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| author | Tao Ma <boyu.mt@taobao.com> | 2011-10-06 10:22:28 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-10-06 10:22:28 -0400 |
| commit | 7aa0baeaba4afc4fbed7aad2812a1116e6b0adcd (patch) | |
| tree | a7237b599107d0adf137c465734d4b67ad83d6dd | |
| parent | 5356f2615cd558c57a1f7d7528d1ad4de3640d96 (diff) | |
| download | op-kernel-dev-7aa0baeaba4afc4fbed7aad2812a1116e6b0adcd.zip op-kernel-dev-7aa0baeaba4afc4fbed7aad2812a1116e6b0adcd.tar.gz | |
ext4: Free resources in ext4_mb_init()'s error paths
In commit 79a77c5ac, we move ext4_mb_init_backend after the allocation
of s_locality_group to avoid memory leak in error path, but there are
still some other error paths in ext4_mb_init that need to do the same
work. So this patch adds all the error patch for ext4_mb_init. And all
the pointers are reset to NULL in case the caller may double free them.
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/mballoc.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 1c83161..8c005c0 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2504,7 +2504,7 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) sbi->s_locality_groups = alloc_percpu(struct ext4_locality_group); if (sbi->s_locality_groups == NULL) { ret = -ENOMEM; - goto out; + goto out_free_groupinfo_slab; } for_each_possible_cpu(i) { struct ext4_locality_group *lg; @@ -2517,9 +2517,8 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) /* init file for buddy data */ ret = ext4_mb_init_backend(sb); - if (ret != 0) { - goto out; - } + if (ret != 0) + goto out_free_locality_groups; if (sbi->s_proc) proc_create_data("mb_groups", S_IRUGO, sbi->s_proc, @@ -2527,11 +2526,19 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) if (sbi->s_journal) sbi->s_journal->j_commit_callback = release_blocks_on_commit; + + return 0; + +out_free_locality_groups: + free_percpu(sbi->s_locality_groups); + sbi->s_locality_groups = NULL; +out_free_groupinfo_slab: + ext4_groupinfo_destroy_slabs(); out: - if (ret) { - kfree(sbi->s_mb_offsets); - kfree(sbi->s_mb_maxs); - } + kfree(sbi->s_mb_offsets); + sbi->s_mb_offsets = NULL; + kfree(sbi->s_mb_maxs); + sbi->s_mb_maxs = NULL; return ret; } |
