diff options
author | Jeff Layton <jlayton@redhat.com> | 2011-08-23 07:21:28 -0400 |
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committer | Willy Tarreau <w@1wt.eu> | 2012-02-11 15:37:41 +0100 |
commit | de885f182add8990043f636a45490476d424c7f1 (patch) | |
tree | abb4c2337741be7ffdf392dca72d5fd2e55d5357 /drivers | |
parent | 9009994b06f745e914a74a8e9efb3c5bf3612dd7 (diff) |
cifs: fix possible memory corruption in CIFSFindNext
commit 9438fabb73eb48055b58b89fc51e0bc4db22fabd upstream.
The name_len variable in CIFSFindNext is a signed int that gets set to
the resume_name_len in the cifs_search_info. The resume_name_len however
is unsigned and for some infolevels is populated directly from a 32 bit
value sent by the server.
If the server sends a very large value for this, then that value could
look negative when converted to a signed int. That would make that
value pass the PATH_MAX check later in CIFSFindNext. The name_len would
then be used as a length value for a memcpy. It would then be treated
as unsigned again, and the memcpy scribbles over a ton of memory.
Fix this by making the name_len an unsigned value in CIFSFindNext.
Reported-by: Darren Lavender <dcl@hppine99.gbr.hp.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions