diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2024-05-20 22:30:40 -0400 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-05-23 20:35:32 -0400 |
| commit | d09c05aa35909adb7d29f92f0cd79fdcd1338ef0 (patch) | |
| tree | 2d3b6c4830241858f2416b69d7de340b30623b17 /include/linux/page_idle.h | |
| parent | e4f5f8298cf6ddae43210d236ad65ac2c6379559 (diff) | |
scsi: core: Handle devices which return an unusually large VPD page count
Peter Schneider reported that a system would no longer boot after
updating to 6.8.4. Peter bisected the issue and identified commit
b5fc07a5fb56 ("scsi: core: Consult supported VPD page list prior to
fetching page") as being the culprit.
Turns out the enclosure device in Peter's system reports a byteswapped
page length for VPD page 0. It reports "02 00" as page length instead
of "00 02". This causes us to attempt to access 516 bytes (page length
+ header) of information despite only 2 pages being present.
Limit the page search scope to the size of our VPD buffer to guard
against devices returning a larger page count than requested.
Link: https://lore.kernel.org/r/20240521023040.2703884-1-martin.petersen@oracle.com
Fixes: b5fc07a5fb56 ("scsi: core: Consult supported VPD page list prior to fetching page")
Cc: stable@vger.kernel.org
Reported-by: Peter Schneider <pschneider1968@googlemail.com>
Closes: https://lore.kernel.org/all/eec6ebbf-061b-4a7b-96dc-ea748aa4d035@googlemail.com/
Tested-by: Peter Schneider <pschneider1968@googlemail.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/linux/page_idle.h')
0 files changed, 0 insertions, 0 deletions