CIFS: Fix a possible memory corruption in push locks
commit e3d240e9d5
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -260,7 +260,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
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* and check it for zero before using.
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* and check it for zero before using.
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*/
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*/
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max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
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max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
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if (!max_buf) {
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if (max_buf < sizeof(struct smb2_lock_element)) {
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free_xid(xid);
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free_xid(xid);
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return -EINVAL;
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return -EINVAL;
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}
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}
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