diff options
Diffstat (limited to '0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch')
| -rw-r--r-- | 0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch b/0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch new file mode 100644 index 000000000..e87612358 --- /dev/null +++ b/0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch @@ -0,0 +1,71 @@ +From 14d329da03ea1145efce866b127b10ea6390b5e1 Mon Sep 17 00:00:00 2001 +From: Murphy Zhou <jencce.kernel@gmail.com> +Date: Sun, 29 Sep 2019 17:56:59 +0800 +Subject: [PATCH] mm/kmemleak: skip late_init if not skip disable + +Now if DEFAULT_OFF set to y, kmemleak_init will start the cleanup_work +workqueue. Then late_init call will set kmemleak_initialized to 1, the +cleaup workqueue will try to do cleanup, triggering: + +[24.738773] ================================================================== +[24.742784] BUG: KASAN: global-out-of-bounds in __kmemleak_do_cleanup+0x166/0x180 +[24.744144] Key type ._fscrypt registered +[24.745680] Read of size 8 at addr ffffffff88746c90 by task kworker/3:1/171 +[24.745687] +[24.745697] CPU: 3 PID: 171 Comm: kworker/3:1 Not tainted 5.3.0-v5.3-12475-gcbafe18 #1 +[24.745701] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 +[24.745710] Workqueue: events kmemleak_do_cleanup +[24.745717] Call Trace: +[24.745736] dump_stack+0x7c/0xc0 +[24.745755] print_address_description.constprop.4+0x1f/0x300 +[24.751562] Key type .fscrypt registered +[24.754370] __kasan_report.cold.8+0x76/0xb2 +[24.754388] ? __kmemleak_do_cleanup+0x166/0x180 +[24.754407] kasan_report+0xe/0x20 +[24.778543] __kmemleak_do_cleanup+0x166/0x180 +[24.780795] process_one_work+0x919/0x17d0 +[24.782929] ? pwq_dec_nr_in_flight+0x320/0x320 +[24.785092] worker_thread+0x87/0xb40 +[24.786948] ? __kthread_parkme+0xc3/0x190 +[24.789217] ? process_one_work+0x17d0/0x17d0 +[24.791414] kthread+0x333/0x3f0 +[24.793031] ? kthread_create_worker_on_cpu+0xc0/0xc0 +[24.795473] ret_from_fork+0x3a/0x50 +[24.797303] +[24.798091] The buggy address belongs to the variable: +[24.800634] mem_pool_free_count+0x10/0x40 +[24.802656] +[24.803434] Memory state around the buggy address: +[24.805793] ffffffff88746b80: 04 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 +[24.809177] ffffffff88746c00: 00 fa fa fa fa fa fa fa 00 00 fa fa fa fa fa fa +[24.812407] >ffffffff88746c80: 04 fa fa fa fa fa fa fa 00 00 fa fa fa fa fa fa +[24.815638] ^ +[24.817372] ffffffff88746d00: 00 00 fa fa fa fa fa fa 00 00 00 00 00 00 00 00 +[24.820740] ffffffff88746d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 +[24.824021] ================================================================== + +Fixes: c5665868183f ("mm: kmemleak: use the memory pool for early allocations") +Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com> +--- + mm/kmemleak.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/mm/kmemleak.c b/mm/kmemleak.c +index 03a8d84badad..b9baf617fe35 100644 +--- a/mm/kmemleak.c ++++ b/mm/kmemleak.c +@@ -1946,6 +1946,11 @@ void __init kmemleak_init(void) + */ + static int __init kmemleak_late_init(void) + { ++ if (!kmemleak_skip_disable) { ++ kmemleak_disable(); ++ return 0; ++ } ++ + kmemleak_initialized = 1; + + debugfs_create_file("kmemleak", 0644, NULL, NULL, &kmemleak_fops); +-- +2.21.0 + |