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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.

Fixes: eca4873ee1 ("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>
This commit is contained in:
Hyeongseok Kim 2020-11-12 18:14:54 +09:00 committed by Jaegeuk Kim
parent 34178b1bc4
commit 89ff600503
1 changed files with 1 additions and 0 deletions
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fs/f2fs/super.c
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@ -3918,6 +3918,7 @@ free_bio_info:
#ifdef CONFIG_UNICODE
utf8_unload(sb->s_encoding);
sb->s_encoding = NULL;
#endif
free_options:
#ifdef CONFIG_QUOTA