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authorShetty, Harshini X (EXT-Sony Mobile) <Harshini.X.Shetty@sony.com>2020-03-17 09:15:45 +0000
committerMike Snitzer <snitzer@redhat.com>2020-03-24 12:00:29 -0400
commit75fa601934fda23d2f15bf44b09c2401942d8e15 (patch)
treed08d1341dff0ab639c7be2c331261302bc5bc404 /drivers/md
parentdc8a01ae1dbd7bac98368da4d8f81632512429f5 (diff)
dm verity fec: fix memory leak in verity_fec_dtr
Fix below kmemleak detected in verity_fec_ctr. output_pool is allocated for each dm-verity-fec device. But it is not freed when dm-table for the verity target is removed. Hence free the output mempool in destructor function verity_fec_dtr. unreferenced object 0xffffffffa574d000 (size 4096): comm "init", pid 1667, jiffies 4294894890 (age 307.168s) hex dump (first 32 bytes): 8e 36 00 98 66 a8 0b 9b 00 00 00 00 00 00 00 00 .6..f........... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000060e82407>] __kmalloc+0x2b4/0x340 [<00000000dd99488f>] mempool_kmalloc+0x18/0x20 [<000000002560172b>] mempool_init_node+0x98/0x118 [<000000006c3574d2>] mempool_init+0x14/0x20 [<0000000008cb266e>] verity_fec_ctr+0x388/0x3b0 [<000000000887261b>] verity_ctr+0x87c/0x8d0 [<000000002b1e1c62>] dm_table_add_target+0x174/0x348 [<000000002ad89eda>] table_load+0xe4/0x328 [<000000001f06f5e9>] dm_ctl_ioctl+0x3b4/0x5a0 [<00000000bee5fbb7>] do_vfs_ioctl+0x5dc/0x928 [<00000000b475b8f5>] __arm64_sys_ioctl+0x70/0x98 [<000000005361e2e8>] el0_svc_common+0xa0/0x158 [<000000001374818f>] el0_svc_handler+0x6c/0x88 [<000000003364e9f4>] el0_svc+0x8/0xc [<000000009d84cec9>] 0xffffffffffffffff Fixes: a739ff3f543af ("dm verity: add support for forward error correction") Depends-on: 6f1c819c219f7 ("dm: convert to bioset_init()/mempool_init()") Cc: stable@vger.kernel.org Signed-off-by: Harshini Shetty <harshini.x.shetty@sony.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-verity-fec.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c
index 3ceeb6b404ed..49147e634046 100644
--- a/drivers/md/dm-verity-fec.c
+++ b/drivers/md/dm-verity-fec.c
@@ -551,6 +551,7 @@ void verity_fec_dtr(struct dm_verity *v)
mempool_exit(&f->rs_pool);
mempool_exit(&f->prealloc_pool);
mempool_exit(&f->extra_pool);
+ mempool_exit(&f->output_pool);
kmem_cache_destroy(f->cache);
if (f->data_bufio)