From: Eric Biggers <ebiggers@xxxxxxxxxx>
kill_f2fs_super() is called even if f2fs_fill_super() fails.
f2fs_fill_super() frees the struct f2fs_sb_info, so it must set
sb->s_fs_info to NULL to prevent it from being freed again.
Fixes: 275dca4630c1 ("f2fs: move release of block devices to after kill_block_super()")
Reported-by: syzbot+8f477ac014ff5b32d81f@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://lore.kernel.org/r/0000000000006cb174060ec34502@xxxxxxxxxx
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
fs/f2fs/super.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index d00d21a8b53ad..d45ab0992ae59 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4873,20 +4873,21 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
kfree(F2FS_OPTION(sbi).s_qf_names[i]);
#endif
fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
kvfree(options);
free_sb_buf:
kfree(raw_super);
free_sbi:
if (sbi->s_chksum_driver)
crypto_free_shash(sbi->s_chksum_driver);
kfree(sbi);
+ sb->s_fs_info = NULL;
/* give only one another chance */
if (retry_cnt > 0 && skip_recovery) {
retry_cnt--;
shrink_dcache_sb(sb);
goto try_onemore;
}
return err;
}
base-commit: 38814330fedd778edffcabe0c8cb462ee365782e
--
2.43.0
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