|
 |
2de9d45 |
From 14d329da03ea1145efce866b127b10ea6390b5e1 Mon Sep 17 00:00:00 2001
|
|
|
2de9d45 |
From: Murphy Zhou <jencce.kernel@gmail.com>
|
|
|
2de9d45 |
Date: Sun, 29 Sep 2019 17:56:59 +0800
|
|
|
2de9d45 |
Subject: [PATCH] mm/kmemleak: skip late_init if not skip disable
|
|
|
2de9d45 |
|
|
|
2de9d45 |
Now if DEFAULT_OFF set to y, kmemleak_init will start the cleanup_work
|
|
|
2de9d45 |
workqueue. Then late_init call will set kmemleak_initialized to 1, the
|
|
|
2de9d45 |
cleaup workqueue will try to do cleanup, triggering:
|
|
|
2de9d45 |
|
|
|
2de9d45 |
[24.738773] ==================================================================
|
|
|
2de9d45 |
[24.742784] BUG: KASAN: global-out-of-bounds in __kmemleak_do_cleanup+0x166/0x180
|
|
|
2de9d45 |
[24.744144] Key type ._fscrypt registered
|
|
|
2de9d45 |
[24.745680] Read of size 8 at addr ffffffff88746c90 by task kworker/3:1/171
|
|
|
2de9d45 |
[24.745687]
|
|
|
2de9d45 |
[24.745697] CPU: 3 PID: 171 Comm: kworker/3:1 Not tainted 5.3.0-v5.3-12475-gcbafe18 #1
|
|
|
2de9d45 |
[24.745701] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
|
|
|
2de9d45 |
[24.745710] Workqueue: events kmemleak_do_cleanup
|
|
|
2de9d45 |
[24.745717] Call Trace:
|
|
|
2de9d45 |
[24.745736] dump_stack+0x7c/0xc0
|
|
|
2de9d45 |
[24.745755] print_address_description.constprop.4+0x1f/0x300
|
|
|
2de9d45 |
[24.751562] Key type .fscrypt registered
|
|
|
2de9d45 |
[24.754370] __kasan_report.cold.8+0x76/0xb2
|
|
|
2de9d45 |
[24.754388] ? __kmemleak_do_cleanup+0x166/0x180
|
|
|
2de9d45 |
[24.754407] kasan_report+0xe/0x20
|
|
|
2de9d45 |
[24.778543] __kmemleak_do_cleanup+0x166/0x180
|
|
|
2de9d45 |
[24.780795] process_one_work+0x919/0x17d0
|
|
|
2de9d45 |
[24.782929] ? pwq_dec_nr_in_flight+0x320/0x320
|
|
|
2de9d45 |
[24.785092] worker_thread+0x87/0xb40
|
|
|
2de9d45 |
[24.786948] ? __kthread_parkme+0xc3/0x190
|
|
|
2de9d45 |
[24.789217] ? process_one_work+0x17d0/0x17d0
|
|
|
2de9d45 |
[24.791414] kthread+0x333/0x3f0
|
|
|
2de9d45 |
[24.793031] ? kthread_create_worker_on_cpu+0xc0/0xc0
|
|
|
2de9d45 |
[24.795473] ret_from_fork+0x3a/0x50
|
|
|
2de9d45 |
[24.797303]
|
|
|
2de9d45 |
[24.798091] The buggy address belongs to the variable:
|
|
|
2de9d45 |
[24.800634] mem_pool_free_count+0x10/0x40
|
|
|
2de9d45 |
[24.802656]
|
|
|
2de9d45 |
[24.803434] Memory state around the buggy address:
|
|
|
2de9d45 |
[24.805793] ffffffff88746b80: 04 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
|
|
|
2de9d45 |
[24.809177] ffffffff88746c00: 00 fa fa fa fa fa fa fa 00 00 fa fa fa fa fa fa
|
|
|
2de9d45 |
[24.812407] >ffffffff88746c80: 04 fa fa fa fa fa fa fa 00 00 fa fa fa fa fa fa
|
|
|
2de9d45 |
[24.815638] ^
|
|
|
2de9d45 |
[24.817372] ffffffff88746d00: 00 00 fa fa fa fa fa fa 00 00 00 00 00 00 00 00
|
|
|
2de9d45 |
[24.820740] ffffffff88746d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
|
2de9d45 |
[24.824021] ==================================================================
|
|
|
2de9d45 |
|
|
|
2de9d45 |
Fixes: c5665868183f ("mm: kmemleak: use the memory pool for early allocations")
|
|
|
2de9d45 |
Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com>
|
|
|
2de9d45 |
---
|
|
|
2de9d45 |
mm/kmemleak.c | 5 +++++
|
|
|
2de9d45 |
1 file changed, 5 insertions(+)
|
|
|
2de9d45 |
|
|
|
2de9d45 |
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
|
|
|
2de9d45 |
index 03a8d84badad..b9baf617fe35 100644
|
|
|
2de9d45 |
--- a/mm/kmemleak.c
|
|
|
2de9d45 |
+++ b/mm/kmemleak.c
|
|
|
2de9d45 |
@@ -1946,6 +1946,11 @@ void __init kmemleak_init(void)
|
|
|
2de9d45 |
*/
|
|
|
2de9d45 |
static int __init kmemleak_late_init(void)
|
|
|
2de9d45 |
{
|
|
|
2de9d45 |
+ if (!kmemleak_skip_disable) {
|
|
|
2de9d45 |
+ kmemleak_disable();
|
|
|
2de9d45 |
+ return 0;
|
|
|
2de9d45 |
+ }
|
|
|
2de9d45 |
+
|
|
|
2de9d45 |
kmemleak_initialized = 1;
|
|
|
2de9d45 |
|
|
|
2de9d45 |
debugfs_create_file("kmemleak", 0644, NULL, NULL, &kmemleak_fops);
|
|
|
2de9d45 |
--
|
|
|
2de9d45 |
2.21.0
|
|
|
2de9d45 |
|