[PATCH 1/9] pstore/zone: cap the maximum device size

[Christoph Hellwig]

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

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 fs/pstore/zone.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/pstore/zone.c b/fs/pstore/zone.c
index 3ce89216670c9b..5266ccbec007f3 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) {
-- 
2.28.0