diff options
| author | Jitendra Bhivare <[email protected]> | 2016-12-13 15:55:55 +0530 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2017-01-05 00:21:12 -0500 |
| commit | 987132167f4bfb132cd56601f77d2bd5ba9cff4a (patch) | |
| tree | 01a6a4c9a2c37b06eb7117dfe25f37c9ab3d8519 /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | f3505013779646704f81b41c011ab089b26c3f3e (diff) | |
scsi: be2iscsi: Fix for crash in beiscsi_eh_device_reset
System crashes when sg_reset is executed in a loop.
CPU: 13 PID: 7073 Comm: sg_reset Tainted: G E 4.8.0-rc1+ #4
RIP: 0010:[<ffffffffa0825370>] [<ffffffffa0825370>]
beiscsi_eh_device_reset+0x160/0x520 [be2iscsi]
Call Trace:
[<ffffffff814c7c77>] ? scsi_host_alloc_command+0x47/0xc0
[<ffffffff814caafa>] scsi_try_bus_device_reset+0x2a/0x50
[<ffffffff814cb46e>] scsi_ioctl_reset+0x13e/0x260
[<ffffffff814ca477>] scsi_ioctl+0x137/0x3d0
[<ffffffffa05e4ba2>] sg_ioctl+0x572/0xc20 [sg]
[<ffffffff8123f627>] do_vfs_ioctl+0xa7/0x5d0
The accesses to beiscsi_io_task is being protected in device reset handler
with frwd_lock but the freeing of task can happen under back_lock.
Hold the reference of iscsi_task till invalidation completes.
This prevents use of ICD when invalidation of that ICD is being processed.
Use frwd_lock for iscsi_tasks looping and back_lock to access
beiscsi_io_task structures.
Rewrite mgmt_invalidation_icds to handle allocation and freeing of IOCTL
buffer in one place.
Signed-off-by: Jitendra Bhivare <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions