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authorJeremy Cline <jcline@redhat.com>2020-04-23 16:47:21 -0400
committerJeremy Cline <jcline@redhat.com>2020-04-23 16:47:21 -0400
commitd1b6f8c7af0eb9a0a44b2d4723e58dde5eafa236 (patch)
tree842b7a6410c2572bc8c1643196f83d2e19d80e1e /0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch
parent4f478aae8055f932b9a8fdd88d93db6b9da5709e (diff)
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kernel-5.7.0-0.rc2.20200423git7adc4b399952.1
* Thu Apr 23 2020 CKI@GitLab <cki-project@redhat.com> [5.7.0-0.rc2.20200423git7adc4b399952.1] - 7adc4b399952 rebase - Match template format in kernel.spec.template ("Justin M. Forbes") - Break out the Patches into individual files for dist-git ("Justin M. Forbes") - Break the Red Hat patch into individual commits (Jeremy Cline) - Adjust module filtering so CONFIG_DRM_DP_CEC can be set (Jeremy Cline) - Add a script to generate release tags and branches (Jeremy Cline) - Set CONFIG_VDPA for fedora ("Justin M. Forbes") - Provide defaults in ark-rebase-patches.sh (Jeremy Cline) - Default ark-rebase-patches.sh to not report issues (Jeremy Cline) Resolves: rhbz# Signed-off-by: Jeremy Cline <jcline@redhat.com>
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.patch71
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..568dafb7c
--- /dev/null
+++ b/0001-mm-kmemleak-skip-late_init-if-not-skip-disable.patch
@@ -0,0 +1,71 @@
+From c781d5feeecf6dff4e0d424df5d88660e00aeb8d 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 e362dc3d2028..0c3dfb8eef67 100644
+--- a/mm/kmemleak.c
++++ b/mm/kmemleak.c
+@@ -1958,6 +1958,11 @@ 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);
+--
+2.26.0
+