KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range

KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_start
Status: auto-closed as invalid on 2020/02/01 21:57
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 702d, last: 673d

similar bugs (4):
Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_start (2)	5	491d	597d	0/22	closed as invalid on 2020/06/18 14:24
upstream	KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_start (3)	4	426d	465d	0/22	auto-closed as invalid on 2020/08/31 17:17
upstream	KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_start (4)	1	391d	391d	0/22	auto-closed as invalid on 2020/10/06 00:28
upstream	KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_start (5)	17	166d	294d	0/22	auto-closed as invalid on 2021/05/19 10:43

Sample crash report:

==================================================================
BUG: KCSAN: data-race in kvm_mmu_notifier_invalidate_range_end / kvm_mmu_notifier_invalidate_range_start

write to 0xffffc90014eee158 of 8 bytes by task 31559 on cpu 0:
 kvm_mmu_notifier_invalidate_range_start+0x6b/0x170 arch/x86/kvm/../../../virt/kvm/kvm_main.c:404
 __mmu_notifier_invalidate_range_start+0xc8/0x170 mm/mmu_notifier.c:175
 mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:351 [inline]
 mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:344 [inline]
 wp_page_copy+0xe1a/0x1120 mm/memory.c:2341
 do_wp_page+0x192/0x11f0 mm/memory.c:2628
 handle_pte_fault mm/memory.c:3865 [inline]
 __handle_mm_fault+0x1ab1/0x2c70 mm/memory.c:3973
 handle_mm_fault+0x21b/0x530 mm/memory.c:4010
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202

read to 0xffffc90014eee158 of 8 bytes by task 31553 on cpu 1:
 kvm_mmu_notifier_invalidate_range_end+0x7b/0xb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:443
 __mmu_notifier_invalidate_range_end+0x144/0x1e0 mm/mmu_notifier.c:222
 mmu_notifier_invalidate_range_only_end include/linux/mmu_notifier.h:384 [inline]
 wp_page_copy+0x1023/0x1120 mm/memory.c:2418
 do_wp_page+0x192/0x11f0 mm/memory.c:2628
 handle_pte_fault mm/memory.c:3865 [inline]
 __handle_mm_fault+0x1ab1/0x2c70 mm/memory.c:3973
 handle_mm_fault+0x21b/0x530 mm/memory.c:4010
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31553 Comm: syz-executor.4 Not tainted 5.4.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (7):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report
ci2-upstream-kcsan-gce	2019/11/23 21:57	https://github.com/google/ktsan.git kcsan	5863cc791e4c	598ca6c8	.config	log	report
ci2-upstream-kcsan-gce	2019/11/18 05:08	https://github.com/google/ktsan.git kcsan	5863cc791e4c	d5696d51	.config	log	report
ci2-upstream-kcsan-gce	2019/11/07 17:46	https://github.com/google/ktsan.git kcsan	94c006602e13	f39aff9e	.config	log	report
ci2-upstream-kcsan-gce	2019/11/06 04:12	https://github.com/google/ktsan.git kcsan	94c006602e13	bc2c6e45	.config	log	report
ci2-upstream-kcsan-gce	2019/11/03 00:35	https://github.com/google/ktsan.git kcsan	05f2236801fe	d603afc9	.config	log	report
ci2-upstream-kcsan-gce	2019/10/26 03:16	https://github.com/google/ktsan.git kcsan	05f2236801fe	413926c5	.config	log	report
ci2-upstream-kcsan-gce	2019/10/25 18:54	https://github.com/google/ktsan.git kcsan	05f2236801fe	04ca72cd	.config	log	report