------------[ cut here ]------------ WARNING: CPU: 1 PID: 3780 at lib/timerqueue.c:55 timerqueue_del+0xf2/0x140 lib/timerqueue.c:55 Modules linked in: CPU: 1 PID: 3780 Comm: syz-executor.5 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:timerqueue_del+0xf2/0x140 lib/timerqueue.c:55 Code: 48 89 df e8 c0 7c ff ff 4c 89 e1 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 11 00 75 40 48 89 45 08 eb 82 e8 0e b8 82 fd <0f> 0b e9 4c ff ff ff 48 89 df e8 1f 51 c9 fd eb 93 4c 89 e7 e8 95 RSP: 0000:ffffc9000101f370 EFLAGS: 00010046 RAX: 0000000000040000 RBX: ffffe8ffffd3fce0 RCX: ffffc900145f4000 RDX: 0000000000040000 RSI: ffffffff83f2f1a2 RDI: 0000000000000003 RBP: ffff8880b9d42490 R08: ffffe8ffffd3fce0 R09: 0000000000000001 R10: ffffffff83f2f0ec R11: 0000000000000000 R12: ffffe8ffffd3fce0 R13: 0000000000000001 R14: ffff8880b9d423c0 R15: 0000000000000000 FS: 00007f8847706700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f333ef09f80 CR3: 0000000064822000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __remove_hrtimer+0xa1/0x2a0 kernel/time/hrtimer.c:1014 remove_hrtimer+0x19f/0x410 kernel/time/hrtimer.c:1054 hrtimer_try_to_cancel kernel/time/hrtimer.c:1186 [inline] hrtimer_try_to_cancel+0x102/0x1e0 kernel/time/hrtimer.c:1168 hrtimer_cancel+0x13/0x40 kernel/time/hrtimer.c:1295 napi_disable+0xc3/0x110 net/core/dev.c:6909 gro_cells_destroy net/core/gro_cells.c:101 [inline] gro_cells_destroy+0x10d/0x360 net/core/gro_cells.c:92 ip_tunnel_dev_free+0x15/0x60 net/ipv4/ip_tunnel.c:1010 netdev_run_todo+0x6b4/0xa80 net/core/dev.c:10589 rtnl_unlock net/core/rtnetlink.c:112 [inline] rtnetlink_rcv_msg+0x420/0xb80 net/core/rtnetlink.c:5572 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x331/0x810 net/socket.c:2403 ___sys_sendmsg+0xf3/0x170 net/socket.c:2457 __sys_sendmmsg+0x195/0x470 net/socket.c:2543 __do_sys_sendmmsg net/socket.c:2572 [inline] __se_sys_sendmmsg net/socket.c:2569 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2569 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8847706188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 040000000000024a RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000003c6ac R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffe1cc9787f R14: 00007f8847706300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 48 89 df mov %rbx,%rdi 3: e8 c0 7c ff ff callq 0xffff7cc8 8: 4c 89 e1 mov %r12,%rcx b: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 12: fc ff df 15: 48 c1 e9 03 shr $0x3,%rcx 19: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) 1d: 75 40 jne 0x5f 1f: 48 89 45 08 mov %rax,0x8(%rbp) 23: eb 82 jmp 0xffffffa7 25: e8 0e b8 82 fd callq 0xfd82b838 2a: 0f 0b ud2 <-- trapping instruction 2c: e9 4c ff ff ff jmpq 0xffffff7d 31: 48 89 df mov %rbx,%rdi 34: e8 1f 51 c9 fd callq 0xfdc95158 39: eb 93 jmp 0xffffffce 3b: 4c 89 e7 mov %r12,%rdi 3e: e8 .byte 0xe8 3f: 95 xchg %eax,%ebp