======================================================
WARNING: possible circular locking dependency detected
6.12.0-rc5-next-20241104 #1 Not tainted
------------------------------------------------------
syz-executor.4/38632 is trying to acquire lock:
ffff888042188b60 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0xe0/0x190
but task is already holding lock:
ffff88800edb08e8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x33/0x70
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&q->debugfs_mutex){+.+.}-{4:4}:
__mutex_lock+0x13d/0xac0
blk_mq_init_sched+0x429/0x670
elevator_init_mq+0x299/0x3d0
add_disk_fwnode+0x113/0x1310
sd_probe+0xa82/0xf20
really_probe+0x240/0x820
__driver_probe_device+0x2c4/0x380
driver_probe_device+0x4e/0x2a0
__device_attach_driver+0x1d4/0x390
bus_for_each_drv+0x14c/0x1d0
__device_attach_async_helper+0x1d1/0x260
async_run_entry_fn+0x91/0x290
process_one_work+0x8ee/0x1a00
worker_thread+0x674/0xe70
kthread+0x2c2/0x3a0
ret_from_fork+0x48/0x80
ret_from_fork_asm+0x1a/0x30
-> #2 (&q->q_usage_counter(io)){++++}-{0:0}:
blk_mq_submit_bio+0x1faa/0x26a0
__submit_bio+0x175/0x480
submit_bio_noacct_nocheck+0x641/0xcc0
submit_bio_noacct+0x3b3/0x13b0
ext4_read_bh+0x13d/0x2b0
__ext4_sb_bread_gfp.isra.0+0x119/0x1e0
ext4_update_superblocks_fn+0x64e/0xeb0
__ext4_ioctl+0x27a3/0x3b10
__x64_sys_ioctl+0x1a0/0x210
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (jbd2_handle){++++}-{0:0}:
start_this_handle+0xe5a/0x1300
jbd2__journal_start+0x393/0x6b0
__ext4_journal_start_sb+0x183/0x600
ext4_dirty_inode+0xa5/0x130
__mark_inode_dirty+0x1c1/0xd40
generic_update_time+0xcb/0xf0
touch_atime+0x4bb/0x590
ext4_file_mmap+0x1ca/0x250
__mmap_region+0xfa8/0x22b0
mmap_region+0x133/0x300
do_mmap+0xc2c/0x1000
vm_mmap_pgoff+0x1fe/0x390
ksys_mmap_pgoff+0x3d7/0x520
__x64_sys_mmap+0x127/0x190
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&mm->mmap_lock){++++}-{4:4}:
__lock_acquire+0x2930/0x4430
lock_acquire.part.0+0xeb/0x320
__might_fault+0x110/0x190
_copy_from_user+0x2b/0xd0
__blk_trace_setup+0x96/0x180
blk_trace_setup+0x47/0x70
sg_ioctl+0x69f/0x26b0
__x64_sys_ioctl+0x1a0/0x210
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&mm->mmap_lock --> &q->q_usage_counter(io) --> &q->debugfs_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->debugfs_mutex);
lock(&q->q_usage_counter(io));
lock(&q->debugfs_mutex);
rlock(&mm->mmap_lock);
*** DEADLOCK ***
1 lock held by syz-executor.4/38632:
#0: ffff88800edb08e8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x33/0x70
stack backtrace:
CPU: 0 UID: 0 PID: 38632 Comm: syz-executor.4 Not tainted 6.12.0-rc5-next-20241104 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0xca/0x120
print_circular_bug+0x53f/0x820
check_noncircular+0x2e9/0x3c0
__lock_acquire+0x2930/0x4430
lock_acquire.part.0+0xeb/0x320
__might_fault+0x110/0x190
_copy_from_user+0x2b/0xd0
__blk_trace_setup+0x96/0x180
blk_trace_setup+0x47/0x70
sg_ioctl+0x69f/0x26b0
__x64_sys_ioctl+0x1a0/0x210
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc938b7eb19
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:00007fc9360f4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc938c91f60 RCX: 00007fc938b7eb19
RDX: 0000000020000000 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 00007fc938bd8f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffa35e731f R14: 00007fc9360f4300 R15: 0000000000022000
</TASK>
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: 'syz-executor.5': attribute type 16 has an invalid length.
netlink: 'syz-executor.5': attribute type 16 has an invalid length.
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: 'syz-executor.5': attribute type 16 has an invalid length.
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: 'syz-executor.5': attribute type 16 has an invalid length.
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
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
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
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
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
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
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
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
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
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