audit: type=1400 audit(1664421352.143:8): avc: denied { kernel } for pid=3840 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
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc7-next-20220928 #1 Not tainted
------------------------------------------------------
syz-executor.5/3842 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800eef0820 (&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+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
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.5/3842:
#0: ffff88806cf37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88800eef0820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 3842 Comm: syz-executor.5 Not tainted 6.0.0-rc7-next-20220928 #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 cb a9 ef ff e8 c6 a9 ef ff 65 8b 1d db 12 ac 7e 31 ff 89 de e8 66 a6 ef ff 85 db 0f 84 8a 00 00 00 e8 a9 a9 ef ff <0f> 0b e9 a5 fe ff ff e8 9d a9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88801d3d7c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801b29b580 RSI: ffffffff815662f7 RDI: 0000000000000005
RBP: ffff88803e410000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: ffff88800eef0800
R13: ffff88806cf3d140 R14: ffffffff8547cf00 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: 0033:0x7fa77d70ab19
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:00007fa77ac80218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fa77d81df68 RCX: 00007fa77d70ab19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa77d81df6c
RBP: 00007fa77d81df60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007fa77d81df6c
R13: 00007ffd0c15d48f R14: 00007fa77ac80300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3842 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 3842 Comm: syz-executor.5 Not tainted 6.0.0-rc7-next-20220928 #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 cb a9 ef ff e8 c6 a9 ef ff 65 8b 1d db 12 ac 7e 31 ff 89 de e8 66 a6 ef ff 85 db 0f 84 8a 00 00 00 e8 a9 a9 ef ff <0f> 0b e9 a5 fe ff ff e8 9d a9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88801d3d7c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801b29b580 RSI: ffffffff815662f7 RDI: 0000000000000005
RBP: ffff88803e410000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: ffff88800eef0800
R13: ffff88806cf3d140 R14: ffffffff8547cf00 R15: 0000000000000002
FS: 00007fa77ac80700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0349d476f4 CR3: 00000000186a6000 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: 0033:0x7fa77d70ab19
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:00007fa77ac80218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fa77d81df68 RCX: 00007fa77d70ab19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa77d81df6c
RBP: 00007fa77d81df60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007fa77d81df6c
R13: 00007ffd0c15d48f R14: 00007fa77ac80300 R15: 0000000000022000
irq event stamp: 2888
hardirqs last enabled at (2887): [] exit_to_user_mode_prepare+0x109/0x1a0
hardirqs last disabled at (2888): [] __schedule+0x1225/0x2470
softirqs last enabled at (2636): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (2171): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
9pnet_virtio: no channels available for device 127.0.0.1
9pnet_virtio: no channels available for device 127.0.0.1
loop3: detected capacity change from 0 to 4
EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!
EXT4-fs (loop3): couldn't mount RDWR because of unsupported optional features (130a0000)
loop3: detected capacity change from 0 to 4
9pnet_virtio: no channels available for device 127.0.0.1
EXT4-fs (loop3): couldn't mount RDWR because of unsupported optional features (130a0000)
9pnet_virtio: no channels available for device 127.0.0.1
9pnet_virtio: no channels available for device 127.0.0.1
loop3: detected capacity change from 0 to 4
EXT4-fs (loop3): couldn't mount RDWR because of unsupported optional features (130a0000)
9pnet_virtio: no channels available for device 127.0.0.1
9pnet_virtio: no channels available for device 127.0.0.1
9pnet_virtio: no channels available for device 127.0.0.1
loop3: detected capacity change from 0 to 4
EXT4-fs (loop3): couldn't mount RDWR because of unsupported optional features (130a0000)
9pnet_virtio: no channels available for device 127.0.0.1
9pnet_virtio: no channels available for device 127.0.0.1
9pnet_virtio: no channels available for device 127.0.0.1
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
loop0: detected capacity change from 0 to 2048
ieee802154 phy0 wpan0: encryption failed: -22
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop0): unmounting filesystem.
loop0: detected capacity change from 0 to 2048
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop0): unmounting filesystem.
loop0: detected capacity change from 0 to 2048
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
SELinux: security_context_str_to_sid (user_u) failed with errno=-22
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop0): unmounting filesystem.
loop0: detected capacity change from 0 to 2048
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop0): unmounting filesystem.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1793 sclass=netlink_route_socket pid=4176 comm=syz-executor.6
hrtimer: interrupt took 27331 ns
platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
syz-executor.3 (4230) used greatest stack depth: 22808 bytes left
platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
dns_resolver: Unsupported server list version (0)
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
dns_resolver: Unsupported server list version (0)
platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
dns_resolver: Unsupported server list version (0)
platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
dns_resolver: Unsupported server list version (0)
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
loop3: detected capacity change from 0 to 144
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir243319161/syzkaller.wCtU7c/25/mnt supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop3): unmounting filesystem.
loop2: detected capacity change from 0 to 144
loop3: detected capacity change from 0 to 144
EXT4-fs (loop2): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir243319161/syzkaller.wCtU7c/26/mnt supports timestamps until 2038 (0x7fffffff)
ext4 filesystem being mounted at /syzkaller-testdir668328167/syzkaller.asMPEP/27/mnt supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop3): unmounting filesystem.
EXT4-fs (loop2): unmounting filesystem.
loop3: detected capacity change from 0 to 144
audit: type=1400 audit(1664421360.897:9): avc: denied { write } for pid=4473 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
loop2: detected capacity change from 0 to 144
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop2): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir243319161/syzkaller.wCtU7c/27/mnt supports timestamps until 2038 (0x7fffffff)
ext4 filesystem being mounted at /syzkaller-testdir668328167/syzkaller.asMPEP/28/mnt supports timestamps until 2038 (0x7fffffff)
random: crng reseeded on system resumption
Restarting kernel threads ... done.
EXT4-fs (loop2): unmounting filesystem.
EXT4-fs (loop3): unmounting filesystem.
loop2: detected capacity change from 0 to 144
loop3: detected capacity change from 0 to 144
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir243319161/syzkaller.wCtU7c/28/mnt supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop3): unmounting filesystem.
EXT4-fs (loop2): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir668328167/syzkaller.asMPEP/29/mnt supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop2): unmounting filesystem.