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)
openat$iommufd(0xffffffffffffff9c, &(0x7f0000000080), 0x200, 0x0)
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)
[ 94.328696][ T4638] Bluetooth: hci0: command tx timeout
[ 94.510247][ T5312] oom_control is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[ 94.573155][ T5312] Could not create tracefs 'show_event_triggers' entry
[ 94.580551][ T5312] Could not create tracefs 'set_event_pid' entry
[ 94.652089][ T5312] Could not create tracefs 'set_event_notrace_pid' entry
[ 94.682613][ T5312] ------------[ cut here ]------------
[ 94.685110][ T5312] !list_empty(&ei->children)
[ 94.685124][ T5312] WARNING: fs/tracefs/event_inode.c:128 at free_ei+0x284/0x340, CPU#0: syz.0.0/5312
[ 94.691563][ T5312] Modules linked in:
[ 94.693225][ T5312] CPU: 0 UID: 0 PID: 5312 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 94.696939][ T5312] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 94.701156][ T5312] RIP: 0010:free_ei+0x284/0x340
[ 94.703304][ T5312] 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
[ 94.711708][ T5312] RSP: 0018:ffffc9000dbb7a88 EFLAGS: 00010283
[ 94.714530][ T5312] RAX: ffffffff83df6b13 RBX: ffff888042dd8110 RCX: 0000000000100000
[ 94.717878][ T5312] RDX: ffffc9000e78a000 RSI: 0000000000074c01 RDI: 0000000000074c02
[ 94.721447][ T5312] RBP: ffff888042dd8100 R08: 00000000ffffffff R09: 1ffffffff20f1f46
[ 94.724969][ T5312] R10: dffffc0000000000 R11: fffffbfff20f1f47 R12: 0000000000000000
[ 94.728515][ T5312] R13: ffff8880523c7000 R14: ffff888042dd8100 R15: 0000000000000003
[ 94.731862][ T5312] FS: 00007fb67588b6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
[ 94.735906][ T5312] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 94.738801][ T5312] CR2: 000055c6138d6ea0 CR3: 0000000012c03000 CR4: 0000000000352ef0
[ 94.742350][ T5312] Call Trace:
[ 94.743840][ T5312]
[ 94.745213][ T5312] ? new_inode+0x13a/0x170
[ 94.746986][ T5312] ? tracefs_get_inode+0x11/0x80
[ 94.748895][ T5312] eventfs_create_events_dir+0x7c4/0x9f0
[ 94.751140][ T5312] create_event_toplevel_files+0x11e/0x1a0
[ 94.753514][ T5312] event_trace_add_tracer+0x8a/0x3b0
[ 94.755761][ T5312] trace_array_create_dir+0x77/0x160
[ 94.757662][ T5312] trace_array_create_systems+0xb3c/0xe60
[ 94.759781][ T5312] instance_mkdir+0xd5/0x140
[ 94.761558][ T5312] tracefs_syscall_mkdir+0x11a/0x190
[ 94.763598][ T5312] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 94.766082][ T5312] ? generic_permission+0x2bf/0x670
[ 94.768383][ T5312] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 94.770602][ T5312] vfs_mkdir+0x40c/0x620
[ 94.772564][ T5312] filename_mkdirat+0x285/0x510
[ 94.774838][ T5312] ? __pfx_filename_mkdirat+0x10/0x10
[ 94.777216][ T5312] ? do_getname+0x151/0x250
[ 94.779100][ T5312] __se_sys_mkdirat+0x35/0x150
[ 94.781113][ T5312] do_syscall_64+0x166/0x520
[ 94.783493][ T5312] ? trace_irq_disable+0x3b/0x140
[ 94.786094][ T5312] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 94.788717][ T5312] ? clear_bhb_loop+0x70/0xc0
[ 94.790836][ T5312] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 94.793425][ T5312] RIP: 0033:0x7fb67499e159
[ 94.795604][ T5312] 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
[ 94.803980][ T5312] RSP: 002b:00007fb67588afe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 94.807480][ T5312] RAX: ffffffffffffffda RBX: 00007fb674c25fa0 RCX: 00007fb67499e159
[ 94.810792][ T5312] RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 94.814201][ T5312] RBP: 00007fb674a35024 R08: 0000000000000000 R09: 0000000000000000
[ 94.817604][ T5312] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 94.820927][ T5312] R13: 00007fb674c26038 R14: 00007fb674c25fa0 R15: 00007ffe26465aa8
[ 94.823934][ T5312]
[ 94.825373][ T5312] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 94.828274][ T5312] CPU: 0 UID: 0 PID: 5312 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
[ 94.832221][ T5312] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 94.836600][ T5312] Call Trace:
[ 94.838118][ T5312]
[ 94.839419][ T5312] vpanic+0x56d/0xa60
[ 94.841194][ T5312] ? __pfx__printk+0x10/0x10
[ 94.843168][ T5312] ? __pfx_vpanic+0x10/0x10
[ 94.845178][ T5312] ? is_bpf_text_address+0x292/0x2b0
[ 94.847307][ T5312] ? is_bpf_text_address+0x26/0x2b0
[ 94.849325][ T5312] panic+0xc5/0xd0
[ 94.850904][ T5312] ? __pfx_panic+0x10/0x10
[ 94.852779][ T5312] __warn+0x315/0x4c0
[ 94.854332][ T5312] ? free_ei+0x284/0x340
[ 94.855965][ T5312] ? free_ei+0x284/0x340
[ 94.857723][ T5312] __report_bug+0x276/0x570
[ 94.859702][ T5312] ? free_ei+0x284/0x340
[ 94.861489][ T5312] ? __pfx___report_bug+0x10/0x10
[ 94.863713][ T5312] ? kasan_quarantine_put+0xbb/0x1f0
[ 94.865854][ T5312] ? free_ei+0x284/0x340
[ 94.867655][ T5312] report_bug+0x16b/0x220
[ 94.869514][ T5312] ? free_ei+0x284/0x340
[ 94.871307][ T5312] ? free_ei+0x286/0x340
[ 94.873162][ T5312] handle_bug+0x9c/0x200
[ 94.875074][ T5312] exc_invalid_op+0x1a/0x50
[ 94.876991][ T5312] asm_exc_invalid_op+0x1a/0x20
[ 94.879238][ T5312] RIP: 0010:free_ei+0x284/0x340
[ 94.881364][ T5312] 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
[ 94.889580][ T5312] RSP: 0018:ffffc9000dbb7a88 EFLAGS: 00010283
[ 94.892301][ T5312] RAX: ffffffff83df6b13 RBX: ffff888042dd8110 RCX: 0000000000100000
[ 94.895655][ T5312] RDX: ffffc9000e78a000 RSI: 0000000000074c01 RDI: 0000000000074c02
[ 94.899069][ T5312] RBP: ffff888042dd8100 R08: 00000000ffffffff R09: 1ffffffff20f1f46
[ 94.902419][ T5312] R10: dffffc0000000000 R11: fffffbfff20f1f47 R12: 0000000000000000
[ 94.905762][ T5312] R13: ffff8880523c7000 R14: ffff888042dd8100 R15: 0000000000000003
[ 94.909041][ T5312] ? free_ei+0x283/0x340
[ 94.910935][ T5312] ? free_ei+0x283/0x340
[ 94.912786][ T5312] ? new_inode+0x13a/0x170
[ 94.914523][ T5312] ? tracefs_get_inode+0x11/0x80
[ 94.916488][ T5312] eventfs_create_events_dir+0x7c4/0x9f0
[ 94.918818][ T5312] create_event_toplevel_files+0x11e/0x1a0
[ 94.921149][ T5312] event_trace_add_tracer+0x8a/0x3b0
[ 94.923318][ T5312] trace_array_create_dir+0x77/0x160
[ 94.925375][ T5312] trace_array_create_systems+0xb3c/0xe60
[ 94.927742][ T5312] instance_mkdir+0xd5/0x140
[ 94.929686][ T5312] tracefs_syscall_mkdir+0x11a/0x190
[ 94.932372][ T5312] ? __pfx_tracefs_syscall_mkdir+0x10/0x10
[ 94.934850][ T5312] ? generic_permission+0x2bf/0x670
[ 94.937212][ T5312] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 94.939291][ T5312] vfs_mkdir+0x40c/0x620
[ 94.941102][ T5312] filename_mkdirat+0x285/0x510
[ 94.943325][ T5312] ? __pfx_filename_mkdirat+0x10/0x10
[ 94.945605][ T5312] ? do_getname+0x151/0x250
[ 94.947618][ T5312] __se_sys_mkdirat+0x35/0x150
[ 94.949624][ T5312] do_syscall_64+0x166/0x520
[ 94.951832][ T5312] ? trace_irq_disable+0x3b/0x140
[ 94.954251][ T5312] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 94.956995][ T5312] ? clear_bhb_loop+0x70/0xc0
[ 94.959434][ T5312] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 94.962442][ T5312] RIP: 0033:0x7fb67499e159
[ 94.964439][ T5312] 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
[ 94.972161][ T5312] RSP: 002b:00007fb67588afe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 94.975750][ T5312] RAX: ffffffffffffffda RBX: 00007fb674c25fa0 RCX: 00007fb67499e159
[ 94.979070][ T5312] RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
[ 94.982430][ T5312] RBP: 00007fb674a35024 R08: 0000000000000000 R09: 0000000000000000
[ 94.985872][ T5312] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 94.989331][ T5312] R13: 00007fb674c26038 R14: 00007fb674c25fa0 R15: 00007ffe26465aa8
[ 94.992710][ T5312]
[ 94.994423][ T5312] Kernel Offset: disabled
[ 94.996196][ T5312] Rebooting in 86400 seconds..