==================================================================
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 ffff8881ee9ef1c8 by task kworker/u4:4/435
CPU: 0 PID: 435 Comm: kworker/u4:4 Not tainted 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound linkwatch_event
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:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:console_unlock+0xa62/0xfa0 kernel/printk/printk.c:2527
Code: 03 84 db 4c 8d ac 24 00 01 00 00 0f 85 13 05 00 00 e8 e2 e2 16 00 e8 5d 5f 00 00 48 8b 44 24 20 48 89 44 24 70 ff 74 24 70 9d 99 f7 ff ff e8 c4 e2 16 00 48 c7 05 09 16 a0 05 00 00 00 00 e9
RSP: 0018:ffff8881d3a0f740 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 0000000000000000 RCX: ffff8881edf15e80
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8881d3a0f8f0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881d3a0f840 R14: 0000000000000000 R15: ffffffff812ee850
vprintk_emit+0x1e0/0x3f0 kernel/printk/printk.c:2032
printk+0xd1/0x111 kernel/printk/printk.c:2092
addrconf_notify+0x943/0xe50 net/ipv6/addrconf.c:3638
notifier_call_chain kernel/notifier.c:98 [inline]
__raw_notifier_call_chain kernel/notifier.c:399 [inline]
raw_notifier_call_chain+0x95/0x110 kernel/notifier.c:406
call_netdevice_notifiers_info net/core/dev.c:1670 [inline]
netdev_state_change+0x146/0x1e0 net/core/dev.c:1273
linkwatch_do_dev+0xfc/0x130 net/core/link_watch.c:159
__linkwatch_run_queue+0x4cc/0x7f0 net/core/link_watch.c:205
linkwatch_event+0x48/0x50 net/core/link_watch.c:244
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
process_scheduled_works kernel/workqueue.c:2352 [inline]
worker_thread+0xe02/0x1470 kernel/workqueue.c:2438
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:ffffea0007ba7bc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea0007ba7b88 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 0x152dc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__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]
bpf_check+0xf4/0xb3e0 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+0x8aeb/0xb3e0 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:
ffff8881ee9ef080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ee9ef100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ee9ef180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881ee9ef200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ee9ef280: 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 1c38a6067 P4D 1c38a6067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 435 Comm: kworker/u4:4 Tainted: G B 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound linkwatch_event
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154e8aa RBX: 0000000000000101 RCX: ffff8881edf15e80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ee9ef1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154e4ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000100001b00
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ee9ef1c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001b859c000 CR4: 00000000003406b0
DR0: 0000400000000300 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: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:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:console_unlock+0xa62/0xfa0 kernel/printk/printk.c:2527
Code: 03 84 db 4c 8d ac 24 00 01 00 00 0f 85 13 05 00 00 e8 e2 e2 16 00 e8 5d 5f 00 00 48 8b 44 24 20 48 89 44 24 70 ff 74 24 70 9d 99 f7 ff ff e8 c4 e2 16 00 48 c7 05 09 16 a0 05 00 00 00 00 e9
RSP: 0018:ffff8881d3a0f740 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: 0000000000000000 RCX: ffff8881edf15e80
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8881d3a0f8f0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881d3a0f840 R14: 0000000000000000 R15: ffffffff812ee850
vprintk_emit+0x1e0/0x3f0 kernel/printk/printk.c:2032
printk+0xd1/0x111 kernel/printk/printk.c:2092
addrconf_notify+0x943/0xe50 net/ipv6/addrconf.c:3638
notifier_call_chain kernel/notifier.c:98 [inline]
__raw_notifier_call_chain kernel/notifier.c:399 [inline]
raw_notifier_call_chain+0x95/0x110 kernel/notifier.c:406
call_netdevice_notifiers_info net/core/dev.c:1670 [inline]
netdev_state_change+0x146/0x1e0 net/core/dev.c:1273
linkwatch_do_dev+0xfc/0x130 net/core/link_watch.c:159
__linkwatch_run_queue+0x4cc/0x7f0 net/core/link_watch.c:205
linkwatch_event+0x48/0x50 net/core/link_watch.c:244
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
process_scheduled_works kernel/workqueue.c:2352 [inline]
worker_thread+0xe02/0x1470 kernel/workqueue.c:2438
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
CR2: 0000000000000000
---[ end trace 042af25e740d62d4 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154e8aa RBX: 0000000000000101 RCX: ffff8881edf15e80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ee9ef1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154e4ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000100001b00
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ee9ef1c0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001b859c000 CR4: 00000000003406b0
DR0: 0000400000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 03 84 db 4c 8d ac 24 add 0x24ac8d4c(%rbx,%rbx,8),%eax
7: 00 01 add %al,(%rcx)
9: 00 00 add %al,(%rax)
b: 0f 85 13 05 00 00 jne 0x524
11: e8 e2 e2 16 00 call 0x16e2f8
16: e8 5d 5f 00 00 call 0x5f78
1b: 48 8b 44 24 20 mov 0x20(%rsp),%rax
20: 48 89 44 24 70 mov %rax,0x70(%rsp)
25: ff 74 24 70 push 0x70(%rsp)
29: 9d popf
* 2a: e9 99 f7 ff ff jmp 0xfffff7c8 <-- trapping instruction
2f: e8 c4 e2 16 00 call 0x16e2f8
34: 48 c7 05 09 16 a0 05 movq $0x0,0x5a01609(%rip) # 0x5a01648
3b: 00 00 00 00
3f: e9 .byte 0xe9