------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.1.65-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.0/9184 is trying to acquire lock:
ffffffff8d11e640 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1805 [inline]
ffffffff8d11e640 (console_owner){-...}-{0:0}, at: console_emit_next_record+0x9fa/0xea0 kernel/printk/printk.c:2739

but task is already holding lock:
ffffffff8d1881f8 (trace_printk_lock){-.-.}-{2:2}, at: ____bpf_trace_printk kernel/trace/bpf_trace.c:390 [inline]
ffffffff8d1881f8 (trace_printk_lock){-.-.}-{2:2}, at: bpf_trace_printk+0x151/0x200 kernel/trace/bpf_trace.c:376

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (trace_printk_lock){-.-.}-{2:2}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
       ____bpf_trace_printk kernel/trace/bpf_trace.c:390 [inline]
       bpf_trace_printk+0x151/0x200 kernel/trace/bpf_trace.c:376
       bpf_prog_12183cdb1cd51dab+0x17/0x32
       bpf_dispatcher_nop_func include/linux/bpf.h:970 [inline]
       __bpf_prog_run include/linux/filter.h:600 [inline]
       bpf_prog_run include/linux/filter.h:607 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2275 [inline]
       bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2316
       __traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
       trace_sched_switch include/trace/events/sched.h:222 [inline]
       __schedule+0x2116/0x4550 kernel/sched/core.c:6555
       preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6727
       preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6751
       preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
       try_to_wake_up+0x87e/0x12e0 kernel/sched/core.c:4234
       wake_up_process kernel/sched/core.c:4362 [inline]
       wake_up_q+0x8b/0xd0 kernel/sched/core.c:1007
       futex_wake+0x4ea/0x590 kernel/futex/waitwake.c:184
       do_futex+0x375/0x490 kernel/futex/syscalls.c:111
       __do_sys_futex kernel/futex/syscalls.c:183 [inline]
       __se_sys_futex+0x3d7/0x460 kernel/futex/syscalls.c:164
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #4 (&rq->__lock){-.-.}-{2:2}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
       _raw_spin_lock_nested+0x2d/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
       raw_spin_rq_lock kernel/sched/sched.h:1354 [inline]
       rq_lock kernel/sched/sched.h:1644 [inline]
       task_fork_fair+0x5d/0x350 kernel/sched/fair.c:11863
       sched_cgroup_fork+0x374/0x400 kernel/sched/core.c:4686
       copy_process+0x2442/0x4060 kernel/fork.c:2384
       kernel_clone+0x222/0x920 kernel/fork.c:2682
       user_mode_thread+0x12e/0x190 kernel/fork.c:2758
       rest_init+0x23/0x300 init/main.c:696
       start_kernel+0x0/0x53f init/main.c:891
       start_kernel+0x496/0x53f init/main.c:1138
       secondary_startup_64_no_verify+0xcf/0xdb

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
       try_to_wake_up+0xad/0x12e0 kernel/sched/core.c:4112
       __wake_up_common+0x2a0/0x4e0 kernel/sched/wait.c:107
       __wake_up_common_lock kernel/sched/wait.c:138 [inline]
       __wake_up+0x11a/0x1c0 kernel/sched/wait.c:160
       tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:71
       serial8250_tx_chars+0x60d/0x800 drivers/tty/serial/8250/8250_port.c:1860
       serial8250_handle_irq+0x4ff/0x6a0 drivers/tty/serial/8250/8250_port.c:1967
       serial8250_default_handle_irq+0xc8/0x1e0 drivers/tty/serial/8250/8250_port.c:1987
       serial8250_interrupt+0xa1/0x1e0 drivers/tty/serial/8250/8250_core.c:126
       __handle_irq_event_percpu+0x2a8/0xb20 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0x85/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x245/0xbf0 kernel/irq/chip.c:819
       generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
       handle_irq arch/x86/kernel/irq.c:231 [inline]
       __common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:250
       common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240
       asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640
       set_brk+0x0/0x110 arch/x86/include/asm/elf.h:312
       load_elf_binary+0x1a65/0x2750 fs/binfmt_elf.c:1241
       search_binary_handler fs/exec.c:1733 [inline]
       exec_binprm fs/exec.c:1774 [inline]
       bprm_execve+0x96a/0x18a0 fs/exec.c:1843
       do_execveat_common+0x580/0x720 fs/exec.c:1948
       do_execve fs/exec.c:2022 [inline]
       __do_sys_execve fs/exec.c:2098 [inline]
       __se_sys_execve fs/exec.c:2093 [inline]
       __x64_sys_execve+0x8e/0xa0 fs/exec.c:2093
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #2 (&tty->write_wait){-.-.}-{2:2}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
       __wake_up_common_lock kernel/sched/wait.c:137 [inline]
       __wake_up+0xfd/0x1c0 kernel/sched/wait.c:160
       tty_port_default_wakeup+0xa2/0xf0 drivers/tty/tty_port.c:71
       serial8250_tx_chars+0x60d/0x800 drivers/tty/serial/8250/8250_port.c:1860
       serial8250_handle_irq+0x4ff/0x6a0 drivers/tty/serial/8250/8250_port.c:1967
       serial8250_default_handle_irq+0xc8/0x1e0 drivers/tty/serial/8250/8250_port.c:1987
       serial8250_interrupt+0xa1/0x1e0 drivers/tty/serial/8250/8250_core.c:126
       __handle_irq_event_percpu+0x2a8/0xb20 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0x85/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x245/0xbf0 kernel/irq/chip.c:819
       generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
       handle_irq arch/x86/kernel/irq.c:231 [inline]
       __common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:250
       common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240
       asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640
       __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
       _raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
       spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
       uart_write+0x6af/0x930 drivers/tty/serial/serial_core.c:600
       process_output_block drivers/tty/n_tty.c:586 [inline]
       n_tty_write+0xd7f/0x1260 drivers/tty/n_tty.c:2367
       do_tty_write drivers/tty/tty_io.c:1018 [inline]
       file_tty_write+0x504/0x890 drivers/tty/tty_io.c:1089
       call_write_iter include/linux/fs.h:2248 [inline]
       new_sync_write fs/read_write.c:491 [inline]
       vfs_write+0x7ae/0xba0 fs/read_write.c:584
       ksys_write+0x19c/0x2c0 fs/read_write.c:637
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #1 (&port_lock_key){-.-.}-{2:2}:
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
       serial8250_console_write+0x19d/0x1750 drivers/tty/serial/8250/8250_port.c:3410
       call_console_driver kernel/printk/printk.c:1942 [inline]
       console_emit_next_record+0xb09/0xea0 kernel/printk/printk.c:2742
       console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
       vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
       _printk+0xd1/0x111 kernel/printk/printk.c:2293
       register_console+0x69e/0x990 kernel/printk/printk.c:3219
       univ8250_console_init+0x41/0x43 drivers/tty/serial/8250/8250_core.c:687
       console_init+0x1d6/0x7f3 kernel/printk/printk.c:3309
       start_kernel+0x30b/0x53f init/main.c:1074
       secondary_startup_64_no_verify+0xcf/0xdb

-> #0 (console_owner){-...}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3090 [inline]
       check_prevs_add kernel/locking/lockdep.c:3209 [inline]
       validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
       __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
       lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
       console_lock_spinning_enable kernel/printk/printk.c:1805 [inline]
       console_emit_next_record+0xa17/0xea0 kernel/printk/printk.c:2739
       console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
       vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
       _printk+0xd1/0x111 kernel/printk/printk.c:2293
       __warn_printk+0x233/0x350 kernel/panic.c:715
       format_decode+0x12d2/0x1f10 lib/vsprintf.c:2656
       bstr_printf+0x130/0x10c0 lib/vsprintf.c:3229
       ____bpf_trace_printk kernel/trace/bpf_trace.c:391 [inline]
       bpf_trace_printk+0x186/0x200 kernel/trace/bpf_trace.c:376
       bpf_prog_12183cdb1cd51dab+0x2e/0x32
       bpf_dispatcher_nop_func include/linux/bpf.h:970 [inline]
       __bpf_prog_run include/linux/filter.h:600 [inline]
       bpf_prog_run include/linux/filter.h:607 [inline]
       bpf_test_run+0x40f/0x8b0 net/bpf/test_run.c:402
       bpf_prog_test_run_skb+0xaf1/0x13a0 net/bpf/test_run.c:1180
       bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3633
       __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:4986
       __do_sys_bpf kernel/bpf/syscall.c:5072 [inline]
       __se_sys_bpf kernel/bpf/syscall.c:5070 [inline]
       __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5070
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

other info that might help us debug this:

Chain exists of:
  console_owner --> &rq->__lock --> trace_printk_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(trace_printk_lock);
                               lock(&rq->__lock);
                               lock(trace_printk_lock);
  lock(console_owner);

 *** DEADLOCK ***

3 locks held by syz-executor.0/9184:
 #0: ffffffff8d12a1e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
 #0: ffffffff8d12a1e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8d12a1e0 (rcu_read_lock){....}-{1:2}, at: bpf_test_timer_enter+0x19/0x140 net/bpf/test_run.c:36
 #1: ffffffff8d1881f8 (trace_printk_lock){-.-.}-{2:2}, at: ____bpf_trace_printk kernel/trace/bpf_trace.c:390 [inline]
 #1: ffffffff8d1881f8 (trace_printk_lock){-.-.}-{2:2}, at: bpf_trace_printk+0x151/0x200 kernel/trace/bpf_trace.c:376
 #2: ffffffff8d0063a0 (console_lock){+.+.}-{0:0}, at: _printk+0xd1/0x111 kernel/printk/printk.c:2293

stack backtrace:
CPU: 1 PID: 9184 Comm: syz-executor.0 Not tainted 6.1.65-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170
 check_prev_add kernel/locking/lockdep.c:3090 [inline]
 check_prevs_add kernel/locking/lockdep.c:3209 [inline]
 validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 console_lock_spinning_enable kernel/printk/printk.c:1805 [inline]
 console_emit_next_record+0xa17/0xea0 kernel/printk/printk.c:2739
 console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
 _printk+0xd1/0x111 kernel/printk/printk.c:2293
 __warn_printk+0x233/0x350 kernel/panic.c:715
 format_decode+0x12d2/0x1f10 lib/vsprintf.c:2656
 bstr_printf+0x130/0x10c0 lib/vsprintf.c:3229
 ____bpf_trace_printk kernel/trace/bpf_trace.c:391 [inline]
 bpf_trace_printk+0x186/0x200 kernel/trace/bpf_trace.c:376
 bpf_prog_12183cdb1cd51dab+0x2e/0x32
 bpf_dispatcher_nop_func include/linux/bpf.h:970 [inline]
 __bpf_prog_run include/linux/filter.h:600 [inline]
 bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_test_run+0x40f/0x8b0 net/bpf/test_run.c:402
 bpf_prog_test_run_skb+0xaf1/0x13a0 net/bpf/test_run.c:1180
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3633
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:4986
 __do_sys_bpf kernel/bpf/syscall.c:5072 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5070 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5070
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f337c67cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f337d2f50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f337c79bf80 RCX: 00007f337c67cae9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007f337c6c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f337c79bf80 R15: 00007ffeb3553a88
 </TASK>
Please remove unsupported % in format string
WARNING: CPU: 1 PID: 9184 at lib/vsprintf.c:2656 format_decode+0x12d2/0x1f10 lib/vsprintf.c:2656
Modules linked in:
CPU: 1 PID: 9184 Comm: syz-executor.0 Not tainted 6.1.65-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:format_decode+0x12d2/0x1f10 lib/vsprintf.c:2656
Code: db 03 01 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 30 0c 00 00 41 0f be 36 48 c7 c7 20 67 07 8c e8 fe 65 ce f6 <0f> 0b e9 01 fa ff ff 48 8b 4c 24 18 80 e1 07 38 c1 0f 8c e3 ed ff
RSP: 0018:ffffc900035ef6a0 EFLAGS: 00010046
RAX: cba55103526abb00 RBX: 00000000ffffffdb RCX: 0000000000040000
RDX: ffffc90003bb1000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900035ef790 R08: ffffffff81527dae R09: ffffed1017324f1c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff0a00ffffff00
R13: ffff0000ffffff00 R14: ffffc900035ef9ac R15: 1ffff920006bdf35
FS:  00007f337d2f56c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32d21000 CR3: 0000000074424000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 bstr_printf+0x130/0x10c0 lib/vsprintf.c:3229
 ____bpf_trace_printk kernel/trace/bpf_trace.c:391 [inline]
 bpf_trace_printk+0x186/0x200 kernel/trace/bpf_trace.c:376
 bpf_prog_12183cdb1cd51dab+0x2e/0x32
 bpf_dispatcher_nop_func include/linux/bpf.h:970 [inline]
 __bpf_prog_run include/linux/filter.h:600 [inline]
 bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_test_run+0x40f/0x8b0 net/bpf/test_run.c:402
 bpf_prog_test_run_skb+0xaf1/0x13a0 net/bpf/test_run.c:1180
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3633
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:4986
 __do_sys_bpf kernel/bpf/syscall.c:5072 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5070 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5070
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f337c67cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f337d2f50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f337c79bf80 RCX: 00007f337c67cae9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007f337c6c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f337c79bf80 R15: 00007ffeb3553a88
 </TASK>