ext4 filesystem being mounted at /syzkaller-testdir862438872/syzkaller.c4akAY/4/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop1): unmounting filesystem.
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-next-20220913 #1 Not tainted
------------------------------------------------------
syz-executor.4/4055 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88803edccc20 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
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+0x3f9e/0x6df0
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
perf_group_detach+0x99e/0x12f0
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
lock_acquire+0x1db/0x530
_raw_spin_lock+0x2a/0x40
__d_instantiate+0x77/0x450
d_instantiate+0x6d/0x90
alloc_file_pseudo+0x157/0x250
sock_alloc_file+0x4f/0x1a0
__sys_socket+0x1a8/0x250
__x64_sys_socket+0x6f/0xb0
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 ***
4 locks held by syz-executor.4/4055:
#0: ffff88801e695d60 (&sb->s_type->i_lock_key#8){+.+.}-{2:2}, at: d_instantiate+0x62/0x90
#1: ffff88801e637538 (&dentry->d_lock){+.+.}-{2:2}, at: __d_instantiate+0x77/0x450
#2: ffff88806cf3d120 (&cpuctx_lock){-...}-{2:2}, at: event_function+0x16f/0x3d0
#3: ffff88803edccc20 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
stack backtrace:
CPU: 1 PID: 4055 Comm: syz-executor.4 Not tainted 6.0.0-rc5-next-20220913 #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:perf_group_detach+0x99e/0x12f0
Code: 85 d5 f8 ff ff e8 22 57 ee ff 65 44 8b 25 96 b5 aa 7e 31 ff 44 89 e6 e8 c0 53 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 02 57 ee ff <0f> 0b e9 a9 f8 ff ff e8 f6 56 ee ff 65 8b 1d 6b b5 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010004 RBX: ffff888040dda878 RCX: 0000000000000000
RDX: ffff888018a25040 RSI: ffffffff8157c03e RDI: 0000000000000005
RBP: ffff888040dda878 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865aa05b R12: 0000000000000000
R13: ffff888040dda908 R14: ffff88803edccc00 R15: ffff888040dda878
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
RIP: 0010:lock_acquire+0x1db/0x530
Code: 02 b8 ff ff ff ff 65 0f c1 05 c1 36 d8 7e 83 f8 01 0f 85 c8 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffff888040f37c38 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff110081e6f89 RCX: 00000000000054ef
RDX: 1ffff11003144b36 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff86cc97cf
R10: fffffbfff0d992f9 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801e637538 R15: 0000000000000000
_raw_spin_lock+0x2a/0x40
__d_instantiate+0x77/0x450
d_instantiate+0x6d/0x90
alloc_file_pseudo+0x157/0x250
sock_alloc_file+0x4f/0x1a0
__sys_socket+0x1a8/0x250
__x64_sys_socket+0x6f/0xb0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f08ddf11b19
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:00007f08db487188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f08de024f60 RCX: 00007f08ddf11b19
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: 00007f08ddf6bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe3fc87b2f R14: 00007f08db487300 R15: 0000000000022000
WARNING: CPU: 1 PID: 4055 at kernel/events/core.c:2047 perf_group_detach+0x99e/0x12f0
Modules linked in:
CPU: 1 PID: 4055 Comm: syz-executor.4 Not tainted 6.0.0-rc5-next-20220913 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:perf_group_detach+0x99e/0x12f0
Code: 85 d5 f8 ff ff e8 22 57 ee ff 65 44 8b 25 96 b5 aa 7e 31 ff 44 89 e6 e8 c0 53 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 02 57 ee ff <0f> 0b e9 a9 f8 ff ff e8 f6 56 ee ff 65 8b 1d 6b b5 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010004 RBX: ffff888040dda878 RCX: 0000000000000000
RDX: ffff888018a25040 RSI: ffffffff8157c03e RDI: 0000000000000005
RBP: ffff888040dda878 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865aa05b R12: 0000000000000000
R13: ffff888040dda908 R14: ffff88803edccc00 R15: ffff888040dda878
FS: 00007f08db487700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdfc99ffb8 CR3: 000000001ceb4000 CR4: 0000000000350ee0
Call Trace:
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
RIP: 0010:lock_acquire+0x1db/0x530
Code: 02 b8 ff ff ff ff 65 0f c1 05 c1 36 d8 7e 83 f8 01 0f 85 c8 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffff888040f37c38 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff110081e6f89 RCX: 00000000000054ef
RDX: 1ffff11003144b36 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff86cc97cf
R10: fffffbfff0d992f9 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801e637538 R15: 0000000000000000
_raw_spin_lock+0x2a/0x40
__d_instantiate+0x77/0x450
d_instantiate+0x6d/0x90
alloc_file_pseudo+0x157/0x250
sock_alloc_file+0x4f/0x1a0
__sys_socket+0x1a8/0x250
__x64_sys_socket+0x6f/0xb0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f08ddf11b19
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:00007f08db487188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f08de024f60 RCX: 00007f08ddf11b19
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: 00007f08ddf6bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe3fc87b2f R14: 00007f08db487300 R15: 0000000000022000
irq event stamp: 592
hardirqs last enabled at (591): [] mod_objcg_state+0x3ab/0x9e0
hardirqs last disabled at (592): [] sysvec_call_function_single+0xb/0xc0
softirqs last enabled at (374): [] sk_setsockopt+0x368/0x3650
softirqs last disabled at (372): [] release_sock+0x1b/0x1b0
---[ end trace 0000000000000000 ]---
loop1: detected capacity change from 0 to 2048
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir862438872/syzkaller.c4akAY/5/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop1): unmounting filesystem.
loop1: detected capacity change from 0 to 2048
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir862438872/syzkaller.c4akAY/6/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop1): unmounting filesystem.
loop1: detected capacity change from 0 to 2048
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir862438872/syzkaller.c4akAY/7/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop1): unmounting filesystem.
hrtimer: interrupt took 19477 ns
loop5: detected capacity change from 0 to 131076
audit: type=1400 audit(1663079598.325:9): avc: denied { write } for pid=4285 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
EXT4-fs (loop5): mounted filesystem without journal. Quota mode: none.
EXT4-fs (loop5): unmounting filesystem.
netlink: 'syz-executor.7': attribute type 1 has an invalid length.
netlink: 'syz-executor.7': attribute type 1 has an invalid length.
loop3: detected capacity change from 0 to 264192
netlink: 'syz-executor.7': attribute type 1 has an invalid length.
tmpfs: Bad value for 'mpol'
=======================================================
WARNING: The mand mount option has been deprecated and
and is ignored by this kernel. Remove the mand
option from the mount to silence this warning.
=======================================================
tmpfs: Unknown parameter 'euid>00000000000000000000'
loop3: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
loop3: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
netlink: 'syz-executor.7': attribute type 1 has an invalid length.
tmpfs: Unknown parameter 'euid>00000000000000000000'
netlink: 'syz-executor.7': attribute type 1 has an invalid length.
loop3: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
tmpfs: Unknown parameter 'euid>00000000000000000000'
loop3: detected capacity change from 0 to 264192
tmpfs: Bad value for 'mpol'
tmpfs: Unknown parameter 'euid>00000000000000000000'
----------------
Code disassembly (best guess):
0: 02 b8 ff ff ff ff add -0x1(%rax),%bh
6: 65 0f c1 05 c1 36 d8 xadd %eax,%gs:0x7ed836c1(%rip) # 0x7ed836cf
d: 7e
e: 83 f8 01 cmp $0x1,%eax
11: 0f 85 c8 02 00 00 jne 0x2df
17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp)
1d: 74 01 je 0x20
1f: fb sti
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction
2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx)
3b: 00
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 84 .byte 0x84
3f: 24 .byte 0x24