From dcf4c1144f3af47e451773d4f989db255c46ff11 Mon Sep 17 00:00:00 2001 From: Taesoo Kim Date: Wed, 12 Oct 2016 23:19:18 -0400 Subject: jbd2: fix incorrect unlock on j_list_lock [ Upstream commit 559cce698eaf4ccecb2213b2519ea3a0413e5155 ] When 'jh->b_transaction == transaction' (asserted by below) J_ASSERT_JH(jh, (jh->b_transaction == transaction || ... 'journal->j_list_lock' will be incorrectly unlocked, since the the lock is aquired only at the end of if / else-if statements (missing the else case). Signed-off-by: Taesoo Kim Signed-off-by: Theodore Ts'o Reviewed-by: Andreas Dilger Fixes: 6e4862a5bb9d12be87e4ea5d9a60836ebed71d28 Cc: stable@vger.kernel.org # 3.14+ Signed-off-by: Sasha Levin --- fs/jbd2/transaction.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/jbd2/transaction.c') diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index ff2f2e6ad311..2abbb2babcae 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1087,6 +1087,7 @@ int jbd2_journal_get_create_access(handle_t *handle, struct buffer_head *bh) JBUFFER_TRACE(jh, "file as BJ_Reserved"); spin_lock(&journal->j_list_lock); __jbd2_journal_file_buffer(jh, transaction, BJ_Reserved); + spin_unlock(&journal->j_list_lock); } else if (jh->b_transaction == journal->j_committing_transaction) { /* first access by this transaction */ jh->b_modified = 0; @@ -1094,8 +1095,8 @@ int jbd2_journal_get_create_access(handle_t *handle, struct buffer_head *bh) JBUFFER_TRACE(jh, "set next transaction"); spin_lock(&journal->j_list_lock); jh->b_next_transaction = transaction; + spin_unlock(&journal->j_list_lock); } - spin_unlock(&journal->j_list_lock); jbd_unlock_bh_state(bh); /* -- cgit v1.2.3