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pstore/zone: cap the maximum device size

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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
This commit is contained in:
Christoph Hellwig 2020-10-16 15:20:39 +02:00 committed by Kees Cook
parent 3cea11cd5e
commit cbf82e3503
1 changed files with 4 additions and 0 deletions
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4
fs/pstore/zone.c
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@ -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) {