program:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup.cpu/test\x00', 0x777)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./cgroup.cpu/test/memory.limit_in_bytes\x00', 0x2, 0x0)
write(r0, &(0x7f0000000180)='10000', 0x5)
r1 = openat(0xffffffffffffff9c, &(0x7f00000001c0)='./cgroup.cpu/test/memory.oom_control\x00', 0x2, 0x0)
write(r1, &(0x7f0000000200)='1', 0x1)
r2 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./cgroup.cpu/test/cgroup.procs\x00', 0x2, 0x0)
write(r2, &(0x7f0000000280)='0', 0x1)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./tracefs\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./tracefs\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./tracefs/instances/foo\x00', 0x1ff)
[ 154.251469][ T5290] Bluetooth: hci0: command tx timeout
[ 154.341436][ T5325] oom_control is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[ 154.418353][ T5325] Could not create tracefs 'show_event_triggers' entry
[ 154.462667][ T5325] Could not create tracefs 'set_event_pid' entry
[ 154.497022][ T5325] Could not create tracefs 'set_event_notrace_pid' entry
[ 154.526442][ T5325] ------------[ cut here ]------------
[ 154.528952][ T5325] !list_empty(&ei->children)
[ 154.528966][ T5325] WARNING: fs/tracefs/event_inode.c:128 at free_ei+0x284/0x340, CPU#0: syz.0.0/5325
[ 154.535233][ T5325] Modules linked in:
[ 154.536930][ T5325] CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 154.540517][ T5325] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 154.544625][ T5325] RIP: 0010:free_ei+0x284/0x340
[ 154.546713][ T5325] Code: 48 c7 c7 20 87 32 8f 48 89 de 48 c7 c2 80 67 df 83 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d e9 72 dd cb fd e8 ad c9 e7 fd 90 <0f> 0b 90 e9 c7 fd ff ff e8 9f c9 e7 fd 90 0f 0b 90 48 b8 00 00 00
[ 154.554802][ T5325] RSP: 0018:ffffc90006e4fa88 EFLAGS: 00010287
[ 154.557439][ T5325] RAX: ffffffff83df6b13 RBX: ffff888037c7a190 RCX: 0000000000100000
[ 154.560764][ T5325] RDX: ffffc9000f642000 RSI: 000000000007f058 RDI: 000000000007f059
[ 154.563952][ T5325] RBP: ffff888037c7a180 R08: 00000000ffffffff R09: 1ffffffff20f1f46
[ 154.567132][ T5325] R10: dffffc0000000000 R11: fffffbfff20f1f47 R12: 0000000000000000
[ 154.570632][ T5325] R13: ffff888011fcc800 R14: ffff888037c7a180 R15: 0000000000000003
[ 154.574377][ T5325] FS: 00007f4597c5c6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
[ 154.579374][ T5325] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 154.582168][ T5325] CR2: 00007f4596ff36b8 CR3: 0000000012f9b000 CR4: 0000000000352ef0
[ 154.585476][ T5325] Call Trace:
[ 154.586744][ T5325]
[ 154.587937][ T5325] ? new_inode+0x13a/0x170
[ 154.589854][ T5325] ? tracefs_get_inode+0x11/0x80
[ 154.592003][ T5325] eventfs_create_events_dir+0x7c4/0x9f0
[ 154.594374][ T5325] create_event_toplevel_files+0x11e/0x1a0
[ 154.596923][ T5325] event_trace_add_tracer+0x8a/0x3b0
[ 154.599355][ T5325] trace_array_create_dir+0x77/0x160
[ 154.601607][ T5325] trace_array_create_systems+0xb3c/0xe60
[ 154.604005][ T5325] instance_mkdir+0xd5/0x140
[ 154.605942][ T5325] tracefs_syscall_mkdir+0x11a/0x190
[ 154.608187][ T5325] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 154.610691][ T5325] ? generic_permission+0x2bf/0x670
[ 154.612934][ T5325] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 154.615020][ T5325] vfs_mkdir+0x40c/0x620
[ 154.616809][ T5325] filename_mkdirat+0x285/0x510
[ 154.618941][ T5325] ? __pfx_filename_mkdirat+0x10/0x10
[ 154.621103][ T5325] ? do_getname+0x151/0x250
[ 154.622958][ T5325] __se_sys_mkdirat+0x35/0x150
[ 154.624968][ T5325] do_syscall_64+0x166/0x520
[ 154.626926][ T5325] ? trace_irq_disable+0x3b/0x140
[ 154.629260][ T5325] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 154.631869][ T5325] ? clear_bhb_loop+0x70/0xc0
[ 154.633841][ T5325] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 154.636534][ T5325] RIP: 0033:0x7f4596d9e0d9
[ 154.638372][ T5325] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
[ 154.647265][ T5325] RSP: 002b:00007f4597c5bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 154.650940][ T5325] RAX: ffffffffffffffda RBX: 00007f4597025fa0 RCX: 00007f4596d9e0d9
[ 154.654341][ T5325] RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 154.657685][ T5325] RBP: 00007f4596e35024 R08: 0000000000000000 R09: 0000000000000000
[ 154.661157][ T5325] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 154.664619][ T5325] R13: 00007f4597026038 R14: 00007f4597025fa0 R15: 00007fff44f90d38
[ 154.668022][ T5325]
[ 154.669397][ T5325] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 154.672479][ T5325] CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 154.676220][ T5325] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 154.680474][ T5325] Call Trace:
[ 154.681951][ T5325]
[ 154.683171][ T5325] vpanic+0x56d/0xa60
[ 154.684989][ T5325] ? __pfx__printk+0x10/0x10
[ 154.687183][ T5325] ? __pfx_vpanic+0x10/0x10
[ 154.689199][ T5325] ? is_bpf_text_address+0x292/0x2b0
[ 154.691747][ T5325] ? is_bpf_text_address+0x26/0x2b0
[ 154.694674][ T5325] panic+0xc5/0xd0
[ 154.696737][ T5325] ? __pfx_panic+0x10/0x10
[ 154.698704][ T5325] __warn+0x315/0x4c0
[ 154.700433][ T5325] ? free_ei+0x284/0x340
[ 154.702251][ T5325] ? free_ei+0x284/0x340
[ 154.704086][ T5325] __report_bug+0x276/0x570
[ 154.706050][ T5325] ? free_ei+0x284/0x340
[ 154.707898][ T5325] ? __pfx___report_bug+0x10/0x10
[ 154.710023][ T5325] ? irqentry_exit+0x218/0x910
[ 154.712081][ T5325] ? irqentry_exit+0x218/0x910
[ 154.714207][ T5325] ? trace_irq_disable+0x3b/0x140
[ 154.716334][ T5325] ? free_ei+0x284/0x340
[ 154.718181][ T5325] report_bug+0x16b/0x220
[ 154.720069][ T5325] ? free_ei+0x284/0x340
[ 154.721911][ T5325] ? free_ei+0x286/0x340
[ 154.723721][ T5325] handle_bug+0x9c/0x200
[ 154.725553][ T5325] exc_invalid_op+0x1a/0x50
[ 154.727473][ T5325] asm_exc_invalid_op+0x1a/0x20
[ 154.729586][ T5325] RIP: 0010:free_ei+0x284/0x340
[ 154.731729][ T5325] Code: 48 c7 c7 20 87 32 8f 48 89 de 48 c7 c2 80 67 df 83 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d e9 72 dd cb fd e8 ad c9 e7 fd 90 <0f> 0b 90 e9 c7 fd ff ff e8 9f c9 e7 fd 90 0f 0b 90 48 b8 00 00 00
[ 154.739801][ T5325] RSP: 0018:ffffc90006e4fa88 EFLAGS: 00010287
[ 154.742341][ T5325] RAX: ffffffff83df6b13 RBX: ffff888037c7a190 RCX: 0000000000100000
[ 154.745718][ T5325] RDX: ffffc9000f642000 RSI: 000000000007f058 RDI: 000000000007f059
[ 154.749098][ T5325] RBP: ffff888037c7a180 R08: 00000000ffffffff R09: 1ffffffff20f1f46
[ 154.752569][ T5325] R10: dffffc0000000000 R11: fffffbfff20f1f47 R12: 0000000000000000
[ 154.756319][ T5325] R13: ffff888011fcc800 R14: ffff888037c7a180 R15: 0000000000000003
[ 154.759689][ T5325] ? free_ei+0x283/0x340
[ 154.761513][ T5325] ? free_ei+0x283/0x340
[ 154.763382][ T5325] ? new_inode+0x13a/0x170
[ 154.765375][ T5325] ? tracefs_get_inode+0x11/0x80
[ 154.767510][ T5325] eventfs_create_events_dir+0x7c4/0x9f0
[ 154.769988][ T5325] create_event_toplevel_files+0x11e/0x1a0
[ 154.772535][ T5325] event_trace_add_tracer+0x8a/0x3b0
[ 154.774871][ T5325] trace_array_create_dir+0x77/0x160
[ 154.777198][ T5325] trace_array_create_systems+0xb3c/0xe60
[ 154.779593][ T5325] instance_mkdir+0xd5/0x140
[ 154.781592][ T5325] tracefs_syscall_mkdir+0x11a/0x190
[ 154.783831][ T5325] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 154.786197][ T5325] ? generic_permission+0x2bf/0x670
[ 154.788395][ T5325] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 154.790548][ T5325] vfs_mkdir+0x40c/0x620
[ 154.792449][ T5325] filename_mkdirat+0x285/0x510
[ 154.794556][ T5325] ? __pfx_filename_mkdirat+0x10/0x10
[ 154.796666][ T5325] ? do_getname+0x151/0x250
[ 154.798652][ T5325] __se_sys_mkdirat+0x35/0x150
[ 154.800701][ T5325] do_syscall_64+0x166/0x520
[ 154.802600][ T5325] ? trace_irq_disable+0x3b/0x140
[ 154.804666][ T5325] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 154.807184][ T5325] ? clear_bhb_loop+0x70/0xc0
[ 154.809073][ T5325] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 154.811523][ T5325] RIP: 0033:0x7f4596d9e0d9
[ 154.813488][ T5325] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
[ 154.821944][ T5325] RSP: 002b:00007f4597c5bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 154.825478][ T5325] RAX: ffffffffffffffda RBX: 00007f4597025fa0 RCX: 00007f4596d9e0d9
[ 154.828741][ T5325] RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 154.831795][ T5325] RBP: 00007f4596e35024 R08: 0000000000000000 R09: 0000000000000000
[ 154.834880][ T5325] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 154.837892][ T5325] R13: 00007f4597026038 R14: 00007f4597025fa0 R15: 00007fff44f90d38
[ 154.840874][ T5325]
[ 154.842572][ T5325] Kernel Offset: disabled
[ 154.844390][ T5325] Rebooting in 86400 seconds..