==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:852 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1484 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1719 [inline]
BUG: KASAN: use-after-free in __run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
Write of size 8 at addr ffff8881e1dff1c8 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.197-syzkaller-00005-g704c7d053806 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18e/0x1d5 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
hlist_move_list include/linux/list.h:852 [inline]
__collect_expired_timers kernel/time/timer.c:1484 [inline]
collect_expired_timers kernel/time/timer.c:1719 [inline]
__run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:538 [inline]
smp_apic_timer_interrupt+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: 90 90 90 90 90 90 90 90 90 90 90 e8 3b 25 ff fd bf 01 00 00 00 89 c6 e8 bf ae 09 fd e9 07 00 00 00 0f 00 2d 53 f8 47 00 fb f4 1c 25 ff fd bf ff ff ff ff 89 c6 e9 a0 ae 09 fd 41 57 41 56 53
RSP: 0018:ffffffff85807e88 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffffff85818a00 RCX: ffffffff85818a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff821c7a14 R09: fffffbfff0b03141
R10: fffffbfff0b03141 R11: 1ffffffff0b03140 R12: 0000000000000000
R13: 1ffffffff0b03140 R14: ffffffff85e6c3a0 R15: 0000000000000000
default_idle_call kernel/sched/idle.c:94 [inline]
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x1d2/0x590 kernel/sched/idle.c:264
cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:356
start_kernel+0x6d4/0x77f init/main.c:1049
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
The buggy address belongs to the page:
page:ffffea0007877fc0 refcount:3 mapcount:2 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 0000000300000001 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x2ab/0x6f0 mm/page_alloc.c:4857
__vmalloc_area_node mm/vmalloc.c:2431 [inline]
__vmalloc_node_range+0x38f/0x730 mm/vmalloc.c:2499
vmalloc_user+0x70/0x80 mm/vmalloc.c:2629
kcov_mmap+0x28/0x130 kernel/kcov.c:450
call_mmap include/linux/fs.h:1981 [inline]
mmap_region+0x10d7/0x15d0 mm/mmap.c:1805
do_mmap+0x813/0xd30 mm/mmap.c:1578
do_mmap_pgoff include/linux/mm.h:2476 [inline]
vm_mmap_pgoff+0x16f/0x1f0 mm/util.c:496
ksys_mmap_pgoff+0x168/0x1e0 mm/mmap.c:1628
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x7ee/0x920 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4919 [inline]
__free_pages+0x45/0x1e0 mm/page_alloc.c:4925
kfree+0x1ef/0x260 mm/slub.c:4068
device_release+0x70/0x1a0 drivers/base/core.c:1776
kobject_cleanup lib/kobject.c:708 [inline]
kobject_release+0x1f3/0x3d0 lib/kobject.c:739
tun_set_iff+0xc0b/0x1050 drivers/net/tun.c:2906
__tun_chr_ioctl+0x6c7/0x1b70 drivers/net/tun.c:3149
do_vfs_ioctl+0x6d1/0x15b0 fs/ioctl.c:47
ksys_ioctl fs/ioctl.c:742 [inline]
__do_sys_ioctl fs/ioctl.c:749 [inline]
__se_sys_ioctl fs/ioctl.c:747 [inline]
__x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Memory state around the buggy address:
ffff8881e1dff080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881e1dff100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881e1dff180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff8881e1dff200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881e1dff280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 0 P4D 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 5.4.197-syzkaller-00005-g704c7d053806 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d30 EFLAGS: 00010202
RAX: ffffffff81519fb9 RBX: 0000000000000101 RCX: ffffffff85818a00
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e1dff1c0
RBP: ffff8881e1dff1e0 R08: ffffffff81519d92 R09: fffffbfff0d3170d
R10: fffffbfff0d3170d R11: 1ffffffff0d3170c R12: 00000000ffffc510
R13: 1ffff1103edc92f1 R14: 0000000000000000 R15: ffff8881e1dff1c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e6733000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
call_timer_fn+0x31/0x350 kernel/time/timer.c:1418
expire_timers+0x21e/0x400 kernel/time/timer.c:1463
__run_timers+0x5b0/0x6b0 kernel/time/timer.c:1787
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:538 [inline]
smp_apic_timer_interrupt+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: 90 90 90 90 90 90 90 90 90 90 90 e8 3b 25 ff fd bf 01 00 00 00 89 c6 e8 bf ae 09 fd e9 07 00 00 00 0f 00 2d 53 f8 47 00 fb f4 1c 25 ff fd bf ff ff ff ff 89 c6 e9 a0 ae 09 fd 41 57 41 56 53
RSP: 0018:ffffffff85807e88 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffffff85818a00 RCX: ffffffff85818a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff821c7a14 R09: fffffbfff0b03141
R10: fffffbfff0b03141 R11: 1ffffffff0b03140 R12: 0000000000000000
R13: 1ffffffff0b03140 R14: ffffffff85e6c3a0 R15: 0000000000000000
default_idle_call kernel/sched/idle.c:94 [inline]
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x1d2/0x590 kernel/sched/idle.c:264
cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:356
start_kernel+0x6d4/0x77f init/main.c:1049
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Modules linked in:
CR2: 0000000000000000
---[ end trace 84e7f5af57802c37 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d30 EFLAGS: 00010202
RAX: ffffffff81519fb9 RBX: 0000000000000101 RCX: ffffffff85818a00
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e1dff1c0
RBP: ffff8881e1dff1e0 R08: ffffffff81519d92 R09: fffffbfff0d3170d
R10: fffffbfff0d3170d R11: 1ffffffff0d3170c R12: 00000000ffffc510
R13: 1ffff1103edc92f1 R14: 0000000000000000 R15: ffff8881e1dff1c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e6733000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: e8 3b 25 ff fd callq 0xfdff254b
10: bf 01 00 00 00 mov $0x1,%edi
15: 89 c6 mov %eax,%esi
17: e8 bf ae 09 fd callq 0xfd09aedb
1c: e9 07 00 00 00 jmpq 0x28
21: 0f 00 2d 53 f8 47 00 verw 0x47f853(%rip) # 0x47f87b
28: fb sti
29: f4 hlt
* 2a: e8 1c 25 ff fd callq 0xfdff254b <-- trapping instruction
2f: bf ff ff ff ff mov $0xffffffff,%edi
34: 89 c6 mov %eax,%esi
36: e9 a0 ae 09 fd jmpq 0xfd09aedb
3b: 41 57 push %r15
3d: 41 56 push %r14
3f: 53 push %rbx