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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-08-30 16:30:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-27 11:00:16 +0200 |
| commit | d8663aa2778965c75b5e75c7948b44f5de601a88 (patch) | |
| tree | de70158adeda5c1930d3627c507d723dfc5d6cef /kernel/trace/trace_selftest.c | |
| parent | 72896ca30a7f6ceb5238714d5761e4ad4521ccc5 (diff) | |
scsi: qla2xxx: Fix an integer overflow in sysfs code
commit e6f77540c067b48dee10f1e33678415bfcc89017 upstream.
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
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/trace/trace_selftest.c')
0 files changed, 0 insertions, 0 deletions