XFS (loop1): Unmounting Filesystem c496e05e-540d-4c72-b591-04d79d8b4eeb
======================================================
WARNING: possible circular locking dependency detected
6.9.0-rc6-syzkaller-00113-g49a73b1652c5 #0 Not tainted
------------------------------------------------------
syz-executor.1/18641 is trying to acquire lock:
ffffffff8d937100 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:312 [inline]
ffffffff8d937100 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:3746 [inline]
ffffffff8d937100 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3827 [inline]
ffffffff8d937100 (fs_reclaim){+.+.}-{0:0}, at: kmalloc_trace+0x51/0x330 mm/slub.c:3992
but task is already holding lock:
ffff88805bc46f68 (&xfs_dquot_project_class){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:125 [inline]
ffff88805bc46f68 (&xfs_dquot_project_class){+.+.}-{3:3}, at: xfs_qm_dqpurge+0xc5/0x630 fs/xfs/xfs_qm.c:129
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&xfs_dquot_project_class){+.+.}-{3:3}:
__lock_release kernel/locking/lockdep.c:5468 [inline]
lock_release+0x33e/0x6c0 kernel/locking/lockdep.c:5774
__mutex_unlock_slowpath+0xa3/0x650 kernel/locking/mutex.c:912
xfs_qm_dqget_cache_lookup+0x428/0x880 fs/xfs/xfs_dquot.c:802
xfs_qm_dqget_inode+0x1e7/0x6d0 fs/xfs/xfs_dquot.c:994
xfs_qm_dqattach_one+0x26f/0x590 fs/xfs/xfs_qm.c:278
xfs_qm_dqattach_locked+0x1a8/0x2d0 fs/xfs/xfs_qm.c:345
xfs_qm_vop_dqalloc+0x344/0xe40 fs/xfs/xfs_qm.c:1710
xfs_create+0x422/0x1170 fs/xfs/xfs_inode.c:1041
xfs_generic_create+0x631/0x7c0 fs/xfs/xfs_iops.c:199
lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3497
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x92f/0x2990 fs/namei.c:3796
do_filp_open+0x1dc/0x430 fs/namei.c:3826
do_sys_openat2+0x17a/0x1e0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_compat_sys_openat fs/open.c:1481 [inline]
__se_compat_sys_openat fs/open.c:1479 [inline]
__ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1479
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 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 (&xfs_dir_ilock_class){++++}-{3:3}:
down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1695
xfs_ilock+0x2ef/0x420 fs/xfs/xfs_inode.c:206
xfs_reclaim_inode fs/xfs/xfs_icache.c:945 [inline]
xfs_icwalk_process_inode fs/xfs/xfs_icache.c:1631 [inline]
xfs_icwalk_ag+0xca6/0x1780 fs/xfs/xfs_icache.c:1713
xfs_icwalk+0x57/0x100 fs/xfs/xfs_icache.c:1762
xfs_reclaim_inodes_nr+0x182/0x250 fs/xfs/xfs_icache.c:1011
super_cache_scan+0x409/0x550 fs/super.c:227
do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
shrink_slab+0x18a/0x1310 mm/shrinker.c:662
shrink_one+0x493/0x7c0 mm/vmscan.c:4774
shrink_many mm/vmscan.c:4835 [inline]
lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935
shrink_node mm/vmscan.c:5894 [inline]
kswapd_shrink_node mm/vmscan.c:6704 [inline]
balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895
kswapd+0x5ea/0xbf0 mm/vmscan.c:7164
kthread+0x2c1/0x3a0 kernel/kthread.c:388
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 (fs_reclaim){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__fs_reclaim_acquire mm/page_alloc.c:3698 [inline]
fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712
might_alloc include/linux/sched/mm.h:312 [inline]
slab_pre_alloc_hook mm/slub.c:3746 [inline]
slab_alloc_node mm/slub.c:3827 [inline]
kmalloc_trace+0x51/0x330 mm/slub.c:3992
kmalloc include/linux/slab.h:628 [inline]
add_stack_record_to_list mm/page_owner.c:177 [inline]
inc_stack_record_count mm/page_owner.c:219 [inline]
__set_page_owner+0x517/0x7a0 mm/page_owner.c:334
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
__alloc_pages_bulk+0x742/0x14f0 mm/page_alloc.c:4523
alloc_pages_bulk_array include/linux/gfp.h:202 [inline]
xfs_buf_alloc_pages+0x20f/0x9d0 fs/xfs/xfs_buf.c:398
xfs_buf_find_insert fs/xfs/xfs_buf.c:650 [inline]
xfs_buf_get_map+0x1e69/0x30d0 fs/xfs/xfs_buf.c:755
xfs_buf_read_map+0xd2/0xb40 fs/xfs/xfs_buf.c:860
xfs_trans_read_buf_map+0x352/0x990 fs/xfs/xfs_trans_buf.c:289
xfs_trans_read_buf fs/xfs/xfs_trans.h:210 [inline]
xfs_qm_dqflush+0x224/0x1470 fs/xfs/xfs_dquot.c:1271
xfs_qm_dqpurge+0x1d3/0x630 fs/xfs/xfs_qm.c:149
xfs_qm_dquot_walk.isra.0+0x217/0x3d0 fs/xfs/xfs_qm.c:88
xfs_qm_dqpurge_all fs/xfs/xfs_qm.c:195 [inline]
xfs_qm_unmount+0xc7/0x1c0 fs/xfs/xfs_qm.c:206
xfs_unmountfs+0x76/0x240 fs/xfs/xfs_mount.c:1076
xfs_fs_put_super+0x61/0x160 fs/xfs/xfs_super.c:1134
generic_shutdown_super+0x159/0x3d0 fs/super.c:641
kill_block_super+0x3b/0x90 fs/super.c:1675
xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2026
deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
deactivate_super+0xde/0x100 fs/super.c:505
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2c10 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 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
other info that might help us debug this:
Chain exists of:
fs_reclaim --> &xfs_dir_ilock_class --> &xfs_dquot_project_class
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&xfs_dquot_project_class);
lock(&xfs_dir_ilock_class);
lock(&xfs_dquot_project_class);
lock(fs_reclaim);
*** DEADLOCK ***
3 locks held by syz-executor.1/18641:
#0: ffff88801ceac0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88801ceac0e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88801ceac0e0 (&type->s_umount_key#73){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:504
#1: ffff8880127fe158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk.isra.0+0x111/0x3d0 fs/xfs/xfs_qm.c:75
#2: ffff88805bc46f68 (&xfs_dquot_project_class){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:125 [inline]
#2: ffff88805bc46f68 (&xfs_dquot_project_class){+.+.}-{3:3}, at: xfs_qm_dqpurge+0xc5/0x630 fs/xfs/xfs_qm.c:129
stack backtrace:
CPU: 0 PID: 18641 Comm: syz-executor.1 Not tainted 6.9.0-rc6-syzkaller-00113-g49a73b1652c5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__fs_reclaim_acquire mm/page_alloc.c:3698 [inline]
fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712
might_alloc include/linux/sched/mm.h:312 [inline]
slab_pre_alloc_hook mm/slub.c:3746 [inline]
slab_alloc_node mm/slub.c:3827 [inline]
kmalloc_trace+0x51/0x330 mm/slub.c:3992
kmalloc include/linux/slab.h:628 [inline]
add_stack_record_to_list mm/page_owner.c:177 [inline]
inc_stack_record_count mm/page_owner.c:219 [inline]
__set_page_owner+0x517/0x7a0 mm/page_owner.c:334
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
__alloc_pages_bulk+0x742/0x14f0 mm/page_alloc.c:4523
alloc_pages_bulk_array include/linux/gfp.h:202 [inline]
xfs_buf_alloc_pages+0x20f/0x9d0 fs/xfs/xfs_buf.c:398
xfs_buf_find_insert fs/xfs/xfs_buf.c:650 [inline]
xfs_buf_get_map+0x1e69/0x30d0 fs/xfs/xfs_buf.c:755
xfs_buf_read_map+0xd2/0xb40 fs/xfs/xfs_buf.c:860
xfs_trans_read_buf_map+0x352/0x990 fs/xfs/xfs_trans_buf.c:289
xfs_trans_read_buf fs/xfs/xfs_trans.h:210 [inline]
xfs_qm_dqflush+0x224/0x1470 fs/xfs/xfs_dquot.c:1271
xfs_qm_dqpurge+0x1d3/0x630 fs/xfs/xfs_qm.c:149
xfs_qm_dquot_walk.isra.0+0x217/0x3d0 fs/xfs/xfs_qm.c:88
xfs_qm_dqpurge_all fs/xfs/xfs_qm.c:195 [inline]
xfs_qm_unmount+0xc7/0x1c0 fs/xfs/xfs_qm.c:206
xfs_unmountfs+0x76/0x240 fs/xfs/xfs_mount.c:1076
xfs_fs_put_super+0x61/0x160 fs/xfs/xfs_super.c:1134
generic_shutdown_super+0x159/0x3d0 fs/super.c:641
kill_block_super+0x3b/0x90 fs/super.c:1675
xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2026
deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
deactivate_super+0xde/0x100 fs/super.c:505
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2c10 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 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
RIP: 0023:0xf734b579
Code: Unable to access opcode bytes at 0xf734b54f.
RSP: 002b:00000000ff94901c EFLAGS: 00000286 ORIG_RAX: 00000000000000fc
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000ff949120
RDX: 00000000f7377097 RSI: 0000000000000000 RDI: 00000000f73f21b5
RBP: 00000000ff949078 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>