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author | Serge E. Hallyn <serue@us.ibm.com> | 2009-12-15 16:47:27 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:20:09 -0800 |
commit | 7d6feeb287c61aafa88f06345387b1188edf4b86 (patch) | |
tree | b07d1033d8980256d596686d75c2207b1f2cce0a /ipc | |
parent | 1be53963b0519bd3681749a9bed8b83aeb005cca (diff) | |
download | kernel_samsung_tuna-7d6feeb287c61aafa88f06345387b1188edf4b86.zip kernel_samsung_tuna-7d6feeb287c61aafa88f06345387b1188edf4b86.tar.gz kernel_samsung_tuna-7d6feeb287c61aafa88f06345387b1188edf4b86.tar.bz2 |
ipc ns: fix memory leak (idr)
We have apparently had a memory leak since
7ca7e564e049d8b350ec9d958ff25eaa24226352 "ipc: store ipcs into IDRs" in
2007. The idr of which 3 exist for each ipc namespace is never freed.
This patch simply frees them when the ipcns is freed. I don't believe any
idr_remove() are done from rcu (and could therefore be delayed until after
this idr_destroy()), so the patch should be safe. Some quick testing
showed no harm, and the memory leak fixed.
Caught by kmemleak.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
-rw-r--r-- | ipc/msg.c | 1 | ||||
-rw-r--r-- | ipc/sem.c | 1 | ||||
-rw-r--r-- | ipc/shm.c | 1 |
3 files changed, 3 insertions, 0 deletions
@@ -125,6 +125,7 @@ void msg_init_ns(struct ipc_namespace *ns) void msg_exit_ns(struct ipc_namespace *ns) { free_ipcs(ns, &msg_ids(ns), freeque); + idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr); } #endif @@ -129,6 +129,7 @@ void sem_init_ns(struct ipc_namespace *ns) void sem_exit_ns(struct ipc_namespace *ns) { free_ipcs(ns, &sem_ids(ns), freeary); + idr_destroy(&ns->ids[IPC_SEM_IDS].ipcs_idr); } #endif @@ -101,6 +101,7 @@ static void do_shm_rmid(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp) void shm_exit_ns(struct ipc_namespace *ns) { free_ipcs(ns, &shm_ids(ns), do_shm_rmid); + idr_destroy(&ns->ids[IPC_SHM_IDS].ipcs_idr); } #endif |