watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz.0.604:6738]
Modules linked in:
irq event stamp: 5177
hardirqs last  enabled at (5176): [<ffff800011258dd8>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (5176): [<ffff800011258dd8>] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (5177): [<ffff800011259030>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (600): [<ffff80000f6f4fdc>] spin_unlock_bh include/linux/spinlock.h:409 [inline]
softirqs last  enabled at (600): [<ffff80000f6f4fdc>] release_sock+0x1d0/0x258 net/core/sock.c:3285
softirqs last disabled at (606): [<ffff80000f705550>] spin_lock_bh include/linux/spinlock.h:369 [inline]
softirqs last disabled at (606): [<ffff80000f705550>] lock_sock_nested+0xf4/0x1d4 net/core/sock.c:3262
CPU: 0 PID: 6738 Comm: syz.0.604 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x13c/0x7ac kernel/locking/qspinlock.c:382
lr : queued_spin_lock_slowpath+0x148/0x7ac kernel/locking/qspinlock.c:382
sp : ffff8000239c7600
x29: ffff8000239c76a0 x28: ffff8000141f1008 x27: ffff8000239c7620
x26: 0000000000000001 x25: ffff0000d3f88000 x24: dfff800000000000
x23: ffff700004738ec4 x22: ffff700004738ee4 x21: ffff0000e9279c90
x20: ffff0000e9279c98 x19: ffff0000e9279c88 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d82e4 x15: 000000000000000a
x14: 0000000000000001 x13: 1fffe0001d24f391 x12: 0000000000000000
x11: 0000000000000000 x10: ffff60001d24f392 x9 : 0000000000000000
x8 : 0000000000000101 x7 : ffff80000f705550 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082d75d4
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 queued_spin_lock_slowpath+0x13c/0x7ac kernel/locking/qspinlock.c:382
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x2f8/0x2fc kernel/locking/spinlock_debug.c:115
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x11c/0x1b4 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:369 [inline]
 lock_sock_nested+0xf4/0x1d4 net/core/sock.c:3262
 lock_sock include/net/sock.h:1744 [inline]
 tipc_sendstream+0x50/0x84 net/tipc/socket.c:1549
 sock_sendmsg_nosec net/socket.c:706 [inline]
 __sock_sendmsg net/socket.c:718 [inline]
 ____sys_sendmsg+0x62c/0x940 net/socket.c:2445
 ___sys_sendmsg+0x1f0/0x27c net/socket.c:2499
 __sys_sendmsg net/socket.c:2528 [inline]
 __do_sys_sendmsg net/socket.c:2537 [inline]
 __se_sys_sendmsg net/socket.c:2535 [inline]
 __arm64_sys_sendmsg+0x1bc/0x278 net/socket.c:2535
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 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