INFO: task syz-executor.0:11902 blocked for more than 143 seconds. Not tainted 5.17.0-rc4-syzkaller-00020-g705d84a366cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28496 pid:11902 ppid: 3630 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0x926/0x1080 kernel/sched/core.c:6296 schedule+0x12b/0x1f0 kernel/sched/core.c:6369 rwsem_down_write_slowpath+0xdb7/0x1480 kernel/locking/rwsem.c:1142 __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1268 [inline] down_write_nested+0x16f/0x180 kernel/locking/rwsem.c:1625 lock_rename+0x182/0x1a0 do_renameat2+0x75d/0x1450 fs/namei.c:4769 __do_sys_rename fs/namei.c:4874 [inline] __se_sys_rename fs/namei.c:4872 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:4872 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f203c00b059 RSP: 002b:00007f203a93e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f203c11e100 RCX: 00007f203c00b059 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000080 RBP: 00007f203c06508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff59ce12cf R14: 00007f203a93e300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8cb1d460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3274: #0: ffff8880238fb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2077 2 locks held by syz-executor.0/11897: 2 locks held by syz-executor.0/11902: #0: ffff88802a674460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff88802af82c10 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: lock_rename+0x182/0x1a0 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc4-syzkaller-00020-g705d84a366cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:369 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 962 Comm: kworker/u4:4 Not tainted 5.17.0-rc4-syzkaller-00020-g705d84a366cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond2 bond_alb_monitor RIP: 0010:rcu_read_lock_sched_held+0xbb/0x130 kernel/rcu/update.c:126 Code: 00 00 48 c7 04 24 0e 36 e0 45 49 c7 04 1e 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 48 75 6d 44 89 f8 48 8d 65 e0 5b <41> 5c 41 5e 41 5f 5d c3 65 8b 05 ce 4a 93 7e 41 bf 01 00 00 00 a9 RSP: 0018:ffffc900050df9d0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000002 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc900050df9e8 R08: dffffc0000000000 R09: fffffbfff1c00866 R10: fffffbfff1c00866 R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff92000a1bf50 R14: dffffc0000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558ae6a24680 CR3: 0000000025033000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire+0x59/0x190 include/trace/events/lock.h:13 lock_acquire+0xa5/0x4d0 kernel/locking/lockdep.c:5610 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170 process_one_work+0x97b/0x1190 kernel/workqueue.c:2335 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 c7 04 24 0e 36 e0 movq $0x45e0360e,(%rsp) 9: 45 a: 49 c7 04 1e 00 00 00 movq $0x0,(%r14,%rbx,1) 11: 00 12: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax 19: 00 00 1b: 48 3b 44 24 48 cmp 0x48(%rsp),%rax 20: 75 6d jne 0x8f 22: 44 89 f8 mov %r15d,%eax 25: 48 8d 65 e0 lea -0x20(%rbp),%rsp 29: 5b pop %rbx * 2a: 41 5c pop %r12 <-- trapping instruction 2c: 41 5e pop %r14 2e: 41 5f pop %r15 30: 5d pop %rbp 31: c3 retq 32: 65 8b 05 ce 4a 93 7e mov %gs:0x7e934ace(%rip),%eax # 0x7e934b07 39: 41 bf 01 00 00 00 mov $0x1,%r15d 3f: a9 .byte 0xa9