From cbf82e35031b135928f36e72c6d166e935530b6a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 16 Oct 2020 15:20:39 +0200 Subject: 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 Reviewed-by: WeiXiong Liao Reviewed-by: Kees Cook Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20201016132047.3068029-2-hch@lst.de --- fs/pstore/zone.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'fs/pstore') diff --git a/fs/pstore/zone.c b/fs/pstore/zone.c index 3ce89216670c..5266ccbec007 100644 --- a/fs/pstore/zone.c +++ b/fs/pstore/zone.c @@ -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) { -- cgit v1.2.3