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authorChristoph Hellwig <hch@lst.de>2020-10-16 16:20:39 +0300
committerKees Cook <keescook@chromium.org>2020-12-01 22:32:55 +0300
commitcbf82e35031b135928f36e72c6d166e935530b6a (patch)
tree7d893bafdff0aca400ced8dcb6eb930442a05f8c /fs/pstore/zone.c
parent3cea11cd5e3b00d91caf0b4730194039b45c5891 (diff)
downloadlinux-cbf82e35031b135928f36e72c6d166e935530b6a.tar.xz
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
Diffstat (limited to 'fs/pstore/zone.c')
-rw-r--r--fs/pstore/zone.c4
1 files changed, 4 insertions, 0 deletions
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) {