==================================================================
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 ffff8881e1bd71c8 by task udevd/161
CPU: 0 PID: 161 Comm: udevd Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #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_read_unlock_irqrestore include/linux/rwlock_api_smp.h:236 [inline]
RIP: 0010:_raw_read_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:263
Code: 00 00 00 00 00 41 56 53 50 49 89 f6 48 89 fb be 04 00 00 00 e8 ac e2 42 fd b8 00 fe ff ff f0 0f c1 03 4c 89 34 24 ff 34 24 9d 01 00 00 00 e8 51 d1 f3 fc 65 8b 05 96 7b b1 7b 85 c0 74 08 48
RSP: 0018:ffff8881ec9478e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000200 RBX: ffffffff8774d4a0 RCX: ffffffff845111d4
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8774d4a0
RBP: ffff8881d88d4000 R08: dffffc0000000000 R09: fffffbfff0ee9a95
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000cc0
netlink_lock_table net/netlink/af_netlink.c:463 [inline]
netlink_broadcast_filtered+0x9d/0x1280 net/netlink/af_netlink.c:1526
netlink_broadcast+0x35/0x50 net/netlink/af_netlink.c:1553
uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
kobject_uevent_net_broadcast+0x375/0x560 lib/kobject_uevent.c:409
kobject_uevent_env+0x54d/0x710 lib/kobject_uevent.c:593
kobject_synth_uevent+0x5fa/0xc60 lib/kobject_uevent.c:208
uevent_store+0x20/0x60 drivers/base/core.c:1960
kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
__vfs_write+0x103/0x750 fs/read_write.c:494
vfs_write+0x206/0x4e0 fs/read_write.c:558
ksys_write+0x199/0x2c0 fs/read_write.c:611
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fb621037bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc3c6179a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00005567685a4ec0 RCX: 00007fb621037bf2
RDX: 0000000000000007 RSI: 0000556768566ce0 RDI: 000000000000000c
RBP: 0000000000000007 R08: 0000556768566ce0 R09: 0000000000000020
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000007
R13: 0000556768566ce0 R14: 00007ffc3c617d88 R15: 0000000000000000
The buggy address belongs to the page:
page:ffffea000786f5c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea00074d9808 ffffea000786f588 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 0, migratetype Unmovable, gfp_mask 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN)
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]
pcpu_alloc_pages mm/percpu-vm.c:94 [inline]
pcpu_populate_chunk+0x1bb/0xd00 mm/percpu-vm.c:284
pcpu_alloc+0x79e/0x1050 mm/percpu.c:1714
prealloc_init+0x238/0x800 kernel/bpf/hashtab.c:154
htab_map_alloc+0x638/0x930 kernel/bpf/hashtab.c:382
find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
map_create kernel/bpf/syscall.c:573 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2873 [inline]
__se_sys_bpf+0x3291/0xbcb0 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_pcp_prepare mm/page_alloc.c:1233 [inline]
free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
free_unref_page mm/page_alloc.c:3134 [inline]
free_the_page mm/page_alloc.c:4953 [inline]
__free_pages+0xaf/0x140 mm/page_alloc.c:4961
pcpu_free_pages mm/percpu-vm.c:64 [inline]
pcpu_depopulate_chunk mm/percpu-vm.c:328 [inline]
pcpu_balance_workfn+0x940/0x1450 mm/percpu.c:1865
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
Memory state around the buggy address:
ffff8881e1bd7080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881e1bd7100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881e1bd7180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881e1bd7200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881e1bd7280: 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 0 P4D 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 161 Comm: udevd Tainted: G B 5.4.274-syzkaller-00016-gdd432c37afcd #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: 0000000000000101 RCX: ffff8881eccc5e80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e1bd71c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9ff0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e1bd71c0
FS: 00007fb620f0cc80(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ecd7f000 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_read_unlock_irqrestore include/linux/rwlock_api_smp.h:236 [inline]
RIP: 0010:_raw_read_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:263
Code: 00 00 00 00 00 41 56 53 50 49 89 f6 48 89 fb be 04 00 00 00 e8 ac e2 42 fd b8 00 fe ff ff f0 0f c1 03 4c 89 34 24 ff 34 24 9d 01 00 00 00 e8 51 d1 f3 fc 65 8b 05 96 7b b1 7b 85 c0 74 08 48
RSP: 0018:ffff8881ec9478e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000200 RBX: ffffffff8774d4a0 RCX: ffffffff845111d4
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8774d4a0
RBP: ffff8881d88d4000 R08: dffffc0000000000 R09: fffffbfff0ee9a95
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000cc0
netlink_lock_table net/netlink/af_netlink.c:463 [inline]
netlink_broadcast_filtered+0x9d/0x1280 net/netlink/af_netlink.c:1526
netlink_broadcast+0x35/0x50 net/netlink/af_netlink.c:1553
uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
kobject_uevent_net_broadcast+0x375/0x560 lib/kobject_uevent.c:409
kobject_uevent_env+0x54d/0x710 lib/kobject_uevent.c:593
kobject_synth_uevent+0x5fa/0xc60 lib/kobject_uevent.c:208
uevent_store+0x20/0x60 drivers/base/core.c:1960
kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
__vfs_write+0x103/0x750 fs/read_write.c:494
vfs_write+0x206/0x4e0 fs/read_write.c:558
ksys_write+0x199/0x2c0 fs/read_write.c:611
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fb621037bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc3c6179a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00005567685a4ec0 RCX: 00007fb621037bf2
RDX: 0000000000000007 RSI: 0000556768566ce0 RDI: 000000000000000c
RBP: 0000000000000007 R08: 0000556768566ce0 R09: 0000000000000020
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000007
R13: 0000556768566ce0 R14: 00007ffc3c617d88 R15: 0000000000000000
Modules linked in:
CR2: 0000000000000000
---[ end trace 8149b79082b8df3d ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881eccc5e80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e1bd71c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9ff0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e1bd71c0
FS: 00007fb620f0cc80(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ecd7f000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 00 41 56 add %al,0x56(%rcx)
7: 53 push %rbx
8: 50 push %rax
9: 49 89 f6 mov %rsi,%r14
c: 48 89 fb mov %rdi,%rbx
f: be 04 00 00 00 mov $0x4,%esi
14: e8 ac e2 42 fd call 0xfd42e2c5
19: b8 00 fe ff ff mov $0xfffffe00,%eax
1e: f0 0f c1 03 lock xadd %eax,(%rbx)
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 51 d1 f3 fc call 0xfcf3d185
34: 65 8b 05 96 7b b1 7b mov %gs:0x7bb17b96(%rip),%eax # 0x7bb17bd1
3b: 85 c0 test %eax,%eax
3d: 74 08 je 0x47
3f: 48 rex.W