FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 ====================================================== WARNING: possible circular locking dependency detected 6.11.0-syzkaller-g88264981f208 #0 Not tainted ------------------------------------------------------ syz-executor150/5227 is trying to acquire lock: ffffffff8e813460 (console_owner){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:342 [inline] ffffffff8e813460 (console_owner){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:267 [inline] ffffffff8e813460 (console_owner){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline] ffffffff8e813460 (console_owner){....}-{0:0}, at: console_flush_all+0x1a3/0xeb0 kernel/printk/printk.c:3157 but task is already holding lock: ffff8880b862c898 (hrtimer_bases.lock){-.-.}-{2:2}, at: lock_hrtimer_base kernel/time/hrtimer.c:175 [inline] ffff8880b862c898 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0x109/0xca0 kernel/time/hrtimer.c:1300 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (hrtimer_bases.lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 lock_hrtimer_base kernel/time/hrtimer.c:175 [inline] hrtimer_start_range_ns+0x109/0xca0 kernel/time/hrtimer.c:1300 rpm_suspend+0x12a2/0x1730 drivers/base/power/runtime.c:606 __pm_runtime_idle+0x131/0x1a0 drivers/base/power/runtime.c:1104 pm_runtime_put include/linux/pm_runtime.h:448 [inline] __device_attach+0x3e5/0x520 drivers/base/dd.c:1047 bus_probe_device+0x189/0x260 drivers/base/bus.c:532 device_add+0x856/0xbf0 drivers/base/core.c:3682 serdev_controller_add+0x83/0x660 drivers/tty/serdev/core.c:782 serdev_tty_port_register+0x163/0x260 drivers/tty/serdev/serdev-ttyport.c:300 tty_port_register_device_attr_serdev+0xe1/0x160 drivers/tty/tty_port.c:191 serial_core_add_one_port drivers/tty/serial/serial_core.c:3225 [inline] serial_core_register_port+0x1135/0x2870 drivers/tty/serial/serial_core.c:3437 serial8250_register_8250_port+0x1545/0x1ec0 drivers/tty/serial/8250/8250_core.c:820 serial_pnp_probe+0x4f9/0x9d0 drivers/tty/serial/8250/8250_pnp.c:490 pnp_device_probe+0x2ba/0x460 drivers/pnp/driver.c:111 really_probe+0x2b8/0xad0 drivers/base/dd.c:657 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:799 driver_probe_device+0x50/0x430 drivers/base/dd.c:829 __driver_attach+0x45f/0x710 drivers/base/dd.c:1215 bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368 bus_add_driver+0x346/0x670 drivers/base/bus.c:673 driver_register+0x23a/0x320 drivers/base/driver.c:246 serial8250_init+0xc1/0x1c0 drivers/tty/serial/8250/8250_platform.c:238 do_one_initcall+0x248/0x880 init/main.c:1269 do_initcall_level+0x157/0x210 init/main.c:1331 do_initcalls+0x3f/0x80 init/main.c:1347 kernel_init_freeable+0x435/0x5d0 init/main.c:1580 kernel_init+0x1d/0x2b0 init/main.c:1469 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #2 (&dev->power.lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 __pm_runtime_resume+0x112/0x180 drivers/base/power/runtime.c:1171 pm_runtime_get include/linux/pm_runtime.h:396 [inline] __uart_start+0x17c/0x450 drivers/tty/serial/serial_core.c:148 uart_write+0x280/0xa40 drivers/tty/serial/serial_core.c:633 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0xd62/0x1230 drivers/tty/n_tty.c:2389 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write+0x546/0x9b0 drivers/tty/tty_io.c:1096 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x1a0/0x2c0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&port_lock_key){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:711 [inline] serial8250_console_write+0x1a7/0x1ed0 drivers/tty/serial/8250/8250_port.c:3352 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x86b/0xeb0 kernel/printk/printk.c:3180 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407 _printk+0xd5/0x120 kernel/printk/printk.c:2432 register_console+0xbf5/0xfd0 kernel/printk/printk.c:4069 univ8250_console_init+0x52/0x90 drivers/tty/serial/8250/8250_core.c:513 console_init+0x1b8/0x6f0 kernel/printk/printk.c:4262 start_kernel+0x2d8/0x500 init/main.c:1040 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 -> #0 (console_owner){....}-{0:0}: check_prev_add kernel/locking/lockdep.c:3158 [inline] check_prevs_add kernel/locking/lockdep.c:3277 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3901 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 console_lock_spinning_enable kernel/printk/printk.c:1905 [inline] console_emit_next_record kernel/printk/printk.c:3086 [inline] console_flush_all+0x7f8/0xeb0 kernel/printk/printk.c:3180 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407 _printk+0xd5/0x120 kernel/printk/printk.c:2432 fail_dump lib/fault-inject.c:46 [inline] should_fail_ex+0x391/0x4e0 lib/fault-inject.c:154 strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline] ____bpf_probe_read_user_str kernel/trace/bpf_trace.c:224 [inline] bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:221 bpf_prog_99b56f93a3ca5fea+0x4b/0x4d bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2359 trace_hrtimer_start include/trace/events/timer.h:222 [inline] debug_activate kernel/time/hrtimer.c:479 [inline] enqueue_hrtimer+0x35a/0x3c0 kernel/time/hrtimer.c:1085 __hrtimer_start_range_ns kernel/time/hrtimer.c:1260 [inline] hrtimer_start_range_ns+0xac8/0xca0 kernel/time/hrtimer.c:1302 hrtimer_start include/linux/hrtimer.h:275 [inline] perf_swevent_start_hrtimer kernel/events/core.c:11254 [inline] cpu_clock_event_start kernel/events/core.c:11312 [inline] cpu_clock_event_add+0x180/0x1a0 kernel/events/core.c:11324 event_sched_in+0x832/0xe90 kernel/events/core.c:2620 group_sched_in kernel/events/core.c:2653 [inline] merge_sched_in kernel/events/core.c:3931 [inline] visit_groups_merge+0x1521/0x2fd0 kernel/events/core.c:3876 pmu_groups_sched_in kernel/events/core.c:3958 [inline] __pmu_ctx_sched_in+0x1aa/0x230 kernel/events/core.c:3970 ctx_sched_in+0x4c2/0x600 kernel/events/core.c:4021 ctx_resched+0x560/0x900 kernel/events/core.c:2807 __perf_install_in_context+0x647/0x850 kernel/events/core.c:2882 remote_function+0xef/0x170 kernel/events/core.c:92 csd_do_func kernel/smp.c:134 [inline] generic_exec_single+0x336/0x9b0 kernel/smp.c:433 smp_call_function_single+0x3fa/0x1990 kernel/smp.c:676 task_function_call kernel/events/core.c:120 [inline] perf_install_in_context+0x71a/0xb20 kernel/events/core.c:2985 __do_sys_perf_event_open kernel/events/core.c:13006 [inline] __se_sys_perf_event_open+0x31c5/0x38d0 kernel/events/core.c:12658 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: console_owner --> &dev->power.lock --> hrtimer_bases.lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(hrtimer_bases.lock); lock(&dev->power.lock); lock(hrtimer_bases.lock); lock(console_owner); *** DEADLOCK *** 8 locks held by syz-executor150/5227: #0: ffff8880501d2cd8 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open kernel/events/core.c:12797 [inline] #0: ffff8880501d2cd8 (&sig->exec_update_lock){++++}-{3:3}, at: __se_sys_perf_event_open+0xe64/0x38d0 kernel/events/core.c:12658 #1: ffff88802e6418a8 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open kernel/events/core.c:12821 [inline] #1: ffff88802e6418a8 (&ctx->mutex){+.+.}-{3:3}, at: __se_sys_perf_event_open+0x13f9/0x38d0 kernel/events/core.c:12658 #2: ffff8880b86376c8 (&cpuctx_lock){....}-{2:2}, at: __perf_install_in_context+0xdc/0x850 kernel/events/core.c:2843 #3: ffff88802e641818 (&ctx->lock){....}-{2:2}, at: __perf_install_in_context+0x110/0x850 kernel/events/core.c:2845 #4: ffff8880b862c898 (hrtimer_bases.lock){-.-.}-{2:2}, at: lock_hrtimer_base kernel/time/hrtimer.c:175 [inline] #4: ffff8880b862c898 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0x109/0xca0 kernel/time/hrtimer.c:1300 #5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2317 [inline] #5: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2359 #6: ffffffff8e8134c0 (console_lock){+.+.}-{0:0}, at: _printk+0xd5/0x120 kernel/printk/printk.c:2432 #7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:342 [inline] #7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:267 [inline] #7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:288 [inline] #7: ffffffff8e8130d0 (console_srcu){....}-{0:0}, at: console_flush_all+0x1a3/0xeb0 kernel/printk/printk.c:3157 stack backtrace: CPU: 0 UID: 0 PID: 5227 Comm: syz-executor150 Not tainted 6.11.0-syzkaller-g88264981f208 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2203 check_prev_add kernel/locking/lockdep.c:3158 [inline] check_prevs_add kernel/locking/lockdep.c:3277 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3901 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 console_lock_spinning_enable kernel/printk/printk.c:1905 [inline] console_emit_next_record kernel/printk/printk.c:3086 [inline] console_flush_all+0x7f8/0xeb0 kernel/printk/printk.c:3180 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407 _printk+0xd5/0x120 kernel/printk/printk.c:2432 fail_dump lib/fault-inject.c:46 [inline] should_fail_ex+0x391/0x4e0 lib/fault-inject.c:154 strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline] ____bpf_probe_read_user_str kernel/trace/bpf_trace.c:224 [inline] bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:221 bpf_prog_99b56f93a3ca5fea+0x4b/0x4d bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2359 trace_hrtimer_start include/trace/events/timer.h:222 [inline] debug_activate kernel/time/hrtimer.c:479 [inline] enqueue_hrtimer+0x35a/0x3c0 kernel/time/hrtimer.c:1085 __hrtimer_start_range_ns kernel/time/hrtimer.c:1260 [inline] hrtimer_start_range_ns+0xac8/0xca0 kernel/time/hrtimer.c:1302 hrtimer_start include/linux/hrtimer.h:275 [inline] perf_swevent_start_hrtimer kernel/events/core.c:11254 [inline] cpu_clock_event_start kernel/events/core.c:11312 [inline] cpu_clock_event_add+0x180/0x1a0 kernel/events/core.c:11324 event_sched_in+0x832/0xe90 kernel/events/core.c:2620 group_sched_in kernel/events/core.c:2653 [inline] merge_sched_in kernel/events/core.c:3931 [inline] visit_groups_merge+0x1521/0x2fd0 kernel/events/core.c:3876 pmu_groups_sched_in kernel/events/core.c:3958 [inline] __pmu_ctx_sched_in+0x1aa/0x230 kernel/events/core.c:3970 ctx_sched_in+0x4c2/0x600 kernel/events/core.c:4021 ctx_resched+0x560/0x900 kernel/events/core.c:2807 __perf_install_in_context+0x647/0x850 kernel/events/core.c:2882 remote_function+0xef/0x170 kernel/events/core.c:92 csd_do_func kernel/smp.c:134 [inline] generic_exec_single+0x336/0x9b0 kernel/smp.c:433 smp_call_function_single+0x3fa/0x1990 kernel/smp.c:676 task_function_call kernel/events/core.c:120 [inline] perf_install_in_context+0x71a/0xb20 kernel/events/core.c:2985 __do_sys_perf_event_open kernel/events/core.c:13006 [inline] __se_sys_perf_event_open+0x31c5/0x38d0 kernel/events/core.c:12658 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe71c68c69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 1a 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc9dae96c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007ffc9dae96e0 RCX: 00007fbe71c68c69 RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000000000a0 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 CPU: 0 UID: 0 PID: 5227 Comm: syz-executor150 Not tainted 6.11.0-syzkaller-g88264981f208 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 fail_dump lib/fault-inject.c:53 [inline] should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154 strncpy_from_user+0x36/0x2e0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:215 [inline] ____bpf_probe_read_user_str kernel/trace/bpf_trace.c:224 [inline] bpf_probe_read_user_str+0x2a/0x70 kernel/trace/bpf_trace.c:221 bpf_prog_99b56f93a3ca5fea+0x4b/0x4d bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2359 trace_hrtimer_start include/trace/events/timer.h:222 [inline] debug_activate kernel/time/hrtimer.c:479 [inline] enqueue_hrtimer+0x35a/0x3c0 kernel/time/hrtimer.c:1085 __hrtimer_start_range_ns kernel/time/hrtimer.c:1260 [inline] hrtimer_start_range_ns+0xac8/0xca0 kernel/time/hrtimer.c:1302 hrtimer_start include/linux/hrtimer.h:275 [inline] perf_swevent_start_hrtimer kernel/events/core.c:11254 [inline] cpu_clock_event_start kernel/events/core.c:11312 [inline] cpu_clock_event_add+0x180/0x1a0 kernel/events/core.c:11324 event_sched_in+0x832/0xe90 kernel/events/core.c:2620 group_sched_in kernel/events/core.c:2653 [inline] merge_sched_in kernel/events/core.c:3931 [inline] visit_groups_merge+0x1521/0x2fd0 kernel/events/core.c:3876 pmu_groups_sched_in kernel/events/core.c:3958 [inline] __pmu_ctx_sched_in+0x1aa/0x230 kernel/events/core.c:3970 ctx_sched_in+0x4c2/0x600 kernel/events/core.c:4021 ctx_resched+0x560/0x900 kernel/events/core.c:2807 __perf_install_in_context+0x647/0x850 kernel/events/core.c:2882 remote_function+0xef/0x170 kernel/events/core.c:92 csd_do_func kernel/smp.c:134 [inline] generic_exec_single+0x336/0x9b0 kernel/smp.c:433 smp_call_function_single+0x3fa/0x1990 kernel/smp.c:676 task_function_call kernel/events/core.c:120 [inline] perf_install_in_context+0x71a/0xb20 kernel/events/core.c:2985 __do_sys_perf_event_open kernel/events/core.c:13006 [inline] __se_sys_perf_event_open+0x31c5/0x38d0 kernel/events/core.c:12658 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe71c68c69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 1a 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc9dae96c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007ffc9dae96e0 RCX: 00007fbe71c68c69 RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000000000a0 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001