IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:18365] Modules linked in: irq event stamp: 275440 hardirqs last enabled at (275439): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (275440): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (275430): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (275091): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (275091): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 18365 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 RSP: 0018:ffff88805a937150 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880448ca0c0 RBX: ffff88805a9374a0 RCX: ffffc900118cb000 RDX: 0000000000000002 RSI: ffffffff81763e43 RDI: ffff88809e082290 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66501b R12: ffff88805a9372a0 R13: dffffc0000000000 R14: ffff88809e082280 R15: 0000000000000010 FS: 00007f87167ee700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f9a000 CR3: 0000000096ba5000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_event_count kernel/events/core.c:3927 [inline] perf_output_read_group kernel/events/core.c:6217 [inline] perf_output_read+0xbc3/0x1270 kernel/events/core.c:6254 perf_output_sample+0xc1b/0x18f0 kernel/events/core.c:6296 __perf_event_output kernel/events/core.c:6621 [inline] perf_event_output_forward+0x12f/0x270 kernel/events/core.c:6634 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7907 perf_swevent_overflow kernel/events/core.c:7983 [inline] perf_swevent_event+0x347/0x550 kernel/events/core.c:8011 do_perf_sw_event kernel/events/core.c:8124 [inline] ___perf_sw_event+0x309/0x570 kernel/events/core.c:8155 __perf_sw_event+0x58/0x120 kernel/events/core.c:8167 perf_sw_event include/linux/perf_event.h:1074 [inline] __do_page_fault+0x80e/0xd60 arch/x86/mm/fault.c:1453 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 0f 01 cb 83 RSP: 0018:ffff88805a937a50 EFLAGS: 00050206 RAX: ffffed1008ab2ea0 RBX: 0000000000007500 RCX: 0000000000002fcb RDX: 0000000000007500 RSI: 0000000020f9a000 RDI: ffff888045594535 RBP: 0000000020f95acb R08: 0000000000000001 R09: ffffed1008ab2e9f R10: ffff8880455974ff R11: 0000000000000000 R12: ffff888045590000 R13: 0000000020f9cfcb R14: 00007ffffffff000 R15: 0000000000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:71 [inline] copyin+0xcd/0xf0 lib/iov_iter.c:146 _copy_from_iter_full+0x1df/0x7c0 lib/iov_iter.c:724 copy_from_iter_full include/linux/uio.h:124 [inline] skb_do_copy_data_nocache include/net/sock.h:1971 [inline] skb_copy_to_page_nocache include/net/sock.h:1997 [inline] tcp_sendmsg_locked+0x126b/0x2f60 net/ipv4/tcp.c:1364 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1462 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8717e7b5a9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f87167ee168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f8717f9bf80 RCX: 00007f8717e7b5a9 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000007 RBP: 00007f8717ed6580 R08: 0000000000000000 R09: 0000000000000053 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb0f22c6f R14: 00007f87167ee300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9679 Comm: syz-fuzzer Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:hlock_class kernel/locking/lockdep.c:145 [inline] RIP: 0010:mark_lock+0x47/0x1160 kernel/locking/lockdep.c:3106 Code: 89 fd 41 54 48 c1 ea 03 41 bc 01 00 00 00 55 41 d3 e4 48 89 f5 53 48 83 ec 18 0f b6 04 02 84 c0 74 08 3c 01 0f 8e f1 07 00 00 <0f> b7 45 20 66 a9 ff 1f 74 7c 48 ba 00 00 00 00 00 fc ff df 4c 89 RSP: 0000:ffff888051f9fd88 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000007 RDX: 1ffff1100a3f2515 RSI: ffff888051f92888 RDI: ffff888051f92000 RBP: ffff888051f92888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000080 R13: ffff888051f92000 R14: ffff888051f928a8 R15: 0000000000000007 FS: 000000c0258ff090(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00c4b4ff8 CR3: 00000000af3fd000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks+0xa6/0xf0 kernel/locking/lockdep.c:2810 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2839 [inline] lockdep_hardirqs_on+0x3a8/0x5c0 kernel/locking/lockdep.c:2884 count_memcg_events include/linux/memcontrol.h:745 [inline] count_memcg_event_mm include/linux/memcontrol.h:766 [inline] handle_mm_fault+0x829/0xb10 mm/memory.c:4316 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x41e5db Code: 0f b6 11 44 89 c1 45 89 d5 41 d3 ea 41 0f ba e2 04 0f 83 ec 00 00 00 48 89 44 24 58 41 0f a3 cd 0f 83 87 00 00 00 4e 8d 14 20 <4d> 8b 12 66 90 4d 85 d2 74 79 4d 89 d5 4d 29 e2 4c 39 d2 77 6e 89 RSP: 002b:000000c0002b1e80 EFLAGS: 00010207 RAX: 0000000000000008 RBX: 000000c00003f698 RCX: 0000000000000003 RDX: 0000000000000030 RSI: 0000000000203003 RDI: 0000000000c046b0 RBP: 000000c0002b1f08 R08: 0000000000000003 R09: 00007f88fda1aa7f R10: 000000c00c4b4ff8 R11: 00007f88fdbf4fff R12: 000000c00c4b4ff0 R13: 00000000000000d9 R14: 000000c01f769380 R15: 0000000000000009