watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.4:17741] Modules linked in: irq event stamp: 3714263 hardirqs last enabled at (3714262): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3714263): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3662648): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3662651): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3662651): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 17741 Comm: syz-executor.4 Not tainted 4.19.197-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:sctp_bind_addr_match+0xfb/0x2c0 net/sctp/bind_addr.c:328 Code: 6b ba f0 f9 48 8d 7b 3d 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 91 01 00 00 44 0f b6 7b 3d <31> ff 44 89 fe e8 6b bb f0 f9 45 84 ff 74 52 e8 31 ba f0 f9 48 8b RSP: 0018:ffff8880ba107780 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88809f09cc00 RCX: ffffffff8771c603 RDX: 0000000000000005 RSI: ffffffff8771c585 RDI: ffff88809f09cc3d RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880485213c0 R13: ffff88809bbaa4d0 R14: ffff8880ba1079d8 R15: 0000000000000001 FS: 00007fae0cd61700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5389261740 CR3: 0000000009e6d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sctp_addrs_lookup_transport+0x8a9/0xbf0 net/sctp/input.c:950 __sctp_lookup_association net/sctp/input.c:993 [inline] __sctp_rcv_lookup net/sctp/input.c:1257 [inline] sctp_rcv+0x846/0x3270 net/sctp/input.c:171 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5848 napi_poll net/core/dev.c:6272 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6338 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:zap_pte_range mm/memory.c:1316 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1463 [inline] RIP: 0010:zap_pud_range mm/memory.c:1492 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1513 [inline] RIP: 0010:unmap_page_range+0xa8f/0x2c50 mm/memory.c:1534 Code: 89 6c 24 30 c7 84 24 cc 00 00 00 00 00 00 00 48 c1 e8 03 4c 01 f0 48 89 84 24 88 00 00 00 49 8d 87 00 f0 ff ff 48 89 44 24 70 bc fc d6 ff 48 8b 44 24 30 48 c1 e8 03 42 80 3c 30 00 0f 85 4d RSP: 0018:ffff888047f1f770 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 00007fae0e440000 RBX: 00007fae0e563000 RCX: ffffffff818b8926 RDX: 00007fae0e440000 RSI: ffff8880425fe380 RDI: 0000000000000006 RBP: ffffea000246c570 R08: 0000000000000000 R09: 00007fae0e563000 R10: 0000000000000006 R11: 0000000000000000 R12: dead000000000100 R13: ffffea000246c540 R14: dffffc0000000000 R15: 00007fae0e441000 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1015 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1036 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007fae0cd61188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc6653b9df R14: 00007fae0cd61300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3016 Comm: kworker/u4:4 Not tainted 4.19.197-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:316 [inline] RIP: 0010:__lock_acquire+0x892/0x3ff0 kernel/locking/lockdep.c:3411 Code: 29 d0 01 c2 c1 c1 10 89 d6 41 31 c8 44 89 c1 44 29 c0 41 01 d0 c1 c9 0d 31 c8 89 c1 29 c6 44 01 c0 c1 c1 04 31 f1 48 c1 e1 20 <48> 09 c1 48 85 ff 49 89 cc 74 1a be ff ff ff ff 4c 89 14 24 e8 e5 RSP: 0018:ffff8880abb379f8 EFLAGS: 00000086 RAX: 00000000a171beda RBX: ef545f96172bec08 RCX: c13fb1d400000000 RDX: 00000000475685f8 RSI: 0000000019c6f1f6 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000073e22ad8 R09: 0000000000000002 R10: ffff8880aba1cdd8 R11: 0000000000000000 R12: 000000000002002e R13: ffff8880aba1c500 R14: ffff8880aba1cdf0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005432b8 CR3: 00000000a8ded000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] batadv_nc_process_nc_paths.part.0+0xec/0x3d0 net/batman-adv/network-coding.c:698 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:690 [inline] batadv_nc_worker+0x9bb/0xd50 net/batman-adv/network-coding.c:739 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415