watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz.4.3769:17262] Modules linked in: irq event stamp: 32111701 hardirqs last enabled at (32111700): [<ffff80008031257c>] __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:394 hardirqs last disabled at (32111701): [<ffff80008b8056d0>] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (32111701): [<ffff80008b8056d0>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (3818): [<ffff80008b29e740>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (3818): [<ffff80008b29e740>] tipc_skb_peek_port net/tipc/msg.h:1235 [inline] softirqs last enabled at (3818): [<ffff80008b29e740>] tipc_sk_rcv+0x34c/0x1878 net/tipc/socket.c:2489 softirqs last disabled at (3820): [<ffff80008b29e760>] spin_trylock_bh include/linux/spinlock.h:411 [inline] softirqs last disabled at (3820): [<ffff80008b29e760>] tipc_sk_rcv+0x36c/0x1878 net/tipc/socket.c:2494 CPU: 0 UID: 0 PID: 17262 Comm: syz.4.3769 Not tainted 6.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : lock_acquire+0x278/0x724 lr : lockdep_recursion_finish kernel/locking/lockdep.c:469 [inline] lr : lock_acquire+0x248/0x724 kernel/locking/lockdep.c:5853 sp : ffff80009c1b5fe0 x29: ffff80009c1b60e0 x28: dfff800000000000 x27: ffff700013836c08 x26: ffff0001b378e540 x25: ffff80009c1b6690 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80008fb18540 x19: ffff0001b378e540 x18: ffff80009c1b6160 x17: 000000000001dfbd x16: ffff8000832d977c x15: 0000000000000001 x14: 1ffff00011f7a0cb x13: dfff800000000000 x12: 00000000ea28e059 x11: 00000000cb58b2d5 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff80008b29e5d8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000008 x1 : ffff80008b8bb360 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) lock_acquire+0x278/0x724 kernel/locking/lockdep.c:5854 (P) __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x48/0x60 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] tipc_skb_peek_port net/tipc/msg.h:1225 [inline] tipc_sk_rcv+0x1e4/0x1878 net/tipc/socket.c:2489 tipc_node_xmit+0x1b0/0xdb4 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x28c/0x3a4 net/tipc/node.c:1781 tipc_sk_rcv+0x1268/0x1878 net/tipc/socket.c:2499 tipc_node_xmit+0x1b0/0xdb4 net/tipc/node.c:1701 tipc_sk_push_backlog+0x3b0/0x74c net/tipc/socket.c:1312 tipc_sk_conn_proto_rcv net/tipc/socket.c:1366 [inline] tipc_sk_proto_rcv+0x83c/0x1540 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x298c/0x2c6c net/tipc/socket.c:2350 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x824/0x1878 net/tipc/socket.c:2495 tipc_node_xmit+0x1b0/0xdb4 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x28c/0x3a4 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x164/0x214 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1122 [inline] __release_sock+0x1a8/0x3d8 net/core/sock.c:3106 release_sock+0x68/0x1b8 net/core/sock.c:3660 sk_setsockopt+0xc94/0x311c sock_setsockopt+0x68/0x80 net/core/sock.c:1646 do_sock_setsockopt+0x238/0x4e0 net/socket.c:2294 __sys_setsockopt net/socket.c:2323 [inline] __do_sys_setsockopt net/socket.c:2329 [inline] __se_sys_setsockopt net/socket.c:2326 [inline] __arm64_sys_setsockopt+0x170/0x1e0 net/socket.c:2326 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 17261 Comm: syz.4.3769 Not tainted 6.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x15c/0xd04 kernel/locking/qspinlock.c:380 lr : queued_spin_lock_slowpath+0x168/0xd04 kernel/locking/qspinlock.c:380 sp : ffff80009c1e7860 x29: ffff80009c1e7920 x28: 1fffe0001d77f498 x27: dfff800000000000 x26: 1ffff0001383cf38 x25: ffff80009c1e78a0 x24: dfff800000000000 x23: ffff80009c1e78e0 x22: ffff70001383cf14 x21: 0000000000000001 x20: 1ffff0001383cf1c x19: ffff0000ebbfa4c0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800080bfa304 x15: 0000000000000001 x14: 1fffe0001d77f498 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001d77f499 x10: 1fffe0001d77f498 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff8000898ae900 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008b82a200 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: __cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) queued_spin_lock_slowpath+0x15c/0xd04 kernel/locking/qspinlock.c:380 (P) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2ec/0x334 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x50/0x60 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x74/0x11c net/core/sock.c:3648 lock_sock include/net/sock.h:1624 [inline] tipc_release+0xa8/0x1468 net/tipc/socket.c:637 __sock_release net/socket.c:642 [inline] sock_close+0xa4/0x1e8 net/socket.c:1393 __fput+0x340/0x760 fs/file_table.c:448 ____fput+0x20/0x30 fs/file_table.c:476 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600