diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2020-05-23 13:11:29 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-05-26 15:54:39 -0400 |
| commit | 9d7464b18892332e35ff37f0b024429a1a9835e6 (patch) | |
| tree | ccad8981cb88f58af183191de83c95ff157835f0 /drivers/target/target_core_user.c | |
| parent | 5ae6a6a915033bfee79e76e0c374d4f927909edc (diff) | |
scsi: target: tcmu: Fix a use after free in tcmu_check_expired_queue_cmd()
The pr_debug() dereferences "cmd" after we already freed it by calling
tcmu_free_cmd(cmd). The debug printk needs to be done earlier.
Link: https://lore.kernel.org/r/20200523101129.GB98132@mwanda
Fixes: 61fb24822166 ("scsi: target: tcmu: Userspace must not complete queued commands")
Reviewed-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target/target_core_user.c')
| -rw-r--r-- | drivers/target/target_core_user.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 1d030d57c28c..0e281d30d81e 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1292,13 +1292,13 @@ static void tcmu_check_expired_queue_cmd(struct tcmu_cmd *cmd) if (!time_after(jiffies, cmd->deadline)) return; + pr_debug("Timing out queued cmd %p on dev %s.\n", + cmd, cmd->tcmu_dev->name); + list_del_init(&cmd->queue_entry); se_cmd = cmd->se_cmd; tcmu_free_cmd(cmd); - pr_debug("Timing out queued cmd %p on dev %s.\n", - cmd, cmd->tcmu_dev->name); - target_complete_cmd(se_cmd, SAM_STAT_TASK_SET_FULL); } |