audit: type=1400 audit(1664330310.401:8): avc: denied { kernel } for pid=4071 comm="syz-executor.6" 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-rc7-next-20220927 #1 Not tainted
------------------------------------------------------
syz-executor.6/4074 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88801de0dc20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
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+0x4c6/0x4eb
secondary_startup_64_no_verify+0xe0/0xeb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
_raw_spin_lock_irqsave+0x39/0x60
try_to_wake_up+0xab/0x1930
up+0x75/0xb0
__up_console_sem+0x6e/0x80
console_unlock+0x46a/0x590
release_tty+0xcd/0x890
tty_release_struct+0xb4/0xe0
tty_release+0xbb2/0xe40
__fput+0x263/0xa40
task_work_run+0x170/0x280
exit_to_user_mode_prepare+0x199/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
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
group_sched_out.part.0+0x2c7/0x460
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
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 ***
2 locks held by syz-executor.6/4074:
#0: ffff88806cf37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88801de0dc20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 4074 Comm: syz-executor.6 Not tainted 6.0.0-rc7-next-20220927 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
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:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 ab a9 ef ff e8 a6 a9 ef ff 65 8b 1d 1b 0f ac 7e 31 ff 89 de e8 46 a6 ef ff 85 db 0f 84 8a 00 00 00 e8 89 a9 ef ff <0f> 0b e9 a5 fe ff ff e8 7d a9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88803f56f8f8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803f560000 RSI: ffffffff815666b7 RDI: 0000000000000005
RBP: ffff88803f5c8000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: ffff88801de0dc00
R13: ffff88806cf3d140 R14: ffffffff8547cf80 R15: 0000000000000002
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
RIP: 0033:0x7f407e91eb19
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:00007f407be94218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f407ea31f68 RCX: 00007f407e91eb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f407ea31f68
RBP: 00007f407ea31f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f407ea31f6c
R13: 00007ffea5b8dcbf R14: 00007f407be94300 R15: 0000000000022000
</TASK>
WARNING: CPU: 1 PID: 4074 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 4074 Comm: syz-executor.6 Not tainted 6.0.0-rc7-next-20220927 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 ab a9 ef ff e8 a6 a9 ef ff 65 8b 1d 1b 0f ac 7e 31 ff 89 de e8 46 a6 ef ff 85 db 0f 84 8a 00 00 00 e8 89 a9 ef ff <0f> 0b e9 a5 fe ff ff e8 7d a9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88803f56f8f8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803f560000 RSI: ffffffff815666b7 RDI: 0000000000000005
RBP: ffff88803f5c8000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: ffff88801de0dc00
R13: ffff88806cf3d140 R14: ffffffff8547cf80 R15: 0000000000000002
FS: 00007f407be94700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3e8ad806f4 CR3: 0000000009894000 CR4: 0000000000350ee0
Call Trace:
<TASK>
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
RIP: 0033:0x7f407e91eb19
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:00007f407be94218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f407ea31f68 RCX: 00007f407e91eb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f407ea31f68
RBP: 00007f407ea31f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f407ea31f6c
R13: 00007ffea5b8dcbf R14: 00007f407be94300 R15: 0000000000022000
</TASK>
irq event stamp: 2574
hardirqs last enabled at (2573): [<ffffffff842505ed>] syscall_enter_from_user_mode+0x1d/0x50
hardirqs last disabled at (2574): [<ffffffff842598f5>] __schedule+0x1225/0x2470
softirqs last enabled at (2328): [<ffffffff8116fa0b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (2209): [<ffffffff8116fa0b>] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
loop2: detected capacity change from 0 to 5168
hrtimer: interrupt took 19717 ns
random: crng reseeded on system resumption
Restarting kernel threads ... done.
loop2: detected capacity change from 0 to 5168
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ...
loop2: detected capacity change from 0 to 5168
done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ...
loop2: detected capacity change from 0 to 5168
done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
SELinux: Context system_u:object_r:hald_mac_exec_t:s0 is not valid (left unmapped).
audit: type=1400 audit(1664330312.292:9): avc: denied { associate } for pid=4186 comm="syz-executor.5" name="autofs" dev="devtmpfs" ino=93 scontext=system_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=filesystem permissive=1 srawcon="system_u:object_r:hald_mac_exec_t:s0"
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
Restarting kernel threads ... done.
random: crng reseeded on system resumption
syz-executor.2 (4389) used greatest stack depth: 24664 bytes left
loop6: detected capacity change from 0 to 640
EXT4-fs (loop6): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir386100820/syzkaller.Kcu3mt/27/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop6): unmounting filesystem.
loop6: detected capacity change from 0 to 640
EXT4-fs (loop6): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir386100820/syzkaller.Kcu3mt/28/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop6): unmounting filesystem.
9pnet: Could not find request transport: rdma
loop6: detected capacity change from 0 to 640
EXT4-fs (loop6): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir386100820/syzkaller.Kcu3mt/29/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop6): unmounting filesystem.
9pnet: Could not find request transport: rdma
9pnet: Could not find request transport: rdma
loop6: detected capacity change from 0 to 640
EXT4-fs (loop6): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir386100820/syzkaller.Kcu3mt/30/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop6): unmounting filesystem.
9pnet: Could not find request transport: rdma
9pnet: Could not find request transport: rdma
9pnet: Could not find request transport: rdma
loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs (loop3): unmounting filesystem.
9pnet: Could not find request transport: rdma
loop6: detected capacity change from 0 to 128
loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs (loop3): unmounting filesystem.
loop3: detected capacity change from 0 to 1024
loop6: detected capacity change from 0 to 128
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs (loop3): unmounting filesystem.
loop6: detected capacity change from 0 to 128
loop3: detected capacity change from 0 to 1024
Bluetooth: hci1: HCI_REQ-0x0401
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
loop6: detected capacity change from 0 to 128
Bluetooth: hci1: HCI_REQ-0x0401
EXT4-fs (loop3): unmounting filesystem.
loop0: detected capacity change from 0 to 264192
Bluetooth: hci1: HCI_REQ-0x0401
Bluetooth: hci1: HCI_REQ-0x0401
loop0: detected capacity change from 0 to 264192
Bluetooth: hci1: HCI_REQ-0x0401
loop0: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 264192
loop0: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 264192
loop6: detected capacity change from 0 to 264192
loop1: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop1: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 264192
loop6: detected capacity change from 0 to 264192
loop1: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
loop6: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 1
FAT-fs (loop3): invalid media value (0x8b)
FAT-fs (loop3): Can't find a valid FAT filesystem
loop4: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 1
FAT-fs (loop3): invalid media value (0x8b)
FAT-fs (loop3): Can't find a valid FAT filesystem
loop3: detected capacity change from 0 to 1
FAT-fs (loop3): invalid media value (0x8b)
FAT-fs (loop3): Can't find a valid FAT filesystem
loop1: detected capacity change from 0 to 1024
loop3: detected capacity change from 0 to 1
FAT-fs (loop3): invalid media value (0x8b)
FAT-fs (loop3): Can't find a valid FAT filesystem
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop1): unmounting filesystem.
loop3: detected capacity change from 0 to 1
FAT-fs (loop3): invalid media value (0x8b)
FAT-fs (loop3): Can't find a valid FAT filesystem
loop1: detected capacity change from 0 to 1024
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop1): unmounting filesystem.
loop1: detected capacity change from 0 to 1024
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop1): unmounting filesystem.
loop1: detected capacity change from 0 to 1024
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop1): unmounting filesystem.
Bluetooth: hci1: command 0x0401 tx timeout
loop1: detected capacity change from 0 to 512
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir926065276/syzkaller.BxjHwn/55/file0 supports timestamps until 2038 (0x7fffffff)