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qemu-img: improve queue depth validation in img_bench

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This error was discovered by fuzzing qemu-img.

Currently, running `qemu-img bench -d 0` in img_bench is allowed,
which is a pointless operation and causes qemu-img to hang.

Signed-off-by: Denis Rastyogin <gerben@altlinux.org>
Message-ID: <20250327162423.25154-5-gerben@altlinux.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Denis Rastyogin 2025-03-27 19:24:23 +03:00 • committed by Kevin Wolf
parent ed1aef1716
commit 2b689db0be
1 changed files with 1 additions and 1 deletions
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2
qemu-img.c
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@ -4571,7 +4571,7 @@ static int img_bench(int argc, char **argv)
{ {
unsigned long res; unsigned long res;
if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { if (qemu_strtoul(optarg, NULL, 0, &res) <= 0 || res > INT_MAX) {
error_report("Invalid queue depth specified"); error_report("Invalid queue depth specified");
return 1; return 1;
} }