======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.7.404/6865 is trying to acquire lock:
ffff0000fbce2378 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_calc_xattr_init+0x1c4/0xb9c fs/ocfs2/xattr.c:631
but task is already holding lock:
ffff0000e270c2c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
ffff0000e270c2c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3cd4 fs/ocfs2/suballoc.c:782
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}:
down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline]
ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline]
ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
ocfs2_evict_inode+0x1248/0x3d2c fs/ocfs2/inode.c:1219
evict+0x3c8/0x810 fs/inode.c:705
iput_final fs/inode.c:1834 [inline]
iput+0x764/0x7f4 fs/inode.c:1860
ocfs2_dentry_iput+0x1d4/0x2d4 fs/ocfs2/dcache.c:418
dentry_unlink_inode+0x348/0x438 fs/dcache.c:403
__dentry_kill+0x320/0x598 fs/dcache.c:611
dentry_kill+0xc8/0x248 fs/dcache.c:-1
dput+0x238/0x454 fs/dcache.c:918
ovl_check_rename_whiteout fs/overlayfs/super.c:1325 [inline]
ovl_make_workdir fs/overlayfs/super.c:1424 [inline]
ovl_get_workdir+0x858/0x1068 fs/overlayfs/super.c:1539
ovl_fill_super+0x139c/0x2294 fs/overlayfs/super.c:2095
mount_nodev+0x68/0x104 fs/super.c:1489
ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186
legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
vfs_get_tree+0x90/0x274 fs/super.c:1573
do_new_mount+0x228/0x810 fs/namespace.c:3078
path_mount+0x5b4/0xe78 fs/namespace.c:3408
do_mount fs/namespace.c:3421 [inline]
__do_sys_mount fs/namespace.c:3629 [inline]
__se_sys_mount fs/namespace.c:3606 [inline]
__arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
-> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}:
down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
ocfs2_del_inode_from_orphan+0x100/0x608 fs/ocfs2/namei.c:2713
ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline]
ocfs2_dio_end_io+0x3f4/0xed8 fs/ocfs2/aops.c:2431
dio_complete+0x230/0x70c fs/direct-io.c:271
__blockdev_direct_IO+0x2780/0x318c fs/direct-io.c:1326
ocfs2_direct_IO+0x208/0x280 fs/ocfs2/aops.c:2468
generic_file_direct_write+0x31c/0x620 mm/filemap.c:3770
__generic_file_write_iter+0x1bc/0x37c mm/filemap.c:3930
ocfs2_file_write_iter+0x1300/0x1bf4 fs/ocfs2/file.c:2469
call_write_iter include/linux/fs.h:2265 [inline]
aio_write+0x54c/0x798 fs/aio.c:1615
__io_submit_one fs/aio.c:-1 [inline]
io_submit_one+0x7a8/0x11cc fs/aio.c:2034
__do_sys_io_submit fs/aio.c:2093 [inline]
__se_sys_io_submit fs/aio.c:2063 [inline]
__arm64_sys_io_submit+0x268/0x3e4 fs/aio.c:2063
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
-> #1 (&oi->ip_alloc_sem){++++}-{3:3}:
down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
ocfs2_try_remove_refcount_tree+0xb4/0x2d8 fs/ocfs2/refcounttree.c:932
ocfs2_xattr_set+0x45c/0xe98 fs/ocfs2/xattr.c:3673
ocfs2_xattr_trusted_set+0x4c/0x64 fs/ocfs2/xattr.c:7349
__vfs_removexattr+0x370/0x38c fs/xattr.c:479
__vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:514
vfs_removexattr+0x80/0x190 fs/xattr.c:536
ovl_do_removexattr fs/overlayfs/overlayfs.h:270 [inline]
ovl_removexattr fs/overlayfs/overlayfs.h:278 [inline]
ovl_make_workdir fs/overlayfs/super.c:1456 [inline]
ovl_get_workdir+0xa10/0x1068 fs/overlayfs/super.c:1539
ovl_fill_super+0x139c/0x2294 fs/overlayfs/super.c:2095
mount_nodev+0x68/0x104 fs/super.c:1489
ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186
legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
vfs_get_tree+0x90/0x274 fs/super.c:1573
do_new_mount+0x228/0x810 fs/namespace.c:3078
path_mount+0x5b4/0xe78 fs/namespace.c:3408
do_mount fs/namespace.c:3421 [inline]
__do_sys_mount fs/namespace.c:3629 [inline]
__se_sys_mount fs/namespace.c:3606 [inline]
__arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
-> #0 (&oi->ip_xattr_sem){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049
lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
down_read+0x64/0x304 kernel/locking/rwsem.c:1520
ocfs2_calc_xattr_init+0x1c4/0xb9c fs/ocfs2/xattr.c:631
ocfs2_mknod+0xafc/0x1f18 fs/ocfs2/namei.c:330
ocfs2_create+0x19c/0x4f0 fs/ocfs2/namei.c:674
lookup_open fs/namei.c:3490 [inline]
open_last_lookups fs/namei.c:3558 [inline]
path_openat+0x112c/0x2680 fs/namei.c:3788
do_filp_open+0x174/0x344 fs/namei.c:3818
do_sys_openat2+0x128/0x3d8 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__arm64_sys_openat+0x120/0x154 fs/open.c:1345
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
other info that might help us debug this:
Chain exists of:
&oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type] --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
lock(&oi->ip_xattr_sem);
*** DEADLOCK ***
3 locks held by syz.7.404/6865:
#0: ffff0000fac92460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
#1: ffff0000fbce2648 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000fbce2648 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: open_last_lookups fs/namei.c:3555 [inline]
#1: ffff0000fbce2648 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: path_openat+0x5e4/0x2680 fs/namei.c:3788
#2: ffff0000e270c2c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#2: ffff0000e270c2c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3cd4 fs/ocfs2/suballoc.c:782
stack backtrace:
CPU: 0 PID: 6865 Comm: syz.7.404 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack+0x30/0x40 lib/dump_stack.c:88
dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
dump_stack+0x1c/0x5c lib/dump_stack.c:113
print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048
check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049
lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
down_read+0x64/0x304 kernel/locking/rwsem.c:1520
ocfs2_calc_xattr_init+0x1c4/0xb9c fs/ocfs2/xattr.c:631
ocfs2_mknod+0xafc/0x1f18 fs/ocfs2/namei.c:330
ocfs2_create+0x19c/0x4f0 fs/ocfs2/namei.c:674
lookup_open fs/namei.c:3490 [inline]
open_last_lookups fs/namei.c:3558 [inline]
path_openat+0x112c/0x2680 fs/namei.c:3788
do_filp_open+0x174/0x344 fs/namei.c:3818
do_sys_openat2+0x128/0x3d8 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__arm64_sys_openat+0x120/0x154 fs/open.c:1345
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
netlink: 4 bytes leftover after parsing attributes in process `syz.7.404'.
nbd: socks must be embedded in a SOCK_ITEM attr