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| author | Minfei Huang <huangminfei@ucloud.cn> | 2014-06-04 16:11:53 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-07 16:53:53 -0700 |
| commit | 849c177302db129212c3c5432191fc3c88f75620 (patch) | |
| tree | 2a0fac3a22321b49d2c5048d288d722604f144d9 | |
| parent | 9425aebd98c802a40beeae04a5df947a7c76afe6 (diff) | |
| download | lwn-849c177302db129212c3c5432191fc3c88f75620.tar.gz lwn-849c177302db129212c3c5432191fc3c88f75620.zip | |
lib/btree.c: fix leak of whole btree nodes
commit c75b53af2f0043aff500af0a6f878497bef41bca upstream.
I use btree from 3.14-rc2 in my own module. When the btree module is
removed, a warning arises:
kmem_cache_destroy btree_node: Slab cache still has objects
CPU: 13 PID: 9150 Comm: rmmod Tainted: GF O 3.14.0-rc2 #1
Hardware name: Inspur NF5270M3/NF5270M3, BIOS CHEETAH_2.1.3 09/10/2013
Call Trace:
dump_stack+0x49/0x5d
kmem_cache_destroy+0xcf/0xe0
btree_module_exit+0x10/0x12 [btree]
SyS_delete_module+0x198/0x1f0
system_call_fastpath+0x16/0x1b
The cause is that it doesn't release the last btree node, when height = 1
and fill = 1.
[akpm@linux-foundation.org: remove unneeded test of NULL]
Signed-off-by: Minfei Huang <huangminfei@ucloud.cn>
Cc: Joern Engel <joern@logfs.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | lib/btree.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/btree.c b/lib/btree.c index f9a484676cb6..4264871ea1a0 100644 --- a/lib/btree.c +++ b/lib/btree.c @@ -198,6 +198,7 @@ EXPORT_SYMBOL_GPL(btree_init); void btree_destroy(struct btree_head *head) { + mempool_free(head->node, head->mempool); mempool_destroy(head->mempool); head->mempool = NULL; } |