KMSAN: uninit-value in set_selection

KMSAN: uninit-value in set_selection_kernel
Status: upstream: reported on 2020/03/12 21:47
Reported-by: syzbot+0b81ae727db96ee52ca8@syzkaller.appspotmail.com
First crash: 687d, last: 9h45m

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KMSAN: kernel-infoleak in vcs_read (2)	C			621	22m	785d	0/22	upstream: reported C repro on 2019/12/04 15:25

Sample crash report:

=====================================================
BUG: KMSAN: uninit-value in vc_do_selection drivers/tty/vt/selection.c:243 [inline]
BUG: KMSAN: uninit-value in vc_selection drivers/tty/vt/selection.c:350 [inline]
BUG: KMSAN: uninit-value in set_selection_kernel+0x11eb/0x3ab0 drivers/tty/vt/selection.c:359
 vc_do_selection drivers/tty/vt/selection.c:243 [inline]
 vc_selection drivers/tty/vt/selection.c:350 [inline]
 set_selection_kernel+0x11eb/0x3ab0 drivers/tty/vt/selection.c:359
 set_selection_user+0x12a/0x170 drivers/tty/vt/selection.c:185
 tioclinux+0x263/0x960 drivers/tty/vt/vt.c:3200
 vt_ioctl+0x5cb/0x33a0 drivers/tty/vt/vt_ioctl.c:762
 vt_compat_ioctl+0x4d6/0xa50
 tty_compat_ioctl+0x6ac/0xb50 drivers/tty/tty_io.c:2984
 __do_compat_sys_ioctl fs/ioctl.c:972 [inline]
 __se_compat_sys_ioctl+0x876/0x1150 fs/ioctl.c:914
 __ia32_compat_sys_ioctl+0xd9/0x110 fs/ioctl.c:914
 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
 __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

Uninit was created at:
 __alloc_pages+0xbbf/0x1090 mm/page_alloc.c:5409
 __alloc_pages_bulk+0x364/0x28e0 mm/page_alloc.c:5332
 alloc_pages_bulk_array_mempolicy+0xc6b/0xfd0 mm/mempolicy.c:2286
 vm_area_alloc_pages mm/vmalloc.c:2880 [inline]
 __vmalloc_area_node mm/vmalloc.c:2970 [inline]
 __vmalloc_node_range+0xa44/0x17b0 mm/vmalloc.c:3081
 __vmalloc_node mm/vmalloc.c:3130 [inline]
 vmalloc+0xe0/0xf0 mm/vmalloc.c:3163
 vc_uniscr_alloc drivers/tty/vt/vt.c:347 [inline]
 vc_do_resize+0x8d8/0x32a0 drivers/tty/vt/vt.c:1249
 vc_resize+0xc3/0xe0 drivers/tty/vt/vt.c:1362
 vt_resizex+0x917/0xad0 drivers/tty/vt/vt_ioctl.c:718
 vt_ioctl+0x1d16/0x33a0 drivers/tty/vt/vt_ioctl.c:936
 vt_compat_ioctl+0x4d6/0xa50
 tty_compat_ioctl+0x6ac/0xb50 drivers/tty/tty_io.c:2984
 __do_compat_sys_ioctl fs/ioctl.c:972 [inline]
 __se_compat_sys_ioctl+0x876/0x1150 fs/ioctl.c:914
 __ia32_compat_sys_ioctl+0xd9/0x110 fs/ioctl.c:914
 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
 __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

CPU: 1 PID: 28594 Comm: syz-executor.2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================

Crashes (317):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kmsan-gce-386	2022/01/27 19:36	https://github.com/google/kmsan.git master	85cfd6e539bd	64a8e201	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/27 10:24	https://github.com/google/kmsan.git master	85cfd6e539bd	2cbffd88	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/25 23:05	https://github.com/google/kmsan.git master	85cfd6e539bd	2cbffd88	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/24 03:34	https://github.com/google/kmsan.git master	85cfd6e539bd	214351e1	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/22 03:06	https://github.com/google/kmsan.git master	85cfd6e539bd	214351e1	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/20 01:34	https://github.com/google/kmsan.git master	fa3879a274df	5da9499f	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/19 14:32	https://github.com/google/kmsan.git master	fa3879a274df	0620189b	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/17 13:33	https://github.com/google/kmsan.git master	fa3879a274df	731a2d23	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/14 02:21	https://github.com/google/kmsan.git master	fa3879a274df	b8d780ab	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/13 07:27	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/11 18:31	https://github.com/google/kmsan.git master	fa3879a274df	1884f55a	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/10 23:13	https://github.com/google/kmsan.git master	81c325bbf94e	ddb0ab8c	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/08 10:11	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/07 20:23	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/05 23:36	https://github.com/google/kmsan.git master	81c325bbf94e	6acc789a	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/05 05:35	https://github.com/google/kmsan.git master	81c325bbf94e	0a2584dd	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/04 12:25	https://github.com/google/kmsan.git master	81c325bbf94e	7f723fbe	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/04 08:15	https://github.com/google/kmsan.git master	81c325bbf94e	7f723fbe	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2022/01/01 20:06	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/31 22:59	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/31 21:05	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/28 14:51	https://github.com/google/kmsan.git master	81c325bbf94e	6b3c5e64	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/28 06:10	https://github.com/google/kmsan.git master	81c325bbf94e	6b3c5e64	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/26 17:21	https://github.com/google/kmsan.git master	81c325bbf94e	e4f103c4	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/26 15:19	https://github.com/google/kmsan.git master	81c325bbf94e	e4f103c4	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/22 06:07	https://github.com/google/kmsan.git master	81c325bbf94e	6caa12e4	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/21 23:11	https://github.com/google/kmsan.git master	81c325bbf94e	a938f0b8	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/21 12:49	https://github.com/google/kmsan.git master	81c325bbf94e	a938f0b8	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/20 12:20	https://github.com/google/kmsan.git master	b0a8b5053e8b	021b36cb	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/18 05:29	https://github.com/google/kmsan.git master	b0a8b5053e8b	44068e19	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/17 20:39	https://github.com/google/kmsan.git master	b0a8b5053e8b	44068e19	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/15 11:30	https://github.com/google/kmsan.git master	d1daf229a313	f752fb53	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/14 23:45	https://github.com/google/kmsan.git master	b1e1bb6f7a2e	d018dd31	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/14 17:19	https://github.com/google/kmsan.git master	b1e1bb6f7a2e	d018dd31	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/13 14:01	https://github.com/google/kmsan.git master	8b936c96768e	49ca1f59	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/10 20:33	https://github.com/google/kmsan.git master	8b936c96768e	49ca1f59	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/10 07:54	https://github.com/google/kmsan.git master	8b936c96768e	4d4ce9bc	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/08 19:05	https://github.com/google/kmsan.git master	8b936c96768e	a4a2a501	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/04 06:11	https://github.com/google/kmsan.git master	b0f85c4ccdd4	a617004c	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/12/02 05:17	https://github.com/google/kmsan.git master	a535b0caaa2f	61f86278	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/30 08:48	https://github.com/google/kmsan.git master	a535b0caaa2f	d0830353	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/29 23:49	https://github.com/google/kmsan.git master	a535b0caaa2f	d0830353	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/26 04:38	https://github.com/google/kmsan.git master	a535b0caaa2f	63eeac02	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/25 08:33	https://github.com/google/kmsan.git master	b05f62d953b9	545ab074	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/24 04:19	https://github.com/google/kmsan.git master	7ca3114e5a48	545ab074	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/17 07:30	https://github.com/google/kmsan.git master	6a4b0eb32d37	cafff8b6	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/11/16 20:01	https://github.com/google/kmsan.git master	386004877847	600426bd	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/08/06 13:20	https://github.com/google/kmsan.git master	ee9407ea37bf	f9e341e3	.config	log	report	info	KMSAN: uninit-value in set_selection_kernel
ci-upstream-kmsan-gce-386	2021/01/14 10:24	https://github.com/google/kmsan.git master	73d62e81b476	269d24e8	.config	log	report	info
ci-upstream-kmsan-gce-386	2020/03/12 09:01	https://github.com/google/kmsan.git master	8bbbc5cf3dca	d850e9d0	.config	log	report
ci-upstream-kmsan-gce-386	2020/03/11 16:35	https://github.com/google/kmsan.git master	8bbbc5cf3dca	e7caca8e	.config	log	report