==================================================================
BUG: KASAN: slab-out-of-bounds in hlist_add_head include/linux/list.h:814 [inline]
BUG: KASAN: slab-out-of-bounds in enqueue_timer+0x9e/0x2c0 kernel/time/timer.c:541
Write of size 8 at addr ffff8881e39fb1c8 by task syz.4.585/2497
CPU: 1 PID: 2497 Comm: syz.4.585 Tainted: G W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack+0x1e/0x20 lib/dump_stack.c:77
dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
print_address_description+0x8d/0x4c0 mm/kasan/report.c:384
__kasan_report+0xef/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
__asan_report_store8_noabort+0x17/0x20 mm/kasan/generic_report.c:137
hlist_add_head include/linux/list.h:814 [inline]
enqueue_timer+0x9e/0x2c0 kernel/time/timer.c:541
__internal_add_timer kernel/time/timer.c:554 [inline]
internal_add_timer+0x208/0x3e0 kernel/time/timer.c:604
__mod_timer+0x5ab/0x1150 kernel/time/timer.c:1065
mod_timer+0x1f/0x30 kernel/time/timer.c:1117
can_stat_update+0xbab/0xc40 net/can/proc.c:186
call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
expire_timers kernel/time/timer.c:1493 [inline]
__run_timers+0x81d/0xb60 kernel/time/timer.c:1817
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
__do_softirq+0x236/0x660 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x197/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:539 [inline]
smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:do_check+0x3e5/0x8a60 kernel/bpf/verifier.c:7827
Code: 18 48 89 84 24 50 01 00 00 49 8d 46 20 48 89 84 24 90 01 00 00 41 bd ff ff ff ff c7 84 24 bc 00 00 00 00 00 00 00 4c 89 34 24 <8b> 44 24 40 48 8b 8c 24 70 01 00 00 48 8d 3c c1 48 89 f8 48 c1 e8
RSP: 0018:ffff8881c60274a0 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13
RAX: ffffffff816b6d0d RBX: 0000000000000020 RCX: 0000000000080000
RDX: ffffc9000314e000 RSI: 0000000000040033 RDI: 0000000000040034
RBP: ffff8881c6027710 R08: ffff8881eac6f700 R09: 000000000000000b
R10: 000000000000000c R11: 0000000000000002 R12: 0000000000000006
R13: 000000000000000e R14: ffff8881e39f8000 R15: dffffc0000000000
bpf_check+0x208a/0x9cf0 kernel/bpf/verifier.c:9637
bpf_prog_load+0xa5f/0xe10 kernel/bpf/syscall.c:1724
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x435/0x570 kernel/bpf/syscall.c:2849
__x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f4872edc969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4871545038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f4873103fa0 RCX: 00007f4872edc969
RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005
RBP: 00007f4872f5eab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4873103fa0 R15: 00007ffe05d89d88
The buggy address belongs to the page:
page:ffffea00078e7e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010000(head)
raw: 8000000000010000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
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+0x35e/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4894
__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+0x31/0x100 mm/slab_common.c:1358
kmalloc_large include/linux/slab.h:485 [inline]
__kmalloc+0x162/0x2f0 mm/slub.c:3902
__kmalloc_node include/linux/slab.h:422 [inline]
kmalloc_node include/linux/slab.h:599 [inline]
kvmalloc_node+0x88/0xf0 mm/util.c:596
kvmalloc include/linux/mm.h:761 [inline]
kvzalloc include/linux/mm.h:769 [inline]
bpf_check+0xfb/0x9cf0 kernel/bpf/verifier.c:9561
bpf_prog_load+0xa5f/0xe10 kernel/bpf/syscall.c:1724
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x435/0x570 kernel/bpf/syscall.c:2849
__x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
do_syscall_64+0xcf/0x170 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+0x7e4/0x910 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4956 [inline]
__free_pages+0x8c/0x110 mm/page_alloc.c:4962
kfree+0x1ca/0x260 mm/slub.c:4068
kvfree+0x4c/0x50 mm/util.c:625
bpf_check+0x8371/0x9cf0 kernel/bpf/verifier.c:9731
bpf_prog_load+0xa5f/0xe10 kernel/bpf/syscall.c:1724
__do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
__se_sys_bpf+0x435/0x570 kernel/bpf/syscall.c:2849
__x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881e39fb080: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
ffff8881e39fb100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff8881e39fb180: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
^
ffff8881e39fb200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
ffff8881e39fb280: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e4a5d067 P4D 1e4a5d067 PUD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2513 Comm: syz.3.588 Tainted: G B W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881c7feaf40
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e39fb1c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffbe00
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e39fb1c0
FS: 00007fc6321856c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001c6080000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
expire_timers kernel/time/timer.c:1493 [inline]
__run_timers+0x81d/0xb60 kernel/time/timer.c:1817
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
__do_softirq+0x236/0x660 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x197/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:539 [inline]
smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:tipc_sk_type_connectionless net/tipc/socket.c:283 [inline]
RIP: 0010:tipc_sk_filter_rcv+0xdb/0x22d0 net/tipc/socket.c:2188
Code: 01 00 00 48 8d bb 20 02 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 48 89 5c 24 08 0f 85 d6 1f 00 00 0f b7 82 22 02 00 00 <89> 84 24 d4 00 00 00 48 8d 9a 20 04 00 00 48 89 d8 48 c1 e8 03 42
RSP: 0018:ffff8881ebcaf4c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881e0cd2600 RCX: 0000000000080000
RDX: ffff8881e0cd2600 RSI: 000000000000a1b7 RDI: ffff8881e0cd2820
RBP: ffff8881ebcaf710 R08: dffffc0000000000 R09: ffffed103c19a4de
R10: ffffed103c19a4de R11: 1ffff1103c19a4dd R12: 1ffff1103d795ee8
R13: dffffc0000000000 R14: ffff8881e0cd26e8 R15: ffff8881d3201900
tipc_sk_backlog_rcv+0x109/0x1f0 net/tipc/socket.c:2258
sk_backlog_rcv include/net/sock.h:984 [inline]
__release_sock+0x146/0x360 net/core/sock.c:2470
release_sock+0x60/0x1b0 net/core/sock.c:3025
__tipc_sendstream+0x685/0xf50 net/tipc/socket.c:1485
tipc_sendstream+0x55/0x70 net/tipc/socket.c:1450
sock_sendmsg_nosec net/socket.c:638 [inline]
__sock_sendmsg net/socket.c:650 [inline]
____sys_sendmsg+0x57b/0x8d0 net/socket.c:2306
___sys_sendmsg net/socket.c:2360 [inline]
__sys_sendmsg+0x28e/0x360 net/socket.c:2406
__do_sys_sendmsg net/socket.c:2415 [inline]
__se_sys_sendmsg net/socket.c:2413 [inline]
__x64_sys_sendmsg+0x7f/0x90 net/socket.c:2413
do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fc633b3d969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc632185038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc633d65080 RCX: 00007fc633b3d969
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000004
RBP: 00007fc633bbfab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc633d65080 R15: 00007ffc38733188
Modules linked in:
CR2: 0000000000000000
---[ end trace d29b6d7ca9aa23f9 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881c7feaf40
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e39fb1c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffbe00
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e39fb1c0
FS: 00007fc6321856c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001c6080000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 48 89 84 24 50 01 00 mov %rax,0x150(%rsp)
7: 00
8: 49 8d 46 20 lea 0x20(%r14),%rax
c: 48 89 84 24 90 01 00 mov %rax,0x190(%rsp)
13: 00
14: 41 bd ff ff ff ff mov $0xffffffff,%r13d
1a: c7 84 24 bc 00 00 00 movl $0x0,0xbc(%rsp)
21: 00 00 00 00
25: 4c 89 34 24 mov %r14,(%rsp)
* 29: 8b 44 24 40 mov 0x40(%rsp),%eax <-- trapping instruction
2d: 48 8b 8c 24 70 01 00 mov 0x170(%rsp),%rcx
34: 00
35: 48 8d 3c c1 lea (%rcx,%rax,8),%rdi
39: 48 89 f8 mov %rdi,%rax
3c: 48 rex.W
3d: c1 .byte 0xc1
3e: e8 .byte 0xe8