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authorJohannes Thumshirn <jthumshirn@suse.de>2018-09-21 09:01:01 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2018-09-21 12:42:57 -0400
commitf1f1fadacaf08b7cf11714c0c29f8fa4d4ef68a9 (patch)
treebc8108d9a193f10828bbdb234c20f332493bbd5f /drivers/scsi
parent318ddb34b2052f838aa243d07173e2badf3e630e (diff)
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>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/sd.c3
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;
}
}