======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc7-syzkaller-00149-g9bffa1ad25b8 #0 Not tainted
------------------------------------------------------
kworker/3:4/6088 is trying to acquire lock:
ffff888023e13b90 (&q->q_usage_counter(queue)#51){++++}-{0:0}, at: blk_mq_alloc_request+0x59b/0x950 block/blk-mq.c:652
but task is already holding lock:
ffff888023e141a8 (&q->limits_lock){+.+.}-{4:4}, at: queue_limits_start_update include/linux/blkdev.h:947 [inline]
ffff888023e141a8 (&q->limits_lock){+.+.}-{4:4}, at: sd_revalidate_disk.isra.0+0x52c/0xa8d0 drivers/scsi/sd.c:3727
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #5 (&q->limits_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735
queue_limits_start_update include/linux/blkdev.h:947 [inline]
loop_reconfigure_limits+0x407/0x8c0 drivers/block/loop.c:998
loop_set_block_size drivers/block/loop.c:1473 [inline]
lo_simple_ioctl drivers/block/loop.c:1496 [inline]
lo_ioctl+0x8f4/0x18a0 drivers/block/loop.c:1559
lo_compat_ioctl+0xb9/0x170 drivers/block/loop.c:1692
compat_blkdev_ioctl+0x2f7/0x750 block/ioctl.c:749
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #4 (&q->q_usage_counter(io)#23){++++}-{0:0}:
bio_queue_enter block/blk.h:75 [inline]
blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3090
__submit_bio+0x384/0x540 block/blk-core.c:629
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739
submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868
mpage_bio_submit_read fs/mpage.c:75 [inline]
mpage_readahead+0x41d/0x590 fs/mpage.c:377
read_pages+0x1a8/0xdc0 mm/readahead.c:160
page_cache_ra_unbounded+0x3dc/0x750 mm/readahead.c:295
do_page_cache_ra mm/readahead.c:325 [inline]
force_page_cache_ra+0x24b/0x340 mm/readahead.c:354
page_cache_sync_ra+0x110/0x9c0 mm/readahead.c:566
page_cache_sync_readahead include/linux/pagemap.h:1397 [inline]
filemap_get_pages+0xd7b/0x1be0 mm/filemap.c:2537
filemap_read+0x3ca/0xd70 mm/filemap.c:2637
blkdev_read_iter+0x187/0x480 block/fops.c:770
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x87f/0xbe0 fs/read_write.c:565
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #3 (mapping.invalidate_lock#2){++++}-{4:4}:
down_read+0x9a/0x330 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:873 [inline]
page_cache_ra_unbounded+0x173/0x750 mm/readahead.c:226
do_page_cache_ra mm/readahead.c:325 [inline]
page_cache_ra_order+0x8f2/0xc80 mm/readahead.c:524
do_sync_mmap_readahead mm/filemap.c:3194 [inline]
filemap_fault+0x14a5/0x2820 mm/filemap.c:3335
__do_fault+0x10a/0x490 mm/memory.c:4907
do_read_fault mm/memory.c:5322 [inline]
do_fault mm/memory.c:5456 [inline]
do_pte_missing+0xebd/0x3e00 mm/memory.c:3979
handle_pte_fault mm/memory.c:5801 [inline]
__handle_mm_fault+0x103c/0x2a40 mm/memory.c:5944
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112
faultin_page mm/gup.c:1196 [inline]
__get_user_pages+0x8d9/0x3b50 mm/gup.c:1494
__get_user_pages_locked mm/gup.c:1760 [inline]
get_user_pages_unlocked+0x1c2/0x780 mm/gup.c:2737
hva_to_pfn_slow virt/kvm/kvm_main.c:2820 [inline]
hva_to_pfn+0x8be/0xc20 virt/kvm/kvm_main.c:2916
kvm_follow_pfn virt/kvm/kvm_main.c:2963 [inline]
kvm_follow_pfn+0x29f/0x3f0 virt/kvm/kvm_main.c:2947
__kvm_faultin_pfn+0x11c/0x1a0 virt/kvm/kvm_main.c:2984
__kvm_mmu_faultin_pfn arch/x86/kvm/mmu/mmu.c:4342 [inline]
kvm_mmu_faultin_pfn+0x469/0x1f30 arch/x86/kvm/mmu/mmu.c:4462
kvm_tdp_mmu_page_fault arch/x86/kvm/mmu/mmu.c:4630 [inline]
kvm_tdp_page_fault+0x182/0x3d0 arch/x86/kvm/mmu/mmu.c:4666
kvm_mmu_do_page_fault+0x58d/0x690 arch/x86/kvm/mmu/mmu_internal.h:325
kvm_mmu_page_fault+0x20f/0x1bb0 arch/x86/kvm/mmu/mmu.c:6078
handle_ept_violation+0x25a/0x640 arch/x86/kvm/vmx/vmx.c:5832
__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6620 [inline]
vmx_handle_exit+0x733/0x1f70 arch/x86/kvm/vmx/vmx.c:6637
vcpu_enter_guest arch/x86/kvm/x86.c:11081 [inline]
vcpu_run+0x2aaf/0x4c00 arch/x86/kvm/x86.c:11242
kvm_arch_vcpu_ioctl_run+0x44a/0x1740 arch/x86/kvm/x86.c:11560
kvm_vcpu_ioctl+0x6ce/0x1520 virt/kvm/kvm_main.c:4340
kvm_vcpu_compat_ioctl+0x210/0x3f0 virt/kvm/kvm_main.c:4555
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #2 (&mm->mmap_lock){++++}-{4:4}:
__might_fault mm/memory.c:6751 [inline]
__might_fault+0x11b/0x190 mm/memory.c:6744
_inline_copy_from_user include/linux/uaccess.h:162 [inline]
_copy_from_user+0x29/0xd0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:212 [inline]
compat_blk_trace_setup+0xc9/0x200 kernel/trace/blktrace.c:664
blk_trace_ioctl+0x24a/0x290 kernel/trace/blktrace.c:745
compat_blkdev_ioctl+0x13c/0x750 block/ioctl.c:742
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #1 (&q->debugfs_mutex){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735
blk_mq_init_sched+0x42b/0x640 block/blk-mq-sched.c:473
elevator_init_mq+0x2cd/0x420 block/elevator.c:610
add_disk_fwnode+0x113/0x1300 block/genhd.c:413
sd_probe+0xa66/0xfa0 drivers/scsi/sd.c:4024
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:658
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:800
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:958
bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:459
__device_attach_async_helper+0x1d3/0x290 drivers/base/dd.c:987
async_run_entry_fn+0x9c/0x530 kernel/async.c:129
process_one_work+0x958/0x1b30 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (&q->q_usage_counter(queue)#51){++++}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
blk_queue_enter+0x50f/0x640 block/blk-core.c:328
blk_mq_alloc_request+0x59b/0x950 block/blk-mq.c:652
scsi_alloc_request drivers/scsi/scsi_lib.c:1225 [inline]
scsi_execute_cmd+0x20a/0xf30 drivers/scsi/scsi_lib.c:307
read_capacity_16+0x21a/0xe20 drivers/scsi/sd.c:2655
sd_read_capacity drivers/scsi/sd.c:2824 [inline]
sd_revalidate_disk.isra.0+0x1a06/0xa8d0 drivers/scsi/sd.c:3734
scsi_rescan_device+0x243/0x340 drivers/scsi/scsi_scan.c:1715
ata_scsi_dev_rescan+0x1cb/0x470 drivers/ata/libata-scsi.c:4902
process_one_work+0x958/0x1b30 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
other info that might help us debug this:
Chain exists of:
&q->q_usage_counter(queue)#51 --> &q->q_usage_counter(io)#23 --> &q->limits_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->limits_lock);
lock(&q->q_usage_counter(io)#23);
lock(&q->limits_lock);
rlock(&q->q_usage_counter(queue)#51);
*** DEADLOCK ***
5 locks held by kworker/3:4/6088:
#0: ffff88801ac88948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3211
#1: ffffc90003f0fd80 ((work_completion)(&(&ap->scsi_rescan_task)->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3212
#2: ffff888024ce4358 (&ap->scsi_scan_mutex){+.+.}-{4:4}, at: ata_scsi_dev_rescan+0x3e/0x470 drivers/ata/libata-scsi.c:4874
#3: ffff88802152a378 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff88802152a378 (&dev->mutex){....}-{4:4}, at: scsi_rescan_device+0x27/0x340 drivers/scsi/scsi_scan.c:1691
#4: ffff888023e141a8 (&q->limits_lock){+.+.}-{4:4}, at: queue_limits_start_update include/linux/blkdev.h:947 [inline]
#4: ffff888023e141a8 (&q->limits_lock){+.+.}-{4:4}, at: sd_revalidate_disk.isra.0+0x52c/0xa8d0 drivers/scsi/sd.c:3727
stack backtrace:
CPU: 3 UID: 0 PID: 6088 Comm: kworker/3:4 Not tainted 6.13.0-rc7-syzkaller-00149-g9bffa1ad25b8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events ata_scsi_dev_rescan
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x41c/0x610 kernel/locking/lockdep.c:2074
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
blk_queue_enter+0x50f/0x640 block/blk-core.c:328
blk_mq_alloc_request+0x59b/0x950 block/blk-mq.c:652
scsi_alloc_request drivers/scsi/scsi_lib.c:1225 [inline]
scsi_execute_cmd+0x20a/0xf30 drivers/scsi/scsi_lib.c:307
read_capacity_16+0x21a/0xe20 drivers/scsi/sd.c:2655
sd_read_capacity drivers/scsi/sd.c:2824 [inline]
sd_revalidate_disk.isra.0+0x1a06/0xa8d0 drivers/scsi/sd.c:3734
scsi_rescan_device+0x243/0x340 drivers/scsi/scsi_scan.c:1715
ata_scsi_dev_rescan+0x1cb/0x470 drivers/ata/libata-scsi.c:4902
process_one_work+0x958/0x1b30 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>