Commit 8d87f304 authored Nov 12, 2020 by Hyeongseok Kim Committed by Lee Jones Feb 01, 2023

UPSTREAM: f2fs: fix double free of unicode map



In case of retrying fill_super with skip_recovery,
s_encoding for casefold would not be loaded again even though it's
already been freed because it's not NULL.
Set NULL after free to prevent double freeing when unmount.

Bug: 254441685
Fixes: eca4873ee1b6 ("f2fs: Use generic casefolding support")
Signed-off-by: Hyeongseok Kim <hyeongseok@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 89ff6005039a878afac87889fee748fa3f957c3a)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I5704830b6c96f6696dba7333eda6309490a2eb34

parent 3c7c6e08

fs/f2fs/super.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -3868,6 +3868,7 @@ static int f2fs_fill_super(struct super_block sb, void data, int silent)

		#ifdef CONFIG_UNICODE
		utf8_unload(sb->s_encoding);
		sb->s_encoding = NULL;
		#endif
		free_options:
		#ifdef CONFIG_QUOTA