syzbot

======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc3-syzkaller-00073-geabcdba3ad40 #0 Not tainted
------------------------------------------------------
kworker/u8:12/7146 is trying to acquire lock:
ffff888050a24610 (sb_internal#4){.+.+}-{0:0}, at: btrfs_finish_one_ordered+0x5f1/0x1f70 fs/btrfs/inode.c:3082

but task is already holding lock:
ffff888080326588 (btrfs_ordered_extent){++++}-{0:0}, at: btrfs_finish_one_ordered+0x330/0x1f70 fs/btrfs/inode.c:3047

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #11 (btrfs_ordered_extent){++++}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       btrfs_start_ordered_extent+0x2df/0x5d0 fs/btrfs/ordered-data.c:872
       btrfs_wait_ordered_range+0x14c/0x260 fs/btrfs/ordered-data.c:924
       btrfs_sync_file+0x6ed/0x11e0 fs/btrfs/file.c:1601
       generic_write_sync include/linux/fs.h:2904 [inline]
       btrfs_do_write_iter+0x5e0/0x760 fs/btrfs/file.c:1407
       aio_write+0x56d/0x7c0 fs/aio.c:1633
       io_submit_one+0x8a7/0x18a0 fs/aio.c:2052
       __do_sys_io_submit fs/aio.c:2111 [inline]
       __se_sys_io_submit+0x171/0x2e0 fs/aio.c:2081
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #10 (&ei->i_mmap_lock){++++}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
       btrfs_page_mkwrite+0x62a/0x1540 fs/btrfs/file.c:1843
       do_page_mkwrite+0x15e/0x350 mm/memory.c:3176
       do_shared_fault mm/memory.c:5398 [inline]
       do_fault mm/memory.c:5460 [inline]
       do_pte_missing mm/memory.c:3979 [inline]
       handle_pte_fault+0x10c6/0x5ed0 mm/memory.c:5801
       __handle_mm_fault mm/memory.c:5944 [inline]
       handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6112
       do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
       handle_page_fault arch/x86/mm/fault.c:1481 [inline]
       exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1539
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

-> #9 (sb_pagefaults#5){.+.+}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1725 [inline]
       sb_start_pagefault include/linux/fs.h:1890 [inline]
       btrfs_page_mkwrite+0x323/0x1540 fs/btrfs/file.c:1814
       do_page_mkwrite+0x15e/0x350 mm/memory.c:3176
       do_shared_fault mm/memory.c:5398 [inline]
       do_fault mm/memory.c:5460 [inline]
       do_pte_missing mm/memory.c:3979 [inline]
       handle_pte_fault+0x10c6/0x5ed0 mm/memory.c:5801
       __handle_mm_fault mm/memory.c:5944 [inline]
       handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6112
       do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
       handle_page_fault arch/x86/mm/fault.c:1481 [inline]
       exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1539
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

-> #8 (&mm->mmap_lock){++++}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __might_fault+0xc6/0x120 mm/memory.c:6751
       _inline_copy_from_user include/linux/uaccess.h:162 [inline]
       _copy_from_user+0x2a/0xc0 lib/usercopy.c:18
       copy_from_user include/linux/uaccess.h:212 [inline]
       __blk_trace_setup kernel/trace/blktrace.c:626 [inline]
       blk_trace_ioctl+0x1ad/0x9a0 kernel/trace/blktrace.c:740
       blkdev_ioctl+0x40c/0x6a0 block/ioctl.c:682
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:906 [inline]
       __se_sys_ioctl+0xf7/0x170 fs/ioctl.c:892
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #7 (&q->debugfs_mutex){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
       blk_mq_init_sched+0x3fa/0x830 block/blk-mq-sched.c:473
       elevator_init_mq+0x20e/0x320 block/elevator.c:610
       add_disk_fwnode+0x10d/0xf80 block/genhd.c:413
       sd_probe+0xba6/0x1100 drivers/scsi/sd.c:4024
       really_probe+0x2ba/0xad0 drivers/base/dd.c:658
       __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
       driver_probe_device+0x50/0x430 drivers/base/dd.c:830
       __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
       bus_for_each_drv+0x250/0x2e0 drivers/base/bus.c:459
       __device_attach_async_helper+0x22d/0x300 drivers/base/dd.c:987
       async_run_entry_fn+0xaa/0x420 kernel/async.c:129
       process_one_work kernel/workqueue.c:3229 [inline]
       process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
       worker_thread+0x870/0xd30 kernel/workqueue.c:3391
       kthread+0x2f2/0x390 kernel/kthread.c:389
       ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

-> #6 (&q->q_usage_counter(queue)#50){++++}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       blk_queue_enter+0xe1/0x600 block/blk-core.c:328
       blk_mq_alloc_request+0x4fa/0xaa0 block/blk-mq.c:652
       scsi_alloc_request drivers/scsi/scsi_lib.c:1222 [inline]
       scsi_execute_cmd+0x177/0x1090 drivers/scsi/scsi_lib.c:304
       read_capacity_16+0x2b4/0x1450 drivers/scsi/sd.c:2655
       sd_read_capacity drivers/scsi/sd.c:2824 [inline]
       sd_revalidate_disk+0x1013/0xbce0 drivers/scsi/sd.c:3734
       sd_probe+0x9fa/0x1100 drivers/scsi/sd.c:4010
       really_probe+0x2ba/0xad0 drivers/base/dd.c:658
       __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
       driver_probe_device+0x50/0x430 drivers/base/dd.c:830
       __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
       bus_for_each_drv+0x250/0x2e0 drivers/base/bus.c:459
       __device_attach_async_helper+0x22d/0x300 drivers/base/dd.c:987
       async_run_entry_fn+0xaa/0x420 kernel/async.c:129
       process_one_work kernel/workqueue.c:3229 [inline]
       process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
       worker_thread+0x870/0xd30 kernel/workqueue.c:3391
       kthread+0x2f2/0x390 kernel/kthread.c:389
       ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

-> #5 (&q->limits_lock){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
       queue_limits_start_update include/linux/blkdev.h:947 [inline]
       loop_reconfigure_limits+0x43f/0x900 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+0x1351/0x1f50 drivers/block/loop.c:1559
       blkdev_ioctl+0x57f/0x6a0 block/ioctl.c:693
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:906 [inline]
       __se_sys_ioctl+0xf7/0x170 fs/ioctl.c:892
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&q->q_usage_counter(io)#23){++++}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       bio_queue_enter block/blk.h:75 [inline]
       blk_mq_submit_bio+0x1536/0x2390 block/blk-mq.c:3090
       __submit_bio+0x2c6/0x560 block/blk-core.c:629
       __submit_bio_noacct_mq block/blk-core.c:710 [inline]
       submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:739
       btrfs_submit_chunk fs/btrfs/bio.c:763 [inline]
       btrfs_submit_bbio+0xf91/0x19c0 fs/btrfs/bio.c:792
       read_extent_buffer_pages+0x61f/0x7f0 fs/btrfs/extent_io.c:3558
       btrfs_read_extent_buffer+0xdb/0x730 fs/btrfs/disk-io.c:229
       read_block_for_search+0x79e/0xbb0 fs/btrfs/ctree.c:1619
       btrfs_search_slot+0x1274/0x3180 fs/btrfs/ctree.c:2240
       btrfs_init_root_free_objectid+0x148/0x330 fs/btrfs/disk-io.c:4846
       btrfs_init_fs_root fs/btrfs/disk-io.c:1137 [inline]
       btrfs_get_root_ref+0x5d7/0xc30 fs/btrfs/disk-io.c:1364
       btrfs_get_fs_root fs/btrfs/disk-io.c:1416 [inline]
       open_ctree+0x2470/0x2a30 fs/btrfs/disk-io.c:3532
       btrfs_fill_super fs/btrfs/super.c:972 [inline]
       btrfs_get_tree_super fs/btrfs/super.c:1898 [inline]
       btrfs_get_tree+0x12d8/0x1a30 fs/btrfs/super.c:2093
       vfs_get_tree+0x92/0x2b0 fs/super.c:1814
       fc_mount+0x1b/0xb0 fs/namespace.c:1231
       btrfs_get_tree_subvol fs/btrfs/super.c:2051 [inline]
       btrfs_get_tree+0x6b1/0x1a30 fs/btrfs/super.c:2094
       vfs_get_tree+0x92/0x2b0 fs/super.c:1814
       do_new_mount+0x2be/0xb40 fs/namespace.c:3507
       do_mount fs/namespace.c:3847 [inline]
       __do_sys_mount fs/namespace.c:4057 [inline]
       __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (btrfs-tree-00){++++}-{4:4}:
       reacquire_held_locks+0x3eb/0x690 kernel/locking/lockdep.c:5374
       __lock_release kernel/locking/lockdep.c:5563 [inline]
       lock_release+0x396/0xa30 kernel/locking/lockdep.c:5870
       up_write+0x79/0x590 kernel/locking/rwsem.c:1629
       btrfs_tree_unlock_rw fs/btrfs/locking.h:211 [inline]
       btrfs_unlock_up_safe+0x179/0x3b0 fs/btrfs/locking.c:225
       search_leaf fs/btrfs/ctree.c:1944 [inline]
       btrfs_search_slot+0x2767/0x3180 fs/btrfs/ctree.c:2192
       btrfs_insert_empty_items+0x9c/0x1a0 fs/btrfs/ctree.c:4354
       btrfs_insert_empty_item fs/btrfs/ctree.h:688 [inline]
       btrfs_insert_orphan_item+0x1f1/0x320 fs/btrfs/orphan.c:23
       btrfs_orphan_add+0x6d/0x1a0 fs/btrfs/inode.c:3456
       btrfs_unlink+0x267/0x350 fs/btrfs/inode.c:4304
       vfs_unlink+0x367/0x650 fs/namei.c:4523
       do_unlinkat+0x4ae/0x830 fs/namei.c:4587
       __do_sys_unlink fs/namei.c:4635 [inline]
       __se_sys_unlink fs/namei.c:4633 [inline]
       __x64_sys_unlink+0x47/0x50 fs/namei.c:4633
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (btrfs_trans_num_extwriters){++++}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       join_transaction+0x19c/0xda0 fs/btrfs/transaction.c:313
       start_transaction+0xaf8/0x1670 fs/btrfs/transaction.c:697
       btrfs_dirty_inode+0xa5/0x1a0 fs/btrfs/inode.c:6055
       inode_update_time fs/inode.c:2124 [inline]
       touch_atime+0x27f/0x690 fs/inode.c:2197
       file_accessed include/linux/fs.h:2539 [inline]
       filemap_read+0xd5c/0xf50 mm/filemap.c:2714
       __kernel_read+0x515/0x9d0 fs/read_write.c:523
       integrity_kernel_read+0xb0/0x100 security/integrity/iint.c:28
       ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
       ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
       ima_calc_file_hash+0xae6/0x1b30 security/integrity/ima/ima_crypto.c:568
       ima_collect_measurement+0x520/0xb10 security/integrity/ima/ima_api.c:293
       process_measurement+0x1351/0x1fb0 security/integrity/ima/ima_main.c:372
       ima_file_check+0xd9/0x120 security/integrity/ima/ima_main.c:572
       security_file_post_open+0xb9/0x280 security/security.c:3121
       do_open fs/namei.c:3830 [inline]
       path_openat+0x2ccd/0x3590 fs/namei.c:3987
       do_filp_open+0x27f/0x4e0 fs/namei.c:4014
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1402
       do_sys_open fs/open.c:1417 [inline]
       __do_sys_openat fs/open.c:1433 [inline]
       __se_sys_openat fs/open.c:1428 [inline]
       __x64_sys_openat+0x247/0x2a0 fs/open.c:1428
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (btrfs_trans_num_writers){++++}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       join_transaction+0x17b/0xda0 fs/btrfs/transaction.c:312
       start_transaction+0xaf8/0x1670 fs/btrfs/transaction.c:697
       btrfs_dirty_inode+0xa5/0x1a0 fs/btrfs/inode.c:6055
       inode_update_time fs/inode.c:2124 [inline]
       touch_atime+0x27f/0x690 fs/inode.c:2197
       file_accessed include/linux/fs.h:2539 [inline]
       filemap_read+0xd5c/0xf50 mm/filemap.c:2714
       __kernel_read+0x515/0x9d0 fs/read_write.c:523
       integrity_kernel_read+0xb0/0x100 security/integrity/iint.c:28
       ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
       ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
       ima_calc_file_hash+0xae6/0x1b30 security/integrity/ima/ima_crypto.c:568
       ima_collect_measurement+0x520/0xb10 security/integrity/ima/ima_api.c:293
       process_measurement+0x1351/0x1fb0 security/integrity/ima/ima_main.c:372
       ima_file_check+0xd9/0x120 security/integrity/ima/ima_main.c:572
       security_file_post_open+0xb9/0x280 security/security.c:3121
       do_open fs/namei.c:3830 [inline]
       path_openat+0x2ccd/0x3590 fs/namei.c:3987
       do_filp_open+0x27f/0x4e0 fs/namei.c:4014
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1402
       do_sys_open fs/open.c:1417 [inline]
       __do_sys_openat fs/open.c:1433 [inline]
       __se_sys_openat fs/open.c:1428 [inline]
       __x64_sys_openat+0x247/0x2a0 fs/open.c:1428
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (sb_internal#4){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3161 [inline]
       check_prevs_add kernel/locking/lockdep.c:3280 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
       __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1725 [inline]
       sb_start_intwrite include/linux/fs.h:1908 [inline]
       start_transaction+0x8fd/0x1670 fs/btrfs/transaction.c:691
       btrfs_finish_one_ordered+0x5f1/0x1f70 fs/btrfs/inode.c:3082
       btrfs_work_helper+0x392/0xc40 fs/btrfs/async-thread.c:314
       process_one_work kernel/workqueue.c:3229 [inline]
       process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
       worker_thread+0x870/0xd30 kernel/workqueue.c:3391
       kthread+0x2f2/0x390 kernel/kthread.c:389
       ret_from_fork+0x4d/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:
  sb_internal#4 --> &ei->i_mmap_lock --> btrfs_ordered_extent

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(btrfs_ordered_extent);
                               lock(&ei->i_mmap_lock);
                               lock(btrfs_ordered_extent);
  rlock(sb_internal#4);

 *** DEADLOCK ***

3 locks held by kworker/u8:12/7146:
 #0: ffff88805b400148 ((wq_completion)btrfs-endio-write){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88805b400148 ((wq_completion)btrfs-endio-write){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
 #1: ffffc9000422fd00 ((work_completion)(&work->normal_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000422fd00 ((work_completion)(&work->normal_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
 #2: ffff888080326588 (btrfs_ordered_extent){++++}-{0:0}, at: btrfs_finish_one_ordered+0x330/0x1f70 fs/btrfs/inode.c:3047

stack backtrace:
CPU: 0 UID: 0 PID: 7146 Comm: kworker/u8:12 Not tainted 6.13.0-rc3-syzkaller-00073-geabcdba3ad40 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: btrfs-endio-write btrfs_work_helper
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
 check_noncircular+0x36a/0x4a0 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+0x18ef/0x5920 kernel/locking/lockdep.c:3904
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 __sb_start_write include/linux/fs.h:1725 [inline]
 sb_start_intwrite include/linux/fs.h:1908 [inline]
 start_transaction+0x8fd/0x1670 fs/btrfs/transaction.c:691
 btrfs_finish_one_ordered+0x5f1/0x1f70 fs/btrfs/inode.c:3082
 btrfs_work_helper+0x392/0xc40 fs/btrfs/async-thread.c:314
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>