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| author | Joern Engel <joern@logfs.org> | 2010-04-15 08:03:57 +0200 |
|---|---|---|
| committer | Joern Engel <joern@logfs.org> | 2010-04-15 08:03:57 +0200 |
| commit | 1f1b0008e8dd1930d6e89522c70f4a438374302a (patch) | |
| tree | fb35404bdb4db79925891779e3be118eca8e85dd /fs/logfs | |
| parent | ead88af5f577fd2b399a0fcdfe52605116fac489 (diff) | |
| download | kernel-common-1f1b0008e8dd1930d6e89522c70f4a438374302a.tar.gz kernel-common-1f1b0008e8dd1930d6e89522c70f4a438374302a.tar.bz2 kernel-common-1f1b0008e8dd1930d6e89522c70f4a438374302a.zip | |
[LogFS] Prevent mempool_destroy NULL pointer dereference
It would probably be better to just accept NULL pointers in
mempool_destroy(). But for the current -rc series let's keep things
simple.
This patch was lost in the cracks for a while.
Kevin Cernekee <cernekee@gmail.com> had to rediscover the problem and
send a similar patch because of it. :(
Signed-off-by: Joern Engel <joern@logfs.org>
Diffstat (limited to 'fs/logfs')
| -rw-r--r-- | fs/logfs/logfs.h | 6 | ||||
| -rw-r--r-- | fs/logfs/readwrite.c | 6 | ||||
| -rw-r--r-- | fs/logfs/segment.c | 2 | ||||
| -rw-r--r-- | fs/logfs/super.c | 4 |
4 files changed, 11 insertions, 7 deletions
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h index c9929eed80b1..0a3df1a0c936 100644 --- a/fs/logfs/logfs.h +++ b/fs/logfs/logfs.h @@ -727,4 +727,10 @@ static inline struct logfs_area *get_area(struct super_block *sb, return logfs_super(sb)->s_area[(__force u8)gc_level]; } +static inline void logfs_mempool_destroy(mempool_t *pool) +{ + if (pool) + mempool_destroy(pool); +} + #endif diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c index 7e0c39c49719..aca6c56a107a 100644 --- a/fs/logfs/readwrite.c +++ b/fs/logfs/readwrite.c @@ -2243,8 +2243,6 @@ void logfs_cleanup_rw(struct super_block *sb) struct logfs_super *super = logfs_super(sb); destroy_meta_inode(super->s_segfile_inode); - if (super->s_block_pool) - mempool_destroy(super->s_block_pool); - if (super->s_shadow_pool) - mempool_destroy(super->s_shadow_pool); + logfs_mempool_destroy(super->s_block_pool); + logfs_mempool_destroy(super->s_shadow_pool); } diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c index 02db22ebbf13..8c82fe05d3e1 100644 --- a/fs/logfs/segment.c +++ b/fs/logfs/segment.c @@ -912,7 +912,7 @@ err: for (i--; i >= 0; i--) free_area(super->s_area[i]); free_area(super->s_journal_area); - mempool_destroy(super->s_alias_pool); + logfs_mempool_destroy(super->s_alias_pool); return -ENOMEM; } diff --git a/fs/logfs/super.c b/fs/logfs/super.c index d6e1f4fc3115..d4531eb46d0a 100644 --- a/fs/logfs/super.c +++ b/fs/logfs/super.c @@ -517,8 +517,8 @@ static void logfs_kill_sb(struct super_block *sb) if (super->s_erase_page) __free_page(super->s_erase_page); super->s_devops->put_device(sb); - mempool_destroy(super->s_btree_pool); - mempool_destroy(super->s_alias_pool); + logfs_mempool_destroy(super->s_btree_pool); + logfs_mempool_destroy(super->s_alias_pool); kfree(super); log_super("LogFS: Finished unmounting\n"); } |