tree 6b8dfaecbbe53c2b8172e32283e40e128c746e6b
parent 07239fc854ec61b3cdc400d2a50d322d39c673f6
author Ben Zhang <benzh@chromium.org> 1432227034 -0700
committer Tony Luck <tony.luck@intel.com> 1432227034 -0700

pstore/ram: verify ramoops header before saving record

On some devices the persistent memory contains junk after a cold boot,
and /dev/pstore/dmesg-ramoops-* are created with random data which is
not the result of a kernel crash.

This patch adds a ramoops header check and skips any
persistent_ram_zone that does not have a valid header.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>