program:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/test\x00', 0x777)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./cgroup.cpu/test/memory.limit_in_bytes\x00', 0x2, 0x0)
write(r0, &(0x7f0000000380)='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)='./tracing\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./tracing\x00', &(0x7f00000000c0)='tracefs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./tracing/instances/inst1\x00', 0x1ff)
[ 94.770566][ T4637] Bluetooth: hci0: command tx timeout
[ 95.076602][ T5311] oom_control is deprecated and will be removed. Please report your usecase to linux-mm-@kvack.org if you depend on this functionality.
[ 95.211814][ T5311] Could not create tracefs 'show_event_triggers' entry
[ 95.244299][ T5311] Could not create tracefs 'set_event_pid' entry
[ 95.274432][ T5311] Could not create tracefs 'set_event_notrace_pid' entry
[ 95.296833][ T5311] ------------[ cut here ]------------
[ 95.300464][ T5311] !list_empty(&ei->children)
[ 95.300482][ T5311] WARNING: fs/tracefs/event_inode.c:128 at free_ei+0x284/0x340, CPU#0: syz.0.0/5311
[ 95.308138][ T5311] Modules linked in:
[ 95.310509][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 95.314912][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 95.318986][ T5311] RIP: 0010:free_ei+0x284/0x340
[ 95.321094][ T5311] Code: 48 c7 c7 c0 e3 11 8f 48 89 de 48 c7 c2 80 6d da 83 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d e9 92 ea d0 fd e8 9d a0 ec fd 90 <0f> 0b 90 e9 c7 fd ff ff e8 8f a0 ec fd 90 0f 0b 90 48 b8 00 00 00
[ 95.329449][ T5311] RSP: 0018:ffffc9000ee8fa88 EFLAGS: 00010283
[ 95.332402][ T5311] RAX: ffffffff83da7113 RBX: ffff88801fca2d10 RCX: 0000000000100000
[ 95.336273][ T5311] RDX: ffffc9000f641000 RSI: 00000000000794fc RDI: 00000000000794fd
[ 95.340006][ T5311] RBP: ffff88801fca2d00 R08: 00000000ffffffff R09: 1ffffffff20aee06
[ 95.343657][ T5311] R10: dffffc0000000000 R11: fffffbfff20aee07 R12: 0000000000000000
[ 95.347344][ T5311] R13: ffff888052728800 R14: ffff88801fca2d00 R15: 0000000000000003
[ 95.351845][ T5311] FS: 00007f8aa31da6c0(0000) GS:ffff88808c547000(0000) knlGS:0000000000000000
[ 95.355792][ T5311] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 95.358907][ T5311] CR2: 00007f8aa31e3230 CR3: 000000001fc57000 CR4: 0000000000352ef0
[ 95.362438][ T5311] Call Trace:
[ 95.364072][ T5311]
[ 95.365402][ T5311] ? new_inode+0x13a/0x170
[ 95.367746][ T5311] ? tracefs_get_inode+0x11/0x80
[ 95.370271][ T5311] eventfs_create_events_dir+0x7c4/0x9f0
[ 95.372764][ T5311] create_event_toplevel_files+0x11e/0x1a0
[ 95.375341][ T5311] event_trace_add_tracer+0x8a/0x3b0
[ 95.378312][ T5311] trace_array_create_dir+0x77/0x160
[ 95.382029][ T5311] trace_array_create_systems+0xb3c/0xe60
[ 95.385013][ T5311] instance_mkdir+0xd5/0x140
[ 95.387063][ T5311] tracefs_syscall_mkdir+0x11a/0x190
[ 95.389501][ T5311] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 95.392038][ T5311] ? generic_permission+0x2bf/0x670
[ 95.394167][ T5311] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 95.396251][ T5311] vfs_mkdir+0x406/0x620
[ 95.398093][ T5311] filename_mkdirat+0x285/0x510
[ 95.400972][ T5311] ? __pfx_filename_mkdirat+0x10/0x10
[ 95.404479][ T5311] ? do_getname+0x151/0x250
[ 95.406409][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.409078][ T5311] __se_sys_mkdirat+0x35/0x150
[ 95.411459][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.414380][ T5311] do_syscall_64+0x174/0x580
[ 95.416911][ T5311] ? trace_irq_disable+0x3b/0x140
[ 95.419447][ T5311] ? clear_bhb_loop+0x70/0xc0
[ 95.421638][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.424229][ T5311] RIP: 0033:0x7f8aa239e0d9
[ 95.426357][ T5311] 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
[ 95.434932][ T5311] RSP: 002b:00007f8aa31d9fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 95.438135][ T5311] RAX: ffffffffffffffda RBX: 00007f8aa2625fa0 RCX: 00007f8aa239e0d9
[ 95.441606][ T5311] RDX: 00000000000001ff RSI: 0000200000000100 RDI: ffffffffffffff9c
[ 95.445247][ T5311] RBP: 00007f8aa2435024 R08: 0000000000000000 R09: 0000000000000000
[ 95.449465][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 95.453413][ T5311] R13: 00007f8aa2626038 R14: 00007f8aa2625fa0 R15: 00007fffb74c9448
[ 95.457713][ T5311]
[ 95.459656][ T5311] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 95.462897][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 95.466935][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 95.471769][ T5311] Call Trace:
[ 95.473598][ T5311]
[ 95.475375][ T5311] vpanic+0x56c/0xa60
[ 95.477687][ T5311] ? __pfx__printk+0x10/0x10
[ 95.480008][ T5311] ? __pfx_vpanic+0x10/0x10
[ 95.482055][ T5311] ? is_bpf_text_address+0x292/0x2b0
[ 95.484641][ T5311] ? is_bpf_text_address+0x26/0x2b0
[ 95.487756][ T5311] panic+0xc5/0xd0
[ 95.490635][ T5311] ? __pfx_panic+0x10/0x10
[ 95.493551][ T5311] __warn+0x315/0x4c0
[ 95.495694][ T5311] ? free_ei+0x284/0x340
[ 95.497693][ T5311] ? free_ei+0x284/0x340
[ 95.499708][ T5311] __report_bug+0x276/0x570
[ 95.501762][ T5311] ? free_ei+0x284/0x340
[ 95.503842][ T5311] ? __pfx___report_bug+0x10/0x10
[ 95.506486][ T5311] ? kasan_quarantine_put+0xbb/0x1f0
[ 95.509307][ T5311] ? free_ei+0x284/0x340
[ 95.511180][ T5311] report_bug+0x16a/0x220
[ 95.513208][ T5311] ? free_ei+0x284/0x340
[ 95.515215][ T5311] ? free_ei+0x286/0x340
[ 95.517172][ T5311] handle_bug+0x9c/0x200
[ 95.519074][ T5311] exc_invalid_op+0x1a/0x50
[ 95.521268][ T5311] asm_exc_invalid_op+0x1a/0x20
[ 95.524001][ T5311] RIP: 0010:free_ei+0x284/0x340
[ 95.526719][ T5311] Code: 48 c7 c7 c0 e3 11 8f 48 89 de 48 c7 c2 80 6d da 83 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d e9 92 ea d0 fd e8 9d a0 ec fd 90 <0f> 0b 90 e9 c7 fd ff ff e8 8f a0 ec fd 90 0f 0b 90 48 b8 00 00 00
[ 95.535073][ T5311] RSP: 0018:ffffc9000ee8fa88 EFLAGS: 00010283
[ 95.537701][ T5311] RAX: ffffffff83da7113 RBX: ffff88801fca2d10 RCX: 0000000000100000
[ 95.540728][ T5311] RDX: ffffc9000f641000 RSI: 00000000000794fc RDI: 00000000000794fd
[ 95.543772][ T5311] RBP: ffff88801fca2d00 R08: 00000000ffffffff R09: 1ffffffff20aee06
[ 95.546950][ T5311] R10: dffffc0000000000 R11: fffffbfff20aee07 R12: 0000000000000000
[ 95.550583][ T5311] R13: ffff888052728800 R14: ffff88801fca2d00 R15: 0000000000000003
[ 95.554037][ T5311] ? free_ei+0x283/0x340
[ 95.555900][ T5311] ? free_ei+0x283/0x340
[ 95.557841][ T5311] ? new_inode+0x13a/0x170
[ 95.559939][ T5311] ? tracefs_get_inode+0x11/0x80
[ 95.562509][ T5311] eventfs_create_events_dir+0x7c4/0x9f0
[ 95.565435][ T5311] create_event_toplevel_files+0x11e/0x1a0
[ 95.568367][ T5311] event_trace_add_tracer+0x8a/0x3b0
[ 95.570745][ T5311] trace_array_create_dir+0x77/0x160
[ 95.573130][ T5311] trace_array_create_systems+0xb3c/0xe60
[ 95.575343][ T5311] instance_mkdir+0xd5/0x140
[ 95.578228][ T5311] tracefs_syscall_mkdir+0x11a/0x190
[ 95.581308][ T5311] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 95.584392][ T5311] ? generic_permission+0x2bf/0x670
[ 95.586898][ T5311] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 95.589210][ T5311] vfs_mkdir+0x406/0x620
[ 95.591181][ T5311] filename_mkdirat+0x285/0x510
[ 95.593397][ T5311] ? __pfx_filename_mkdirat+0x10/0x10
[ 95.595759][ T5311] ? do_getname+0x151/0x250
[ 95.597833][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.601140][ T5311] __se_sys_mkdirat+0x35/0x150
[ 95.603648][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.606917][ T5311] do_syscall_64+0x174/0x580
[ 95.609337][ T5311] ? trace_irq_disable+0x3b/0x140
[ 95.611623][ T5311] ? clear_bhb_loop+0x70/0xc0
[ 95.613775][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.616753][ T5311] RIP: 0033:0x7f8aa239e0d9
[ 95.619084][ T5311] 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
[ 95.627894][ T5311] RSP: 002b:00007f8aa31d9fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 95.632042][ T5311] RAX: ffffffffffffffda RBX: 00007f8aa2625fa0 RCX: 00007f8aa239e0d9
[ 95.636197][ T5311] RDX: 00000000000001ff RSI: 0000200000000100 RDI: ffffffffffffff9c
[ 95.640118][ T5311] RBP: 00007f8aa2435024 R08: 0000000000000000 R09: 0000000000000000
[ 95.643665][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 95.647305][ T5311] R13: 00007f8aa2626038 R14: 00007f8aa2625fa0 R15: 00007fffb74c9448
[ 95.651307][ T5311]
[ 95.653559][ T5311] Kernel Offset: disabled
[ 95.655587][ T5311] Rebooting in 86400 seconds..