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2013-06-17curl: Don't set curl options on the handle just before it's going to be deleted.Richard W.M. Jones1-2/+0
(Found by Kamil Dudka) Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Cc: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-06-17block/curl.c: Refuse to open the handle for writes.Richard W.M. Jones1-0/+6
Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-06-11curl: Whitespace only changes.Richard W.M. Jones1-2/+2
Trivial patch to remove odd whitespace. Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-04-22block: Remove filename parameter from .bdrv_file_open()Kevin Wolf1-2/+1
It is unused now in all block drivers. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-04-22curl: Use bdrv_open options instead of filenameKevin Wolf1-51/+102
As a bonus, going through the QemuOpts QEMU_OPT_SIZE parser for the readahead option gives us proper error reporting that the previous use of atoi() lacked. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-03-22block: Add options QDict to bdrv_file_open() prototypesKevin Wolf1-1/+2
The new parameter is unused yet. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-02-13block/curl: only restrict protocols with libcurl>=7.19.4Stefan Hajnoczi1-0/+4
The curl_easy_setopt(state->curl, CURLOPT_PROTOCOLS, ...) interface was introduced in libcurl 7.19.4. Therefore we cannot protect against CVE-2013-0249 when linking against an older libcurl. This fixes the build failure introduced by fb6d1bbd246c7a57ef53d3847ef225cd1349d602. Reported-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Andreas Färber <andreas.faeber@web.de> Message-id: 1360743934-8337-1-git-send-email-stefanha@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-08block/curl: disable extra protocols to prevent CVE-2013-0249Stefan Hajnoczi1-0/+11
There is a buffer overflow in libcurl POP3/SMTP/IMAP. The workaround is simple: disable extra protocols so that they cannot be exploited. Full details here: http://curl.haxx.se/docs/adv_20130206.html QEMU only cares about HTTP, HTTPS, FTP, FTPS, and TFTP. I have tested that this fix prevents the exploit on my host with libcurl-7.27.0-5.fc18. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-19block: move include files to include/block/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-14aio: rename AIOPool to AIOCBInfoStefan Hajnoczi1-2/+2
Now that AIOPool no longer keeps a freelist, it isn't really a "pool" anymore. Rename it to AIOCBInfo and make it const since it no longer needs to be modified. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-12block/curl: Fix wrong free statementStefan Weil1-2/+1
Report from smatch: block/curl.c:546 curl_close(21) info: redundant null check on s->url calling free() The check was redundant, and free was also wrong because the memory was allocated using g_strdup. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-06-11allow qemu_iovec_from_buffer() to specify offset from which to start copyingMichael Tokarev1-3/+3
Similar to qemu_iovec_memset(QEMUIOVector *qiov, size_t offset, int c, size_t bytes); the new prototype is: qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset, const void *buf, size_t bytes); The processing starts at offset bytes within qiov. This way, we may copy a bounce buffer directly to a middle of qiov. This is exactly the same function as iov_from_buf() from iov.c, so use the existing implementation and rename it to qemu_iovec_from_buf() to be shorter and to match the utility function. As with utility implementation, we now assert that the offset is inside actual iovec. Nothing changed for current callers, because `offset' parameter is new. While at it, stop using "bounce-qiov" in block/qcow2.c and copy decrypted data directly from cluster_data instead of recreating a temp qiov for doing that. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-04-19aio: remove process_queue callback and qemu_aio_process_queuePaolo Bonzini1-6/+4
Both unused after the previous patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-04-03block/curl: Replace usleep by g_usleepStefan Weil1-1/+1
The function usleep is not available for all supported platforms: at least some versions of MinGW don't support it. usleep was also declared obsolete by POSIX.1-2001. The function g_usleep is part of glib2.0, so it is available for all supported platforms. Using nanosleep would also be possible but needs more code. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-15block: qemu_aio_get does not return NULLPaolo Bonzini1-4/+0
Initially done with the following semantic patch: @ rule1 @ expression E; statement S; @@ E = qemu_aio_get (...); ( - if (E == NULL) { ... } | - if (E) { <... S ...> } ) which however missed occurrences in linux-aio.c and posix-aio-compat.c. Those were done by hand. The change in vdi_aio_setup's caller was also done by hand. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-21block/curl: Don't finish AIOCBs too earlyNick Thomas1-19/+49
The previous behaviour was to finish AIOCBs inside curl_aio_readv() if the data was cached. This caused the following failed assertion at hw/ide/pci.c:314: bmdma_cmd_writeb "Assertion `bm->bus->dma->aiocb == ((void *)0)' failed." By scheduling a QEMUBH and performing the completion inside the callback, we avoid this problem. Signed-off-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-09-21block/curl: Implement a flush function on the fd handlersNick Thomas1-4/+22
Signed-off-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-23block/curl: Handle failed reads gracefully.Nicholas Thomas1-1/+19
Current behaviour if a read fails is for the acb to not get finished. This causes an infinite loop in bdrv_read_em (block.c). The read failure never gets reported to the guest and if the error condition clears, the process never recovers. With this patch, when curl reports a failure we finish the acb as a failure. This results in the guest receiving an I/O error (rather than the read hanging indefinitely) and if the error condition subsequently clears, retries work as expected. The simplest test is to put an ISO on a web server you have control over and open it with qemu-io. Then move the ISO out of the way and attempt to read some data - you should see behaviour matching the above. Signed-off-by: Nick Thomas <nick@bytemark.co.uk> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori1-5/+5
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-05-22Fix %lld or %llx printf format useBlue Swirl1-6/+8
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-05-03block: Open the underlying image file in generic codeKevin Wolf1-5/+5
Format drivers shouldn't need to bother with things like file names, but rather just get an open BlockDriverState for the underlying protocol. This patch introduces this behaviour for bdrv_open implementation. For protocols which need to access the filename to open their file/device/connection/... a new callback bdrv_file_open is introduced which doesn't get an underlying file opened. For now, also some of the more obscure formats use bdrv_file_open because they open() the file themselves instead of using the block.c functions. They need to be fixed in later patches. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-02-10don't dereference NULL after failed strdupJim Meyering1-1/+1
Most of these are obvious NULL-deref bug fixes, for example, the ones in these files: block/curl.c net.c slirp/misc.c and the first one in block/vvfat.c. The others in block/vvfat.c may not lead to an immediate segfault, but I traced the two schedule_rename(..., strdup(path)) uses, and a failed strdup would appear to trigger this assertion in handle_renames_and_mkdirs: assert(commit->path); The conversion to use qemu_strdup in envlist_to_environ is not technically needed, but does avoid a theoretical leak in the caller when strdup fails for one value, but later succeeds in allocating another buffer(plausible, if one string length is much larger than the others). The caller does not know the length of the returned list, and as such can only free pointers until it hits the first NULL. If there are non-NULL pointers beyond the first, their buffers would be leaked. This one is admittedly far-fetched. The two in linux-user/main.c are worth fixing to ensure that an OOM error is diagnosed up front, rather than letting it provoke some harder-to-diagnose secondary error, in case of exec failure, or worse, in case the exec succeeds but with an invalid list of command line options. However, considering how unlikely it is to encounter a failed strdup early in main, this isn't a big deal. Note that adding the required uses of qemu_strdup here and in envlist.c induce link failures because qemu_strdup is not currently in any library they're linked with. So for now, I've omitted those changes, as well as the fixes in target-i386/helper.c and target-sparc/helper.c. If you'd like to see the above discussion (or anything else) in the commit log, just let me know and I'll be happy to adjust. >From 9af42864fd1ea666bd25e2cecfdfae74c20aa8c7 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering@redhat.com> Date: Mon, 8 Feb 2010 18:29:29 +0100 Subject: [PATCH] don't dereference NULL after failed strdup Handle failing strdup by replacing each use with qemu_strdup, so as not to dereference NULL or trigger a failing assertion. * block/curl.c (curl_open): s/\bstrdup\b/qemu_strdup/ * block/vvfat.c (init_directories): Likewise. (get_cluster_count_for_direntry, check_directory_consistency): Likewise. * net.c (parse_host_src_port): Likewise. * slirp/misc.c (fork_exec): Likewise. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-08block/curl: %Z is not a valid conversion specifiermalc1-1/+1
Signed-off-by: malc <av1474@comtv.ru>
2010-02-07Do not use dprintfmalc1-8/+8
dprintf is already claimed by POSIX[1], and on at least one system is implemented as a macro [1] http://www.opengroup.org/onlinepubs/9699919799/functions/dprintf.html Signed-off-by: malc <av1474@comtv.ru>
2009-10-27Add qemu_aio_process_queue()Kevin Wolf1-4/+4
We'll leave some AIO completions unhandled when we can't call the callback. qemu_aio_process_queue() is used later to run any callbacks that are left and can be run then. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-08-01Fix Sparse warning about "expression using sizeof on a function"Blue Swirl1-3/+3
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-07-09Allow adjustment of http block device's readahead size, via a newNolan1-3/+47
":readahead=###:" suffix. Signed-off-by: Nolan Leake <nolan <at> sigbus.net> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-27fully split aio_pool from BlockDriverChristoph Hellwig1-16/+11
Now that we have a separate aio pool structure we can remove those aio pool details from BlockDriver. Every driver supporting AIO now needs to declare a static AIOPool with the aiocb size and the cancellation method. This cleans up the current code considerably and will make it cleaner and more obvious to support two different aio implementations behind a single BlockDriver. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-22Add HTTP protocol using curl v6Alexander Graf1-0/+523
Currently Qemu can read from posix I/O and NBD. This patch adds a third protocol to the game: HTTP. In certain situations it can be useful to access HTTP data directly, for example if you want to try out an http provided OS image, but don't know if you want to download it yet. Using this patch you can now try it on on the fly. Just use it like: qemu -cdrom http://host/path/my.iso Signed-off-by: Alexander Graf <agraf@suse.de>
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