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)
[ 94.745254][ T4634] Bluetooth: hci0: command tx timeout
[ 94.940909][ T5302] oom_control is deprecated and will be removed. Please report your usecase to linux-mm-@kvack.org if you depend on this functionality.
[ 95.073581][ T5302] Could not create tracefs 'show_event_triggers' entry
[ 95.116183][ T5302] Could not create tracefs 'set_event_pid' entry
[ 95.148404][ T5302] Could not create tracefs 'set_event_notrace_pid' entry
[ 95.176343][ T5302] ------------[ cut here ]------------
[ 95.180152][ T5302] !list_empty(&ei->children)
[ 95.180168][ T5302] WARNING: fs/tracefs/event_inode.c:128 at free_ei+0x284/0x340, CPU#0: syz.0.0/5302
[ 95.186324][ T5302] Modules linked in:
[ 95.188215][ T5302] CPU: 0 UID: 0 PID: 5302 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 95.192441][ T5302] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 95.197140][ T5302] RIP: 0010:free_ei+0x284/0x340
[ 95.199341][ T5302] Code: 48 c7 c7 00 5d 12 8f 48 89 de 48 c7 c2 a0 c8 dc 83 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d e9 72 6a ce fd e8 5d 43 ea fd 90 <0f> 0b 90 e9 c7 fd ff ff e8 4f 43 ea fd 90 0f 0b 90 48 b8 00 00 00
[ 95.207215][ T5302] RSP: 0018:ffffc9000df57a88 EFLAGS: 00010287
[ 95.209658][ T5302] RAX: ffffffff83dccc33 RBX: ffff888043e93610 RCX: 0000000000100000
[ 95.212981][ T5302] RDX: ffffc9000ed6a000 RSI: 000000000007e446 RDI: 000000000007e447
[ 95.216339][ T5302] RBP: ffff888043e93600 R08: 00000000ffffffff R09: 1ffffffff20b16e6
[ 95.219699][ T5302] R10: dffffc0000000000 R11: fffffbfff20b16e7 R12: 0000000000000000
[ 95.223166][ T5302] R13: ffff88805251c800 R14: ffff888043e93600 R15: 0000000000000003
[ 95.226573][ T5302] FS: 00007fb95ffac6c0(0000) GS:ffff88808c519000(0000) knlGS:0000000000000000
[ 95.230598][ T5302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 95.233847][ T5302] CR2: 000055e2c03111c0 CR3: 000000001272b000 CR4: 0000000000352ef0
[ 95.237256][ T5302] Call Trace:
[ 95.238746][ T5302]
[ 95.240025][ T5302] ? new_inode+0x13a/0x170
[ 95.242091][ T5302] ? tracefs_get_inode+0x11/0x80
[ 95.244331][ T5302] eventfs_create_events_dir+0x7c4/0x9f0
[ 95.246933][ T5302] create_event_toplevel_files+0x11e/0x1a0
[ 95.249387][ T5302] event_trace_add_tracer+0x8a/0x3b0
[ 95.251644][ T5302] trace_array_create_dir+0x77/0x160
[ 95.254160][ T5302] trace_array_create_systems+0xb3c/0xe60
[ 95.256713][ T5302] instance_mkdir+0xd5/0x140
[ 95.258691][ T5302] tracefs_syscall_mkdir+0x11a/0x190
[ 95.260990][ T5302] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 95.263507][ T5302] ? generic_permission+0x2bf/0x670
[ 95.265746][ T5302] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 95.267884][ T5302] vfs_mkdir+0x40c/0x620
[ 95.269655][ T5302] filename_mkdirat+0x285/0x510
[ 95.271721][ T5302] ? __pfx_filename_mkdirat+0x10/0x10
[ 95.274094][ T5302] ? do_getname+0x151/0x250
[ 95.276060][ T5302] __se_sys_mkdirat+0x35/0x150
[ 95.278096][ T5302] do_syscall_64+0x166/0x520
[ 95.280195][ T5302] ? trace_irq_disable+0x3b/0x140
[ 95.282514][ T5302] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.285289][ T5302] ? clear_bhb_loop+0x70/0xc0
[ 95.287450][ T5302] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.289897][ T5302] RIP: 0033:0x7fb95f19e0d9
[ 95.291745][ T5302] 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
[ 95.300064][ T5302] RSP: 002b:00007fb95ffabfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 95.303705][ T5302] RAX: ffffffffffffffda RBX: 00007fb95f425fa0 RCX: 00007fb95f19e0d9
[ 95.307020][ T5302] RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 95.310479][ T5302] RBP: 00007fb95f235024 R08: 0000000000000000 R09: 0000000000000000
[ 95.314146][ T5302] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 95.317561][ T5302] R13: 00007fb95f426038 R14: 00007fb95f425fa0 R15: 00007fff8802de08
[ 95.321048][ T5302]
[ 95.322426][ T5302] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 95.325705][ T5302] CPU: 0 UID: 0 PID: 5302 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 95.329511][ T5302] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 95.333835][ T5302] Call Trace:
[ 95.335259][ T5302]
[ 95.336558][ T5302] vpanic+0x56d/0xa60
[ 95.338350][ T5302] ? __pfx__printk+0x10/0x10
[ 95.340424][ T5302] ? __pfx_vpanic+0x10/0x10
[ 95.342433][ T5302] ? is_bpf_text_address+0x292/0x2b0
[ 95.344553][ T5302] ? is_bpf_text_address+0x26/0x2b0
[ 95.346684][ T5302] panic+0xc5/0xd0
[ 95.348263][ T5302] ? __pfx_panic+0x10/0x10
[ 95.350141][ T5302] __warn+0x315/0x4c0
[ 95.351877][ T5302] ? free_ei+0x284/0x340
[ 95.353735][ T5302] ? free_ei+0x284/0x340
[ 95.355550][ T5302] __report_bug+0x276/0x570
[ 95.357555][ T5302] ? free_ei+0x284/0x340
[ 95.359391][ T5302] ? __pfx___report_bug+0x10/0x10
[ 95.361562][ T5302] ? kasan_quarantine_put+0xbb/0x1f0
[ 95.363853][ T5302] ? free_ei+0x284/0x340
[ 95.365654][ T5302] report_bug+0x16b/0x220
[ 95.367494][ T5302] ? free_ei+0x284/0x340
[ 95.369298][ T5302] ? free_ei+0x286/0x340
[ 95.371126][ T5302] handle_bug+0x9c/0x200
[ 95.372883][ T5302] exc_invalid_op+0x1a/0x50
[ 95.374849][ T5302] asm_exc_invalid_op+0x1a/0x20
[ 95.376906][ T5302] RIP: 0010:free_ei+0x284/0x340
[ 95.379002][ T5302] Code: 48 c7 c7 00 5d 12 8f 48 89 de 48 c7 c2 a0 c8 dc 83 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d e9 72 6a ce fd e8 5d 43 ea fd 90 <0f> 0b 90 e9 c7 fd ff ff e8 4f 43 ea fd 90 0f 0b 90 48 b8 00 00 00
[ 95.387002][ T5302] RSP: 0018:ffffc9000df57a88 EFLAGS: 00010287
[ 95.389591][ T5302] RAX: ffffffff83dccc33 RBX: ffff888043e93610 RCX: 0000000000100000
[ 95.393081][ T5302] RDX: ffffc9000ed6a000 RSI: 000000000007e446 RDI: 000000000007e447
[ 95.396604][ T5302] RBP: ffff888043e93600 R08: 00000000ffffffff R09: 1ffffffff20b16e6
[ 95.399938][ T5302] R10: dffffc0000000000 R11: fffffbfff20b16e7 R12: 0000000000000000
[ 95.403453][ T5302] R13: ffff88805251c800 R14: ffff888043e93600 R15: 0000000000000003
[ 95.407477][ T5302] ? free_ei+0x283/0x340
[ 95.409447][ T5302] ? free_ei+0x283/0x340
[ 95.411295][ T5302] ? new_inode+0x13a/0x170
[ 95.413256][ T5302] ? tracefs_get_inode+0x11/0x80
[ 95.415414][ T5302] eventfs_create_events_dir+0x7c4/0x9f0
[ 95.417724][ T5302] create_event_toplevel_files+0x11e/0x1a0
[ 95.420198][ T5302] event_trace_add_tracer+0x8a/0x3b0
[ 95.422468][ T5302] trace_array_create_dir+0x77/0x160
[ 95.424717][ T5302] trace_array_create_systems+0xb3c/0xe60
[ 95.427177][ T5302] instance_mkdir+0xd5/0x140
[ 95.429100][ T5302] tracefs_syscall_mkdir+0x11a/0x190
[ 95.431366][ T5302] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 95.433833][ T5302] ? generic_permission+0x2bf/0x670
[ 95.436058][ T5302] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 95.438074][ T5302] vfs_mkdir+0x40c/0x620
[ 95.439744][ T5302] filename_mkdirat+0x285/0x510
[ 95.441727][ T5302] ? __pfx_filename_mkdirat+0x10/0x10
[ 95.443802][ T5302] ? do_getname+0x151/0x250
[ 95.445688][ T5302] __se_sys_mkdirat+0x35/0x150
[ 95.447755][ T5302] do_syscall_64+0x166/0x520
[ 95.449706][ T5302] ? trace_irq_disable+0x3b/0x140
[ 95.451793][ T5302] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.454358][ T5302] ? clear_bhb_loop+0x70/0xc0
[ 95.456315][ T5302] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 95.458855][ T5302] RIP: 0033:0x7fb95f19e0d9
[ 95.460705][ T5302] 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
[ 95.468672][ T5302] RSP: 002b:00007fb95ffabfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 95.472300][ T5302] RAX: ffffffffffffffda RBX: 00007fb95f425fa0 RCX: 00007fb95f19e0d9
[ 95.475598][ T5302] RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 95.478886][ T5302] RBP: 00007fb95f235024 R08: 0000000000000000 R09: 0000000000000000
[ 95.482345][ T5302] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 95.485679][ T5302] R13: 00007fb95f426038 R14: 00007fb95f425fa0 R15: 00007fff8802de08
[ 95.489021][ T5302]
[ 95.490826][ T5302] Kernel Offset: disabled
[ 95.492670][ T5302] Rebooting in 86400 seconds..