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| author | Pavel Shilovsky <pshilov@microsoft.com> | 2016-11-29 16:14:43 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-03-16 02:26:29 +0000 |
| commit | 6359e20b91dd72fc5268f61ceb9dea9775d96555 (patch) | |
| tree | 773e60c5b7cf314003a41a5cd65d8dda3f59bd49 /fs | |
| parent | b225d49f0342e7a47cd9f69d4b31a9c0d4046679 (diff) | |
| download | linux-stable-6359e20b91dd72fc5268f61ceb9dea9775d96555.tar.gz linux-stable-6359e20b91dd72fc5268f61ceb9dea9775d96555.tar.bz2 linux-stable-6359e20b91dd72fc5268f61ceb9dea9775d96555.zip | |
CIFS: Fix a possible memory corruption in push locks
commit e3d240e9d505fc67f8f8735836df97a794bbd946 upstream.
If maxBuf is not 0 but less than a size of SMB2 lock structure
we can end up with a memory corruption.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/smb2file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index 45992944e238..b87b07504947 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -241,7 +241,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) * and check it for zero before using. */ max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf; - if (!max_buf) { + if (max_buf < sizeof(struct smb2_lock_element)) { free_xid(xid); return -EINVAL; } |