watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [kworker/0:1:13]
Modules linked in:
irq event stamp: 99487
hardirqs last  enabled at (99485): [<ffff80000883eef4>] ___slab_alloc+0xc34/0xda8 mm/slub.c:2963
hardirqs last disabled at (99487): [<ffff8000111a2130>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (99474): [<ffff800010117820>] ipv6_get_lladdr+0x26c/0x3a4 net/ipv6/addrconf.c:1894
softirqs last disabled at (99486): [<ffff800010150db0>] spin_lock_bh include/linux/spinlock.h:368 [inline]
softirqs last disabled at (99486): [<ffff800010150db0>] rt6_uncached_list_add net/ipv6/route.c:144 [inline]
softirqs last disabled at (99486): [<ffff800010150db0>] icmp6_dst_alloc+0x2b4/0x484 net/ipv6/route.c:3286
CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: ipv6_addrconf addrconf_dad_work
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_add_valid+0x40/0x110 lib/list_debug.c:27
lr : __list_add include/linux/list.h:67 [inline]
lr : list_add_tail include/linux/list.h:100 [inline]
lr : rt6_uncached_list_add net/ipv6/route.c:145 [inline]
lr : icmp6_dst_alloc+0x2e4/0x484 net/ipv6/route.c:3286
sp : ffff80001b2f7610
x29: ffff80001b2f7610 x28: ffff0001b42cde48 x27: ffff0001b42cde40
x26: ffff0000cad56c08 x25: ffff0001b42cde00 x24: ffff0000cad56d50
x23: dfff800000000000 x22: ffff0001b42cde48 x21: ffff0000cad56d48
x20: ffff0000cad56c08 x19: ffff0001b42cde40 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d4648 x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000282a06b x12: ffff70000365eeac
x11: 1ffff0000365eeac x10: 0000000000000004 x9 : bd932fceddebb500
x8 : 0000000000000000 x7 : ffff800010150db0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082d4768
x2 : ffff0001b42cde40 x1 : ffff0000cad56c08 x0 : ffff0000cad56d48
Call trace:
 __list_add_valid+0x40/0x110 lib/list_debug.c:27
 __list_add include/linux/list.h:67 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 rt6_uncached_list_add net/ipv6/route.c:145 [inline]
 icmp6_dst_alloc+0x2e4/0x484 net/ipv6/route.c:3286
 ndisc_send_skb+0x32c/0x1684 net/ipv6/ndisc.c:493
 ndisc_send_rs+0x484/0x624 net/ipv6/ndisc.c:707
 addrconf_dad_completed+0x668/0xb3c net/ipv6/addrconf.c:4278
 addrconf_dad_work+0x954/0x1150 net/ipv6/addrconf.c:-1
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870