Commit 0c3973c7 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by Greg Kroah-Hartman

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: default avatarJohannes 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: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c4cd341a
......@@ -1158,7 +1158,8 @@ static int sd_init_command(struct scsi_cmnd *cmd)
case REQ_OP_WRITE:
return sd_setup_read_write_cmnd(cmd);
default:
BUG();
WARN_ON_ONCE(1);
return BLKPREP_KILL;
}
}
......
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