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', 0x186)
[ 95.112090][ T4644] Bluetooth: hci0: command tx timeout
[ 95.331701][ T5318] oom_control is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[ 95.424905][ T5318] Could not create tracefs 'show_event_triggers' entry
[ 95.451790][ T5318] Could not create tracefs 'set_event_pid' entry
[ 95.465095][ T5318] Could not create tracefs 'set_event_notrace_pid' entry
[ 95.477328][ T5318] ------------[ cut here ]------------
[ 95.479985][ T5318] !list_empty(&ei->children)
[ 95.479995][ T5318] WARNING: fs/tracefs/event_inode.c:128 at free_ei+0x284/0x340, CPU#0: syz.0.0/5318
[ 95.485973][ T5318] Modules linked in:
[ 95.488713][ T5318] CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 95.492404][ T5318] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 95.496747][ T5318] RIP: 0010:free_ei+0x284/0x340
[ 95.498999][ T5318] 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
[ 95.507082][ T5318] RSP: 0018:ffffc9000e90fa88 EFLAGS: 00010283
[ 95.509600][ T5318] RAX: ffffffff83df6b13 RBX: ffff888042bd6b90 RCX: 0000000000100000
[ 95.513285][ T5318] RDX: ffffc90020001000 RSI: 000000000007e3c3 RDI: 000000000007e3c4
[ 95.517843][ T5318] RBP: ffff888042bd6b80 R08: 00000000ffffffff R09: 1ffffffff20f1f46
[ 95.521010][ T5318] R10: dffffc0000000000 R11: fffffbfff20f1f47 R12: 0000000000000000
[ 95.524269][ T5318] R13: ffff88805262b000 R14: ffff888042bd6b80 R15: 0000000000000003
[ 95.527630][ T5318] FS: 00007fdc411fe6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
[ 95.531517][ T5318] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 95.534441][ T5318] CR2: 000055c413a3b660 CR3: 000000000bfc7000 CR4: 0000000000352ef0
[ 95.537590][ T5318] Call Trace:
[ 95.538834][ T5318]
[ 95.540042][ T5318] ? new_inode+0x13a/0x170
[ 95.541734][ T5318] ? tracefs_get_inode+0x11/0x80
[ 95.543759][ T5318] eventfs_create_events_dir+0x7c4/0x9f0
[ 95.545879][ T5318] create_event_toplevel_files+0x11e/0x1a0
[ 95.547975][ T5318] event_trace_add_tracer+0x8a/0x3b0
[ 95.549812][ T5318] trace_array_create_dir+0x77/0x160
[ 95.551729][ T5318] trace_array_create_systems+0xb3c/0xe60
[ 95.553713][ T5318] instance_mkdir+0xd5/0x140
[ 95.555461][ T5318] tracefs_syscall_mkdir+0x11a/0x190
[ 95.557503][ T5318] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 95.559637][ T5318] ? generic_permission+0x2bf/0x670
[ 95.561427][ T5318] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 95.563408][ T5318] vfs_mkdir+0x40c/0x620
[ 95.565024][ T5318] filename_mkdirat+0x285/0x510
[ 95.567028][ T5318] ? __pfx_filename_mkdirat+0x10/0x10
[ 95.569003][ T5318] ? do_getname+0x151/0x250
[ 95.571070][ T5318] __se_sys_mkdirat+0x35/0x150
[ 95.573141][ T5318] do_syscall_64+0x166/0x520
[ 95.575226][ T5318] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.577987][ T5318] ? clear_bhb_loop+0x70/0xc0
[ 95.580006][ T5318] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.582516][ T5318] RIP: 0033:0x7fdc4039e159
[ 95.584537][ T5318] 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
[ 95.592015][ T5318] RSP: 002b:00007fdc411fdfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 95.595419][ T5318] RAX: ffffffffffffffda RBX: 00007fdc40625fa0 RCX: 00007fdc4039e159
[ 95.598524][ T5318] RDX: 0000000000000186 RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 95.601490][ T5318] RBP: 00007fdc40435024 R08: 0000000000000000 R09: 0000000000000000
[ 95.604312][ T5318] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 95.607314][ T5318] R13: 00007fdc40626038 R14: 00007fdc40625fa0 R15: 00007ffe41744778
[ 95.610358][ T5318]
[ 95.611486][ T5318] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 95.614155][ T5318] CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 95.617363][ T5318] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 95.620968][ T5318] Call Trace:
[ 95.622162][ T5318]
[ 95.623316][ T5318] vpanic+0x56d/0xa60
[ 95.624860][ T5318] ? __pfx__printk+0x10/0x10
[ 95.626576][ T5318] ? __pfx_vpanic+0x10/0x10
[ 95.628292][ T5318] ? is_bpf_text_address+0x292/0x2b0
[ 95.630401][ T5318] ? is_bpf_text_address+0x26/0x2b0
[ 95.632519][ T5318] panic+0xc5/0xd0
[ 95.634129][ T5318] ? __pfx_panic+0x10/0x10
[ 95.635741][ T5318] __warn+0x315/0x4c0
[ 95.637143][ T5318] ? free_ei+0x284/0x340
[ 95.638579][ T5318] ? free_ei+0x284/0x340
[ 95.640048][ T5318] __report_bug+0x276/0x570
[ 95.641696][ T5318] ? free_ei+0x284/0x340
[ 95.643300][ T5318] ? __pfx___report_bug+0x10/0x10
[ 95.645110][ T5318] ? kasan_quarantine_put+0xbb/0x1f0
[ 95.647150][ T5318] ? free_ei+0x284/0x340
[ 95.648772][ T5318] report_bug+0x16b/0x220
[ 95.650495][ T5318] ? free_ei+0x284/0x340
[ 95.652126][ T5318] ? free_ei+0x286/0x340
[ 95.653818][ T5318] handle_bug+0x9c/0x200
[ 95.655504][ T5318] exc_invalid_op+0x1a/0x50
[ 95.657228][ T5318] asm_exc_invalid_op+0x1a/0x20
[ 95.659059][ T5318] RIP: 0010:free_ei+0x284/0x340
[ 95.661108][ T5318] 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
[ 95.668369][ T5318] RSP: 0018:ffffc9000e90fa88 EFLAGS: 00010283
[ 95.670789][ T5318] RAX: ffffffff83df6b13 RBX: ffff888042bd6b90 RCX: 0000000000100000
[ 95.674003][ T5318] RDX: ffffc90020001000 RSI: 000000000007e3c3 RDI: 000000000007e3c4
[ 95.677216][ T5318] RBP: ffff888042bd6b80 R08: 00000000ffffffff R09: 1ffffffff20f1f46
[ 95.680609][ T5318] R10: dffffc0000000000 R11: fffffbfff20f1f47 R12: 0000000000000000
[ 95.684015][ T5318] R13: ffff88805262b000 R14: ffff888042bd6b80 R15: 0000000000000003
[ 95.687574][ T5318] ? free_ei+0x283/0x340
[ 95.689631][ T5318] ? free_ei+0x283/0x340
[ 95.691751][ T5318] ? new_inode+0x13a/0x170
[ 95.693685][ T5318] ? tracefs_get_inode+0x11/0x80
[ 95.695819][ T5318] eventfs_create_events_dir+0x7c4/0x9f0
[ 95.698203][ T5318] create_event_toplevel_files+0x11e/0x1a0
[ 95.700521][ T5318] event_trace_add_tracer+0x8a/0x3b0
[ 95.702835][ T5318] trace_array_create_dir+0x77/0x160
[ 95.704915][ T5318] trace_array_create_systems+0xb3c/0xe60
[ 95.707179][ T5318] instance_mkdir+0xd5/0x140
[ 95.709254][ T5318] tracefs_syscall_mkdir+0x11a/0x190
[ 95.711669][ T5318] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 95.714169][ T5318] ? generic_permission+0x2bf/0x670
[ 95.716250][ T5318] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 95.718210][ T5318] vfs_mkdir+0x40c/0x620
[ 95.720055][ T5318] filename_mkdirat+0x285/0x510
[ 95.722280][ T5318] ? __pfx_filename_mkdirat+0x10/0x10
[ 95.724566][ T5318] ? do_getname+0x151/0x250
[ 95.726606][ T5318] __se_sys_mkdirat+0x35/0x150
[ 95.728641][ T5318] do_syscall_64+0x166/0x520
[ 95.730687][ T5318] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.733226][ T5318] ? clear_bhb_loop+0x70/0xc0
[ 95.735062][ T5318] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.737493][ T5318] RIP: 0033:0x7fdc4039e159
[ 95.739276][ T5318] 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
[ 95.745513][ T5318] RSP: 002b:00007fdc411fdfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 95.748289][ T5318] RAX: ffffffffffffffda RBX: 00007fdc40625fa0 RCX: 00007fdc4039e159
[ 95.750934][ T5318] RDX: 0000000000000186 RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 95.753882][ T5318] RBP: 00007fdc40435024 R08: 0000000000000000 R09: 0000000000000000
[ 95.757123][ T5318] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 95.760242][ T5318] R13: 00007fdc40626038 R14: 00007fdc40625fa0 R15: 00007ffe41744778
[ 95.763596][ T5318]
[ 95.765271][ T5318] Kernel Offset: disabled
[ 95.767091][ T5318] Rebooting in 86400 seconds..