watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz.0.18:6587] Modules linked in: irq event stamp: 4849 hardirqs last enabled at (4848): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (4848): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (4849): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (4849): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (338): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (338): [] lock_sock_nested+0xcc/0x11c net/core/sock.c:3629 softirqs last disabled at (340): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (340): [] rose_remove_socket net/rose/af_rose.c:154 [inline] softirqs last disabled at (340): [] rose_destroy_socket+0x38/0x4a8 net/rose/af_rose.c:363 CPU: 0 UID: 0 PID: 6587 Comm: syz.0.18 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 : ffff8000a35b7940 x29: ffff8000a35b7a00 x28: 1ffff00012545d44 x27: dfff800000000000 x26: 1ffff000146b6f54 x25: ffff8000a35b7980 x24: dfff800000000000 x23: ffff8000a35b79c0 x22: ffff7000146b6f30 x21: 0000000000000001 x20: 1ffff000146b6f38 x19: ffff800092a2ea20 x18: ffff8000a35b7840 x17: 000000000001c81c x16: ffff800080bf1494 x15: 0000000000000001 x14: 1ffff00012545d44 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700012545d45 x10: 1ffff00012545d44 x9 : 0000000000000000 x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80008b6c1928 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] rose_remove_socket net/rose/af_rose.c:154 [inline] rose_destroy_socket+0x38/0x4a8 net/rose/af_rose.c:363 rose_release+0x1e4/0x530 __sock_release net/socket.c:640 [inline] sock_close+0xa4/0x1e8 net/socket.c:1408 __fput+0x1bc/0x75c fs/file_table.c:450 ____fput+0x20/0x30 fs/file_table.c:478 task_work_run+0x230/0x2e0 kernel/task_work.c:239 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 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6586 Comm: syz.0.18 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : rose_find_socket net/rose/af_rose.c:309 [inline] pc : rose_new_lci+0xdc/0x320 net/rose/af_rose.c:327 lr : rose_find_socket net/rose/af_rose.c:309 [inline] lr : rose_new_lci+0xdc/0x320 net/rose/af_rose.c:327 sp : ffff8000a42a7a10 x29: ffff8000a42a7a10 x28: ffff0000d872c000 x27: 1fffe0001b0e58b8 x26: ffff0000d872c000 x25: ffff80009793d000 x24: ffff800092a2e000 x23: dfff800000000000 x22: 0000000000000000 x21: ffff800092a2ea20 x20: 0000000000000001 x19: ffff0000d298c800 x18: ffff8000a42a76e0 x17: 000000000001c5da x16: ffff80008069d55c x15: ffff700014854f28 x14: 1ffff00014854f28 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff700014854f28 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d405bc80 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff8000936015d0 x4 : 0000000000000008 x3 : ffff80008047cdcc x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: rose_find_socket net/rose/af_rose.c:309 [inline] (P) rose_new_lci+0xdc/0x320 net/rose/af_rose.c:327 (P) rose_connect+0x3e4/0xe44 net/rose/af_rose.c:815 __sys_connect_file net/socket.c:2055 [inline] __sys_connect+0x260/0x294 net/socket.c:2074 __do_sys_connect net/socket.c:2080 [inline] __se_sys_connect net/socket.c:2077 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2077 __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