Commit cbf82e35 authored Oct 16, 2020 by Christoph Hellwig Committed by Kees Cook Dec 01, 2020

pstore/zone: cap the maximum device size



Introduce an abritrary 128MiB cap to avoid malloc failures when using
a larger block device.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: WeiXiong Liao <gmpy.liaowx@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201016132047.3068029-2-hch@lst.de

parent 3cea11cd

fs/pstore/zone.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1299,6 +1299,10 @@ int register_pstore_zone(struct pstore_zone_info *info)
		pr_warn("total_size must be >= 4096\n");
		return -EINVAL;
		}
		if (info->total_size > SZ_128M) {
		pr_warn("capping size to 128MiB\n");
		info->total_size = SZ_128M;
		}

		if (!info->kmsg_size && !info->pmsg_size && !info->console_size &&
		!info->ftrace_size) {

Admin message