Commit 87d5e4a8 authored Dec 10, 2020 by Huang Yiwei

pstore: Add buffer start check during init



The missing check to prz->start can cause crash because it
can be any value and used to locate the write position, so
add the start check to avoid.

Change-Id: If8ed4db8d9dafab656dd5793aed597463fab628d
Signed-off-by: Huang Yiwei <hyiwei@codeaurora.org>

parent b54ec6fd

fs/pstore/ram_core.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -507,7 +507,7 @@ static int persistent_ram_post_init(struct persistent_ram_zone *prz, u32 sig,
		sig ^= PERSISTENT_RAM_SIG;

		if (prz->buffer->sig == sig) {
		if (buffer_size(prz) == 0) {
		if (buffer_size(prz) == 0 && buffer_start(prz) == 0) {
		pr_debug("found existing empty buffer\n");
		return 0;
		}