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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2018-09-21 09:01:01 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-09-21 18:42:57 +0200 |
| commit | f1f1fadacaf08b7cf11714c0c29f8fa4d4ef68a9 (patch) | |
| tree | bc8108d9a193f10828bbdb234c20f332493bbd5f | |
| parent | scsi: ipr: System hung while dlpar adding primary ipr adapter back (diff) | |
| download | linux-f1f1fadacaf08b7cf11714c0c29f8fa4d4ef68a9.tar.xz linux-f1f1fadacaf08b7cf11714c0c29f8fa4d4ef68a9.zip | |
scsi: sd: don't crash the host on invalid commands
When sd_init_command() get's a command with a unknown req_op() it crashes the
system via BUG().
This makes debugging the actual reason for the broken request cmd_flags pretty
hard as the system is down before it's able to write out debugging data on the
serial console or the trace buffer.
Change the BUG() to a WARN_ON() and return BLKPREP_KILL to fail gracefully and
return an I/O error to the producer of the request.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/sd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 5e4f10d28065..4a57ffecc7e6 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1276,7 +1276,8 @@ static int sd_init_command(struct scsi_cmnd *cmd) case REQ_OP_ZONE_RESET: return sd_zbc_setup_reset_cmnd(cmd); default: - BUG(); + WARN_ON_ONCE(1); + return BLKPREP_KILL; } } |