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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2018-05-18 16:09:16 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-05-26 08:49:01 +0200
commit338762ca45d072bce8e9c38ba07a194516a58dba (patch)
tree379da0608f614db4f1b23a535e8ccde3dc35fc6b
parent87c807f1eff39a5b0fc440fac931fcaeba257395 (diff)
hfsplus: stop workqueue when fill_super() failed
commit 66072c29328717072fd84aaff3e070e3f008ba77 upstream. syzbot is reporting ODEBUG messages at hfsplus_fill_super() [1]. This is because hfsplus_fill_super() forgot to call cancel_delayed_work_sync(). As far as I can see, it is hfsplus_mark_mdb_dirty() from hfsplus_new_inode() in hfsplus_fill_super() that calls queue_delayed_work(). Therefore, I assume that hfsplus_new_inode() does not fail if queue_delayed_work() was called, and the out_put_hidden_dir label is the appropriate location to call cancel_delayed_work_sync(). [1] https://syzkaller.appspot.com/bug?id=a66f45e96fdbeb76b796bf46eb25ea878c42a6c9 Link: http://lkml.kernel.org/r/964a8b27-cd69-357c-fe78-76b066056201@I-love.SAKURA.ne.jp Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reported-by: syzbot <syzbot+4f2e5f086147d543ab03@syzkaller.appspotmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: David Howells <dhowells@redhat.com> Cc: Ernesto A. Fernandez <ernesto.mnd.fernandez@gmail.com> Cc: Vyacheslav Dubeyko <slava@dubeyko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/hfsplus/super.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 7302d96ae8bf..fa40e756c501 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -585,6 +585,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
return 0;
out_put_hidden_dir:
+ cancel_delayed_work_sync(&sbi->sync_work);
iput(sbi->hidden_dir);
out_put_root:
dput(sb->s_root);