RBP: 00007f0993c15cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0993d67fa0 R15: 00007fff7666d5a8
watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.0.28:432]
Modules linked in:
CPU: 0 PID: 432 Comm: syz.0.28 Not tainted 5.10.227-syzkaller-00554-g550d1177dc67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:call_rcu+0xd1d/0x11f0
Code: 00 48 8b 05 75 59 22 05 49 03 45 00 48 39 c3 7f 70 48 8b 44 24 38 48 89 44 24 60 ff 74 24 60 9d 49 bd 00 00 00 00 00 fc ff df <48> 8b 5c 24 40 48 c7 84 24 80 00 00 00 0e 36 e0 45 49 c7 44 1d 00
RSP: 0018:ffffc90000006fc0 EFLAGS: 00000246
RAX: 0000000000000246 RBX: 0000000000000469 RCX: ffffffff815736d9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881f7057388
RBP: ffffc90000007138 R08: dffffc0000000000 R09: ffffed103ee0ae72
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1103ee0ae71
R13: dffffc0000000000 R14: 1ffff1103ee0ae73 R15: ffff8881f7057388
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e209a CR3: 000000010e9d1000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 dst_release+0x9b/0xe0 net/core/dst.c:179
 refdst_drop include/net/dst.h:252 [inline]
 skb_dst_drop include/net/dst.h:264 [inline]
 skb_release_head_state+0x74/0x220 net/core/skbuff.c:664
 skb_release_all net/core/skbuff.c:678 [inline]
 __kfree_skb net/core/skbuff.c:694 [inline]
 kfree_skb+0x89/0x320 net/core/skbuff.c:713
 ip6_tnl_start_xmit+0xe8a/0x1690 net/ipv6/ip6_tunnel.c:1464
 __netdev_start_xmit include/linux/netdevice.h:4858 [inline]
 netdev_start_xmit include/linux/netdevice.h:4872 [inline]
 xmit_one net/core/dev.c:3607 [inline]
 dev_hard_start_xmit+0x228/0x620 net/core/dev.c:3623
 __dev_queue_xmit+0x154e/0x28a0 net/core/dev.c:4194
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4227
 neigh_connected_output+0x417/0x450 net/core/neighbour.c:1538
 neigh_output include/net/neighbour.h:517 [inline]
 ip6_finish_output2+0xf21/0x1850 net/ipv6/ip6_output.c:145
 __ip6_finish_output+0x5ec/0x780 net/ipv6/ip6_output.c:216
 ip6_finish_output+0x34/0x1e0 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:249
 dst_output include/net/dst.h:437 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6e9/0xc00 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1789
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x268/0x5bb kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:mnt_add_count+0x3c/0x50 fs/namespace.c:154
Code: 48 83 c3 68 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 db 81 ef ff 48 8b 03 65 44 01 30 <5b> 41 5e 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48
RSP: 0018:ffffc900012877e0 EFLAGS: 00000257
RAX: 0000607e08c15940 RBX: ffff88810a6fbe28 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff88810a6fbdc0
RBP: ffffc900012877f0 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff52000250ef0 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88810a6fbdc0 R14: 00000000ffffffff R15: 1ffff92000250f08
 mntput_no_expire+0x158/0x6a0 fs/namespace.c:1165
 mntput+0x5d/0xc0 fs/namespace.c:1214
 __fput+0x55e/0x7b0 fs/file_table.c:297
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xc83/0x2a50 kernel/exit.c:863
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0x10a0/0x1410 kernel/signal.c:2793
 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7f0993ba1ed9
Code: Unable to access opcode bytes at RIP 0x7f0993ba1eaf.
RSP: 002b:00007f0992219058 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f0993d67fa0 RCX: 00007f0993ba1ed9
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000006
RBP: 00007f0993c15cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0993d67fa0 R15: 00007fff7666d5a8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3929 Comm: syz-executor Not tainted 5.10.227-syzkaller-00554-g550d1177dc67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:277 [inline]
RIP: 0010:path_init+0x1ac/0x11a0 fs/namei.c:2313
Code: 01 31 ff e8 c6 2e b6 ff 89 d8 83 e0 01 44 89 65 d4 75 0a 4d 89 ec e8 03 2b b6 ff eb 59 49 c7 c6 c0 d5 60 86 49 c1 ee 03 f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 04 06 84 c0 75 12 8b 1d 3b
RSP: 0018:ffffc90001c87890 EFLAGS: 00000293
RAX: ffffffff81b4948f RBX: 0000000000008b9d RCX: ffff88812938bb40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001c87930 R08: ffffffff81b4944a R09: ffffed1023efb49b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000043
R13: ffff888146ac0020 R14: 1ffffffff0cc1ab8 R15: ffffc90001c87bc0
FS:  0000555556617500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff62b8f4ff8 CR3: 0000000155703000 CR4: 00000000003506a0
DR0: 0000000020000300 DR1: 0000000020000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 path_openat+0x184/0x3000 fs/namei.c:3504
 do_filp_open+0x21c/0x460 fs/namei.c:3536
 do_sys_openat2+0x13f/0x710 fs/open.c:1217
 do_sys_open fs/open.c:1233 [inline]
 __do_sys_openat fs/open.c:1249 [inline]
 __se_sys_openat fs/open.c:1244 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1244
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fb5326c67d1
Code: 44 24 18 31 c0 41 83 e2 40 75 3e 89 f0 25 00 00 41 00 3d 00 00 41 00 74 30 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 3f 48 8b 54 24 18 64 48 2b 14 25 28 00 00 00
RSP: 002b:00007ffeaf4a47c0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fb5326c67d1
RDX: 0000000000090800 RSI: 00007fb53273afe8 RDI: 00000000ffffff9c
RBP: 00007ffeaf4a485c R08: 00007ffeaf5ba080 R09: 00007ffeaf5ba0b0
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000024ac35 R14: 000000000024a8e4 R15: 00007ffeaf4a48b0