BUG: soft lockup in mld_ifc_timer

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	BUG: soft lockup in mld_ifc_timer_expire	C			1	653d	1017d	0/1	upstream: reported C repro on 2022/02/20 08:51
linux-4.19	BUG: soft lockup in mld_ifc_timer_expire (2)	C		error	8	694d	769d	0/1	upstream: reported C repro on 2022/10/26 17:28

watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.3:8179] Modules linked in: irq event stamp: 16292761 hardirqs last enabled at (16292760): [<ffffffff8198201a>] slab_alloc_node mm/slab.c:3334 [inline] hardirqs last enabled at (16292760): [<ffffffff8198201a>] kmem_cache_alloc_node_trace+0x2da/0x3b0 mm/slab.c:3666 hardirqs last disabled at (16292761): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (6346516): [<ffffffff88400678>] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (6346903): [<ffffffff813927d5>] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (6346903): [<ffffffff813927d5>] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 8179 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3334 [inline] RIP: 0010:kmem_cache_alloc_node_trace+0x2ee/0x3b0 mm/slab.c:3666 Code: fe ff ff 48 f7 04 24 00 02 00 00 0f 84 28 fe ff ff e8 26 89 cf ff 48 83 3d 66 62 59 08 00 0f 84 aa 00 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 e9 23 fe ff ff 65 ff 05 11 bf 69 7e 48 8b 05 c2 db RSP: 0018:ffff8880ba107120 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000490220 RCX: 1ffff110169cfd9a RDX: 0000000000000000 RSI: ffff8880b4e7ed50 RDI: 0000000000000286 RBP: 0000000000490220 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882292d3ac0 R13: ffff88813bff0940 R14: 0000000000000180 R15: ffff88813bff0940 FS: 0000555556cf1400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd1ddc5de0 CR3: 0000000096109000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] ip_do_fragment+0x10f3/0x2620 net/ipv4/ip_output.c:745 ip_fragment.constprop.0+0x174/0x240 net/ipv4/ip_output.c:552 ip_finish_output+0xa35/0x10b0 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 iptunnel_xmit+0x63b/0x9d0 net/ipv4/ip_tunnel_core.c:91 geneve_xmit_skb drivers/net/geneve.c:867 [inline] geneve_xmit+0x120d/0x2e60 drivers/net/geneve.c:943 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip6_finish_output2+0xde7/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 mld_send_cr net/ipv6/mcast.c:1977 [inline] mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __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 </IRQ> RIP: 0010:wait_consider_task+0xb5/0x3910 kernel/exit.c:1336 Code: c8 48 89 4c 24 10 48 c1 e8 03 0f b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4b 1c 00 00 45 8b a6 6c 04 00 00 <bf> 10 00 00 00 44 89 e6 e8 1e 1c 2a 00 41 83 fc 10 0f 84 e7 00 00 RSP: 0018:ffff8880982afb00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff88803391856c RDX: 0000000000000000 RSI: ffffffff81386a82 RDI: ffff8880982afd00 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880b4e7e400 R14: ffff888033918100 R15: ffff8880b4e7e8f0 do_wait_thread kernel/exit.c:1442 [inline] do_wait+0x429/0x9c0 kernel/exit.c:1513 kernel_wait4+0x14c/0x260 kernel/exit.c:1655 __do_sys_wait4 kernel/exit.c:1667 [inline] __se_sys_wait4+0x149/0x160 kernel/exit.c:1663 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4be3db4337 Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44 RSP: 002b:00007ffdf8d8c620 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 000000000000108b RCX: 00007f4be3db4337 RDX: 0000000040000001 RSI: 00007ffdf8d8c6ac RDI: 00000000ffffffff RBP: 00007ffdf8d8c6ac R08: 0000000000000000 R09: 000000b00f978cfc R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000000a6ec6 R14: 0000000000000014 R15: 00007ffdf8d8c710 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10623 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:queued_write_lock_slowpath+0x114/0x290 kernel/locking/qrwlock.c:88 Code: 49 89 df 4c 8d 74 24 28 48 c1 ea 03 41 83 e7 07 4c 8d 2c 02 41 83 c7 03 41 0f b6 45 00 41 38 c7 7c 08 84 c0 0f 85 34 01 00 00 <8b> 03 3d 00 01 00 00 74 1a f3 90 41 0f b6 45 00 41 38 c7 7c eb 84 RSP: 0018:ffff8880aaeefa40 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffff89e09080 RCX: ffffffff814bfec6 RDX: 1ffffffff13c1210 RSI: 0000000000000004 RDI: ffffffff89e09080 RBP: 1ffff110155ddf49 R08: 0000000000000001 R09: fffffbfff13c1210 R10: ffffffff89e09083 R11: 0000000000000000 R12: ffffffff89e09084 R13: fffffbfff13c1210 R14: ffff8880aaeefa68 R15: 0000000000000003 FS: 00007f94a1b24700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005594688e20e8 CR3: 00000000afa90000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:103 [inline] do_raw_write_lock+0xcf/0x1e0 kernel/locking/spinlock_debug.c:203 exit_notify kernel/exit.c:715 [inline] do_exit+0xc41/0x2be0 kernel/exit.c:890 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+0x3f0/0x4a0 arch/x86/entry/common.c:271 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:407 RIP: 0033:0x7f94a333c2c1 Code: Bad RIP value. RSP: 002b:00007f94a1b242f0 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f94a1b24700 RCX: 00007f94a333c2c1 RDX: 00007f94a1b249d0 RSI: 00007f94a1b242f0 RDI: 00000000003d0f00 RBP: 00007ffc41276470 R08: 00007f94a1b24700 R09: 00007f94a1b24700 R10: 00007f94a1b249d0 R11: 0000000000000206 R12: 00007ffc412762de R13: 00007ffc412762df R14: 00007f94a1b24300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: ff 48 f7 decl -0x9(%rax) 3: 04 24 add $0x24,%al 5: 00 02 add %al,(%rdx) 7: 00 00 add %al,(%rax) 9: 0f 84 28 fe ff ff je 0xfffffe37 f: e8 26 89 cf ff callq 0xffcf893a 14: 48 83 3d 66 62 59 08 cmpq $0x0,0x8596266(%rip) # 0x8596282 1b: 00 1c: 0f 84 aa 00 00 00 je 0xcc 22: 48 8b 3c 24 mov (%rsp),%rdi 26: 57 push %rdi 27: 9d popfq * 28: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2d: e9 23 fe ff ff jmpq 0xfffffe55 32: 65 ff 05 11 bf 69 7e incl %gs:0x7e69bf11(%rip) # 0x7e69bf4a 39: 48 rex.W 3a: 8b .byte 0x8b 3b: 05 .byte 0x5 3c: c2 .byte 0xc2 3d: db .byte 0xdb