[PATCH 0/1] f2fs: fix sanity_check_raw_super on big endian machines
From: Martin Blumenstingl
Date: Fri Dec 21 2018 - 14:28:45 EST
Big endian machines (at least the one I have access to) cannot mount
f2fs filesystems anymore.
This is with Linux 4.14.89 but I suspect that 4.9.144 (and later) is
affected as well.
commit 0cfe75c5b01199 ("f2fs: enhance sanity_check_raw_super() to avoid
potential overflows") treats the "block_count" from struct
f2fs_super_block as 32-bit little endian value instead of a 64-bit
little endian value.
I tested this fix on top of Linux 4.14.49 but it seems that all stable
and mainline kernel versions are affected:
- 4.9.144 and later because 0cfe75c5b01199 was backported there
- 4.14.86 and later because 0cfe75c5b01199 was backported there
Martin Blumenstingl (1):
f2fs: fix validation of the block count in sanity_check_raw_super
fs/f2fs/super.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)