diff options
| author | Wei Fang <fangwei1@huawei.com> | 2016-07-06 17:00:25 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-07-20 20:53:35 -0400 |
| commit | 354a086d9369cb7471790fa047665884f2bc6d79 (patch) | |
| tree | 50ddfb91b7794b71fb436eceab099018a157032a | |
| parent | dd7328e4c53649c1c7ec36bc1cf5b229b8662047 (diff) | |
| download | linux-354a086d9369cb7471790fa047665884f2bc6d79.tar.bz2 | |
scsi:libsas: fix oops caused by assigning a freed task to ->lldd_task
A freed task has been assigned to ->lldd_task when lldd_execute_task()
failed in sas_ata_qc_issue(), and access of ->lldd_task will cause an
oops:
Call trace:
[<ffffffc000641f64>] sas_ata_post_internal+0x6c/0x150
[<ffffffc0006c0d64>] ata_exec_internal_sg+0x32c/0x588
[<ffffffc0006c1048>] ata_exec_internal+0x88/0xe8
[<ffffffc0006c13b4>] ata_dev_read_id+0x204/0x5e0
[<ffffffc0006c17f0>] ata_dev_reread_id+0x60/0xc8
[<ffffffc0006c3098>] ata_dev_revalidate+0x88/0x1e0
[<ffffffc0006cf828>] ata_eh_recover+0xcf8/0x13a8
[<ffffffc0006d075c>] ata_do_eh+0x5c/0xe0
[<ffffffc0006d0828>] ata_std_error_handler+0x48/0x98
[<ffffffc0006d042c>] ata_scsi_port_error_handler+0x474/0x658
[<ffffffc000641b78>] async_sas_ata_eh+0x50/0x80
[<ffffffc0000ca664>] async_run_entry_fn+0x64/0x180
[<ffffffc0000c085c>] process_one_work+0x164/0x438
[<ffffffc0000c0c74>] worker_thread+0x144/0x4b0
[<ffffffc0000c70fc>] kthread+0xfc/0x110
Fix this by reassigning NULL to ->lldd_task in error path.
Signed-off-by: Wei Fang <fangwei1@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/libsas/sas_ata.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 935c43095109..596a5450f0eb 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -253,6 +253,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) if (qc->scsicmd) ASSIGN_SAS_TASK(qc->scsicmd, NULL); sas_free_task(task); + qc->lldd_task = NULL; ret = AC_ERR_SYSTEM; } |