====================================================== WARNING: possible circular locking dependency detected 4.14.307-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/11159 is trying to acquire lock: (event_mutex){+.+.}, at: [] ftrace_profile_set_filter+0x64/0x1c0 kernel/trace/trace_events_filter.c:2268 but task is already holding lock: (&cpuctx_mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x14d/0x2c0 kernel/events/core.c:1241 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&cpuctx_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 perf_event_init_cpu+0xb7/0x170 kernel/events/core.c:11293 perf_event_init+0x2cc/0x308 kernel/events/core.c:11340 start_kernel+0x45d/0x763 init/main.c:624 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 -> #3 (pmus_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 perf_event_init_cpu+0x2c/0x170 kernel/events/core.c:11287 cpuhp_invoke_callback+0x1e6/0x1a80 kernel/cpu.c:186 cpuhp_up_callbacks kernel/cpu.c:574 [inline] _cpu_up+0x21e/0x520 kernel/cpu.c:1193 do_cpu_up+0x9a/0x160 kernel/cpu.c:1229 smp_init+0x197/0x1ac kernel/smp.c:578 kernel_init_freeable+0x406/0x626 init/main.c:1074 kernel_init+0xd/0x166 init/main.c:1006 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 -> #2 (cpu_hotplug_lock.rw_sem){++++}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x39/0xc0 kernel/cpu.c:297 static_key_slow_inc+0xe/0x20 kernel/jump_label.c:123 tracepoint_add_func+0x747/0xa40 kernel/tracepoint.c:269 tracepoint_probe_register_prio kernel/tracepoint.c:331 [inline] tracepoint_probe_register+0x8c/0xc0 kernel/tracepoint.c:352 trace_event_reg+0x272/0x330 kernel/trace/trace_events.c:305 perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] perf_trace_init+0x424/0xa30 kernel/trace/trace_event_perf.c:221 perf_tp_event_init+0x79/0xf0 kernel/events/core.c:8145 perf_try_init_event+0x15b/0x1f0 kernel/events/core.c:9381 perf_init_event kernel/events/core.c:9419 [inline] perf_event_alloc.part.0+0xe2d/0x2640 kernel/events/core.c:9679 perf_event_alloc kernel/events/core.c:10049 [inline] SYSC_perf_event_open kernel/events/core.c:10153 [inline] SyS_perf_event_open+0x683/0x2530 kernel/events/core.c:10039 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #1 (tracepoints_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 tracepoint_probe_register_prio kernel/tracepoint.c:327 [inline] tracepoint_probe_register+0x68/0xc0 kernel/tracepoint.c:352 trace_event_reg+0x272/0x330 kernel/trace/trace_events.c:305 perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] perf_trace_init+0x424/0xa30 kernel/trace/trace_event_perf.c:221 perf_tp_event_init+0x79/0xf0 kernel/events/core.c:8145 perf_try_init_event+0x15b/0x1f0 kernel/events/core.c:9381 perf_init_event kernel/events/core.c:9419 [inline] perf_event_alloc.part.0+0xe2d/0x2640 kernel/events/core.c:9679 perf_event_alloc kernel/events/core.c:10049 [inline] SYSC_perf_event_open kernel/events/core.c:10153 [inline] SyS_perf_event_open+0x683/0x2530 kernel/events/core.c:10039 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (event_mutex){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 ftrace_profile_set_filter+0x64/0x1c0 kernel/trace/trace_events_filter.c:2268 perf_event_set_filter kernel/events/core.c:8729 [inline] _perf_ioctl+0x12b3/0x1a60 kernel/events/core.c:4852 perf_ioctl+0x55/0x80 kernel/events/core.c:4889 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 other info that might help us debug this: Chain exists of: event_mutex --> pmus_lock --> &cpuctx_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&cpuctx_mutex); lock(pmus_lock); lock(&cpuctx_mutex); lock(event_mutex); *** DEADLOCK *** 1 lock held by syz-executor.1/11159: #0: (&cpuctx_mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x14d/0x2c0 kernel/events/core.c:1241 stack backtrace: CPU: 1 PID: 11159 Comm: syz-executor.1 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 ftrace_profile_set_filter+0x64/0x1c0 kernel/trace/trace_events_filter.c:2268 perf_event_set_filter kernel/events/core.c:8729 [inline] _perf_ioctl+0x12b3/0x1a60 kernel/events/core.c:4852 perf_ioctl+0x55/0x80 kernel/events/core.c:4889 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f283beb70f9 RSP: 002b:00007f283a429168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f283bfd6f80 RCX: 00007f283beb70f9 RDX: 0000000020000000 RSI: 0000000040082406 RDI: 0000000000000003 RBP: 00007f283bf12ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc00f31caf R14: 00007f283a429300 R15: 0000000000022000 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop5 BTRFS info (device loop5): unrecognized mount option 'ref_verify' BTRFS error (device loop5): open_ctree failed audit: type=1800 audit(1677965095.188:4): pid=11306 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14126 res=0 audit: type=1800 audit(1677965095.208:5): pid=11306 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14126 res=0 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns BTRFS info (device loop5): unrecognized mount option 'ref_verify' BTRFS error (device loop5): open_ctree failed audit: type=1800 audit(1677965096.088:6): pid=11333 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14135 res=0 audit: type=1800 audit(1677965096.098:7): pid=11333 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14135 res=0 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns BTRFS info (device loop5): unrecognized mount option 'ref_verify' BTRFS error (device loop5): open_ctree failed unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 audit: type=1800 audit(1677965097.208:8): pid=11394 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14126 res=0 audit: type=1800 audit(1677965097.208:9): pid=11394 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14126 res=0 XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount XFS (loop1): Unmounting Filesystem BTRFS info (device loop5): unrecognized mount option 'ref_verify' BTRFS error (device loop5): open_ctree failed audit: type=1800 audit(1677965098.128:10): pid=11483 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14084 res=0 audit: type=1800 audit(1677965098.158:11): pid=11483 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14084 res=0 XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount XFS (loop1): Unmounting Filesystem Disabled LAPIC found during irq injection netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount XFS (loop1): Unmounting Filesystem F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 audit: type=1804 audit(1677965099.658:12): pid=11658 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir3928126204/syzkaller.WMh6XU/110/file0/bus" dev="loop0" ino=10 res=1 attempt to access beyond end of device loop0: rw=10241, want=53256, limit=40427 XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount XFS (loop1): Unmounting Filesystem audit: type=1804 audit(1677965099.968:13): pid=11719 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2547291358/syzkaller.v1EsIc/110/file0" dev="sda1" ino=14105 res=1 F2FS-fs (loop3): Found nat_bits in checkpoint F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 kauditd_printk_skb: 1 callbacks suppressed audit: type=1804 audit(1677965100.268:15): pid=11710 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir2780303553/syzkaller.W620tx/125/file0/bus" dev="loop3" ino=10 res=1 attempt to access beyond end of device loop3: rw=10241, want=53256, limit=40427 F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 audit: type=1804 audit(1677965100.568:16): pid=11738 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir3928126204/syzkaller.WMh6XU/111/file0/bus" dev="loop0" ino=10 res=1 attempt to access beyond end of device loop0: rw=10241, want=53256, limit=40427 F2FS-fs (loop3): Found nat_bits in checkpoint F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 audit: type=1804 audit(1677965101.098:17): pid=11767 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir2780303553/syzkaller.W620tx/126/file0/bus" dev="loop3" ino=10 res=1 attempt to access beyond end of device loop3: rw=10241, want=53256, limit=40427 F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 audit: type=1804 audit(1677965101.328:18): pid=11797 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir3928126204/syzkaller.WMh6XU/112/file0/bus" dev="loop0" ino=10 res=1 attempt to access beyond end of device loop0: rw=10241, want=53256, limit=40427 audit: type=1804 audit(1677965101.768:19): pid=11821 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir2780303553/syzkaller.W620tx/127/file0/bus" dev="loop3" ino=10 res=1 attempt to access beyond end of device loop3: rw=10241, want=53256, limit=40427 audit: type=1804 audit(1677965101.968:20): pid=11853 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir3928126204/syzkaller.WMh6XU/113/file0/bus" dev="loop0" ino=10 res=1 attempt to access beyond end of device loop0: rw=10241, want=53256, limit=40427 capability: warning: `syz-executor.2' uses 32-bit capabilities (legacy support in use)