IPv4: Oversized IP packet from 127.0.0.1
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc6-next-20220920 #1 Not tainted
------------------------------------------------------
syz-executor.1/4171 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){..-.}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff888020155820 (&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/0x1930
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
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.1/4171:
#0: ffff88806cf37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff888020155820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 4171 Comm: syz-executor.1 Not tainted 6.0.0-rc6-next-20220920 #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 9b b9 ef ff e8 96 b9 ef ff 65 8b 1d 0b 13 ac 7e 31 ff 89 de e8 36 b6 ef ff 85 db 0f 84 8a 00 00 00 e8 79 b9 ef ff <0f> 0b e9 a5 fe ff ff e8 6d b9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff888040567c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801bc55040 RSI: ffffffff815662c7 RDI: 0000000000000005
RBP: ffff88801d6e9720 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888020155800
R13: ffff88806cf3d140 R14: ffffffff8547d020 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: 0033:0x7f83e394ab19
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:00007f83e0ec0218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f83e3a5df68 RCX: 00007f83e394ab19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f83e3a5df6c
RBP: 00007f83e3a5df60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00007f83e3a5df6c
R13: 00007ffe295963df R14: 00007f83e0ec0300 R15: 0000000000022000
WARNING: CPU: 1 PID: 4171 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 4171 Comm: syz-executor.1 Not tainted 6.0.0-rc6-next-20220920 #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 9b b9 ef ff e8 96 b9 ef ff 65 8b 1d 0b 13 ac 7e 31 ff 89 de e8 36 b6 ef ff 85 db 0f 84 8a 00 00 00 e8 79 b9 ef ff <0f> 0b e9 a5 fe ff ff e8 6d b9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff888040567c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801bc55040 RSI: ffffffff815662c7 RDI: 0000000000000005
RBP: ffff88801d6e9720 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888020155800
R13: ffff88806cf3d140 R14: ffffffff8547d020 R15: 0000000000000002
FS: 00007f83e0ec0700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2dd21000 CR3: 000000003efea000 CR4: 0000000000350ee0
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: 0033:0x7f83e394ab19
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:00007f83e0ec0218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f83e3a5df68 RCX: 00007f83e394ab19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f83e3a5df6c
RBP: 00007f83e3a5df60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00007f83e3a5df6c
R13: 00007ffe295963df R14: 00007f83e0ec0300 R15: 0000000000022000
irq event stamp: 434
hardirqs last enabled at (433): [] exit_to_user_mode_prepare+0x109/0x1a0
hardirqs last disabled at (434): [] __schedule+0x1225/0x2470
softirqs last enabled at (216): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (211): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
IPv4: Oversized IP packet from 127.0.0.1
blktrace: Concurrent blktraces are not allowed on sg0
IPv4: Oversized IP packet from 127.0.0.1
blktrace: Concurrent blktraces are not allowed on sg0
hrtimer: interrupt took 17944 ns
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: Unexpected continuation frame (len 96)
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: Unexpected continuation frame (len 96)
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
Bluetooth: Unexpected continuation frame (len 96)
ISOFS: Unable to identify CD-ROM format.
process 'syz-executor.3' launched '/dev/fd/-1/./file0' with NULL argv: empty string added
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
Process accounting resumed
Process accounting resumed
syz-executor.6 (4530) used greatest stack depth: 24600 bytes left
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
capability: warning: `syz-executor.2' uses deprecated v2 capabilities in a way that may be insecure
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=0 sclass=netlink_audit_socket pid=4664 comm=syz-executor.3
tmpfs: Unsupported parameter 'huge'
tmpfs: Unsupported parameter 'huge'
EXT4-fs (sda): changing journal_checksum during remount not supported; ignoring
EXT4-fs (sda): re-mounted. Quota mode: none.
EXT4-fs (sda): changing journal_checksum during remount not supported; ignoring
EXT4-fs (sda): re-mounted. Quota mode: none.
EXT4-fs (sda): changing journal_checksum during remount not supported; ignoring
EXT4-fs (sda): re-mounted. Quota mode: none.
audit: type=1400 audit(1663676265.758:17): avc: denied { read } for pid=4699 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
loop4: detected capacity change from 0 to 128
EXT4-fs (sda): changing journal_checksum during remount not supported; ignoring
EXT4-fs (sda): re-mounted. Quota mode: none.
loop4: detected capacity change from 0 to 128
EXT4-fs (sda): changing journal_checksum during remount not supported; ignoring
EXT4-fs (sda): re-mounted. Quota mode: none.
loop4: detected capacity change from 0 to 128
audit: type=1400 audit(1663676265.963:18): avc: denied { write } for pid=4731 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
loop4: detected capacity change from 0 to 128
loop6: detected capacity change from 0 to 128