Call Trace: ====================================================== WARNING: possible circular locking dependency detected 5.16.0-rc8-next-20220106 #1 Not tainted ------------------------------------------------------ syz-executor.3/300119 is trying to acquire lock: ffffffff851f5158 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0xe/0x60 kernel/locking/semaphore.c:138 but task is already holding lock: ffff888038d1a020 (&ctx->lock){-...}-{2:2}, at: __perf_install_in_context+0x12d/0x310 kernel/events/core.c:2784 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ctx->lock){-...}-{2:2}: __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 perf_event_context_sched_out kernel/events/core.c:3493 [inline] __perf_event_task_sched_out+0x519/0x1920 kernel/events/core.c:3601 perf_event_task_sched_out include/linux/perf_event.h:1245 [inline] prepare_task_switch kernel/sched/core.c:4796 [inline] context_switch kernel/sched/core.c:4938 [inline] __schedule+0xead/0x2190 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 exit_to_user_mode_loop kernel/entry/common.c:163 [inline] exit_to_user_mode_prepare+0x114/0x1c0 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:300 do_syscall_64+0x48/0x90 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #2 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:489 raw_spin_rq_lock kernel/sched/sched.h:1318 [inline] rq_lock kernel/sched/sched.h:1616 [inline] task_fork_fair+0x63/0x4d0 kernel/sched/fair.c:11146 sched_post_fork+0x343/0x490 kernel/sched/core.c:4462 copy_process+0x5353/0x6e20 kernel/fork.c:2394 kernel_clone+0xe7/0xa60 kernel/fork.c:2620 kernel_thread+0xae/0xf0 kernel/fork.c:2672 rest_init+0x24/0x3d0 init/main.c:692 start_kernel+0x484/0x4a5 init/main.c:1141 secondary_startup_64_no_verify+0xd5/0xdb -> #1 (&p->pi_lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 try_to_wake_up+0xac/0x14c0 kernel/sched/core.c:4017 up+0x75/0xb0 kernel/locking/semaphore.c:190 __up_console_sem+0x6e/0x80 kernel/printk/printk.c:255 console_unlock+0x53e/0xae0 kernel/printk/printk.c:2730 vprintk_emit+0x198/0x450 kernel/printk/printk.c:2248 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50 _printk+0xba/0xed kernel/printk/printk.c:2269 kauditd_printk_skb kernel/audit.c:538 [inline] kauditd_hold_skb.cold+0x41/0x50 kernel/audit.c:571 kauditd_send_queue kernel/audit.c:734 [inline] kauditd_thread+0x86b/0x1080 kernel/audit.c:858 kthread+0x2f0/0x3a0 kernel/kthread.c:377 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:295 -> #0 ((console_sem).lock){-.-.}-{2:2}: check_prev_add kernel/locking/lockdep.c:3063 [inline] check_prevs_add kernel/locking/lockdep.c:3186 [inline] validate_chain kernel/locking/lockdep.c:3801 [inline] __lock_acquire+0x2a14/0x5b70 kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1a2/0x4d0 kernel/locking/lockdep.c:5604 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 down_trylock+0xe/0x60 kernel/locking/semaphore.c:138 __down_trylock_console_sem+0x3b/0xd0 kernel/printk/printk.c:238 console_trylock kernel/printk/printk.c:2545 [inline] console_trylock_spinning kernel/printk/printk.c:1846 [inline] vprintk_emit+0x146/0x450 kernel/printk/printk.c:2247 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50 _printk+0xba/0xed kernel/printk/printk.c:2269 show_trace_log_lvl+0x57/0x2bb arch/x86/kernel/dumpstack.c:195 ex_handler_msr+0x311/0x3a0 arch/x86/mm/extable.c:101 fixup_exception+0x1ca/0xdd0 arch/x86/mm/extable.c:212 __exc_general_protection arch/x86/kernel/traps.c:601 [inline] exc_general_protection+0xed/0x2f0 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:562 __wrmsr arch/x86/include/asm/msr.h:103 [inline] native_write_msr arch/x86/include/asm/msr.h:154 [inline] wrmsrl arch/x86/include/asm/msr.h:271 [inline] __x86_pmu_enable_event arch/x86/events/perf_event.h:1122 [inline] x86_pmu_enable_all+0x132/0x3c0 arch/x86/events/core.c:743 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350 perf_pmu_enable kernel/events/core.c:1207 [inline] perf_pmu_enable kernel/events/core.c:1203 [inline] ctx_resched+0x2b0/0x390 kernel/events/core.c:2754 __perf_install_in_context+0x285/0x310 kernel/events/core.c:2821 remote_function kernel/events/core.c:91 [inline] remote_function+0x125/0x1b0 kernel/events/core.c:71 generic_exec_single+0x203/0x300 kernel/smp.c:518 smp_call_function_single+0x189/0x460 kernel/smp.c:755 task_function_call+0xe5/0x170 kernel/events/core.c:119 perf_install_in_context+0x2cb/0x550 kernel/events/core.c:2922 __do_sys_perf_event_open+0x1bf0/0x3040 kernel/events/core.c:12433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae other info that might help us debug this: Chain exists of: (console_sem).lock --> &rq->__lock --> &ctx->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ctx->lock); lock(&rq->__lock); lock(&ctx->lock); lock((console_sem).lock); *** DEADLOCK *** 4 locks held by syz-executor.3/300119: #0: ffff8880174fd6e0 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0x1023/0x3040 kernel/events/core.c:12273 #1: ffff888038d1a0b0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x17cd/0x3040 kernel/events/core.c:12327 #2: ffff88806ce3ee20 (&cpuctx_lock){-.-.}-{2:2}, at: __perf_install_in_context+0xf4/0x310 kernel/events/core.c:2782 #3: ffff888038d1a020 (&ctx->lock){-...}-{2:2}, at: __perf_install_in_context+0x12d/0x310 kernel/events/core.c:2784 stack backtrace: CPU: 0 PID: 300119 Comm: syz-executor.3 Not tainted 5.16.0-rc8-next-20220106 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8b/0xb3 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2143 check_prev_add kernel/locking/lockdep.c:3063 [inline] check_prevs_add kernel/locking/lockdep.c:3186 [inline] validate_chain kernel/locking/lockdep.c:3801 [inline] __lock_acquire+0x2a14/0x5b70 kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1a2/0x4d0 kernel/locking/lockdep.c:5604 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 down_trylock+0xe/0x60 kernel/locking/semaphore.c:138 __down_trylock_console_sem+0x3b/0xd0 kernel/printk/printk.c:238 console_trylock kernel/printk/printk.c:2545 [inline] console_trylock_spinning kernel/printk/printk.c:1846 [inline] vprintk_emit+0x146/0x450 kernel/printk/printk.c:2247 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50 _printk+0xba/0xed kernel/printk/printk.c:2269 show_trace_log_lvl+0x57/0x2bb arch/x86/kernel/dumpstack.c:195 ex_handler_msr+0x311/0x3a0 arch/x86/mm/extable.c:101 fixup_exception+0x1ca/0xdd0 arch/x86/mm/extable.c:212 __exc_general_protection arch/x86/kernel/traps.c:601 [inline] exc_general_protection+0xed/0x2f0 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:562 RIP: 0010:__wrmsr arch/x86/include/asm/msr.h:103 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:154 [inline] RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:271 [inline] RIP: 0010:__x86_pmu_enable_event arch/x86/events/perf_event.h:1122 [inline] RIP: 0010:x86_pmu_enable_all+0x132/0x3c0 arch/x86/events/core.c:743 Code: f7 d7 49 21 c7 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 64 02 00 00 48 8b 9b 78 01 00 00 4c 89 fa 44 89 f8 48 c1 ea 20 89 d9 <0f> 30 0f 1f 44 00 00 e8 a2 40 42 00 e8 9d 40 42 00 8b 1d 83 9d 8b RSP: 0018:ffff888016f37968 EFLAGS: 00010016 RAX: 0000000000530076 RBX: 00000000c0010200 RCX: 00000000c0010200 RDX: 0000000000000100 RSI: ffffffff8100de36 RDI: ffff888018468178 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8100de25 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88806ce21c20 R14: ffff88806ce21e20 R15: 0000010000530076 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350 perf_pmu_enable kernel/events/core.c:1207 [inline] perf_pmu_enable kernel/events/core.c:1203 [inline] ctx_resched+0x2b0/0x390 kernel/events/core.c:2754 __perf_install_in_context+0x285/0x310 kernel/events/core.c:2821 remote_function kernel/events/core.c:91 [inline] remote_function+0x125/0x1b0 kernel/events/core.c:71 generic_exec_single+0x203/0x300 kernel/smp.c:518 smp_call_function_single+0x189/0x460 kernel/smp.c:755 task_function_call+0xe5/0x170 kernel/events/core.c:119 perf_install_in_context+0x2cb/0x550 kernel/events/core.c:2922 __do_sys_perf_event_open+0x1bf0/0x3040 kernel/events/core.c:12433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f805686cb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8053de2188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f805697ff60 RCX: 00007f805686cb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000a00 RBP: 00007f80568c6f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe73f4567f R14: 00007f8053de2300 R15: 0000000000022000 x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350 perf_pmu_enable kernel/events/core.c:1207 [inline] perf_pmu_enable kernel/events/core.c:1203 [inline] ctx_resched+0x2b0/0x390 kernel/events/core.c:2754 __perf_install_in_context+0x285/0x310 kernel/events/core.c:2821 remote_function kernel/events/core.c:91 [inline] remote_function+0x125/0x1b0 kernel/events/core.c:71 generic_exec_single+0x203/0x300 kernel/smp.c:518 smp_call_function_single+0x189/0x460 kernel/smp.c:755 task_function_call+0xe5/0x170 kernel/events/core.c:119 perf_install_in_context+0x2cb/0x550 kernel/events/core.c:2922 __do_sys_perf_event_open+0x1bf0/0x3040 kernel/events/core.c:12433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f805686cb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8053de2188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f805697ff60 RCX: 00007f805686cb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000a00 RBP: 00007f80568c6f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe73f4567f R14: 00007f8053de2300 R15: 0000000000022000 hpet: Lost 9 RTC interrupts Call Trace: x86_pmu_enable+0x580/0xd90 arch/x86/events/core.c:1350 perf_pmu_enable kernel/events/core.c:1207 [inline] perf_pmu_enable kernel/events/core.c:1203 [inline] perf_event_context_sched_out kernel/events/core.c:3500 [inline] __perf_event_task_sched_out+0x764/0x1920 kernel/events/core.c:3601 perf_event_task_sched_out include/linux/perf_event.h:1245 [inline] prepare_task_switch kernel/sched/core.c:4796 [inline] context_switch kernel/sched/core.c:4938 [inline] __schedule+0xead/0x2190 kernel/sched/core.c:6296 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6462 __cond_resched+0x13/0x20 kernel/sched/core.c:8175 might_resched include/linux/kernel.h:110 [inline] __mutex_lock_common kernel/locking/mutex.c:577 [inline] __mutex_lock+0xa3/0x1480 kernel/locking/mutex.c:733 __do_sys_perf_event_open+0x1d13/0x3040 kernel/events/core.c:12445 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f805686cb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8053de2188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f805697ff60 RCX: 00007f805686cb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000a00 RBP: 00007f80568c6f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe73f4567f R14: 00007f8053de2300 R15: 0000000000022000 Call Trace: x86_pmu_stop+0x149/0x330 arch/x86/events/core.c:1597 x86_pmu_del+0x1be/0x610 arch/x86/events/core.c:1636 event_sched_out+0x2ed/0xaf0 kernel/events/core.c:2289 __perf_remove_from_context+0x88/0x830 kernel/events/core.c:2356 event_function+0x297/0x3d0 kernel/events/core.c:253 remote_function kernel/events/core.c:91 [inline] remote_function+0x125/0x1b0 kernel/events/core.c:71 flush_smp_call_function_queue+0x1df/0x610 kernel/smp.c:628 __sysvec_call_function_single+0x92/0x3a0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646 RIP: 0010:finish_task_switch.isra.0+0x230/0x870 kernel/sched/core.c:4866 Code: 89 f7 48 c7 03 00 00 00 00 0f ae e8 ff d2 4d 85 e4 75 ba 4c 89 f7 e8 af 84 e9 02 e8 ea 6f 2a 00 fb 65 48 8b 1c 25 40 6f 02 00 <48> 8d bb 40 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff8880081afd78 EFLAGS: 00000246 RAX: 0000000000000007 RBX: ffff888008193580 RCX: 1ffffffff0b195b9 RDX: 0000000000000000 RSI: ffffffff8149ea21 RDI: ffffffff811f79e6 RBP: ffff8880081afdb8 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8149ea08 R11: 0000000000000001 R12: ffffffff858cadcc R13: ffff88803924d040 R14: ffff88806ce37a40 R15: ffff88806ce37a58 context_switch kernel/sched/core.c:4989 [inline] __schedule+0x88a/0x2190 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 smpboot_thread_fn+0x2f3/0xa00 kernel/smpboot.c:160 kthread+0x2f0/0x3a0 kernel/kthread.c:377 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:295 hpet: Lost 2 RTC interrupts nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' nfs: Unknown parameter 'T/"/!&]&' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' loop1: detected capacity change from 0 to 6 FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 7) failed FAT-fs (loop1): Directory bread(block 8) failed FAT-fs (loop1): Directory bread(block 9) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 7) failed FAT-fs (loop1): Directory bread(block 8) failed FAT-fs (loop1): Directory bread(block 9) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 7) failed syz-executor.1: attempt to access beyond end of device loop1: rw=2049, want=122, limit=6 syz-executor.1: attempt to access beyond end of device loop1: rw=2049, want=18, limit=6 loop1: detected capacity change from 0 to 6 FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 7) failed FAT-fs (loop1): Directory bread(block 8) failed FAT-fs (loop1): Directory bread(block 9) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 7) failed FAT-fs (loop1): Directory bread(block 8) failed FAT-fs (loop1): Directory bread(block 9) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 7) failed syz-executor.1: attempt to access beyond end of device loop1: rw=2049, want=122, limit=6 syz-executor.1: attempt to access beyond end of device loop1: rw=2049, want=18, limit=6 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. device syz_tun entered promiscuous mode device syz_tun left promiscuous mode device syz_tun entered promiscuous mode device syz_tun left promiscuous mode netlink: 188 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 188 bytes leftover after parsing attributes in process `syz-executor.6'. program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO netlink: 188 bytes leftover after parsing attributes in process `syz-executor.6'. program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO netlink: 188 bytes leftover after parsing attributes in process `syz-executor.6'. program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.1 is using a deprecated SCSI ioctl, please convert it to SG_IO ---------------- Code disassembly (best guess): 0: f7 d7 not %edi 2: 49 21 c7 and %rax,%r15 5: 48 89 f8 mov %rdi,%rax 8: 48 c1 e8 03 shr $0x3,%rax c: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 11: 0f 85 64 02 00 00 jne 0x27b 17: 48 8b 9b 78 01 00 00 mov 0x178(%rbx),%rbx 1e: 4c 89 fa mov %r15,%rdx 21: 44 89 f8 mov %r15d,%eax 24: 48 c1 ea 20 shr $0x20,%rdx 28: 89 d9 mov %ebx,%ecx * 2a: 0f 30 wrmsr <-- trapping instruction 2c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 31: e8 a2 40 42 00 callq 0x4240d8 36: e8 9d 40 42 00 callq 0x4240d8 3b: 8b .byte 0x8b 3c: 1d .byte 0x1d 3d: 83 .byte 0x83 3e: 9d popfq 3f: 8b .byte 0x8b