==================================================================
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 ffff8881db4931c8 by task syz-executor.0/2090
CPU: 0 PID: 2090 Comm: syz-executor.0 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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:538 [inline]
smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
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 3b eb 85 e8 ef 12 43 fd 48 83 3d 47 2d 9a 01 00 74 36 48 89 df e8 5d e8 fa fc 66 90 4c 89 34 24 ff 34 24 9d 01 00 00 00 e8 d9 d4 f3 fc 65 8b 05 1e 7f b1 7b 85 c0 74 08 48
RSP: 0018:ffff8881f3bd77a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881e11287dc RCX: dffffc0000000000
RDX: ffffc90001548000 RSI: 0000000000000246 RDI: ffff8881e11287dc
RBP: ffff8881f3bd7900 R08: ffffffff8166ea0a R09: fffffbfff0c96d7e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f6f57b40 R14: 0000000000000246 R15: 1ffff1103e77af08
try_to_wake_up+0x7ac/0x14f0 kernel/sched/core.c:2860
wake_up_process kernel/sched/core.c:2882 [inline]
wake_up_q+0x94/0xf0 kernel/sched/core.c:502
__mutex_unlock_slowpath+0x203/0x240 kernel/locking/mutex.c:1291
__rtnl_unlock+0x28/0x80 net/core/rtnetlink.c:98
netdev_run_todo+0x138/0xdf0 net/core/dev.c:9427
__tun_chr_ioctl+0xad4/0x1d00 drivers/net/tun.c:3456
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
RIP: 0033:0x7f0380b58ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f037fed30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0380c8ff80 RCX: 00007f0380b58ea9
RDX: 0000000020000180 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f0380bc7ff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0380c8ff80 R15: 00007fff182cd8e8
The buggy address belongs to the page:
page:ffffea00076d24c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea00074f5b08 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 0x140dc0(GFP_USER|__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_large include/linux/slab.h:485 [inline]
kmalloc include/linux/slab.h:549 [inline]
kzalloc include/linux/slab.h:690 [inline]
bpf_check+0xf6/0xb340 kernel/bpf/verifier.c:9561
bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
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
bpf_check+0x8aaa/0xb340 kernel/bpf/verifier.c:9731
bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881db493080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881db493100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881db493180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881db493200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881db493280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1cf820067 P4D 1cf820067 PUD 1d18ed067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2090 Comm: syz-executor.0 Tainted: G B 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881ddf2bf00
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881db4931c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa120
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881db4931c0
FS: 00007f037fed36c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebd65000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
expire_timers kernel/time/timer.c:1493 [inline]
__run_timers+0x879/0xbe0 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:538 [inline]
smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
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 3b eb 85 e8 ef 12 43 fd 48 83 3d 47 2d 9a 01 00 74 36 48 89 df e8 5d e8 fa fc 66 90 4c 89 34 24 ff 34 24 9d 01 00 00 00 e8 d9 d4 f3 fc 65 8b 05 1e 7f b1 7b 85 c0 74 08 48
RSP: 0018:ffff8881f3bd77a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881e11287dc RCX: dffffc0000000000
RDX: ffffc90001548000 RSI: 0000000000000246 RDI: ffff8881e11287dc
RBP: ffff8881f3bd7900 R08: ffffffff8166ea0a R09: fffffbfff0c96d7e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f6f57b40 R14: 0000000000000246 R15: 1ffff1103e77af08
try_to_wake_up+0x7ac/0x14f0 kernel/sched/core.c:2860
wake_up_process kernel/sched/core.c:2882 [inline]
wake_up_q+0x94/0xf0 kernel/sched/core.c:502
__mutex_unlock_slowpath+0x203/0x240 kernel/locking/mutex.c:1291
__rtnl_unlock+0x28/0x80 net/core/rtnetlink.c:98
netdev_run_todo+0x138/0xdf0 net/core/dev.c:9427
__tun_chr_ioctl+0xad4/0x1d00 drivers/net/tun.c:3456
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
RIP: 0033:0x7f0380b58ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f037fed30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0380c8ff80 RCX: 00007f0380b58ea9
RDX: 0000000020000180 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f0380bc7ff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0380c8ff80 R15: 00007fff182cd8e8
Modules linked in:
CR2: 0000000000000000
---[ end trace 74ee1f85156b258f ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000102 RCX: ffff8881ddf2bf00
RDX: 0000000000000102 RSI: 0000000000000000 RDI: ffff8881db4931c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa120
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881db4931c0
FS: 00007f037fed36c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebd65000 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 3b eb 85 mov $0xffffffff85eb3b90,%rdi
9: e8 ef 12 43 fd call 0xfd4312fd
e: 48 83 3d 47 2d 9a 01 cmpq $0x0,0x19a2d47(%rip) # 0x19a2d5d
15: 00
16: 74 36 je 0x4e
18: 48 89 df mov %rbx,%rdi
1b: e8 5d e8 fa fc call 0xfcfae87d
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 d9 d4 f3 fc call 0xfcf3d50d
34: 65 8b 05 1e 7f b1 7b mov %gs:0x7bb17f1e(%rip),%eax # 0x7bb17f59
3b: 85 c0 test %eax,%eax
3d: 74 08 je 0x47
3f: 48 rex.W