From 2021f083ed634f8233054a6299d95666a933434e Mon Sep 17 00:00:00 2001 From: Alberto Sánchez Molero Date: Sat, 20 Jan 2018 09:17:57 +0200 Subject: fs: btrfs: Fix unaligned memory accesses MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Loading files stored with lzo compression from a btrfs filesystem was producing unaligned memory accesses, which were causing a data abort and a reset on an Orange Pi Zero. The change in hash.c is not triggered by any error but follows the same pattern. Please confirm. Fixed according to doc/README.unaligned-memory-access.txt Signed-off-by: Alberto Sánchez Molero Tested-by: Robert Nelson --- fs/btrfs/compression.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/btrfs/compression.c') diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index a59ff5a8bb..b1b4498fba 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -9,6 +9,7 @@ #include "btrfs.h" #include #include +#include static u32 decompress_lzo(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen) { @@ -19,7 +20,7 @@ static u32 decompress_lzo(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen) if (clen < 4) return -1; - tot_len = le32_to_cpu(*(u32 *) cbuf); + tot_len = le32_to_cpu(get_unaligned((u32 *)cbuf)); cbuf += 4; clen -= 4; tot_len -= 4; @@ -32,7 +33,7 @@ static u32 decompress_lzo(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen) res = 0; while (tot_len > 4) { - in_len = le32_to_cpu(*(u32 *) cbuf); + in_len = le32_to_cpu(get_unaligned((u32 *)cbuf)); cbuf += 4; clen -= 4; -- cgit v1.2.3