audit: type=1400 audit(1664825739.494:8): avc: denied { kernel } for pid=3691 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
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc7-next-20220930 #1 Not tainted
------------------------------------------------------
syz-executor.7/3692 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88801db3f420 (&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+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+0x5f9/0x9c0
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
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
mempool_alloc+0x1cb/0x370
bio_alloc_bioset+0x39a/0x780
ext4_bio_write_page+0xa28/0x1870
mpage_submit_page+0x127/0x220
ext4_writepages+0x2085/0x3690
do_writepages+0x1b0/0x6a0
filemap_fdatawrite_wbc+0x147/0x1b0
__filemap_fdatawrite_range+0xb6/0x100
file_write_and_wait_range+0xb6/0x130
ext4_sync_file+0x21d/0xfa0
vfs_fsync_range+0x13d/0x230
ext4_buffered_write_iter+0x37d/0x460
ext4_file_write_iter+0x3fb/0x1900
do_iter_readv_writev+0x211/0x3c0
do_iter_write+0x18b/0x700
vfs_writev+0x1ae/0x630
__x64_sys_pwritev+0x22f/0x310
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.7/3692:
#0: ffff888010022438 (sb_writers#3){.+.+}-{0:0}, at: __x64_sys_pwritev+0x22f/0x310
#1: ffff888010024b90 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b0/0x6a0
#2: ffff888010026990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfc8/0x14c0
#3: ffff88806ce3d2e0 (&cpuctx_lock){....}-{2:2}, at: __perf_event_task_sched_in+0x28f/0x6e0
#4: ffff88801db3f420 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0
stack backtrace:
CPU: 0 PID: 3692 Comm: syz-executor.7 Not tainted 6.0.0-rc7-next-20220930 #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 7b 33 f1 ff 65 8b 2d 00 9d ad 7e 31 ff 89 ee e8 1b 30 f1 ff 85 ed 0f 84 ef 00 00 00 e8 5e 33 f1 ff <0f> 0b eb 9f e8 d5 a1 23 00 e9 17 fc ff ff e8 4b 33 f1 ff 48 8d 7b
RSP: 0018:ffff88801dbfebc0 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff88801a298000 RCX: 0000000000000000
RDX: ffff88800ff38000 RSI: ffffffff8154d8d2 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b401b R12: ffff88801a298220
R13: 0000000000000000 R14: ffff88801a2980a8 R15: ffff88801a298220
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
mempool_alloc+0x1cb/0x370
bio_alloc_bioset+0x39a/0x780
ext4_bio_write_page+0xa28/0x1870
mpage_submit_page+0x127/0x220
ext4_writepages+0x2085/0x3690
do_writepages+0x1b0/0x6a0
filemap_fdatawrite_wbc+0x147/0x1b0
__filemap_fdatawrite_range+0xb6/0x100
file_write_and_wait_range+0xb6/0x130
ext4_sync_file+0x21d/0xfa0
vfs_fsync_range+0x13d/0x230
ext4_buffered_write_iter+0x37d/0x460
ext4_file_write_iter+0x3fb/0x1900
do_iter_readv_writev+0x211/0x3c0
do_iter_write+0x18b/0x700
vfs_writev+0x1ae/0x630
__x64_sys_pwritev+0x22f/0x310
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0cb13acb19
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:00007f0cae922188 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007f0cb14bff60 RCX: 00007f0cb13acb19
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f0cb1406f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000007fffffc R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd602c3c8f R14: 00007f0cae922300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3692 at kernel/events/core.c:2233 event_filter_match+0x422/0x660
Modules linked in:
CPU: 0 PID: 3692 Comm: syz-executor.7 Not tainted 6.0.0-rc7-next-20220930 #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 7b 33 f1 ff 65 8b 2d 00 9d ad 7e 31 ff 89 ee e8 1b 30 f1 ff 85 ed 0f 84 ef 00 00 00 e8 5e 33 f1 ff <0f> 0b eb 9f e8 d5 a1 23 00 e9 17 fc ff ff e8 4b 33 f1 ff 48 8d 7b
RSP: 0018:ffff88801dbfebc0 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff88801a298000 RCX: 0000000000000000
RDX: ffff88800ff38000 RSI: ffffffff8154d8d2 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b401b R12: ffff88801a298220
R13: 0000000000000000 R14: ffff88801a2980a8 R15: ffff88801a298220
FS: 00007f0cae922700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007effb1f65028 CR3: 0000000040270000 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
mempool_alloc+0x1cb/0x370
bio_alloc_bioset+0x39a/0x780
ext4_bio_write_page+0xa28/0x1870
mpage_submit_page+0x127/0x220
ext4_writepages+0x2085/0x3690
do_writepages+0x1b0/0x6a0
filemap_fdatawrite_wbc+0x147/0x1b0
__filemap_fdatawrite_range+0xb6/0x100
file_write_and_wait_range+0xb6/0x130
ext4_sync_file+0x21d/0xfa0
vfs_fsync_range+0x13d/0x230
ext4_buffered_write_iter+0x37d/0x460
ext4_file_write_iter+0x3fb/0x1900
do_iter_readv_writev+0x211/0x3c0
do_iter_write+0x18b/0x700
vfs_writev+0x1ae/0x630
__x64_sys_pwritev+0x22f/0x310
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0cb13acb19
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:00007f0cae922188 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007f0cb14bff60 RCX: 00007f0cb13acb19
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f0cb1406f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000007fffffc R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd602c3c8f R14: 00007f0cae922300 R15: 0000000000022000
irq event stamp: 3792
hardirqs last enabled at (3791): [] __folio_start_writeback+0x616/0x970
hardirqs last disabled at (3792): [] __schedule+0x1225/0x2470
softirqs last enabled at (3566): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (3273): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
syz-executor.7 (3692) used greatest stack depth: 22464 bytes left
hrtimer: interrupt took 17983 ns
audit: type=1400 audit(1664825740.446:9): avc: denied { write } for pid=3741 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
capability: warning: `syz-executor.3' uses deprecated v2 capabilities in a way that may be insecure
capability: warning: `syz-executor.3' uses 32-bit capabilities (legacy support in use)
loop7: detected capacity change from 0 to 264192
loop7: detected capacity change from 0 to 264192
audit: type=1400 audit(1664825741.796:10): avc: denied { create } for pid=3860 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1