This is a note to let you know that I've just added the patch titled
scsi: scsi_debug: num_tgts must be >= 0
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-scsi_debug-num_tgts-must-be-0.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d7c5bfa39dacd3d2b864ef8727e6cc68e263a779
Author: Maurizio Lombardi <mlombard@xxxxxxxxxx>
Date: Fri Nov 15 17:37:27 2019 +0100
scsi: scsi_debug: num_tgts must be >= 0
[ Upstream commit aa5334c4f3014940f11bf876e919c956abef4089 ]
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@xxxxxxxxxx
Signed-off-by: Maurizio Lombardi <mlombard@xxxxxxxxxx>
Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 65305b3848bc..a1dbae806fde 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -5351,6 +5351,11 @@ 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;
