audit: type=1400 audit(1663332985.256:8): avc: denied { kernel } for pid=3907 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-20220916 #1 Not tainted
------------------------------------------------------
syz-executor.2/3908 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff888040123820 (&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
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
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
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
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.2/3908:
#0: ffff88806ce37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff888040123820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 0 PID: 3908 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220916 #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:ffff8880407bfc48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803d03b580 RSI: ffffffff81566027 RDI: 0000000000000005
RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff888040123800
R13: ffff88806ce3d100 R14: ffffffff8547c660 R15: 0000000000000002
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
RIP: 0033:0x7ff1dfa86b19
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:00007ff1dcffc218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff1dfb99f68 RCX: 00007ff1dfa86b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff1dfb99f6c
RBP: 00007ff1dfb99f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007ff1dfb99f6c
R13: 00007ffeb7cf79ff R14: 00007ff1dcffc300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3908 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 0 PID: 3908 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220916 #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:ffff8880407bfc48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803d03b580 RSI: ffffffff81566027 RDI: 0000000000000005
RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff888040123800
R13: ffff88806ce3d100 R14: ffffffff8547c660 R15: 0000000000000002
FS: 00007ff1dcffc700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f955878c300 CR3: 000000003c334000 CR4: 0000000000350ef0
Call Trace:
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
RIP: 0033:0x7ff1dfa86b19
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:00007ff1dcffc218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff1dfb99f68 RCX: 00007ff1dfa86b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff1dfb99f6c
RBP: 00007ff1dfb99f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007ff1dfb99f6c
R13: 00007ffeb7cf79ff R14: 00007ff1dcffc300 R15: 0000000000022000
irq event stamp: 652
hardirqs last enabled at (651): [] exit_to_user_mode_prepare+0x109/0x1a0
hardirqs last disabled at (652): [] __schedule+0x1225/0x2470
softirqs last enabled at (480): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (471): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
loop3: detected capacity change from 0 to 3
=======================================================
WARNING: The mand mount option has been deprecated and
and is ignored by this kernel. Remove the mand
option from the mount to silence this warning.
=======================================================
loop3: detected capacity change from 0 to 3
sit: Src spoofed 0.0.0.156/2002:0:29c:0:9cdf:3f09:: -> 172.20.20.170/5171::2200
loop0: detected capacity change from 0 to 3
sit: Src spoofed 0.0.0.156/2002:0:29c:0:9cdf:3f09:: -> 172.20.20.170/5171::2200
loop3: detected capacity change from 0 to 3
sit: Src spoofed 0.0.0.156/2002:0:29c:0:9cdf:3f09:: -> 172.20.20.170/5171::2200
loop0: detected capacity change from 0 to 3
loop3: detected capacity change from 0 to 3
loop0: detected capacity change from 0 to 3
hrtimer: interrupt took 16952 ns
loop3: detected capacity change from 0 to 3
loop6: detected capacity change from 0 to 40
syz-executor.6: attempt to access beyond end of device
loop6: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop6, logical block 10, lost async page write
syz-executor.6 (4056) used greatest stack depth: 24472 bytes left
device lo entered promiscuous mode
device lo left promiscuous mode
loop6: detected capacity change from 0 to 40
syz-executor.6: attempt to access beyond end of device
loop6: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop6, logical block 10, lost async page write
device lo entered promiscuous mode
device lo left promiscuous mode
device lo entered promiscuous mode
loop6: detected capacity change from 0 to 40
device lo left promiscuous mode
device lo entered promiscuous mode
device lo left promiscuous mode
syz-executor.6: attempt to access beyond end of device
loop6: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop6, logical block 10, lost async page write
device lo entered promiscuous mode
device lo left promiscuous mode
device lo entered promiscuous mode
device lo left promiscuous mode
loop6: detected capacity change from 0 to 40
device lo entered promiscuous mode
device lo left promiscuous mode
audit: type=1400 audit(1663332992.180:9): avc: denied { write } for pid=4370 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
perf: interrupt took too long (5491 > 5415), lowering kernel.perf_event_max_sample_rate to 36000
perf: interrupt took too long (10823 > 10760), lowering kernel.perf_event_max_sample_rate to 18000
perf: interrupt took too long (13548 > 13528), lowering kernel.perf_event_max_sample_rate to 14000
perf: interrupt took too long (16948 > 16935), lowering kernel.perf_event_max_sample_rate to 11000
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4396 comm=syz-executor.6
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4396 comm=syz-executor.6
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4435 comm=syz-executor.1
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4445 comm=syz-executor.1
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4438 comm=syz-executor.6
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4456 comm=syz-executor.1
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4458 comm=syz-executor.6
ISOFS: Unable to identify CD-ROM format.
FAT-fs (loop0): Unrecognized mount option "subj_role=/dev/full" or missing value
FAT-fs (loop0): Unrecognized mount option "subj_role=/dev/full" or missing value
ISOFS: Unable to identify CD-ROM format.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pid=4485 comm=syz-executor.6
capability: warning: `syz-executor.7' uses deprecated v2 capabilities in a way that may be insecure
FAT-fs (loop0): Unrecognized mount option "subj_role=/dev/full" or missing value
9pnet_fd: p9_fd_create_tcp (4500): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4500): problem connecting socket to 127.0.0.1
autofs4:pid:4516:validate_dev_ioctl: path string terminator missing for cmd(0xc0189376)
autofs4:pid:4516:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(1768304430.3237228), cmd(0xc0189376)
autofs4:pid:4516:validate_dev_ioctl: invalid device control module version supplied for cmd(0xc0189376)
FAT-fs (loop0): Unrecognized mount option "subj_role=/dev/full" or missing value
ISOFS: Unable to identify CD-ROM format.
9pnet_fd: p9_fd_create_tcp (4526): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4528): problem connecting socket to 127.0.0.1
FAT-fs (loop0): Unrecognized mount option "subj_role=/dev/full" or missing value
9pnet_fd: p9_fd_create_tcp (4538): problem connecting socket to 127.0.0.1
ISOFS: Unable to identify CD-ROM format.
9pnet_fd: p9_fd_create_tcp (4534): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4550): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4539): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4556): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4564): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4557): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4559): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4553): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4574): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4579): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4567): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4580): problem connecting socket to 127.0.0.1
loop7: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
tmpfs: Unknown parameter 'euid>00000000000000000000'
loop7: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
tmpfs: Unknown parameter 'euid>00000000000000000000'
9pnet_fd: p9_fd_create_tcp (4596): problem connecting socket to 127.0.0.1
loop7: detected capacity change from 0 to 264192
9pnet_fd: p9_fd_create_tcp (4585): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (4586): problem connecting socket to 127.0.0.1
tmpfs: Bad value for 'mpol'
9pnet_fd: p9_fd_create_tcp (4599): problem connecting socket to 127.0.0.1
tmpfs: Unknown parameter 'euid>00000000000000000000'
9pnet_fd: p9_fd_create_tcp (4598): problem connecting socket to 127.0.0.1
loop7: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
tmpfs: Unknown parameter 'euid>00000000000000000000'
9pnet_fd: p9_fd_create_tcp (4626): problem connecting socket to 127.0.0.1
loop7: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
tmpfs: Unknown parameter 'euid>00000000000000000000'