==================================================================
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 ffff8881c0b671c8 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.197-syzkaller-00011-gf3665979a8e7 #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:ffff8881f5defe88 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f5dc4ec0 RCX: ffff8881f5dc4ec0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff821c7a14 R09: ffffed103ebb89d9
R10: ffffed103ebb89d9 R11: 1ffff1103ebb89d8 R12: 0000000000000000
R13: 1ffff1103ebb89d8 R14: ffffffff85e6c3a0 R15: 0000000000000001
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_secondary+0x312/0x390 arch/x86/kernel/smpboot.c:264
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
The buggy address belongs to the page:
page:ffffea000702d9c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea000702d988 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x146dc0(GFP_USER|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP|__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
__alloc_pages include/linux/gfp.h:503 [inline]
__alloc_pages_node include/linux/gfp.h:516 [inline]
alloc_pages_node include/linux/gfp.h:530 [inline]
kmalloc_order mm/slab_common.c:1342 [inline]
kmalloc_order_trace+0x2a/0xf0 mm/slab_common.c:1358
__kmalloc_node include/linux/slab.h:422 [inline]
kmalloc_node include/linux/slab.h:599 [inline]
kvmalloc_node+0x7e/0xf0 mm/util.c:564
kvmalloc include/linux/mm.h:758 [inline]
kvzalloc include/linux/mm.h:766 [inline]
alloc_netdev_mqs+0x86/0xc30 net/core/dev.c:9597
tun_set_iff+0x4f9/0x1050 drivers/net/tun.c:2814
__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
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
netdev_run_todo+0xae7/0xc80 net/core/dev.c:9456
tun_detach drivers/net/tun.c:751 [inline]
tun_chr_close+0xc0/0xd0 drivers/net/tun.c:3523
__fput+0x261/0x680 fs/file_table.c:281
task_work_run+0x186/0x1b0 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xbe1/0x2b40 kernel/exit.c:812
do_group_exit+0x136/0x300 kernel/exit.c:910
get_signal+0xd99/0x13f0 kernel/signal.c:2735
do_signal+0x3b/0x540 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0xdd/0x1d0 arch/x86/entry/common.c:159
prepare_exit_to_usermode+0x17c/0x1d0 arch/x86/entry/common.c:194
ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:344
Memory state around the buggy address:
ffff8881c0b67080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881c0b67100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881c0b67180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881c0b67200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881c0b67280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.4.197-syzkaller-00011-gf3665979a8e7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:__hlist_del include/linux/list.h:773 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers+0x146/0x400 kernel/time/timer.c:1452
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 62 21 3b 00 4d 89 3e 4d 85 ff 74 2a e8 95 b7 0e 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 3b 21 3b 00 4d 89 37 eb 0b 66 0f
RSP: 0018:ffff8881f6f09d78 EFLAGS: 00010802
RAX: 1bd5a00000000025 RBX: ffff8881c0b671c0 RCX: ffff8881f5dc4ec0
RDX: 0000000080000102 RSI: 0000000000000008 RDI: ffff8881c0b671c8
RBP: 1ffff1103816ce39 R08: ffffffff81519c11 R09: ffffed103ede92f8
R10: ffffed103ede92f8 R11: 1ffff1103ede92f7 R12: ffff8881c0b671c8
R13: dffffc0000000000 R14: ffff8881f6f09e60 R15: dead00000000012a
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffd549a528 CR3: 00000001c78b0000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__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:ffff8881f5defe88 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f5dc4ec0 RCX: ffff8881f5dc4ec0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff821c7a14 R09: ffffed103ebb89d9
R10: ffffed103ebb89d9 R11: 1ffff1103ebb89d8 R12: 0000000000000000
R13: 1ffff1103ebb89d8 R14: ffffffff85e6c3a0 R15: 0000000000000001
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_secondary+0x312/0x390 arch/x86/kernel/smpboot.c:264
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Modules linked in:
---[ end trace 6ac8d76519a5785c ]---
RIP: 0010:__hlist_del include/linux/list.h:773 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers+0x146/0x400 kernel/time/timer.c:1452
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 62 21 3b 00 4d 89 3e 4d 85 ff 74 2a e8 95 b7 0e 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 3b 21 3b 00 4d 89 37 eb 0b 66 0f
RSP: 0018:ffff8881f6f09d78 EFLAGS: 00010802
RAX: 1bd5a00000000025 RBX: ffff8881c0b671c0 RCX: ffff8881f5dc4ec0
RDX: 0000000080000102 RSI: 0000000000000008 RDI: ffff8881c0b671c8
RBP: 1ffff1103816ce39 R08: ffffffff81519c11 R09: ffffed103ede92f8
R10: ffffed103ede92f8 R11: 1ffff1103ede92f7 R12: ffff8881c0b671c8
R13: dffffc0000000000 R14: ffff8881f6f09e60 R15: dead00000000012a
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffd549a528 CR3: 00000001c78b0000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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