audit: type=1400 audit(1664420487.016:8): avc: denied { kernel } for pid=3936 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-rc7-next-20220928 #1 Not tainted
------------------------------------------------------
syz-executor.2/3938 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88803f35e820 (&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
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
do_con_write+0xc05/0x1d50
con_write+0x21/0x40
n_tty_write+0x4d4/0xfe0
file_tty_write.constprop.0+0x455/0x8a0
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
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
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
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.2/3938:
#0: ffff88806ce37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88803f35e820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 0 PID: 3938 Comm: syz-executor.2 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:
<TASK>
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:ffff88803feb78f8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888015ec1ac0 RSI: ffffffff815662f7 RDI: 0000000000000005
RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b401b R12: ffff88803f35e800
R13: ffff88806ce3d140 R14: ffffffff8547cf00 R15: 0000000000000002
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
RIP: 0033:0x7f71be9d2b19
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:00007f71bbf48218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f71beae5f68 RCX: 00007f71be9d2b19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f71beae5f68
RBP: 00007f71beae5f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f71beae5f6c
R13: 00007ffc7d8f48ff R14: 00007f71bbf48300 R15: 0000000000022000
</TASK>
WARNING: CPU: 0 PID: 3938 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 0 PID: 3938 Comm: syz-executor.2 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:ffff88803feb78f8 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888015ec1ac0 RSI: ffffffff815662f7 RDI: 0000000000000005
RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b401b R12: ffff88803f35e800
R13: ffff88806ce3d140 R14: ffffffff8547cf00 R15: 0000000000000002
FS: 00007f71bbf48700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc0d08de2f0 CR3: 000000001b720000 CR4: 0000000000350ef0
Call Trace:
<TASK>
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__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
RIP: 0033:0x7f71be9d2b19
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:00007f71bbf48218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f71beae5f68 RCX: 00007f71be9d2b19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f71beae5f68
RBP: 00007f71beae5f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f71beae5f6c
R13: 00007ffc7d8f48ff R14: 00007f71bbf48300 R15: 0000000000022000
</TASK>
irq event stamp: 2696
hardirqs last enabled at (2695): [<ffffffff842505ed>] syscall_enter_from_user_mode+0x1d/0x50
hardirqs last disabled at (2696): [<ffffffff842598f5>] __schedule+0x1225/0x2470
softirqs last enabled at (2568): [<ffffffff8116fa0b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (2561): [<ffffffff8116fa0b>] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
loop0: detected capacity change from 0 to 264192
loop0: detected capacity change from 0 to 264192
loop0: detected capacity change from 0 to 264192
EXT4-fs warning (device sda): ext4_group_extend:1850: can't shrink FS - resize aborted
loop3: detected capacity change from 0 to 1024
EXT4-fs warning (device sda): ext4_group_extend:1850: can't shrink FS - resize aborted
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs (loop3): unmounting filesystem.
hrtimer: interrupt took 21771 ns
loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs warning (device sda): ext4_group_extend:1850: can't shrink FS - resize aborted
EXT4-fs (loop3): unmounting filesystem.
loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs warning (device sda): ext4_group_extend:1850: can't shrink FS - resize aborted
EXT4-fs (loop3): unmounting filesystem.
loop3: detected capacity change from 0 to 1024
EXT4-fs warning (device sda): ext4_group_extend:1850: can't shrink FS - resize aborted
EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
random: crng reseeded on system resumption
random: crng reseeded on system resumption
EXT4-fs (loop3): 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
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
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop0): unmounting filesystem.
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'.
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(1664420491.957:9): avc: denied { module_load } for pid=4407 comm="syz-executor.2" path=2F6D656D66643A42DB2F89036CDE62CBB534EDBE4C4BA4673F4B29A0F09B3859B55AE11253F547CCF3E902680BCA2896E143DF1CEA8543FB1013FA0316CD05202864656C6574656429 dev="hugetlbfs" ino=14918 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=system permissive=1
Invalid ELF header magic: != ELF
Invalid ELF header magic: != ELF
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
Invalid ELF header magic: != ELF
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
Invalid ELF header magic: != ELF
loop4: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop4: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
loop5: detected capacity change from 0 to 264192
process 'syz-executor.7' launched './file0' with NULL argv: empty string added
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
loop4: detected capacity change from 0 to 1348
SELinux: security_context_str_to_sid (root) failed with errno=-22
loop1: detected capacity change from 0 to 512
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop1): unmounting filesystem.
SELinux: security_context_str_to_sid (root) failed with errno=-22
SELinux: security_context_str_to_sid (root) failed with errno=-22
netlink: 'syz-executor.6': attribute type 40 has an invalid length.
netlink: 'syz-executor.6': attribute type 40 has an invalid length.