==================================================================
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 ffff8881ec6c31c8 by task udevd/164
CPU: 0 PID: 164 Comm: udevd Not tainted 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x4d/0x80 kernel/locking/spinlock.c:191
Code: 74 0c 48 c7 c7 90 3c eb 85 e8 ff 03 3d fd 48 83 3d e7 0b 94 01 00 74 36 48 89 df e8 bd d6 f4 fc 66 90 4c 89 34 24 ff 34 24 9d 01 00 00 00 e8 f9 c0 ed fc 65 8b 05 be 5c ab 7b 85 c0 74 08 48
RSP: 0018:ffff8881ec1efcb8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881ee8f6900 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff8881ee8f6900
RBP: 0000000000000000 R08: ffffffff813e4370 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff1103d8b66d2
R13: ffff8881ec5b2f40 R14: 0000000000000246 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
unlock_task_sighand include/linux/sched/signal.h:715 [inline]
do_send_sig_info+0x106/0x130 kernel/signal.c:1292
____bpf_send_signal kernel/trace/bpf_trace.c:677 [inline]
bpf_send_signal+0x2a8/0x3b0 kernel/trace/bpf_trace.c:637
bpf_prog_8cc4ff36b5985b6a+0xf9f/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1341 [inline]
bpf_trace_run2+0x101/0x2d0 kernel/trace/bpf_trace.c:1379
trace_sys_exit include/trace/events/syscalls.h:44 [inline]
syscall_slow_exit_work+0x370/0x400 arch/x86/entry/common.c:234
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x19d/0x1c0 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f141bcc637f
Code: af 6a 0d 00 f7 d8 64 89 02 48 83 c8 ff 44 89 c7 48 89 04 24 e8 e1 fc f9 ff 48 8b 04 24 48 83 c4 28 c3 c3 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 7a 6a 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd1f89f988 EFLAGS: 00000206 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00005628509693f0 RCX: 00007f141bcc637f
RDX: 00000000000085b0 RSI: 0000562850932010 RDI: 000000000000000f
RBP: 00005628509a2a20 R08: 0000000000000000 R09: 00005628509502a0
R10: 0000000000000812 R11: 0000000000000206 R12: 00005628509502a0
R13: 00000000000000fd R14: 0000562827e931c4 R15: 0000000000000000
The buggy address belongs to the page:
page:ffffea0007b1b0c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea0007b1b0c8 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
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881ec6c3080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ec6c3100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ec6c3180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881ec6c3200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ec6c3280: 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: 164 Comm: udevd Tainted: G B 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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 f3 50 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 35 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 c2 50 3f 00 4d 89 65 00 eb 05 e8 07
RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010802
RAX: 1bd5a00000000025 RBX: 1ffff1103d8d8639 RCX: dffffc0000000000
RDX: 0000000000000104 RSI: 0000000000000008 RDI: ffff8881ec6c31c8
RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20
R13: dead00000000012a R14: 1ffff1103d8d8638 R15: ffff8881ec6c31c8
FS: 00007f141bb97c80(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffdfa50000 CR3: 00000001ecc79000 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x4d/0x80 kernel/locking/spinlock.c:191
Code: 74 0c 48 c7 c7 90 3c eb 85 e8 ff 03 3d fd 48 83 3d e7 0b 94 01 00 74 36 48 89 df e8 bd d6 f4 fc 66 90 4c 89 34 24 ff 34 24 9d 01 00 00 00 e8 f9 c0 ed fc 65 8b 05 be 5c ab 7b 85 c0 74 08 48
RSP: 0018:ffff8881ec1efcb8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881ee8f6900 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff8881ee8f6900
RBP: 0000000000000000 R08: ffffffff813e4370 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff1103d8b66d2
R13: ffff8881ec5b2f40 R14: 0000000000000246 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
unlock_task_sighand include/linux/sched/signal.h:715 [inline]
do_send_sig_info+0x106/0x130 kernel/signal.c:1292
____bpf_send_signal kernel/trace/bpf_trace.c:677 [inline]
bpf_send_signal+0x2a8/0x3b0 kernel/trace/bpf_trace.c:637
bpf_prog_8cc4ff36b5985b6a+0xf9f/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1341 [inline]
bpf_trace_run2+0x101/0x2d0 kernel/trace/bpf_trace.c:1379
trace_sys_exit include/trace/events/syscalls.h:44 [inline]
syscall_slow_exit_work+0x370/0x400 arch/x86/entry/common.c:234
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x19d/0x1c0 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f141bcc637f
Code: af 6a 0d 00 f7 d8 64 89 02 48 83 c8 ff 44 89 c7 48 89 04 24 e8 e1 fc f9 ff 48 8b 04 24 48 83 c4 28 c3 c3 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 7a 6a 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd1f89f988 EFLAGS: 00000206 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00005628509693f0 RCX: 00007f141bcc637f
RDX: 00000000000085b0 RSI: 0000562850932010 RDI: 000000000000000f
RBP: 00005628509a2a20 R08: 0000000000000000 R09: 00005628509502a0
R10: 0000000000000812 R11: 0000000000000206 R12: 00005628509502a0
R13: 00000000000000fd R14: 0000562827e931c4 R15: 0000000000000000
Modules linked in:
---[ end trace 9d7819214d319b21 ]---
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 f3 50 3f 00 4d 89 2c 24 4d 85 ed 74 2e e8 35 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 c2 50 3f 00 4d 89 65 00 eb 05 e8 07
RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010802
RAX: 1bd5a00000000025 RBX: 1ffff1103d8d8639 RCX: dffffc0000000000
RDX: 0000000000000104 RSI: 0000000000000008 RDI: ffff8881ec6c31c8
RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20
R13: dead00000000012a R14: 1ffff1103d8d8638 R15: ffff8881ec6c31c8
FS: 00007f141bb97c80(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffdfa50000 CR3: 00000001ecc79000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 74 0c je 0xe
2: 48 c7 c7 90 3c eb 85 mov $0xffffffff85eb3c90,%rdi
9: e8 ff 03 3d fd call 0xfd3d040d
e: 48 83 3d e7 0b 94 01 cmpq $0x0,0x1940be7(%rip) # 0x1940bfd
15: 00
16: 74 36 je 0x4e
18: 48 89 df mov %rbx,%rdi
1b: e8 bd d6 f4 fc call 0xfcf4d6dd
20: 66 90 xchg %ax,%ax
22: 4c 89 34 24 mov %r14,(%rsp)
26: ff 34 24 push (%rsp)
29: 9d popf
* 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction
2f: e8 f9 c0 ed fc call 0xfcedc12d
34: 65 8b 05 be 5c ab 7b mov %gs:0x7bab5cbe(%rip),%eax # 0x7bab5cf9
3b: 85 c0 test %eax,%eax
3d: 74 08 je 0x47
3f: 48 rex.W