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| author | Hugh Dickins <hughd@google.com> | 2010-08-18 02:23:56 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-18 05:33:11 +0400 |
| commit | 602586a83b719df0fbd94196a1359ed35aeb2df3 (patch) | |
| tree | 1ff381d77769e352397edd2f6a7aa8ca5ba929f1 /mm/shmem.c | |
| parent | 19147d0eb1472eac690a9a708893d4de096bbfcf (diff) | |
| download | linux-602586a83b719df0fbd94196a1359ed35aeb2df3.tar.xz | |
shmem: put_super must percpu_counter_destroy
list_add() corruption messages reported from shmem_fill_super()'s recently
introduced percpu_counter_init(): shmem_put_super() needs to remember to
percpu_counter_destroy(). And also check error from percpu_counter_init().
Reported-bisected-and-tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index dfaa0f4e9789..080b09a57a8f 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2325,7 +2325,10 @@ static int shmem_show_options(struct seq_file *seq, struct vfsmount *vfs) static void shmem_put_super(struct super_block *sb) { - kfree(sb->s_fs_info); + struct shmem_sb_info *sbinfo = SHMEM_SB(sb); + + percpu_counter_destroy(&sbinfo->used_blocks); + kfree(sbinfo); sb->s_fs_info = NULL; } @@ -2367,7 +2370,8 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) #endif spin_lock_init(&sbinfo->stat_lock); - percpu_counter_init(&sbinfo->used_blocks, 0); + if (percpu_counter_init(&sbinfo->used_blocks, 0)) + goto failed; sbinfo->free_inodes = sbinfo->max_inodes; sb->s_maxbytes = SHMEM_MAX_BYTES; |