==================================================================
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 ffff8881f29df1c8 by task syz-executor.2/3504
CPU: 1 PID: 3504 Comm: syz-executor.2 Tainted: G W 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:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49
Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec
RSP: 0018:ffff8881e245eea8 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 1ffff1103d12853b RCX: 00000000000001c0
RDX: ffffc90002751000 RSI: 00000000000307e4 RDI: ffff8881d9980e40
RBP: ffff8881e89429d8 R08: dffffc0000000000 R09: ffffed103e4c4c96
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003
R13: ffff8881d9980000 R14: dffffc0000000000 R15: 0000000000000008
clear_page arch/x86/include/asm/page_64.h:49 [inline]
clear_highpage include/linux/highmem.h:219 [inline]
kernel_init_free_pages mm/page_alloc.c:1131 [inline]
prep_new_page+0xff/0x370 mm/page_alloc.c:2174
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
alloc_slab_page+0x39/0x3c0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x440 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2fe/0x490 mm/slub.c:2667
__slab_alloc+0x62/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
__kmalloc+0x19b/0x2e0 mm/slub.c:3909
__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]
kvmalloc_array include/linux/mm.h:779 [inline]
__ptr_ring_init_queue_alloc include/linux/ptr_ring.h:470 [inline]
ptr_ring_init include/linux/ptr_ring.h:488 [inline]
skb_array_init include/linux/skb_array.h:182 [inline]
pfifo_fast_init+0x240/0x760 net/sched/sch_generic.c:784
qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90
qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
attach_default_qdiscs net/sched/sch_generic.c:1113 [inline]
dev_activate+0x11f/0xc00 net/sched/sch_generic.c:1154
__dev_open+0x302/0x420 net/core/dev.c:1335
__dev_change_flags+0x1db/0x6e0 net/core/dev.c:7939
dev_change_flags+0x87/0x190 net/core/dev.c:8010
dev_ifsioc+0x104/0xa60 net/core/dev_ioctl.c:226
dev_ioctl+0x505/0xb40 net/core/dev_ioctl.c:483
sock_do_ioctl+0x295/0x3a0 net/socket.c:1081
sock_ioctl+0x4a4/0x760 net/socket.c:1198
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: 0033:0x7f7213d4aee9
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:00007f7212abf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7213e81fa0 RCX: 00007f7213d4aee9
RDX: 0000000020000080 RSI: 0000000000008914 RDI: 0000000000000007
RBP: 00007f7213d9747f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7213e81fa0 R15: 00007fff7de28c98
The buggy address belongs to the page:
page:ffffea0007ca77c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea0007518ac8 ffffea0007515748 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 0x500dc0(GFP_USER|__GFP_ZERO|__GFP_ACCOUNT)
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]
pmd_alloc_one arch/x86/include/asm/pgalloc.h:96 [inline]
__pmd_alloc+0x3d/0x220 mm/memory.c:4270
pmd_alloc include/linux/mm.h:2002 [inline]
__handle_mm_fault mm/memory.c:4119 [inline]
handle_mm_fault+0x277f/0x4990 mm/memory.c:4189
do_user_addr_fault arch/x86/mm/fault.c:1469 [inline]
__do_page_fault+0x509/0xbb0 arch/x86/mm/fault.c:1530
page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
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_list+0x10a/0x590 mm/page_alloc.c:3154
release_pages+0xad8/0xb20 mm/swap.c:842
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:189 [inline]
tlb_flush_mmu mm/mmu_gather.c:196 [inline]
tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:277
exit_mmap+0x2dc/0x520 mm/mmap.c:3193
__mmput+0x8e/0x2c0 kernel/fork.c:1101
exit_mm kernel/exit.c:536 [inline]
do_exit+0xc08/0x2bc0 kernel/exit.c:846
do_group_exit+0x138/0x300 kernel/exit.c:982
get_signal+0xdb1/0x1440 kernel/signal.c:2735
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
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881f29df080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881f29df100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881f29df180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881f29df200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881f29df280: 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 1e6c9d067 P4D 1e6c9d067 PUD 1d9c9e067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3504 Comm: syz-executor.2 Tainted: G B W 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:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881e8941f80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881f29df1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffbf30
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881f29df1c0
FS: 00007f7212abf6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001f29de000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49
Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec
RSP: 0018:ffff8881e245eea8 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 1ffff1103d12853b RCX: 00000000000001c0
RDX: ffffc90002751000 RSI: 00000000000307e4 RDI: ffff8881d9980e40
RBP: ffff8881e89429d8 R08: dffffc0000000000 R09: ffffed103e4c4c96
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003
R13: ffff8881d9980000 R14: dffffc0000000000 R15: 0000000000000008
clear_page arch/x86/include/asm/page_64.h:49 [inline]
clear_highpage include/linux/highmem.h:219 [inline]
kernel_init_free_pages mm/page_alloc.c:1131 [inline]
prep_new_page+0xff/0x370 mm/page_alloc.c:2174
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
alloc_slab_page+0x39/0x3c0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x440 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2fe/0x490 mm/slub.c:2667
__slab_alloc+0x62/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
__kmalloc+0x19b/0x2e0 mm/slub.c:3909
__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]
kvmalloc_array include/linux/mm.h:779 [inline]
__ptr_ring_init_queue_alloc include/linux/ptr_ring.h:470 [inline]
ptr_ring_init include/linux/ptr_ring.h:488 [inline]
skb_array_init include/linux/skb_array.h:182 [inline]
pfifo_fast_init+0x240/0x760 net/sched/sch_generic.c:784
qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90
qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
attach_default_qdiscs net/sched/sch_generic.c:1113 [inline]
dev_activate+0x11f/0xc00 net/sched/sch_generic.c:1154
__dev_open+0x302/0x420 net/core/dev.c:1335
__dev_change_flags+0x1db/0x6e0 net/core/dev.c:7939
dev_change_flags+0x87/0x190 net/core/dev.c:8010
dev_ifsioc+0x104/0xa60 net/core/dev_ioctl.c:226
dev_ioctl+0x505/0xb40 net/core/dev_ioctl.c:483
sock_do_ioctl+0x295/0x3a0 net/socket.c:1081
sock_ioctl+0x4a4/0x760 net/socket.c:1198
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: 0033:0x7f7213d4aee9
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:00007f7212abf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7213e81fa0 RCX: 00007f7213d4aee9
RDX: 0000000020000080 RSI: 0000000000008914 RDI: 0000000000000007
RBP: 00007f7213d9747f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7213e81fa0 R15: 00007fff7de28c98
Modules linked in:
CR2: 0000000000000000
---[ end trace f9a7c738a56bfd61 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154d7aa RBX: 0000000000000101 RCX: ffff8881e8941f80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881f29df1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffbf30
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881f29df1c0
FS: 00007f7212abf6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001f29de000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 48 89 47 18 mov %rax,0x18(%rdi)
4: 48 89 47 20 mov %rax,0x20(%rdi)
8: 48 89 47 28 mov %rax,0x28(%rdi)
c: 48 89 47 30 mov %rax,0x30(%rdi)
10: 48 89 47 38 mov %rax,0x38(%rdi)
14: 48 8d 7f 40 lea 0x40(%rdi),%rdi
18: 75 d9 jne 0xfffffff3
1a: 90 nop
1b: c3 ret
1c: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
23: b9 00 10 00 00 mov $0x1000,%ecx
28: 31 c0 xor %eax,%eax
* 2a: f3 aa rep stos %al,%es:(%rdi) <-- trapping instruction
2c: c3 ret
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 90 nop
33: 55 push %rbp
34: 41 57 push %r15
36: 41 56 push %r14
38: 41 55 push %r13
3a: 41 54 push %r12
3c: 53 push %rbx
3d: 48 rex.W
3e: 83 .byte 0x83
3f: ec in (%dx),%al