audit: type=1400 audit(1663245141.128:8): avc: denied { kernel } for pid=3805 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-next-20220915 #1 Not tainted
------------------------------------------------------
syz-executor.2/3808 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800d76b020 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ctx->lock){-...}-{2:2}:
_raw_spin_lock+0x2a/0x40
__perf_event_task_sched_out+0x53b/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
futex_wait_queue+0xf5/0x1e0
futex_wait+0x28e/0x690
do_futex+0x2ff/0x380
__x64_sys_futex+0x1c6/0x4d0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #2 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x30/0x40
raw_spin_rq_lock_nested+0x1e/0x30
task_fork_fair+0x63/0x4d0
sched_cgroup_fork+0x3d0/0x540
copy_process+0x4183/0x6e20
kernel_clone+0xe7/0x890
user_mode_thread+0xad/0xf0
rest_init+0x24/0x250
arch_call_rest_init+0xf/0x14
start_kernel+0x4c1/0x4e6
secondary_startup_64_no_verify+0xe0/0xeb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
_raw_spin_lock_irqsave+0x39/0x60
try_to_wake_up+0xab/0x1920
up+0x75/0xb0
__up_console_sem+0x6e/0x80
console_unlock+0x46a/0x590
vt_ioctl+0x2822/0x2ca0
tty_ioctl+0x7c4/0x1700
__x64_sys_ioctl+0x19a/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #0 ((console_sem).lock){-...}-{2:2}:
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
_raw_spin_lock_irqsave+0x39/0x60
down_trylock+0xe/0x70
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x16b/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
report_bug.cold+0x72/0xab
handle_bug+0x3c/0x70
exc_invalid_op+0x14/0x50
asm_exc_invalid_op+0x16/0x20
perf_group_detach+0x99e/0x12f0
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
perf_trace_init+0xc0/0x2f0
perf_tp_event_init+0xa2/0x120
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xff8/0x3bc0
__do_sys_perf_event_open+0x4c6/0x32c0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->__lock --> &ctx->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ctx->lock);
lock(&rq->__lock);
lock(&ctx->lock);
lock((console_sem).lock);
*** DEADLOCK ***
4 locks held by syz-executor.2/3808:
#0: ffffffff87064f90 (&pmus_srcu){....}-{0:0}, at: perf_event_alloc.part.0+0xdc4/0x3bc0
#1: ffffffff85460028 (event_mutex){+.+.}-{3:3}, at: perf_trace_init+0x49/0x2f0
#2: ffff88806cf3d120 (&cpuctx_lock){-...}-{2:2}, at: event_function+0x16f/0x3d0
#3: ffff88800d76b020 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
stack backtrace:
CPU: 1 PID: 3808 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220915 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
check_noncircular+0x263/0x2e0
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
_raw_spin_lock_irqsave+0x39/0x60
down_trylock+0xe/0x70
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x16b/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
report_bug.cold+0x72/0xab
handle_bug+0x3c/0x70
exc_invalid_op+0x14/0x50
asm_exc_invalid_op+0x16/0x20
RIP: 0010:perf_group_detach+0x99e/0x12f0
Code: 85 d5 f8 ff ff e8 22 57 ee ff 65 44 8b 25 96 b5 aa 7e 31 ff 44 89 e6 e8 c0 53 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 02 57 ee ff <0f> 0b e9 a9 f8 ff ff e8 f6 56 ee ff 65 8b 1d 6b b5 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010002 RBX: ffff888040498b90 RCX: 0000000000000000
RDX: ffff888018911ac0 RSI: ffffffff8157c03e RDI: 0000000000000005
RBP: ffff888040498b90 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: 0000000000000000
R13: ffff888040498c20 R14: ffff88800d76b000 R15: ffff888040498b90
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
RIP: 0010:perf_trace_init+0xc0/0x2f0
Code: 3c 20 00 0f 85 d9 01 00 00 48 8b 6d 00 48 81 fd 80 ff 45 85 0f 84 74 01 00 00 e8 fb 79 f7 ff 48 8d 7d 40 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e b4 01 00 00 48 63 5d 40 4c
RSP: 0018:ffff888040507c38 EFLAGS: 00000216
RAX: 1ffffffff0aaefac RBX: 0000000000000239 RCX: ffffc900017cf000
RDX: 0000000000040000 RSI: ffffffff814e9d45 RDI: ffffffff85577d60
RBP: ffffffff85577d20 R08: 0000000000000006 R09: 0000000000000239
R10: 00000000000000c2 R11: 0000000000000001 R12: dffffc0000000000
R13: 00000000000000c2 R14: ffff888040499158 R15: ffffffff8547c660
perf_tp_event_init+0xa2/0x120
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xff8/0x3bc0
__do_sys_perf_event_open+0x4c6/0x32c0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f004ade1b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0048357188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f004aef4f60 RCX: 00007f004ade1b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f004ae3bf6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff5c59f10f R14: 00007f0048357300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3808 at kernel/events/core.c:2047 perf_group_detach+0x99e/0x12f0
Modules linked in:
CPU: 1 PID: 3808 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220915 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:perf_group_detach+0x99e/0x12f0
Code: 85 d5 f8 ff ff e8 22 57 ee ff 65 44 8b 25 96 b5 aa 7e 31 ff 44 89 e6 e8 c0 53 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 02 57 ee ff <0f> 0b e9 a9 f8 ff ff e8 f6 56 ee ff 65 8b 1d 6b b5 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010002 RBX: ffff888040498b90 RCX: 0000000000000000
RDX: ffff888018911ac0 RSI: ffffffff8157c03e RDI: 0000000000000005
RBP: ffff888040498b90 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: 0000000000000000
R13: ffff888040498c20 R14: ffff88800d76b000 R15: ffff888040498b90
FS: 00007f0048357700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d0a724008 CR3: 000000004046c000 CR4: 0000000000350ee0
Call Trace:
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
RIP: 0010:perf_trace_init+0xc0/0x2f0
Code: 3c 20 00 0f 85 d9 01 00 00 48 8b 6d 00 48 81 fd 80 ff 45 85 0f 84 74 01 00 00 e8 fb 79 f7 ff 48 8d 7d 40 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e b4 01 00 00 48 63 5d 40 4c
RSP: 0018:ffff888040507c38 EFLAGS: 00000216
RAX: 1ffffffff0aaefac RBX: 0000000000000239 RCX: ffffc900017cf000
RDX: 0000000000040000 RSI: ffffffff814e9d45 RDI: ffffffff85577d60
RBP: ffffffff85577d20 R08: 0000000000000006 R09: 0000000000000239
R10: 00000000000000c2 R11: 0000000000000001 R12: dffffc0000000000
R13: 00000000000000c2 R14: ffff888040499158 R15: ffffffff8547c660
perf_tp_event_init+0xa2/0x120
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xff8/0x3bc0
__do_sys_perf_event_open+0x4c6/0x32c0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f004ade1b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0048357188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f004aef4f60 RCX: 00007f004ade1b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f004ae3bf6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff5c59f10f R14: 00007f0048357300 R15: 0000000000022000
irq event stamp: 1144
hardirqs last enabled at (1143): [] _raw_spin_unlock_irqrestore+0x28/0x60
hardirqs last disabled at (1144): [] sysvec_call_function_single+0xb/0xc0
softirqs last enabled at (598): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (593): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
hrtimer: interrupt took 18003 ns
audit: type=1326 audit(1663245142.726:9): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=3921 comm="syz-executor.4" exe="/syz-executor.4" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f76b0a58b19 code=0x0
audit: type=1326 audit(1663245143.562:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=3921 comm="syz-executor.4" exe="/syz-executor.4" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f76b0a58b19 code=0x0
audit: type=1326 audit(1663245144.343:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=3972 comm="syz-executor.4" exe="/syz-executor.4" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f76b0a58b19 code=0x0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
audit: type=1326 audit(1663245145.252:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=3995 comm="syz-executor.4" exe="/syz-executor.4" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f76b0a58b19 code=0x0
audit: type=1326 audit(1663245146.146:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4024 comm="syz-executor.4" exe="/syz-executor.4" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f76b0a58b19 code=0x0
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
----------------
Code disassembly (best guess):
0: 3c 20 cmp $0x20,%al
2: 00 0f add %cl,(%rdi)
4: 85 d9 test %ebx,%ecx
6: 01 00 add %eax,(%rax)
8: 00 48 8b add %cl,-0x75(%rax)
b: 6d insl (%dx),%es:(%rdi)
c: 00 48 81 add %cl,-0x7f(%rax)
f: fd std
10: 80 ff 45 cmp $0x45,%bh
13: 85 0f test %ecx,(%rdi)
15: 84 74 01 00 test %dh,0x0(%rcx,%rax,1)
19: 00 e8 add %ch,%al
1b: fb sti
1c: 79 f7 jns 0x15
1e: ff 48 8d decl -0x73(%rax)
21: 7d 40 jge 0x63
23: 48 89 f8 mov %rdi,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 74 08 je 0x3b
33: 3c 03 cmp $0x3,%al
35: 0f 8e b4 01 00 00 jle 0x1ef
3b: 48 63 5d 40 movslq 0x40(%rbp),%rbx
3f: 4c rex.WR