From: Maurizio Lombardi <mlombard@redhat.com>
Date: Fri, 15 Nov 2019 17:37:27 +0100
Subject: scsi: scsi_debug: num_tgts must be >= 0
Git-commit: aa5334c4f3014940f11bf876e919c956abef4089
Patch-mainline: v5.5-rc1
References: git-fixes
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 <mlombard@redhat.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/scsi_debug.c | 5 +++++
1 file changed, 5 insertions(+)
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;