From b7b7fa43103a9fb30dbcc60cbd5161fdfc25f904 Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Mon, 29 Mar 2010 15:12:39 -0400 Subject: [PATCH] reiserfs: Fix locking BUG during mount failure Commit 8ebc423238341b52912c7295b045a32477b33f09 (reiserfs: kill-the-BKL) introduced a bug in the mount failure case. The error label releases the lock before calling journal_release_error, but it requires that the lock be held. do_journal_release unlocks and retakes it. When it releases it without it held, we trigger a BUG(). The error_alloc label skips the unlock since the lock isn't held yet but none of the other conditions that are clean up exist yet either. This patch returns immediately after the kzalloc failure and moves the reiserfs_write_unlock after the journal_release_error call. This was reported in https://bugzilla.novell.com/show_bug.cgi?id=591807 Reported-by: Thomas Siedentopf Signed-off-by: Jeff Mahoney Cc: Thomas Siedentopf Cc: Andrew Morton Cc: 2.6.33.x Signed-off-by: Frederic Weisbecker --- fs/reiserfs/super.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 04bf5d791bda..ab190511bc18 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -1618,10 +1618,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) save_mount_options(s, data); sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); - if (!sbi) { - errval = -ENOMEM; - goto error_alloc; - } + if (!sbi) + return -ENOMEM; s->s_fs_info = sbi; /* Set default values for options: non-aggressive tails, RO on errors */ REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); @@ -1878,12 +1876,12 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) return (0); error: - reiserfs_write_unlock(s); -error_alloc: if (jinit_done) { /* kill the commit thread, free journal ram */ journal_release_error(NULL, s); } + reiserfs_write_unlock(s); + reiserfs_free_bitmap_cache(s); if (SB_BUFFER_WITH_SB(s)) brelse(SB_BUFFER_WITH_SB(s));