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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-08-30 13:30:35 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-27 12:39:23 (GMT) |
| commit | 2a913aecc4f746ce15eb1bec98b134aff4190ae2 (patch) | |
| tree | fe8c82d0126708b5cda97be689cff63c607a5749 /kernel | |
| parent | 6e2a0259da7a6c772d5bd2e7475616055a39192d (diff) | |
| download | linux-2a913aecc4f746ce15eb1bec98b134aff4190ae2.tar.xz | |
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')
0 files changed, 0 insertions, 0 deletions