From aa5334c4f3014940f11bf876e919c956abef4089 Mon Sep 17 00:00:00 2001 From: Maurizio Lombardi Date: Fri, 15 Nov 2019 17:37:27 +0100 Subject: scsi: scsi_debug: num_tgts must be >= 0 Passing the parameter "num_tgts=-1" will start an infinite loop that exhausts the system memory Link: https://lore.kernel.org/r/20191115163727.24626-1-mlombard@redhat.com Signed-off-by: Maurizio Lombardi Acked-by: Douglas Gilbert Signed-off-by: Martin K. Petersen --- drivers/scsi/scsi_debug.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 4daf2637c011..44cb054d5e66 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -5263,6 +5263,11 @@ static int __init scsi_debug_init(void) return -EINVAL; } + if (sdebug_num_tgts < 0) { + pr_err("num_tgts must be >= 0\n"); + return -EINVAL; + } + if (sdebug_guard > 1) { pr_err("guard must be 0 or 1\n"); return -EINVAL; -- cgit v1.2.3