audit: type=1400 audit(1664971615.571:8): avc: denied { kernel } for pid=3707 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
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-next-20221005 #1 Not tainted
------------------------------------------------------
syz-executor.1/3709 is trying to acquire lock:
ffffffff853faaf8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800efb6020 (&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
regdb_fw_cb.cold+0x6c/0xa7
request_firmware_work_func+0x12e/0x240
process_one_work+0xa17/0x16a0
worker_thread+0x637/0x1260
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.1/3709:
#0: ffff88806cf37e98 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88800efb6020 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 3709 Comm: syz-executor.1 Not tainted 6.0.0-next-20221005 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 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 8b ae ef ff e8 86 ae ef ff 65 8b 1d 2b 08 ac 7e 31 ff 89 de e8 26 ab ef ff 85 db 0f 84 8a 00 00 00 e8 69 ae ef ff <0f> 0b e9 a5 fe ff ff e8 5d ae ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff888020a97c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801a268000 RSI: ffffffff81566da7 RDI: 0000000000000005
RBP: ffff88803e598000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b605b R12: ffff88800efb6000
R13: ffff88806cf3d2c0 R14: ffffffff8547d040 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: 0033:0x7ff0f45a7b19
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:00007ff0f1b1d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff0f46baf68 RCX: 00007ff0f45a7b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff0f46baf6c
RBP: 00007ff0f46baf60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007ff0f46baf6c
R13: 00007ffe9fae924f R14: 00007ff0f1b1d300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3709 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 3709 Comm: syz-executor.1 Not tainted 6.0.0-next-20221005 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 8b ae ef ff e8 86 ae ef ff 65 8b 1d 2b 08 ac 7e 31 ff 89 de e8 26 ab ef ff 85 db 0f 84 8a 00 00 00 e8 69 ae ef ff <0f> 0b e9 a5 fe ff ff e8 5d ae ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff888020a97c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801a268000 RSI: ffffffff81566da7 RDI: 0000000000000005
RBP: ffff88803e598000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b605b R12: ffff88800efb6000
R13: ffff88806cf3d2c0 R14: ffffffff8547d040 R15: 0000000000000002
FS: 00007ff0f1b1d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc4981f46f4 CR3: 000000000f092000 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: 0033:0x7ff0f45a7b19
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:00007ff0f1b1d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff0f46baf68 RCX: 00007ff0f45a7b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff0f46baf6c
RBP: 00007ff0f46baf60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007ff0f46baf6c
R13: 00007ffe9fae924f R14: 00007ff0f1b1d300 R15: 0000000000022000
irq event stamp: 638
hardirqs last enabled at (637): [] exit_to_user_mode_prepare+0x109/0x1a0
hardirqs last disabled at (638): [] __schedule+0x1225/0x2470
softirqs last enabled at (304): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (289): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
mmap: syz-executor.6 (3820) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst.
audit: type=1400 audit(1664971618.136:9): avc: denied { write } for pid=3939 comm="syz-executor.5" name="task" dev="proc" ino=14620 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1
audit: type=1400 audit(1664971618.136:10): avc: denied { add_name } for pid=3939 comm="syz-executor.5" name="3940" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1
audit: type=1400 audit(1664971618.136:11): avc: denied { create } for pid=3939 comm="syz-executor.5" name="3940" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:kernel_t:s0 tclass=file permissive=1
loop2: detected capacity change from 0 to 264192
FAT-fs (loop2): Unrecognized mount option "000000000000031203752461844674407370955161500000000000000000000004" or missing value
loop2: detected capacity change from 0 to 264192
FAT-fs (loop2): Unrecognized mount option "000000000000015127113231844674407370955161500000000000000000000004" or missing value
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
hrtimer: interrupt took 17723 ns
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
loop2: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
FAT-fs (loop2): Unrecognized mount option "000000000000043124544231844674407370955161501777777777777777777777" or missing value
loop2: detected capacity change from 0 to 264192
FAT-fs (loop2): Unrecognized mount option "000000000000055265322771844674407370955161500000000000000000000004" or missing value
loop6: detected capacity change from 0 to 264192
FAT-fs (loop6): Unrecognized mount option "000000000000041257000501844674407370955161500000000000000000000004" or missing value
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop7: detected capacity change from 0 to 264192
FAT-fs (loop7): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop2: detected capacity change from 0 to 264192
FAT-fs (loop2): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop6: detected capacity change from 0 to 264192
FAT-fs (loop6): Unrecognized mount option "000000000000015325410061844674407370955161500000000000000000000004" or missing value
loop7: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
loop6: detected capacity change from 0 to 264192
FAT-fs (loop6): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
FAT-fs (loop7): Unrecognized mount option "000000000000071034567161844674407370955161500000000000000000000004" or missing value
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
FAT-fs (loop2): Unrecognized mount option "000000000000013470636471844674407370955161500000000000000000000004" or missing value
loop0: detected capacity change from 0 to 264192
FAT-fs (loop0): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
loop7: detected capacity change from 0 to 264192
loop2: detected capacity change from 0 to 264192
FAT-fs (loop7): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
EXT4-fs (loop3): unmounting filesystem.
FAT-fs (loop2): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
loop3: detected capacity change from 0 to 1024
capability: warning: `syz-executor.4' uses 32-bit capabilities (legacy support in use)
loop1: detected capacity change from 0 to 264192
FAT-fs (loop1): Unrecognized mount option "000000000000001654371161844674407370955161500000000000000000000004" or missing value
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
loop0: detected capacity change from 0 to 264192
FAT-fs (loop0): Unrecognized mount option "000000000000026755455771844674407370955161501777777777777777777777" or missing value
EXT4-fs (loop3): unmounting filesystem.
loop3: detected capacity change from 0 to 1024
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): Unrecognized mount option "017777777777777777777771844674407370955161500000000000000000000004" or missing value
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop3): unmounting filesystem.
loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop3): unmounting filesystem.
loop0: detected capacity change from 0 to 264192
FAT-fs (loop0): Unrecognized mount option "000000000000000133135341844674407370955161500000000000000000000004" or missing value
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
audit: type=1400 audit(1664971624.804:12): avc: denied { create } for pid=4316 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:sendmail_exec_t:s0 tclass=key permissive=1
audit: type=1326 audit(1664971624.903:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4330 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f2af8a75b19 code=0x0
audit: type=1326 audit(1664971624.952:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4330 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f2af8a2872b code=0x0
audit: type=1326 audit(1664971625.088:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4339 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f2af8a75b19 code=0x0
audit: type=1326 audit(1664971625.139:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4339 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f2af8a2872b code=0x0
audit: type=1326 audit(1664971625.294:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4358 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f2af8a75b19 code=0x0
audit: type=1326 audit(1664971625.339:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4358 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f2af8a2872b code=0x0
random: crng reseeded on system resumption
Restarting kernel threads ... done.