------------[ cut here ]------------
WARNING: CPU: 1 PID: 7120 at kernel/workqueue.c:2257 __queue_work+0xcd3/0xf50 kernel/workqueue.c:2256
Modules linked in:
CPU: 1 UID: 0 PID: 7120 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-g79d93c8ff358 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__queue_work+0xcd3/0xf50 kernel/workqueue.c:2256
Code: ff e8 e1 af 38 00 90 0f 0b 90 e9 b2 fe ff ff e8 d3 af 38 00 eb 13 e8 cc af 38 00 eb 0c e8 c5 af 38 00 eb 05 e8 be af 38 00 90 <0f> 0b 90 48 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc90000a18b08 EFLAGS: 00010046
RAX: ffffffff818915bd RBX: 0000000000000100 RCX: ffff888070518000
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff818909e8 R09: 1ffffffff207a0ce
R10: dffffc0000000000 R11: ffffffff81891df0 R12: ffff88802e5cf800
R13: ffff88802e5cf9c0 R14: dffffc0000000000 R15: 0000000000000008
FS: 000055558c6a7500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff29b410218 CR3: 0000000061cd6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x187/0x650 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1835 [inline]
__run_timers kernel/time/timer.c:2414 [inline]
__run_timer_base+0x695/0x8e0 kernel/time/timer.c:2426
run_timer_base kernel/time/timer.c:2435 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stackdepot_memcmp lib/stackdepot.c:527 [inline]
RIP: 0010:find_stack lib/stackdepot.c:561 [inline]
RIP: 0010:stack_depot_save_flags+0x1d2/0x920 lib/stackdepot.c:619
Code: 8b 44 24 04 45 85 f6 75 65 4d 8b 3f 49 39 df 74 5a 45 39 6f 10 75 f2 45 39 4f 14 75 ec 31 c0 49 8b 0c c4 49 3b 4c c7 20 75 df <48> ff c0 39 c5 75 ee 41 f6 c0 02 74 37 49 8d 7f 1c 45 8b 77 1c 45
RSP: 0018:ffffc90002f87188 EFLAGS: 00000246
RAX: 000000000000000f RBX: ffff88823bab1ee0 RCX: ffffffff8abe0473
RDX: ffffc90002f872c0 RSI: 0000000000000002 RDI: 0000000091882507
RBP: 0000000000000019 R08: 0000000000000001 R09: 0000000000000019
R10: dffffc0000000000 R11: fffffbfff207a0cf R12: ffffc90002f87200
R13: 000000000a3cb1ee R14: 0000000000000000 R15: ffff888078e7cd60
kasan_save_stack mm/kasan/common.c:48 [inline]
kasan_save_track+0x51/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kmem_cache_free+0x195/0x410 mm/slub.c:4711
skb_kfree_head net/core/skbuff.c:994 [inline]
skb_free_head net/core/skbuff.c:1008 [inline]
skb_release_data+0x677/0x8a0 net/core/skbuff.c:1035
skb_release_all net/core/skbuff.c:1100 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
consume_skb+0x9f/0xf0 net/core/skbuff.c:1346
netlink_broadcast_filtered+0x116d/0x12a0 net/netlink/af_netlink.c:1533
nlmsg_multicast_filtered include/net/netlink.h:1128 [inline]
nlmsg_multicast include/net/netlink.h:1147 [inline]
nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2586
inet6_ifmcaddr_notify+0x192/0x2a0 net/ipv6/mcast.c:936
__ipv6_dev_mc_inc+0x8ea/0xac0 net/ipv6/mcast.c:989
ipv6_add_dev+0xe12/0x1220 net/ipv6/addrconf.c:471
addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3646
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2250 [inline]
call_netdevice_notifiers net/core/dev.c:2264 [inline]
register_netdevice+0x16b5/0x1b60 net/core/dev.c:10984
register_netdev+0x40/0x50 net/core/dev.c:11062
vti6_init_net+0x233/0x370 net/ipv6/ip6_vti.c:1155
ops_init+0x349/0x5b0 net/core/net_namespace.c:138
setup_net+0x287/0x9e0 net/core/net_namespace.c:362
copy_net_ns+0x33f/0x570 net/core/net_namespace.c:516
create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
ksys_unshare+0x57d/0xa70 kernel/fork.c:3342
__do_sys_unshare kernel/fork.c:3413 [inline]
__se_sys_unshare kernel/fork.c:3411 [inline]
__x64_sys_unshare+0x38/0x40 kernel/fork.c:3411
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff29b38e967
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffed53648b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff29b38e967
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007ffed5364920 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffed5364920
R13: 00007ffed5364928 R14: 0000000000000009 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 8b 44 24 04 mov 0x4(%rsp),%eax
4: 45 85 f6 test %r14d,%r14d
7: 75 65 jne 0x6e
9: 4d 8b 3f mov (%r15),%r15
c: 49 39 df cmp %rbx,%r15
f: 74 5a je 0x6b
11: 45 39 6f 10 cmp %r13d,0x10(%r15)
15: 75 f2 jne 0x9
17: 45 39 4f 14 cmp %r9d,0x14(%r15)
1b: 75 ec jne 0x9
1d: 31 c0 xor %eax,%eax
1f: 49 8b 0c c4 mov (%r12,%rax,8),%rcx
23: 49 3b 4c c7 20 cmp 0x20(%r15,%rax,8),%rcx
28: 75 df jne 0x9
* 2a: 48 ff c0 inc %rax <-- trapping instruction
2d: 39 c5 cmp %eax,%ebp
2f: 75 ee jne 0x1f
31: 41 f6 c0 02 test $0x2,%r8b
35: 74 37 je 0x6e
37: 49 8d 7f 1c lea 0x1c(%r15),%rdi
3b: 45 8b 77 1c mov 0x1c(%r15),%r14d
3f: 45 rex.RB