BUG: soft lockup in mld_ifc

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-5-15	BUG: soft lockup in mld_ifc_work	1				1	829d	829d	0/2	auto-obsoleted due to no activity on 2024/08/19 06:49
linux-6.1	BUG: soft lockup in mld_ifc_work	1				1	1178d	1178d	0/3	auto-obsoleted due to no activity on 2023/09/15 05:45
upstream	BUG: soft lockup in mld_ifc_work (2) wireless	1	syz, C			2	839d	851d	26/29	fixed on 2024/08/06 11:02
upstream	BUG: soft lockup in mld_ifc_work net	1				6	1131d	1107d	0/29	auto-obsoleted due to no activity on 2023/10/31 17:53
upstream	INFO: rcu detected stall in mld_ifc_work net	1	syz, C	inconclusive		1	1657d	1657d	22/29	fixed on 2023/02/24 13:50
linux-6.1	INFO: rcu detected stall in mld_ifc_work origin:lts-only	1	syz, C		inconclusive	4	379d	669d	0/3	upstream: reported C repro on 2024/10/28 06:47
linux-5.15	INFO: rcu detected stall in mld_ifc_work origin:lts-only	1	syz, C		error	8	237d	716d	0/3	upstream: reported C repro on 2024/09/10 22:08

watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:6:4096] Modules linked in: irq event stamp: 152427 hardirqs last enabled at (152426): [<ffff800011959e88>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (152426): [<ffff800011959e88>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (152427): [<ffff80001195a0d0>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (148292): [<ffff8000109e96a0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (148294): [<ffff8000108819c0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 CPU: 1 PID: 4096 Comm: kworker/1:6 Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: mld mld_ifc_work pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_kcov_mode kernel/kcov.c:165 [inline] pc : __sanitizer_cov_trace_pc+0x6c/0xa4 kernel/kcov.c:197 lr : get_packet_txtime net/sched/sch_taprio.c:392 [inline] lr : taprio_enqueue_one+0xcdc/0x1468 net/sched/sch_taprio.c:426 sp : ffff80001d2f70f0 x29: ffff80001d2f72b0 x28: ffff0000d060f330 x27: 0000000000000000 x26: 1fffe0001a0c1e83 x25: 04c4add39da915c1 x24: 04c4add39da915c1 x23: ffff0000d060f418 x22: ffff0000d060f300 x21: 04c4add31da9162d x20: 0000000000000001 x19: 04c4add39da91541 x18: 0000000000000000 x17: ff8080000fe833f8 x16: ffff8000082e8c60 x15: ffff80000fe833f8 x14: 1ffff0000291e06a x13: ffffffffffffffff x12: 0000000000000000 x11: ff808000100af0ec x10: 0000000000000000 x9 : ffff8000100af0ec x8 : ffff0000cce78000 x7 : 0000000000000000 x6 : ffff80001d2f71f0 x5 : ffff80001d2f7210 x4 : 04c4add31da9162d x3 : ffff8000100af960 x2 : 0000000000000000 x1 : 7fffffffffffffff x0 : ffff0000d060f400 Call trace: check_kcov_mode kernel/kcov.c:163 [inline] __sanitizer_cov_trace_pc+0x6c/0xa4 kernel/kcov.c:197 taprio_enqueue+0x2b0/0x514 net/sched/sch_taprio.c:491 dev_qdisc_enqueue+0x60/0x35c net/core/dev.c:3789 __dev_xmit_skb net/core/dev.c:3873 [inline] __dev_queue_xmit+0x1048/0x2a6c net/core/dev.c:4190 dev_queue_xmit+0x24/0x34 net/core/dev.c:4258 neigh_hh_output include/net/neighbour.h:493 [inline] neigh_output include/net/neighbour.h:507 [inline] ip6_finish_output2+0x1310/0x1c48 net/ipv6/ip6_output.c:126 __ip6_finish_output+0x518/0x67c net/ipv6/ip6_output.c:191 ip6_finish_output+0x40/0x218 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:443 [inline] NF_HOOK+0x160/0x4ec include/linux/netfilter.h:302 mld_sendpack+0x828/0x1264 net/ipv6/mcast.c:1820 mld_send_cr net/ipv6/mcast.c:2121 [inline] mld_ifc_work+0x85c/0xb9c net/ipv6/mcast.c:2653 process_one_work+0x790/0x11b8 kernel/workqueue.c:2307 worker_thread+0x910/0x1034 kernel/workqueue.c:2454 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870