audit: type=1400 audit(1663593946.591:8): avc: denied { kernel } for pid=3919 comm="syz-executor.0" 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-rc6-next-20220919 #1 Not tainted
------------------------------------------------------
syz-executor.0/3920 is trying to acquire lock:
ffffffff853fa838 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800de5cc20 (&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
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
-> #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
do_con_write+0xc05/0x1d50
con_write+0x21/0x40
n_tty_write+0x4d4/0xfe0
file_tty_write.constprop.0+0x49c/0x8f0
vfs_write+0x9c3/0xd90
ksys_write+0x127/0x250
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
shrink_node+0x569/0x1e80
do_try_to_free_pages+0x3c2/0x1720
try_to_free_mem_cgroup_pages+0x34a/0x8c0
try_charge_memcg+0x422/0x12e0
mem_cgroup_charge_skmem+0x7c/0x1b0
sk_setsockopt+0x1b17/0x3650
__sys_setsockopt+0x25c/0x2b0
__x64_sys_setsockopt+0xba/0x160
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 ***
3 locks held by syz-executor.0/3920:
#0: ffff888018b62cb0 (sk_lock-AF_INET){+.+.}-{0:0}, at: sk_setsockopt+0x1e7/0x3650
#1: ffff88806ce3d160 (&cpuctx_lock){....}-{2:2}, at: __perf_event_task_sched_in+0x28f/0x6e0
#2: ffff88800de5cc20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0
stack backtrace:
CPU: 0 PID: 3920 Comm: syz-executor.0 Not tainted 6.0.0-rc6-next-20220919 #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 70 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 45 8d 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b
RSP: 0018:ffff88803dca72c0 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff88803dcc8000 RCX: 0000000000000000
RDX: ffff88803c575040 RSI: ffffffff81550262 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff88803dcc8220
R13: 0000000000000000 R14: ffff88803dcc80a8 R15: ffff88803dcc8220
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
shrink_node+0x569/0x1e80
do_try_to_free_pages+0x3c2/0x1720
try_to_free_mem_cgroup_pages+0x34a/0x8c0
try_charge_memcg+0x422/0x12e0
mem_cgroup_charge_skmem+0x7c/0x1b0
sk_setsockopt+0x1b17/0x3650
__sys_setsockopt+0x25c/0x2b0
__x64_sys_setsockopt+0xba/0x160
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f89fbe37b19
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:00007f89f93ad188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f89fbf4af60 RCX: 00007f89fbe37b19
RDX: 0000000000000049 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007f89fbe91f6d R08: 0000000000000010 R09: 0000000000000000
R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc7a8cc8f R14: 00007f89f93ad300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3920 at kernel/events/core.c:2233 event_filter_match+0x422/0x660
Modules linked in:
CPU: 0 PID: 3920 Comm: syz-executor.0 Not tainted 6.0.0-rc6-next-20220919 #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 70 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 45 8d 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b
RSP: 0018:ffff88803dca72c0 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff88803dcc8000 RCX: 0000000000000000
RDX: ffff88803c575040 RSI: ffffffff81550262 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff88803dcc8220
R13: 0000000000000000 R14: ffff88803dcc80a8 R15: ffff88803dcc8220
FS: 00007f89f93ad700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7903d56f4 CR3: 000000003c9f0000 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
shrink_node+0x569/0x1e80
do_try_to_free_pages+0x3c2/0x1720
try_to_free_mem_cgroup_pages+0x34a/0x8c0
try_charge_memcg+0x422/0x12e0
mem_cgroup_charge_skmem+0x7c/0x1b0
sk_setsockopt+0x1b17/0x3650
__sys_setsockopt+0x25c/0x2b0
__x64_sys_setsockopt+0xba/0x160
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f89fbe37b19
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:00007f89f93ad188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f89fbf4af60 RCX: 00007f89fbe37b19
RDX: 0000000000000049 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007f89fbe91f6d R08: 0000000000000010 R09: 0000000000000000
R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc7a8cc8f R14: 00007f89f93ad300 R15: 0000000000022000
irq event stamp: 1454
hardirqs last enabled at (1453): [] _raw_spin_unlock_irq+0x1f/0x50
hardirqs last disabled at (1454): [] __schedule+0x1225/0x2470
softirqs last enabled at (1372): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (1363): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
loop3: detected capacity change from 0 to 256
tmpfs: Bad value for 'gid'
tmpfs: Bad value for 'gid'
loop3: detected capacity change from 0 to 256
loop6: detected capacity change from 0 to 264192
syz-executor.0 (3920) used greatest stack depth: 24256 bytes left
tmpfs: Bad value for 'gid'
loop3: detected capacity change from 0 to 256
loop6: detected capacity change from 0 to 264192
hrtimer: interrupt took 19787 ns
loop2: detected capacity change from 0 to 264192
tmpfs: Bad value for 'gid'
loop3: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop7: detected capacity change from 0 to 264192
tmpfs: Bad value for 'gid'
loop4: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop7: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop6: detected capacity change from 0 to 264192
loop3: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop7: detected capacity change from 0 to 264192
sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive.
sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive.
sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive.
sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive.
sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'.
capability: warning: `syz-executor.6' uses 32-bit capabilities (legacy support in use)
tmpfs: Bad value for 'mpol'
tmpfs: Bad value for 'mpol'
tmpfs: Bad value for 'mpol'
tmpfs: Bad value for 'mpol'
tmpfs: Bad value for 'mpol'
audit: type=1400 audit(1663593955.520:9): avc: denied { watch_reads } for pid=4551 comm="syz-executor.6" path="/syzkaller-testdir526934654/syzkaller.ceAN7b/33/file0" dev="sda" ino=15997 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
loop1: detected capacity change from 0 to 40
audit: type=1400 audit(1663593956.036:10): avc: denied { write } for pid=4662 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
syz-executor.1: attempt to access beyond end of device
loop1: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop1, logical block 10, lost async page write
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
loop1: detected capacity change from 0 to 40
syz-executor.1: attempt to access beyond end of device
loop1: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop1, logical block 10, lost async page write
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
loop4: detected capacity change from 0 to 40
syz-executor.4: attempt to access beyond end of device
loop4: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop4, logical block 10, lost async page write
loop1: detected capacity change from 0 to 40
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'.
loop4: detected capacity change from 0 to 40
syz-executor.4: attempt to access beyond end of device
loop4: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop4, logical block 10, lost async page write
loop5: detected capacity change from 0 to 40
loop3: detected capacity change from 0 to 40
loop0: detected capacity change from 0 to 40