------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-next-20220915 #1 Not tainted
------------------------------------------------------
syz-executor.3/3782 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff8880087c2c20 (&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
exit_to_user_mode_prepare+0x114/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
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
vprintk_emit+0x1bd/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
kauditd_hold_skb.cold+0x3f/0x4e
kauditd_send_queue+0x233/0x290
kauditd_thread+0x5da/0x9a0
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
-> #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.3/3782:
#0: ffff88806cf37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff8880087c2c20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 3782 Comm: syz-executor.3 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:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 3b b7 ef ff e8 36 b7 ef ff 65 8b 1d ab 15 ac 7e 31 ff 89 de e8 d6 b3 ef ff 85 db 0f 84 8a 00 00 00 e8 19 b7 ef ff <0f> 0b e9 a5 fe ff ff e8 0d b7 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88804115f8f8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88800d6a1ac0 RSI: ffffffff81566027 RDI: 0000000000000005
RBP: ffff888019df3408 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: ffff8880087c2c00
R13: ffff88806cf3d100 R14: ffffffff8547c7c0 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: 0033:0x7f579534fb19
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:00007f57928c5218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f5795462f68 RCX: 00007f579534fb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5795462f68
RBP: 00007f5795462f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5795462f6c
R13: 00007ffe8ce46bcf R14: 00007f57928c5300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3782 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 3782 Comm: syz-executor.3 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:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 3b b7 ef ff e8 36 b7 ef ff 65 8b 1d ab 15 ac 7e 31 ff 89 de e8 d6 b3 ef ff 85 db 0f 84 8a 00 00 00 e8 19 b7 ef ff <0f> 0b e9 a5 fe ff ff e8 0d b7 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88804115f8f8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88800d6a1ac0 RSI: ffffffff81566027 RDI: 0000000000000005
RBP: ffff888019df3408 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: ffff8880087c2c00
R13: ffff88806cf3d100 R14: ffffffff8547c7c0 R15: 0000000000000002
FS: 00007f57928c5700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2733af38e0 CR3: 0000000040e54000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
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: 0033:0x7f579534fb19
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:00007f57928c5218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f5795462f68 RCX: 00007f579534fb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5795462f68
RBP: 00007f5795462f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5795462f6c
R13: 00007ffe8ce46bcf R14: 00007f57928c5300 R15: 0000000000022000
irq event stamp: 186
hardirqs last enabled at (185): [] syscall_enter_from_user_mode+0x1d/0x50
hardirqs last disabled at (186): [] __schedule+0x1225/0x2470
softirqs last enabled at (140): [] toggle_bp_slot.constprop.0+0x26af/0x3070
softirqs last disabled at (138): [] toggle_bp_slot.constprop.0+0x13cb/0x3070
---[ end trace 0000000000000000 ]---
cgroup: Invalid name
loop2: detected capacity change from 0 to 4
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (1 blocks)
loop2: detected capacity change from 0 to 4
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (1 blocks)
loop2: detected capacity change from 0 to 4
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (1 blocks)
loop2: detected capacity change from 0 to 4
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (1 blocks)
loop2: detected capacity change from 0 to 4
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (1 blocks)
Bluetooth: MGMT ver 1.22
hrtimer: interrupt took 17142 ns
audit: type=1400 audit(1663247448.637:9): avc: denied { write } for pid=4196 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
audit: type=1400 audit(1663247448.639:10): avc: denied { setattr } for pid=4196 comm="syz-executor.2" name="oom_adj" dev="proc" ino=15098 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=file permissive=1
syz-executor.2 (4262) used greatest stack depth: 24664 bytes left
loop6: detected capacity change from 0 to 16383
loop6: detected capacity change from 0 to 16383
audit: type=1326 audit(1663247450.432:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4278 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc841328b19 code=0x0
FAT-fs (loop1): bogus number of reserved sectors
FAT-fs (loop1): Can't find a valid FAT filesystem
FAT-fs (loop1): bogus number of reserved sectors
FAT-fs (loop1): Can't find a valid FAT filesystem
netlink: 'syz-executor.5': attribute type 4 has an invalid length.
loop2: detected capacity change from 0 to 4096
EXT4-fs error (device loop2): ext4_quota_enable:6781: comm syz-executor.2: Bad quota inode # 4
EXT4-fs warning (device loop2): ext4_enable_quotas:6818: Failed to enable quota tracking (type=1, err=-116). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
loop2: detected capacity change from 0 to 4096
EXT4-fs error (device loop2): ext4_quota_enable:6781: comm syz-executor.2: Bad quota inode # 4
EXT4-fs warning (device loop2): ext4_enable_quotas:6818: Failed to enable quota tracking (type=1, err=-116). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
loop2: detected capacity change from 0 to 4096
EXT4-fs error (device loop2): ext4_quota_enable:6781: comm syz-executor.2: Bad quota inode # 4
EXT4-fs warning (device loop2): ext4_enable_quotas:6818: Failed to enable quota tracking (type=1, err=-116). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
loop2: detected capacity change from 0 to 4096
EXT4-fs error (device loop2): ext4_quota_enable:6781: comm syz-executor.2: Bad quota inode # 4
EXT4-fs warning (device loop2): ext4_enable_quotas:6818: Failed to enable quota tracking (type=1, err=-116). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
loop2: detected capacity change from 0 to 4096
EXT4-fs error (device loop2): ext4_quota_enable:6781: comm syz-executor.2: Bad quota inode # 4
EXT4-fs warning (device loop2): ext4_enable_quotas:6818: Failed to enable quota tracking (type=1, err=-116). Please run e2fsck to fix.
EXT4-fs (loop2): mount failed
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
Process accounting resumed
Process accounting resumed
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
syz-executor.6 (4573) used greatest stack depth: 24536 bytes left
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.