diff options
Diffstat (limited to 'fs/cifs/cifssmb.c')
| -rw-r--r-- | fs/cifs/cifssmb.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index ef9786b6bea..824df142f28 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1414,8 +1414,13 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon, const int netfid, cFYI(1, ("Reading %d bytes on fid %d", count, netfid)); if (tcon->ses->capabilities & CAP_LARGE_FILES) wct = 12; - else + else { wct = 10; /* old style read */ + if ((lseek >> 32) > 0) { + /* can not handle this big offset for old */ + return -EIO; + } + } *nbytes = 0; rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **) &pSMB); @@ -1431,8 +1436,6 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon, const int netfid, pSMB->OffsetLow = cpu_to_le32(lseek & 0xFFFFFFFF); if (wct == 12) pSMB->OffsetHigh = cpu_to_le32(lseek >> 32); - else if ((lseek >> 32) > 0) /* can not handle this big offset for old */ - return -EIO; pSMB->Remaining = 0; pSMB->MaxCount = cpu_to_le16(count & 0xFFFF); @@ -1519,8 +1522,13 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon, if (tcon->ses->capabilities & CAP_LARGE_FILES) wct = 14; - else + else { wct = 12; + if ((offset >> 32) > 0) { + /* can not handle big offset for old srv */ + return -EIO; + } + } rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB, (void **) &pSMBr); @@ -1535,8 +1543,6 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon, pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF); if (wct == 14) pSMB->OffsetHigh = cpu_to_le32(offset >> 32); - else if ((offset >> 32) > 0) /* can not handle big offset for old srv */ - return -EIO; pSMB->Reserved = 0xFFFFFFFF; pSMB->WriteMode = 0; @@ -1621,10 +1627,15 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon, cFYI(1, ("write2 at %lld %d bytes", (long long)offset, count)); - if (tcon->ses->capabilities & CAP_LARGE_FILES) + if (tcon->ses->capabilities & CAP_LARGE_FILES) { wct = 14; - else + } else { wct = 12; + if ((offset >> 32) > 0) { + /* can not handle big offset for old srv */ + return -EIO; + } + } rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB); if (rc) return rc; @@ -1637,8 +1648,6 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon, pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF); if (wct == 14) pSMB->OffsetHigh = cpu_to_le32(offset >> 32); - else if ((offset >> 32) > 0) /* can not handle big offset for old srv */ - return -EIO; pSMB->Reserved = 0xFFFFFFFF; pSMB->WriteMode = 0; pSMB->Remaining = 0; |