audit: type=1400 audit(1663332173.835:8): avc: denied { kernel } for pid=3832 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.2/3834 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff888017722020 (&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
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
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
__wait_for_common+0x96/0x540
blk_execute_rq+0x33b/0x4b0
__scsi_execute+0x27c/0x640
sr_check_events+0x17e/0xa40
cdrom_check_events+0x64/0x110
sr_block_check_events+0xbf/0x100
disk_check_events+0xc7/0x420
bdev_check_media_change+0x12c/0x310
sr_block_open+0x10e/0x2b0
blkdev_get_whole+0x9b/0x2d0
blkdev_get_by_dev.part.0+0x5f0/0xb90
blkdev_get_by_dev+0x6f/0x90
blkdev_open+0x13c/0x2c0
do_dentry_open+0x6ca/0x12b0
path_openat+0x19e1/0x2800
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
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.2/3834:
#0: ffff88800976f358 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb90
#1: ffff88806ce3d120 (&cpuctx_lock){....}-{2:2}, at: __perf_event_task_sched_in+0x28f/0x6e0
#2: ffff888017722020 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0
stack backtrace:
CPU: 0 PID: 3834 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:event_filter_match+0x422/0x660
Code: 00 00 00 e9 7c fc ff ff e8 4b 15 f1 ff 65 8b 2d c0 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 05 92 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b
RSP: 0018:ffff88801410efa0 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff888041038000 RCX: 0000000000000000
RDX: ffff88801e8b8000 RSI: ffffffff81550212 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff888041038220
R13: 0000000000000000 R14: ffff8880410380a8 R15: ffff888041038220
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
__wait_for_common+0x96/0x540
blk_execute_rq+0x33b/0x4b0
__scsi_execute+0x27c/0x640
sr_check_events+0x17e/0xa40
cdrom_check_events+0x64/0x110
sr_block_check_events+0xbf/0x100
disk_check_events+0xc7/0x420
bdev_check_media_change+0x12c/0x310
sr_block_open+0x10e/0x2b0
blkdev_get_whole+0x9b/0x2d0
blkdev_get_by_dev.part.0+0x5f0/0xb90
blkdev_get_by_dev+0x6f/0x90
blkdev_open+0x13c/0x2c0
do_dentry_open+0x6ca/0x12b0
path_openat+0x19e1/0x2800
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5c0273db19
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:00007f5bffcb3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5c02850f60 RCX: 00007f5c0273db19
RDX: 0000000000105802 RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007f5c02797f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcdd6d3ccf R14: 00007f5bffcb3300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3834 at kernel/events/core.c:2233 event_filter_match+0x422/0x660
Modules linked in:
CPU: 0 PID: 3834 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:event_filter_match+0x422/0x660
Code: 00 00 00 e9 7c fc ff ff e8 4b 15 f1 ff 65 8b 2d c0 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 05 92 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b
RSP: 0018:ffff88801410efa0 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff888041038000 RCX: 0000000000000000
RDX: ffff88801e8b8000 RSI: ffffffff81550212 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff888041038220
R13: 0000000000000000 R14: ffff8880410380a8 R15: ffff888041038220
FS: 00007f5bffcb3700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd228dd8710 CR3: 0000000010138000 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
__wait_for_common+0x96/0x540
blk_execute_rq+0x33b/0x4b0
__scsi_execute+0x27c/0x640
sr_check_events+0x17e/0xa40
cdrom_check_events+0x64/0x110
sr_block_check_events+0xbf/0x100
disk_check_events+0xc7/0x420
bdev_check_media_change+0x12c/0x310
sr_block_open+0x10e/0x2b0
blkdev_get_whole+0x9b/0x2d0
blkdev_get_by_dev.part.0+0x5f0/0xb90
blkdev_get_by_dev+0x6f/0x90
blkdev_open+0x13c/0x2c0
do_dentry_open+0x6ca/0x12b0
path_openat+0x19e1/0x2800
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5c0273db19
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:00007f5bffcb3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5c02850f60 RCX: 00007f5c0273db19
RDX: 0000000000105802 RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007f5c02797f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcdd6d3ccf R14: 00007f5bffcb3300 R15: 0000000000022000
irq event stamp: 668
hardirqs last enabled at (667): [] asm_sysvec_apic_timer_interrupt+0x16/0x20
hardirqs last disabled at (668): [] __schedule+0x1225/0x2470
softirqs last enabled at (666): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (657): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
syz-executor.2 (3834) used greatest stack depth: 23456 bytes left
netlink: 72 bytes leftover after parsing attributes in process `syz-executor.2'.
loop6: detected capacity change from 0 to 40
netlink: 5280 bytes leftover after parsing attributes in process `syz-executor.0'.
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
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
loop6: detected capacity change from 0 to 40
loop3: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 136
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
netlink: 5280 bytes leftover after parsing attributes in process `syz-executor.0'.
loop7: detected capacity change from 0 to 136
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
netlink: 5280 bytes leftover after parsing attributes in process `syz-executor.0'.
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
netlink: 5280 bytes leftover after parsing attributes in process `syz-executor.0'.
audit: type=1400 audit(1663332177.664:9): avc: denied { write } for pid=4144 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
loop3: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 136
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
loop6: detected capacity change from 0 to 40
loop3: detected capacity change from 0 to 40
audit: type=1400 audit(1663332178.124:10): avc: denied { tracepoint } for pid=4162 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
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
syz-executor.3: attempt to access beyond end of device
loop3: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop3, logical block 10, lost async page write
hrtimer: interrupt took 18345 ns
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
audit: type=1400 audit(1663332178.308:11): avc: denied { block_suspend } for pid=4185 comm="syz-executor.3" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.7'.
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
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