diff options
| author | Johannes Thumshirn <jthumshirn@suse.de> | 2018-09-21 09:01:01 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-20 09:48:51 +0200 |
| commit | 4c0e2e4a4b54d2893d2664edf6f043199803b9bc (patch) | |
| tree | 994735e1298f45f1c9416ddd22872ab83c7da72e | |
| parent | b6b5bc245dc23cfa6dcbf0bb1e13b606066471af (diff) | |
scsi: sd: don't crash the host on invalid commands
[ Upstream commit f1f1fadacaf08b7cf11714c0c29f8fa4d4ef68a9 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 4a532318b211..6d3091ff9b92 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1285,7 +1285,8 @@ 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; } } |