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author | Jeff Layton <jlayton@redhat.com> | 2011-08-23 11:21:28 (GMT) |
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committer | Steve French <sfrench@us.ibm.com> | 2011-09-20 02:14:40 (GMT) |
commit | 9438fabb73eb48055b58b89fc51e0bc4db22fabd (patch) | |
tree | d8cb3ac7c9e9e3ead5e57b9e362bd2a7084781a4 /block | |
parent | 9d037a777695993ec7437e5f451647dea7919d4c (diff) | |
download | linux-fsl-qoriq-9438fabb73eb48055b58b89fc51e0bc4db22fabd.tar.xz |
cifs: fix possible memory corruption in CIFSFindNext
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.
Cc: <stable@kernel.org>
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>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions