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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-08-30 15:30:35 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-08-31 04:06:20 +0200 |
| commit | e6f77540c067b48dee10f1e33678415bfcc89017 (patch) | |
| tree | 61834b8b55fec5959bd84c127eb9814b39afe340 /drivers/scsi/fdomain.c | |
| parent | scsi: storvsc: fix memory leak on ring buffer busy (diff) | |
| download | linux-e6f77540c067b48dee10f1e33678415bfcc89017.tar.xz linux-e6f77540c067b48dee10f1e33678415bfcc89017.zip | |
scsi: qla2xxx: Fix an integer overflow in sysfs code
The value of "size" comes from the user. When we add "start + size" it
could lead to an integer overflow bug.
It means we vmalloc() a lot more memory than we had intended. I believe
that on 64 bit systems vmalloc() can succeed even if we ask it to
allocate huge 4GB buffers. So we would get memory corruption and likely
a crash when we call ha->isp_ops->write_optrom() and ->read_optrom().
Only root can trigger this bug.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=194061
Cc: <stable@vger.kernel.org>
Fixes: b7cc176c9eb3 ("[SCSI] qla2xxx: Allow region-based flash-part accesses.")
Reported-by: shqking <shqking@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/fdomain.c')
0 files changed, 0 insertions, 0 deletions