when the backend device has not yet been configured. This patch adds an explicit check for DF_CONFIGURED, and fails with -ENODEV to avoid this case. Reported-by: Chris Boot <crb@tiger-computing.co.uk> Reported-by: Philip Gaw <pgaw@darktech.org.uk> Cc: Chris Boot <crb@tiger-computing.co.uk> Cc: Philip Gaw <pgaw@darktech.org.uk> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-16target: Allow READ_CAPACITY opcode in ALUA Standby access stateNicholas Bellinger1-0/+9
commit e7810c2d2c37fa8e58dda74b00790dab60fe6fba upstream. This patch allows READ_CAPACITY + SAI_READ_CAPACITY_16 opcode processing to occur while the associated ALUA group is in Standby access state. This is required to avoid host side LUN probe failures during the initial scan if an ALUA group has already implicitly changed into Standby access state. This addresses a bug reported by Chris + Philip using dm-multipath + ESX hosts configured with ALUA multipath. (Drop v3.15 specific set_ascq usage - nab) Reported-by: Chris Boot <crb@tiger-computing.co.uk> Reported-by: Philip Gaw <pgaw@darktech.org.uk> Cc: Chris Boot <crb@tiger-computing.co.uk> Cc: Philip Gaw <pgaw@darktech.org.uk> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-16iscsi-target: Fix wrong buffer / buffer overrun in iscsi_change_param_value()Roland Dreier1-23/+27
commit 79d59d08082dd0a0a18f8ceb78c99f9f321d72aa upstream. In non-leading connection login, iscsi_login_non_zero_tsih_s1() calls iscsi_change_param_value() with the buffer it uses to hold the login PDU, not a temporary buffer. This leads to the login header getting corrupted and login failing for non-leading connections in MC/S. Fix this by adding a wrapper iscsi_change_param_sprintf() that handles the temporary buffer itself to avoid confusion. Also handle sending a reject in case of failure in the wrapper, which lets the calling code get quite a bit smaller and easier to read. Finally, bump the size of the temporary buffer from 32 to 64 bytes to be safe, since "MaxRecvDataSegmentLength=" by itself is 25 bytes; with a trailing NUL, a value >= 1M will lead to a buffer overrun. (This isn't the default but we don't need to run right at the ragged edge here) (Fix up context changes for v3.10.y - nab) Reported-by: Santosh Kulkarni <santosh.kulkarni@calsoftinc.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-16iser-target: Fix multi network portal shutdown regressionNicholas Bellinger2-4/+7
commit 2363d196686e44c0158929e7cf96c8589a24a81b upstream. This patch fixes a iser-target specific regression introduced in v3.15-rc6 with: commit 14f4b54fe38f3a8f8392a50b951c8aa43b63687a Author: Sagi Grimberg <sagig@mellanox.com> Date: Tue Apr 29 13:13:47 2014 +0300 Target/iscsi,iser: Avoid accepting transport connections during stop stage where the change to set iscsi_np->enabled = false within iscsit_clear_tpg_np_login_thread() meant that a iscsi_np with two iscsi_tpg_np exports would have it's parent iscsi_np set to a disabled state, even if other iscsi_tpg_np exports still existed. This patch changes iscsit_clear_tpg_np_login_thread() to only set iscsi_np->enabled = false when shutdown = true, and also changes iscsit_del_np() to set iscsi_np->enabled = true when iscsi_np->np_exports is non zero. (Fix up context changes for v3.10.y - nab) Cc: Sagi Grimberg <sagig@dev.mellanox.co.il> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-16Target/iscsi,iser: Avoid accepting transport connections during stop stageSagi Grimberg3-0/+3
commit 14f4b54fe38f3a8f8392a50b951c8aa43b63687a upstream. When the target is in stop stage, iSER transport initiates RDMA disconnects. The iSER initiator may wish to establish a new connection over the still existing network portal. In this case iSER transport should not accept and resume new RDMA connections. In order to learn that, iscsi_np is added with enabled flag so the iSER transport can check when deciding weather to accept and resume a new connection request. The iscsi_np is enabled after successful transport setup, and disabled before iscsi_np login threads are cleaned up. (Fix up context changes for v3.10.y - nab) Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-07target: Don't allow setting WC emulation if device doesn't supportAndy Grover1-4/+4
commit 07b8dae38b09bcfede7e726f172e39b5ce8390d9 upstream. Just like for pSCSI, if the transport sets get_write_cache, then it is not valid to enable write cache emulation for it. Return an error. see https://bugzilla.redhat.com/show_bug.cgi?id=1082675 Reviewed-by: Chris Leech <cleech@redhat.com> Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-06target/tcm_fc: Fix use-after-free of ft_tpgAndy Grover1-0/+1
commit 2c42be2dd4f6586728dba5c4e197afd5cfaded78 upstream. ft_del_tpg checks tpg->tport is set before unlinking the tpg from the tport when the tpg is being removed. Set this pointer in ft_tport_create, or the unlinking won't happen in ft_del_tpg and tport->tpg will reference a deleted object. This patch sets tpg->tport in ft_tport_create, because that's what ft_del_tpg checks, and is the only way to get back to the tport to clear tport->tpg. The bug was occuring when: - lport created, tport (our per-lport, per-provider context) is allocated. tport->tpg = NULL - tpg created - a PRLI is received. ft_tport_create is called, tpg is found and tport->tpg is set - tpg removed. ft_tpg is freed in ft_del_tpg. Since tpg->tport was not set, tport->tpg is not cleared and points at freed memory - Future calls to ft_tport_create return tport via first conditional, instead of searching for new tpg by calling ft_lport_find_tpg. tport->tpg is still invalid, and will access freed memory. see https://bugzilla.redhat.com/show_bug.cgi?id=1071340 Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-06iscsi-target: Fix ERL=2 ASYNC_EVENT connection pointer bugNicholas Bellinger1-1/+3
commit d444edc679e7713412f243b792b1f964e5cff1e1 upstream. This patch fixes a long-standing bug in iscsit_build_conn_drop_async_message() where during ERL=2 connection recovery, a bogus conn_p pointer could end up being used to send the ISCSI_OP_ASYNC_EVENT + DROPPING_CONNECTION notifying the initiator that cmd->logout_cid has failed. The bug was manifesting itself as an OOPs in iscsit_allocate_cmd() with a bogus conn_p pointer in iscsit_build_conn_drop_async_message(). Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com> Reported-by: santosh kulkarni <santosh.kulkarni@calsoftinc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-23iscsi/iser-target: Fix isert_conn->state hung shutdown issuesNicholas Bellinger1-0/+4
commit defd884845297fd5690594bfe89656b01f16d87e upstream. This patch addresses a couple of different hug shutdown issues related to wait_event() + isert_conn->state. First, it changes isert_conn->conn_wait + isert_conn->conn_wait_comp_err from waitqueues to completions, and sets ISER_CONN_TERMINATING from within isert_disconnect_work(). Second, it splits isert_free_conn() into isert_wait_conn() that is called earlier in iscsit_close_connection() to ensure that all outstanding commands have completed before continuing. Finally, it breaks isert_cq_comp_err() into seperate TX / RX related code, and adds logic in isert_cq_rx_comp_err() to wait for outstanding commands to complete before setting ISER_CONN_DOWN and calling complete(&isert_conn->conn_wait_comp_err). Acked-by: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-23iscsi/iser-target: Use list_del_init for ->i_conn_nodeNicholas Bellinger2-10/+10
commit 5159d763f60af693a3fcec45dce2021f66e528a4 upstream. There are a handful of uses of list_empty() for cmd->i_conn_node within iser-target code that expect to return false once a cmd has been removed from the per connect list. This patch changes all uses of list_del -> list_del_init in order to ensure that list_empty() returns false as expected. Acked-by: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: <stable@vger.kernel.org> #3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-23iscsi-target: Fix iscsit_get_tpg_from_np tpg_state bugNicholas Bellinger1-1/+1
commit a2a99cea5ec7c1e47825559f0e75a4efbcf8aee3 upstream. This patch fixes a bug in iscsit_get_tpg_from_np() where the tpg->tpg_state sanity check was looking for TPG_STATE_FREE, instead of != TPG_STATE_ACTIVE. The latter is expected during a normal TPG shutdown once the tpg_state goes into TPG_STATE_INACTIVE in order to reject any new incoming login attempts. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06target/iscsi: Fix network portal creation raceAndy Grover1-13/+21
commit ee291e63293146db64668e8d65eb35c97e8324f4 upstream. When creating network portals rapidly, such as when restoring a configuration, LIO's code to reuse existing portals can return a false negative if the thread hasn't run yet and set np_thread_state to ISCSI_NP_THREAD_ACTIVE. This causes an error in the network stack when attempting to bind to the same address/port. This patch sets NP_THREAD_ACTIVE before the np is placed on g_np_list, so even if the thread hasn't run yet, iscsit_get_np will return the existing np. Also, convert np_lock -> np_mutex + hold across adding new net portal to g_np_list to prevent a race where two threads may attempt to create the same network portal, resulting in one of them failing. (nab: Add missing mutex_unlocks in iscsit_add_np failure paths) (DanC: Fix incorrect spin_unlock -> spin_unlock_bh) Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09target/file: Update hw_max_sectors based on current block_sizeNicholas Bellinger3-5/+13
commit 95cadace8f3959282e76ebf8b382bd0930807d2c upstream. This patch allows FILEIO to update hw_max_sectors based on the current max_bytes_per_io. This is required because vfs_[writev,readv]() can accept a maximum of 2048 iovecs per call, so the enforced hw_max_sectors really needs to be calculated based on block_size. This addresses a >= v3.5 bug where block_size=512 was rejecting > 1M sized I/O requests, because FD_MAX_SECTORS was hardcoded to 2048 for the block_size=4096 case. (v2: Use max_bytes_per_io instead of ->update_hw_max_sectors) Reported-by: Henrik Goldman <hg@x-formation.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09iscsi-target: Fix-up all zero data-length CDBs with R/W_BIT setNicholas Bellinger1-14/+12
commit 4454b66cb67f14c33cd70ddcf0ff4985b26324b7 upstream. This patch changes special case handling for ISCSI_OP_SCSI_CMD where an initiator sends a zero length Expected Data Transfer Length (EDTL), but still sets the WRITE and/or READ flag bits when no payload transfer is requested. Many, many moons ago two special cases where added for an ancient version of ESX that has long since been fixed, so instead of adding a new special case for the reported bug with a Broadcom 57800 NIC, go ahead and always strip off the incorrect WRITE + READ flag bits. Also, avoid sending a reject here, as RFC-3720 does mandate this case be handled without protocol error. Reported-by: Witold Bazakbal <865perl@wp.pl> Tested-by: Witold Bazakbal <865perl@wp.pl> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-12-04iscsi-target: chap auth shouldn't match username with trailing garbageEric Seppanen1-1/+4
commit 86784c6bdeeef78eed94d298be7a8879f6a97ee2 upstream. In iSCSI negotiations with initiator CHAP enabled, usernames with trailing garbage are permitted, because the string comparison only checks the strlen of the configured username. e.g. "usernameXXXXX" will be permitted to match "username". Just check one more byte so the trailing null char is also matched. Signed-off-by: Eric Seppanen <eric@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-12-04iscsi-target: fix extract_param to handle buffer length corner caseEric Seppanen1-1/+1
commit 369653e4fb511928511b0ce81f41c812ff1f28b6 upstream. extract_param() is called with max_length set to the total size of the output buffer. It's not safe to allow a parameter length equal to the buffer size as the terminating null would be written one byte past the end of the output buffer. Signed-off-by: Eric Seppanen <eric@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-12-04iscsi-target: Fix mutex_trylock usage in iscsit_increment_maxcmdsnNicholas Bellinger2-5/+6
commit 5e8e6b4b3adebf01a9d97056cbbfd8c44330df99 upstream. This patch fixes a >= v3.10 regression bug with mutex_trylock() usage within iscsit_increment_maxcmdsn(), that was originally added to allow for a special case where ->cmdsn_mutex was already held from the iscsit_execute_cmd() exception path for ib_isert. When !mutex_trylock() was occuring under contention during normal RX/TX process context codepaths, the bug was manifesting itself as the following protocol error: Received CmdSN: 0x000fcbb7 is greater than MaxCmdSN: 0x000fcbb6, protocol error. Received CmdSN: 0x000fcbb8 is greater than MaxCmdSN: 0x000fcbb6, protocol error. This patch simply avoids the direct ib_isert callback in lio_queue_status() for the special iscsi_execute_cmd() exception cases, that allows the problematic mutex_trylock() usage in iscsit_increment_maxcmdsn() to go away. Reported-by: Moussa Ba <moussaba@micron.com> Tested-by: Moussa Ba <moussaba@micron.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-11-13target/pscsi: fix return value checkWei Yongjun1-4/+4
commit 58932e96e438cd78f75e765d7b87ef39d3533d15 upstream. In case of error, the function scsi_host_lookup() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-13iscsi-target: Only perform wait_for_tasks when performing shutdownNicholas Bellinger1-2/+2
commit e255a28598e8e63070322fc89bd34189dd660a89 upstream. This patch changes transport_generic_free_cmd() to only wait_for_tasks when shutdown=true is passed to iscsit_free_cmd(). With the advent of >= v3.10 iscsi-target code using se_cmd->cmd_kref, the extra wait_for_tasks with shutdown=false is unnecessary, and may end up causing an extra context switch when releasing WRITEs. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-26target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-outGera Kazakov2-2/+2
commit f730f9158f6ee7b5c4d892af6b51a72194445ea4 upstream. This patch fixes a >= v3.9+ regression in __core_scsi3_write_aptpl_to_file() + core_alua_write_tpg_metadata() write-out, where a return value of -EIO was incorrectly being returned upon success. This bug was originally introduced in: commit 0e9b10a90f1c30f25dd6f130130240745ab14010 Author: Al Viro <viro@zeniv.linux.org.uk> Date: Sat Feb 23 15:22:43 2013 -0500 target: writev() on single-element vector is pointless However, given that the return of core_scsi3_update_and_write_aptpl() was not used to determine if a command should be returned with non GOOD status, this bug was not being triggered in PR logic until v3.11-rc1 by commit: commit 459f213ba162bd13e113d6f92a8fa6c780fd67ed Author: Andy Grover <agrover@redhat.com> Date: Thu May 16 10:41:02 2013 -0700 target: Allocate aptpl_buf inside update_and_write_aptpl() So, go ahead and only return -EIO if kernel_write() returned a negative value. Reported-by: Gera Kazakov <gkazakov@msn.com> Signed-off-by: Gera Kazakov <gkazakov@msn.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-07iscsi-target: Fix potential NULL pointer in solicited NOPOUT rejectNicholas Bellinger1-0/+8
commit 28aaa950320fc7b8df3f6d2d34fa7833391a9b72 upstream. This patch addresses a potential NULL pointer dereference regression in iscsit_setup_nop_out() code, specifically for two cases when a solicited NOPOUT triggers a ISCSI_REASON_PROTOCOL_ERROR reject to be generated. This is because iscsi_cmd is expected to be NULL for solicited NOPOUT case before iscsit_process_nop_out() locates the descriptor via TTT using iscsit_find_cmd_from_ttt(). This regression was originally introduced in: commit ba159914086f06532079fc15141f46ffe7e04a41 Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Wed Jul 3 03:48:24 2013 -0700 iscsi-target: Fix iscsit_add_reject* usage for iser Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-07iscsi-target: Fix iscsit_transport reference leak during NP thread resetNicholas Bellinger1-5/+4
commit c9a03c12464c851e691e8d5b6c9deba779c512e0 upstream. This patch fixes a bug in __iscsi_target_login_thread() where an explicit network portal thread reset ends up leaking the iscsit_transport module reference, along with the associated iscsi_conn allocation. This manifests itself with iser-target where a NP reset causes the extra iscsit_transport reference to be taken in iscsit_conn_set_transport() during the reset, which prevents the ib_isert module from being unloaded after the NP thread shutdown has finished. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-07iscsi-target: Fix ImmediateData=Yes failure regression in >= v3.10Nicholas Bellinger1-7/+2
commit 9d86a2befceb06ee83c1a588915e6d6e0abef797 upstream. This patch addresses a regression bug within ImmediateData=Yes failure handling that ends up triggering an OOPs within >= v3.10 iscsi-target code. The problem occurs when iscsit_process_scsi_cmd() does the call to target_put_sess_cmd(), and once again in iscsit_get_immediate_data() that is triggered during two different cases: - When iscsit_sequence_cmd() returns CMDSN_LOWER_THAN_EXP, for which the descriptor state will already have been set to ISTATE_REMOVE by iscsit_sequence_cmd(), and - When iscsi_cmd->sense_reason is set, for which iscsit_execute_cmd() will have already called transport_send_check_condition_and_sense() to queue the exception response. It changes iscsit_process_scsi_cmd() to drop the early call, and makes iscsit_get_immediate_data() call target_put_sess_cmd() from a single location after dumping the immediate data for the failed command. The regression was initially introduced in commit: commit 561bf15892375597ee59d473a704a3e634c4f311 Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Wed Jul 3 03:58:58 2013 -0700 iscsi-target: Fix iscsit_sequence_cmd reject handling for iser Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-07target: Fix trailing ASCII space usage in INQUIRY vendor+modelNicholas Bellinger1-3/+6
commit ee60bddba5a5f23e39598195d944aa0eb2d455e5 upstream. This patch fixes spc_emulate_inquiry_std() to add trailing ASCII spaces for INQUIRY vendor + model fields following SPC-4 text: "ASCII data fields described as being left-aligned shall have any unused bytes at the end of the field (i.e., highest offset) and the unused bytes shall be filled with ASCII space characters (20h)." This addresses a problem with Falconstor NSS multipathing. Reported-by: Tomas Molota <tomas.molota@lightstorm.sk> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-04iscsi-target: Fix iscsit_sequence_cmd reject handling for iserNicholas Bellinger4-28/+57
commit 561bf15892375597ee59d473a704a3e634c4f311 upstream This patch moves ISCSI_OP_REJECT failures into iscsit_sequence_cmd() in order to avoid external iscsit_reject_cmd() reject usage for all PDU types. It also updates PDU specific handlers for traditional iscsi-target code to not reset the session after posting a ISCSI_OP_REJECT during setup. (v2: Fix CMDSN_LOWER_THAN_EXP for ISCSI_OP_SCSI to call target_put_sess_cmd() after iscsit_sequence_cmd() failure) Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-04iscsi-target: Fix iscsit_add_reject* usage for iserNicholas Bellinger6-169/+116
commit ba159914086f06532079fc15141f46ffe7e04a41 upstream This patch changes iscsit_add_reject() + iscsit_add_reject_from_cmd() usage to not sleep on iscsi_cmd->reject_comp to address a free-after-use usage bug in v3.10 with iser-target code. It saves ->reject_reason for use within iscsit_build_reject() so the correct value for both transport cases. It also drops the legacy fail_conn parameter usage throughput iscsi-target code and adds two iscsit_add_reject_cmd() and iscsit_reject_cmd helper functions, along with various small cleanups. (v2: Re-enable target_put_sess_cmd() to be called from iscsit_add_reject_from_cmd() for rejects invoked after target_get_sess_cmd() has been called) Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-04iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iserNicholas Bellinger1-2/+10
commit 186a9647019587b3784694894c4d136fd00cfd7b upstream. This patch adds target_get_sess_cmd reference counting for iscsit_handle_task_mgt_cmd(), and adds a target_put_sess_cmd() for the failure case. It also fixes a bug where ISCSI_OP_SCSI_TMFUNC type commands where leaking iscsi_cmd->i_conn_node and eventually triggering an OOPs during struct isert_conn shutdown. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-04iser-target: Fix session reset bug with RDMA_CM_EVENT_DISCONNECTEDNicholas Bellinger1-0/+1
commit b2cb96494d83b894a43ba8b9023eead8ff50684b upstream. This patch addresses a bug where RDMA_CM_EVENT_DISCONNECTED may occur before the connection shutdown has been completed by rx/tx threads, that causes isert_free_conn() to wait indefinately on ->conn_wait. This patch allows isert_disconnect_work code to invoke rdma_disconnect when isert_disconnect_work() process context is started by client session reset before isert_free_conn() code has been reached. It also adds isert_conn->conn_mutex protection for ->state within isert_disconnect_work(), isert_cq_comp_err() and isert_free_conn() code, along with isert_check_state() for wait_event usage. (v2: Add explicit iscsit_cause_connection_reinstatement call during isert_disconnect_work() to force conn reset) Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-04iscsi-target: Fix tfc_tpg_nacl_auth_cit configfs length overflowJoern Engel1-1/+1
commit 0fbfc46fb0b2f543a8b539e94c6c293ebc0b05a6 upstream. This patch fixes a potential buffer overflow while processing iscsi_node_auth input for configfs attributes within NodeACL tfc_tpg_nacl_auth_cit context. Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-20iscsi-target: Remove left over v3.10-rc debug printksNicholas Bellinger3-8/+0
Reported-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-06-20target/iscsi: Fix op=disable + error handling cases in np_store_iserAndy Grover1-11/+14
Writing 0 when iser was not previously enabled, so succeed but do nothing so that user-space code doesn't need a try: catch block when ib_isert logic is not available. Also, return actual error from add_network_portal using PTR_ERR during op=enable failure. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-06-14target/iscsi: don't corrupt bh_count in iscsit_stop_time2retain_timer()Jörn Engel1-2/+2
Here is a fun one. Bug seems to have been introduced by commit 140854cb, almost two years ago. I have no idea why we only started seeing it now, but we did. Rough callgraph: core_tpg_set_initiator_node_queue_depth() `-> spin_lock_irqsave(&tpg->session_lock, flags); `-> lio_tpg_shutdown_session() `-> iscsit_stop_time2retain_timer() `-> spin_unlock_bh(&se_tpg->session_lock); `-> spin_lock_bh(&se_tpg->session_lock); `-> spin_unlock_irqrestore(&tpg->session_lock, flags); core_tpg_set_initiator_node_queue_depth() used to call spin_lock_bh(), but 140854cb changed that to spin_lock_irqsave(). However, lio_tpg_shutdown_session() still claims to be called with spin_lock_bh() held, as does iscsit_stop_time2retain_timer(): * Called with spin_lock_bh(&struct se_portal_group->session_lock) held Stale documentation is mostly annoying, but in this case the dropping the lock with the _bh variant is plain wrong. It is also wrong to drop locks two functions below the lock-holder, but I will ignore that bit for now. After some more locking and unlocking we eventually hit this backtrace: ------------[ cut here ]------------ WARNING: at kernel/softirq.c:159 local_bh_enable_ip+0xe8/0x100() Pid: 24645, comm: lio_helper.py Tainted: G O 3.6.11+ Call Trace: [<ffffffff8103e5ff>] warn_slowpath_common+0x7f/0xc0 [<ffffffffa040ae37>] ? iscsit_inc_conn_usage_count+0x37/0x50 [iscsi_target_mod] [<ffffffff8103e65a>] warn_slowpath_null+0x1a/0x20 [<ffffffff810472f8>] local_bh_enable_ip+0xe8/0x100 [<ffffffff815b8365>] _raw_spin_unlock_bh+0x15/0x20 [<ffffffffa040ae37>] iscsit_inc_conn_usage_count+0x37/0x50 [iscsi_target_mod] [<ffffffffa041149a>] iscsit_stop_session+0xfa/0x1c0 [iscsi_target_mod] [<ffffffffa0417fab>] lio_tpg_shutdown_session+0x7b/0x90 [iscsi_target_mod] [<ffffffffa033ede4>] core_tpg_set_initiator_node_queue_depth+0xe4/0x290 [target_core_mod] [<ffffffffa0409032>] iscsit_tpg_set_initiator_node_queue_depth+0x12/0x20 [iscsi_target_mod] [<ffffffffa0415c29>] lio_target_nacl_store_cmdsn_depth+0xa9/0x180 [iscsi_target_mod] [<ffffffffa0331b49>] target_fabric_nacl_base_attr_store+0x39/0x40 [target_core_mod] [<ffffffff811b857d>] configfs_write_file+0xbd/0x120 [<ffffffff81148f36>] vfs_write+0xc6/0x180 [<ffffffff81149251>] sys_write+0x51/0x90 [<ffffffff815c0969>] system_call_fastpath+0x16/0x1b ---[ end trace 3747632b9b164652 ]--- As a pure band-aid, this patch drops the _bh. Signed-off-by: Joern Engel <joern@logfs.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-31iscsi-target: Fix iscsit_free_cmd() se_cmd->cmd_kref shutdown handlingNicholas Bellinger4-26/+50
With the introduction of target_get_sess_cmd() referencing counting for ISCSI_OP_SCSI_CMD processing with iser-target, iscsit_free_cmd() usage in traditional iscsi-target driver code now needs to be aware of the active I/O shutdown case when a remaining se_cmd->cmd_kref reference may exist after transport_generic_free_cmd() completes, requiring a final target_put_sess_cmd() to release iscsi_cmd descriptor memory. This patch changes iscsit_free_cmd() to invoke __iscsit_free_cmd() before transport_generic_free_cmd() -> target_put_sess_cmd(), and also avoids aquiring the per-connection queue locks for typical fast-path calls during normal ISTATE_REMOVE operation. Also update iscsit_free_cmd() usage throughout iscsi-target to use the new 'bool shutdown' parameter. This patch fixes a regression bug introduced during v3.10-rc1 in commit 3e1c81a95, that was causing the following WARNING to appear: [ 257.235153] ------------[ cut here]------------ [ 257.240314] WARNING: at kernel/softirq.c:160 local_bh_enable_ip+0x3c/0x86() [ 257.248089] Modules linked in: vhost_scsi ib_srpt ib_cm ib_sa ib_mad ib_core tcm_qla2xxx tcm_loop tcm_fc libfc iscsi_target_mod target_core_pscsi target_core_file target_core_iblock target_core_mod configfs ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi loop acpi_cpufreq freq_table mperf kvm_intel kvm crc32c_intel button ehci_pci pcspkr joydev i2c_i801 microcode ext3 jbd raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx raid1 raid0 linear igb hwmon i2c_algo_bit i2c_core ptp ata_piix libata qla2xxx uhci_hcd ehci_hcd mlx4_core scsi_transport_fc scsi_tgt pps_core [ 257.308748] CPU: 1 PID: 3295 Comm: iscsi_ttx Not tainted 3.10.0-rc2+ #103 [ 257.316329] Hardware name: Intel Corporation S5520HC/S5520HC, BIOS S5500.86B.01.00.0057.031020111721 03/10/2011 [ 257.327597] ffffffff814c24b7 ffff880458331b58 ffffffff8138eef2 ffff880458331b98 [ 257.335892] ffffffff8102c052 ffff880400000008 0000000000000000 ffff88085bdf0000 [ 257.344191] ffff88085bdf00d8 ffff88085bdf00e0 ffff88085bdf00f8 ffff880458331ba8 [ 257.352488] Call Trace: [ 257.355223] [<ffffffff8138eef2>] dump_stack+0x19/0x1f [ 257.360963] [<ffffffff8102c052>] warn_slowpath_common+0x62/0x7b [ 257.367669] [<ffffffff8102c080>] warn_slowpath_null+0x15/0x17 [ 257.374181] [<ffffffff81032345>] local_bh_enable_ip+0x3c/0x86 [ 257.380697] [<ffffffff813917fd>] _raw_spin_unlock_bh+0x10/0x12 [ 257.387311] [<ffffffffa029069c>] iscsit_free_r2ts_from_list+0x5e/0x67 [iscsi_target_mod] [ 257.396438] [<ffffffffa02906c5>] iscsit_release_cmd+0x20/0x223 [iscsi_target_mod] [ 257.404893] [<ffffffffa02977a4>] lio_release_cmd+0x3a/0x3e [iscsi_target_mod] [ 257.412964] [<ffffffffa01d59a1>] target_release_cmd_kref+0x7a/0x7c [target_core_mod] [ 257.421712] [<ffffffffa01d69bc>] target_put_sess_cmd+0x5f/0x7f [target_core_mod] [ 257.430071] [<ffffffffa01d6d6d>] transport_release_cmd+0x59/0x6f [target_core_mod] [ 257.438625] [<ffffffffa01d6eb4>] transport_put_cmd+0x131/0x140 [target_core_mod] [ 257.446985] [<ffffffffa01d6192>] ? transport_wait_for_tasks+0xfa/0x1d5 [target_core_mod] [ 257.456121] [<ffffffffa01d6f11>] transport_generic_free_cmd+0x4e/0x52 [target_core_mod] [ 257.465159] [<ffffffff81050537>] ? __migrate_task+0x110/0x110 [ 257.471674] [<ffffffffa02904ba>] iscsit_free_cmd+0x46/0x55 [iscsi_target_mod] [ 257.479741] [<ffffffffa0291edb>] iscsit_immediate_queue+0x301/0x353 [iscsi_target_mod] [ 257.488683] [<ffffffffa0292f7e>] iscsi_target_tx_thread+0x1c6/0x2a8 [iscsi_target_mod] [ 257.497623] [<ffffffff81047486>] ? wake_up_bit+0x25/0x25 [ 257.503652] [<ffffffffa0292db8>] ? iscsit_ack_from_expstatsn+0xd5/0xd5 [iscsi_target_mod] [ 257.512882] [<ffffffff81046f89>] kthread+0xb0/0xb8 [ 257.518329] [<ffffffff81046ed9>] ? kthread_freezable_should_stop+0x60/0x60 [ 257.526105] [<ffffffff81396fec>] ret_from_fork+0x7c/0xb0 [ 257.532133] [<ffffffff81046ed9>] ? kthread_freezable_should_stop+0x60/0x60 [ 257.539906] ---[ end trace 5520397d0f2e0800 ]--- Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-31target: Propigate up ->cmd_kref put return via transport_generic_free_cmdNicholas Bellinger1-13/+15
Go ahead and propigate up the ->cmd_kref put return value from target_put_sess_cmd() -> transport_release_cmd() -> transport_put_cmd() -> transport_generic_free_cmd(). This is useful for certain fabrics when determining the active I/O shutdown case with SCF_ACK_KREF where a final target_put_sess_cmd() is still required by the caller. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-30iscsi-target: fix heap buffer overflow on errorKees Cook2-6/+6
If a key was larger than 64 bytes, as checked by iscsi_check_key(), the error response packet, generated by iscsi_add_notunderstood_response(), would still attempt to copy the entire key into the packet, overflowing the structure on the heap. Remote preauthentication kernel memory corruption was possible if a target was configured and listening on the network. CVE-2013-2850 Signed-off-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-30target/file: Fix off-by-one READ_CAPACITY bug for !S_ISBLK exportNicholas Bellinger1-5/+6
This patch fixes a bug where FILEIO was incorrectly reporting the number of logical blocks (+ 1) when using non struct block_device export mode. It changes fd_get_blocks() to follow all other backend ->get_blocks() cases, and reduces the calculated dev_size by one dev->dev_attrib.block_size number of bytes, and also fixes initial fd_block_size assignment at fd_configure_device() time introduced in commit 0fd97ccf4. Reported-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reported-by: Badari Pulavarty <pbadari@us.ibm.com> Tested-by: Badari Pulavarty <pbadari@us.ibm.com> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-29target: Re-instate sess_wait_list for target_wait_for_sess_cmdsNicholas Bellinger1-4/+14
Switch back to pre commit 1c7b13fe652 list splicing logic for active I/O shutdown with tcm_qla2xxx + ib_srpt fabrics. The original commit was done under the incorrect assumption that it's safe to walk se_sess->sess_cmd_list unprotected in target_wait_for_sess_cmds() after sess->sess_tearing_down = 1 has been set by target_sess_cmd_list_set_waiting() during session shutdown. So instead of adding sess->sess_cmd_lock protection around sess->sess_cmd_list during target_wait_for_sess_cmds(), switch back to sess->sess_wait_list to allow wait_for_completion() + TFO->release_cmd() to occur without having to walk ->sess_cmd_list after the list_splice. Also add a check to exit if target_sess_cmd_list_set_waiting() has already been called, and add a WARN_ON to check for any fabric bug where new se_cmds are added to sess->sess_cmd_list after sess->sess_tearing_down = 1 has already been set. Cc: Joern Engel <joern@logfs.org> Cc: Roland Dreier <roland@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-20target: Remove unused wait_for_tasks bit in target_wait_for_sess_cmdsJoern Engel1-23/+5
Drop unused transport_wait_for_tasks() check in target_wait_for_sess_cmds shutdown code, and convert tcm_qla2xxx + ib_srpt fabric drivers. Cc: Joern Engel <joern@logfs.org> Cc: Roland Dreier <roland@kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-16Merge branch 'queue' of ↵Linus Torvalds12-81/+73
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull target fixes from Nicholas Bellinger: "A handful of fixes + minor changes this time around, along with one important >= v3.9 regression fix for IBLOCK backends. The highlights include: - Use FD_MAX_SECTORS in FILEIO for block_device as well as files (agrover) - Fix processing of out-of-order CmdSNs with iSBD driver (shlomo) - Close long-standing target_put_sess_cmd() vs. core_tmr_abort_task() race with the addition of kref_put_spinlock_irqsave() (joern + greg-kh) - Fix IBLOCK WCE=1 + DPOFUA=1 backend WRITE regression in >= v3.9 (nab + bootc) Note these four patches are CC'ed to stable. Also, there is still some work left to be done on the active I/O shutdown path in target_wait_for_sess_cmds() used by tcm_qla2xxx + ib_isert fabrics that is still being discussed on the list, and will hopefully be resolved soon." * 'queue' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: target: close target_put_sess_cmd() vs. core_tmr_abort_task() race target: removed unused transport_state flag target/iblock: Fix WCE=1 + DPOFUA=1 backend WRITE regression MAINTAINERS: Update target git tree URL iscsi-target: Fix typos in RDMAEXTENSIONS macro usage target/rd: Add ramdisk bit for NULLIO operation iscsi-target: Fix processing of OOO commands iscsi-target: Make buf param of iscsit_do_crypto_hash_buf() const void * iscsi-target: Fix NULL pointer dereference in iscsit_send_reject target: Have dev/enable show if TCM device is configured target: Use FD_MAX_SECTORS/FD_BLOCKSIZE for blockdevs using fileio target: Remove unused struct members in se_dev_entry
2013-05-15target: close target_put_sess_cmd() vs. core_tmr_abort_task() raceJoern Engel1-6/+5
It is possible for one thread to to take se_sess->sess_cmd_lock in core_tmr_abort_task() before taking a reference count on se_cmd->cmd_kref, while another thread in target_put_sess_cmd() drops se_cmd->cmd_kref before taking se_sess->sess_cmd_lock. This introduces kref_put_spinlock_irqsave() and uses it in target_put_sess_cmd() to close the race window. Signed-off-by: Joern Engel <joern@logfs.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-05 10:29:51 +0000