watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz.0.122:5210]
Modules linked in:
irq event stamp: 15381499
hardirqs last  enabled at (15381498): [<ffff80000819c464>] __local_bh_enable_ip+0x1f8/0x380 kernel/softirq.c:406
hardirqs last disabled at (15381499): [<ffff8000111a7f84>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (72): [<ffff800010cda068>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (72): [<ffff800010cda068>] tipc_skb_peek_port net/tipc/msg.h:1258 [inline]
softirqs last  enabled at (72): [<ffff800010cda068>] tipc_sk_rcv+0x278/0x22a8 net/tipc/socket.c:2491
softirqs last disabled at (74): [<ffff800010cda084>] spin_trylock_bh include/linux/spinlock.h:423 [inline]
softirqs last disabled at (74): [<ffff800010cda084>] tipc_sk_rcv+0x294/0x22a8 net/tipc/socket.c:2496
CPU: 0 PID: 5210 Comm: syz.0.122 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __preempt_count_add arch/arm64/include/asm/preempt.h:46 [inline]
pc : rcu_is_watching+0x34/0x134 kernel/rcu/tree.c:1122
lr : rcu_read_unlock include/linux/rcupdate.h:768 [inline]
lr : tipc_sk_lookup+0x710/0x8a4 net/tipc/socket.c:3002
sp : ffff8000205661d0
x29: ffff8000205661d0 x28: 0000000000000004 x27: ffff0000d54c93a8
x26: ffff0000ecbb41e8 x25: 1fffe0001d977229 x24: dfff800000000000
x23: 0000000000000520 x22: dfff800000000000 x21: 1fffe0001a2d3001
x20: 0000000000000001 x19: ffff0000d1698008 x18: 0000000000000402
x17: 0000000000000000 x16: ffff8000082bdf08 x15: ffff80000f66d6d0
x14: ffff80000f66d494 x13: 0000000000000003 x12: 0000000000ff0100
x11: 0000000000000201 x10: 0000000000000000 x9 : 0000000000000003
x8 : 0000000000000000 x7 : ffff800010ce686c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800010cdc6f4
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 __preempt_count_add arch/arm64/include/asm/preempt.h:46 [inline]
 rcu_is_watching+0x34/0x134 kernel/rcu/tree.c:1122
 rcu_read_unlock include/linux/rcupdate.h:768 [inline]
 tipc_sk_lookup+0x710/0x8a4 net/tipc/socket.c:3002
 tipc_sk_rcv+0x284/0x22a8 net/tipc/socket.c:2492
 tipc_node_xmit+0x1a4/0xdb4 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x248/0x33c net/tipc/node.c:1783
 tipc_sk_rcv+0x1de8/0x22a8 net/tipc/socket.c:2501
 tipc_node_xmit+0x1a4/0xdb4 net/tipc/node.c:1703
 tipc_sk_push_backlog+0x398/0x744 net/tipc/socket.c:1316
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1370 [inline]
 tipc_sk_proto_rcv+0x704/0x12d0 net/tipc/socket.c:2158
 tipc_sk_filter_rcv+0x252c/0x2798 net/tipc/socket.c:2352
 tipc_sk_enqueue net/tipc/socket.c:2445 [inline]
 tipc_sk_rcv+0x5c8/0x22a8 net/tipc/socket.c:2497
 tipc_node_xmit+0x1a4/0xdb4 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x248/0x33c net/tipc/node.c:1783
 tipc_sk_backlog_rcv+0x168/0x224 net/tipc/socket.c:2412
 sk_backlog_rcv include/net/sock.h:1061 [inline]
 __release_sock+0x19c/0x3a0 net/core/sock.c:2725
 release_sock+0x60/0x258 net/core/sock.c:3266
 sock_setsockopt+0x199c/0x1e1c net/core/sock.c:1379
 __sys_setsockopt+0x32c/0x4b0 net/socket.c:2199
 __do_sys_setsockopt net/socket.c:2214 [inline]
 __se_sys_setsockopt net/socket.c:2211 [inline]
 __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2211
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584