------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-next-20220912 #1 Not tainted
------------------------------------------------------
syz-executor.7/3738 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800ee3fc20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0
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+0x3f9e/0x6df0
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
event_filter_match+0x422/0x660
merge_sched_in+0x107/0x1110
visit_groups_merge.constprop.0.isra.0+0x4fc/0xef0
ctx_sched_in+0x2e6/0x770
perf_event_sched_in+0x58/0x80
__perf_event_task_sched_in+0x408/0x6e0
finish_task_switch.isra.0+0x46d/0x8a0
__schedule+0x89b/0x2470
preempt_schedule_common+0x45/0xc0
__cond_resched+0x17/0x30
__wait_for_common+0x96/0x540
devtmpfs_submit_req+0xa8/0x100
devtmpfs_create_node+0x175/0x220
device_add+0x19c3/0x1ec0
device_create_groups_vargs+0x207/0x280
device_create+0xdc/0x120
vc_allocate+0x5b2/0x830
con_install+0x93/0x5d0
tty_init_dev.part.0+0xa0/0x610
tty_open+0xbc0/0x1370
chrdev_open+0x268/0x6e0
do_dentry_open+0x6ca/0x12b0
path_openat+0x19e1/0x2800
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
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 ***
5 locks held by syz-executor.7/3738:
#0: ffffffff8567b6c8 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x550/0x1370
#1: ffff8880431651c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_lock+0xbd/0x120
#2: ffffffff853fa800 (console_lock){+.+.}-{0:0}, at: con_install+0x8c/0x5d0
#3: ffff88806ce3d120 (&cpuctx_lock){....}-{2:2}, at: __perf_event_task_sched_in+0x28f/0x6e0
#4: ffff88800ee3fc20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0
stack backtrace:
CPU: 0 PID: 3738 Comm: syz-executor.7 Not tainted 6.0.0-rc5-next-20220912 #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:event_filter_match+0x422/0x660
Code: 00 00 00 e9 7c fc ff ff e8 4b 15 f1 ff 65 8b 2d c0 73 ad 7e 31 ff 89 ee e8 eb 11 f1 ff 85 ed 0f 84 ef 00 00 00 e8 2e 15 f1 ff <0f> 0b eb 9f e8 15 80 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b
RSP: 0018:ffff888017e16dd8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff888020718000 RCX: 0000000000000000
RDX: ffff88801b845040 RSI: ffffffff81550212 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865aa01b R12: ffff888020718220
R13: 0000000000000000 R14: ffff8880207180a8 R15: ffff888020718220
merge_sched_in+0x107/0x1110
visit_groups_merge.constprop.0.isra.0+0x4fc/0xef0
ctx_sched_in+0x2e6/0x770
perf_event_sched_in+0x58/0x80
__perf_event_task_sched_in+0x408/0x6e0
finish_task_switch.isra.0+0x46d/0x8a0
__schedule+0x89b/0x2470
preempt_schedule_common+0x45/0xc0
__cond_resched+0x17/0x30
__wait_for_common+0x96/0x540
devtmpfs_submit_req+0xa8/0x100
devtmpfs_create_node+0x175/0x220
device_add+0x19c3/0x1ec0
device_create_groups_vargs+0x207/0x280
device_create+0xdc/0x120
vc_allocate+0x5b2/0x830
con_install+0x93/0x5d0
tty_init_dev.part.0+0xa0/0x610
tty_open+0xbc0/0x1370
chrdev_open+0x268/0x6e0
do_dentry_open+0x6ca/0x12b0
path_openat+0x19e1/0x2800
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fac7902ea04
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44
RSP: 002b:00007fac765f0cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fac7918ef60 RCX: 00007fac7902ea04
RDX: 0000000000000002 RSI: 00007fac765f0d60 RDI: 00000000ffffff9c
RBP: 00007fac765f0d60 R08: 0000000000000000 R09: 000000000000000e
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffc8beecc3f R14: 00007fac765f1300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3738 at kernel/events/core.c:2233 event_filter_match+0x422/0x660
Modules linked in:
CPU: 0 PID: 3738 Comm: syz-executor.7 Not tainted 6.0.0-rc5-next-20220912 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:event_filter_match+0x422/0x660
Code: 00 00 00 e9 7c fc ff ff e8 4b 15 f1 ff 65 8b 2d c0 73 ad 7e 31 ff 89 ee e8 eb 11 f1 ff 85 ed 0f 84 ef 00 00 00 e8 2e 15 f1 ff <0f> 0b eb 9f e8 15 80 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b
RSP: 0018:ffff888017e16dd8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff888020718000 RCX: 0000000000000000
RDX: ffff88801b845040 RSI: ffffffff81550212 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865aa01b R12: ffff888020718220
R13: 0000000000000000 R14: ffff8880207180a8 R15: ffff888020718220
FS: 00007fac765f1700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e590bc610 CR3: 0000000043ac4000 CR4: 0000000000350ef0
Call Trace:
merge_sched_in+0x107/0x1110
visit_groups_merge.constprop.0.isra.0+0x4fc/0xef0
ctx_sched_in+0x2e6/0x770
perf_event_sched_in+0x58/0x80
__perf_event_task_sched_in+0x408/0x6e0
finish_task_switch.isra.0+0x46d/0x8a0
__schedule+0x89b/0x2470
preempt_schedule_common+0x45/0xc0
__cond_resched+0x17/0x30
__wait_for_common+0x96/0x540
devtmpfs_submit_req+0xa8/0x100
devtmpfs_create_node+0x175/0x220
device_add+0x19c3/0x1ec0
device_create_groups_vargs+0x207/0x280
device_create+0xdc/0x120
vc_allocate+0x5b2/0x830
con_install+0x93/0x5d0
tty_init_dev.part.0+0xa0/0x610
tty_open+0xbc0/0x1370
chrdev_open+0x268/0x6e0
do_dentry_open+0x6ca/0x12b0
path_openat+0x19e1/0x2800
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fac7902ea04
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44
RSP: 002b:00007fac765f0cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fac7918ef60 RCX: 00007fac7902ea04
RDX: 0000000000000002 RSI: 00007fac765f0d60 RDI: 00000000ffffff9c
RBP: 00007fac765f0d60 R08: 0000000000000000 R09: 000000000000000e
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffc8beecc3f R14: 00007fac765f1300 R15: 0000000000022000
irq event stamp: 1632
hardirqs last enabled at (1631): [] _raw_spin_unlock_irqrestore+0x28/0x60
hardirqs last disabled at (1632): [] __schedule+0x1225/0x2470
softirqs last enabled at (1540): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (1463): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
hrtimer: interrupt took 24085 ns
syz-executor.1 (3801) used greatest stack depth: 24680 bytes left
syz-executor.7 (3738) used greatest stack depth: 22992 bytes left
loop3: detected capacity change from 0 to 40
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
loop3: detected capacity change from 0 to 40
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
loop3: detected capacity change from 0 to 40
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
loop3: detected capacity change from 0 to 40
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
Bluetooth: Unexpected continuation frame (len 18)
Bluetooth: Unexpected continuation frame (len 18)
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read(16) 88 d7 38 8e 5b 7e fd 6f f8 4a 11 d5
Bluetooth: Unexpected continuation frame (len 18)
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read(16) 88 d7 38 8e 5b 7e fd 6f f8 4a 11 d5
Bluetooth: Unexpected continuation frame (len 18)
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read(16) 88 d7 38 8e 5b 7e fd 6f f8 4a 11 d5
Bluetooth: Unexpected continuation frame (len 18)
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read(16) 88 d7 38 8e 5b 7e fd 6f f8 4a 11 d5
Bluetooth: Unexpected continuation frame (len 18)
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read(16) 88 d7 38 8e 5b 7e fd 6f f8 4a 11 d5
Bluetooth: Unexpected continuation frame (len 18)
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read(16) 88 d7 38 8e 5b 7e fd 6f f8 4a 11 d5