This is a note to let you know that I've just added the patch titled
scsi: target: tcmu: Return from tcmu_handle_completions() if cmd_id not found
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-target-tcmu-return-from-tcmu_handle_completions.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 64aeae2375895b2cd45740ee5a13eb11f63d2be7
Author: Bodo Stroesser <bostroesser@xxxxxxxxx>
Date: Fri Apr 23 17:01:23 2021 +0200
scsi: target: tcmu: Return from tcmu_handle_completions() if cmd_id not found
[ Upstream commit 9814b55cde0588b6d9bc496cee43f87316cbc6f1 ]
If tcmu_handle_completions() finds an invalid cmd_id while looping over cmd
responses from userspace it sets TCMU_DEV_BIT_BROKEN and breaks the
loop. This means that it does further handling for the tcmu device.
Skip that handling by replacing 'break' with 'return'.
Additionally change tcmu_handle_completions() from unsigned int to bool,
since the value used in return already is bool.
Link: https://lore.kernel.org/r/20210423150123.24468-1-bostroesser@xxxxxxxxx
Signed-off-by: Bodo Stroesser <bostroesser@xxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 7d5814a95e1e..c6950f157b99 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -1391,7 +1391,7 @@ static int tcmu_run_tmr_queue(struct tcmu_dev *udev)
return 1;
}
-static unsigned int tcmu_handle_completions(struct tcmu_dev *udev)
+static bool tcmu_handle_completions(struct tcmu_dev *udev)
{
struct tcmu_mailbox *mb;
struct tcmu_cmd *cmd;
@@ -1434,7 +1434,7 @@ static unsigned int tcmu_handle_completions(struct tcmu_dev *udev)
pr_err("cmd_id %u not found, ring is broken\n",
entry->hdr.cmd_id);
set_bit(TCMU_DEV_BIT_BROKEN, &udev->flags);
- break;
+ return false;
}
tcmu_handle_completion(cmd, entry);
