==================================================================
BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:791 [inline]
BUG: KASAN: use-after-free in detach_timer kernel/time/timer.c:824 [inline]
BUG: KASAN: use-after-free in expire_timers kernel/time/timer.c:1482 [inline]
BUG: KASAN: use-after-free in __run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
Write of size 8 at addr ffff8881d82ef1c8 by task kworker/0:30/2672
CPU: 0 PID: 2672 Comm: kworker/0:30 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: rcu_gp process_srcu
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
__hlist_del include/linux/list.h:791 [inline]
detach_timer kernel/time/timer.c:824 [inline]
expire_timers kernel/time/timer.c:1482 [inline]
__run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
__do_softirq+0x23b/0x6b7 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:539 [inline]
smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:preempt_count_add+0x0/0x180 kernel/sched/core.c:4003
Code: 4f 00 e9 29 ff ff ff 48 c7 c7 e0 a7 ed 85 48 89 de e8 84 e5 03 01 e9 22 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <41> 57 41 56 53 89 fb 48 c7 c0 c0 49 eb 86 48 c1 e8 03 49 bf 00 00
RSP: 0018:ffff8881d42efbe0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000000 RBX: 00000103c84b7611 RCX: 0000000000000001
RDX: 0000000000000103 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 000000000000003b R08: ffffffff8231cd01 R09: ffffed103a85df81
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000db1e
R13: 1ffffffff0c989d1 R14: 0000000000002af9 R15: 0000000000000000
delay_tsc+0x62/0xd0 arch/x86/lib/delay.c:68
try_check_zero+0x2f2/0x360 kernel/rcu/srcutree.c:708
srcu_advance_state kernel/rcu/srcutree.c:1146 [inline]
process_srcu+0x1ab/0xc40 kernel/rcu/srcutree.c:1241
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
The buggy address belongs to the page:
page:ffffea000760bbc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea000760bb88 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+0x18f/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
__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/0x100 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:596
kvmalloc include/linux/mm.h:761 [inline]
kvzalloc include/linux/mm.h:769 [inline]
alloc_netdev_mqs+0x85/0xc70 net/core/dev.c:9629
tun_set_iff+0x51f/0xdc0 drivers/net/tun.c:2893
__tun_chr_ioctl+0x8a9/0x1d00 drivers/net/tun.c:3187
do_vfs_ioctl+0x742/0x1720 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+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
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+0x847/0x950 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4955 [inline]
__free_pages+0x91/0x140 mm/page_alloc.c:4961
device_release+0x6b/0x190 drivers/base/core.c:1776
kobject_cleanup lib/kobject.c:716 [inline]
kobject_release lib/kobject.c:747 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e6/0x2f0 lib/kobject.c:764
netdev_run_todo+0xc44/0xdf0 net/core/dev.c:9488
tun_detach drivers/net/tun.c:766 [inline]
tun_chr_close+0xc1/0x130 drivers/net/tun.c:3563
__fput+0x262/0x680 fs/file_table.c:281
task_work_run+0x140/0x170 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xcaf/0x2bc0 kernel/exit.c:861
do_group_exit+0x138/0x300 kernel/exit.c:984
get_signal+0xdb1/0x1440 kernel/signal.c:2738
do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:346
Memory state around the buggy address:
ffff8881d82ef080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881d82ef100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881d82ef180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881d82ef200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881d82ef280: 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: 0 PID: 2672 Comm: kworker/0:30 Tainted: G B 5.4.290-syzkaller-00017-g6b07fcd94a6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: rcu_gp process_srcu
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x7b0/0xbe0 kernel/time/timer.c:1817
Code: 89 e7 e8 63 51 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 a5 66 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 32 51 3f 00 4d 89 65 00 eb 05 e8 77
RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010802
RAX: 1bd5a00000000025 RBX: 1ffff1103b05de39 RCX: dffffc0000000000
RDX: 0000000000000101 RSI: 0000000000000008 RDI: ffff8881d82ef1c8
RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e28
R13: dead00000000012a R14: 1ffff1103b05de38 R15: ffff8881d82ef1c8
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555895a4a8 CR3: 00000001ec7d9000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
__do_softirq+0x23b/0x6b7 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:539 [inline]
smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:preempt_count_add+0x0/0x180 kernel/sched/core.c:4003
Code: 4f 00 e9 29 ff ff ff 48 c7 c7 e0 a7 ed 85 48 89 de e8 84 e5 03 01 e9 22 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <41> 57 41 56 53 89 fb 48 c7 c0 c0 49 eb 86 48 c1 e8 03 49 bf 00 00
RSP: 0018:ffff8881d42efbe0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000000 RBX: 00000103c84b7611 RCX: 0000000000000001
RDX: 0000000000000103 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 000000000000003b R08: ffffffff8231cd01 R09: ffffed103a85df81
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000db1e
R13: 1ffffffff0c989d1 R14: 0000000000002af9 R15: 0000000000000000
delay_tsc+0x62/0xd0 arch/x86/lib/delay.c:68
try_check_zero+0x2f2/0x360 kernel/rcu/srcutree.c:708
srcu_advance_state kernel/rcu/srcutree.c:1146 [inline]
process_srcu+0x1ab/0xc40 kernel/rcu/srcutree.c:1241
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
---[ end trace a4620414b6faaa4e ]---
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x7b0/0xbe0 kernel/time/timer.c:1817
Code: 89 e7 e8 63 51 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 a5 66 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 32 51 3f 00 4d 89 65 00 eb 05 e8 77
RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010802
RAX: 1bd5a00000000025 RBX: 1ffff1103b05de39 RCX: dffffc0000000000
RDX: 0000000000000101 RSI: 0000000000000008 RDI: ffff8881d82ef1c8
RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e28
R13: dead00000000012a R14: 1ffff1103b05de38 R15: ffff8881d82ef1c8
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555895a4a8 CR3: 00000001ec7d9000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess), 2 bytes skipped:
0: e9 29 ff ff ff jmp 0xffffff2e
5: 48 c7 c7 e0 a7 ed 85 mov $0xffffffff85eda7e0,%rdi
c: 48 89 de mov %rbx,%rsi
f: e8 84 e5 03 01 call 0x103e598
14: e9 22 ff ff ff jmp 0xffffff3b
19: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
20: 00 00 00 00
24: 0f 1f 40 00 nopl 0x0(%rax)
* 28: 41 57 push %r15 <-- trapping instruction
2a: 41 56 push %r14
2c: 53 push %rbx
2d: 89 fb mov %edi,%ebx
2f: 48 c7 c0 c0 49 eb 86 mov $0xffffffff86eb49c0,%rax
36: 48 c1 e8 03 shr $0x3,%rax
3a: 49 rex.WB
3b: bf .byte 0xbf