watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:5076] Modules linked in: irq event stamp: 4923 hardirqs last enabled at (4922): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4923): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (100): [] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline] softirqs last enabled at (100): [] __dev_queue_xmit+0x15f5/0x2e00 net/core/dev.c:3865 softirqs last disabled at (102): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (102): [] call_ad+0x132/0x540 net/netfilter/ipset/ip_set_core.c:1505 CPU: 1 PID: 5076 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hash_ip4_del+0xd5/0xc70 net/netfilter/ipset/ip_set_hash_gen.h:837 Code: fa 45 84 e4 0f 84 7d 09 00 00 e8 26 18 a6 fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 7d 0a 00 00 <48> 8b 03 48 8d 7b 5c 48 89 fa 48 c1 ea 03 48 89 44 24 28 48 b8 00 RSP: 0018:ffff88803a5af090 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880aa23c900 RCX: ffffc90007ee3000 RDX: 1ffff11015447920 RSI: ffffffff86bc6d4a RDI: 0000000000000005 RBP: ffff88803a5af198 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 00000000e0000002 R14: 000000001c1ff30d R15: ffff88803a5af198 FS: 00007f5952752700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000009226d000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hash_ip4_uadt+0x520/0x780 net/netfilter/ipset/ip_set_hash_ip.c:155 call_ad+0x178/0x540 net/netfilter/ipset/ip_set_core.c:1506 ip_set_udel+0x519/0xa90 net/netfilter/ipset/ip_set_core.c:1642 nfnetlink_rcv_msg+0xc4f/0xf60 net/netfilter/nfnetlink.c:233 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 nfnetlink_rcv+0x1b2/0x420 net/netfilter/nfnetlink.c:565 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f59551dcae9 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:00007f5952752188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f59552eff60 RCX: 00007f59551dcae9 RDX: 0000000000000000 RSI: 0000000020001080 RDI: 0000000000000003 RBP: 00007f5955236f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc9d77545f R14: 00007f5952752300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: fa cli 1: 45 84 e4 test %r12b,%r12b 4: 0f 84 7d 09 00 00 je 0x987 a: e8 26 18 a6 fa callq 0xfaa61835 f: 48 89 da mov %rbx,%rdx 12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 19: fc ff df 1c: 48 c1 ea 03 shr $0x3,%rdx 20: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 24: 0f 85 7d 0a 00 00 jne 0xaa7 * 2a: 48 8b 03 mov (%rbx),%rax <-- trapping instruction 2d: 48 8d 7b 5c lea 0x5c(%rbx),%rdi 31: 48 89 fa mov %rdi,%rdx 34: 48 c1 ea 03 shr $0x3,%rdx 38: 48 89 44 24 28 mov %rax,0x28(%rsp) 3d: 48 rex.W 3e: b8 .byte 0xb8