ocfs2: Slot 0 on device (7,4) was already allocated to this node! ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. overlayfs: upper fs does not support tmpfile. ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc5-syzkaller-00193-g40f92e79b0aa #0 Not tainted ------------------------------------------------------ syz.4.4000/17229 is trying to acquire lock: ffff888052e809c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff888052e809c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_remove_inode+0x15b/0x8a0 fs/ocfs2/inode.c:669 but task is already holding lock: ffff888052e85f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff888052e85f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2d5/0x1210 fs/ocfs2/inode.c:790 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]){+.+.}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_del_inode_from_orphan+0x112/0x700 fs/ocfs2/namei.c:2727 ocfs2_dio_end_io_write+0x2cb/0xf30 fs/ocfs2/aops.c:2303 ocfs2_dio_end_io+0x136/0x2c0 fs/ocfs2/aops.c:2401 dio_complete+0x224/0x970 fs/direct-io.c:281 __blockdev_direct_IO+0x348f/0x4180 fs/direct-io.c:1303 ocfs2_direct_IO+0x263/0x360 fs/ocfs2/aops.c:2438 generic_file_direct_write+0x19a/0x410 mm/filemap.c:4046 __generic_file_write_iter+0x11b/0x240 mm/filemap.c:4215 ocfs2_file_write_iter+0xbc4/0x21b0 fs/ocfs2/file.c:2469 iter_file_splice_write+0x91f/0x1150 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x192/0x6c0 fs/splice.c:1158 splice_direct_to_actor+0x345/0xa30 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1227 do_sendfile+0xb06/0xe50 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1577 ocfs2_create_local_dquot+0x157/0xb30 fs/ocfs2/quota_local.c:1227 ocfs2_acquire_dquot+0x626/0xb00 fs/ocfs2/quota_global.c:883 dqget+0x693/0x1180 fs/quota/dquot.c:977 __dquot_initialize+0x586/0xd50 fs/quota/dquot.c:1505 ocfs2_get_init_inode+0xe7/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x974/0x2540 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:656 vfs_mkdir+0x593/0x8c0 fs/namei.c:4375 do_mkdirat+0x304/0x3e0 fs/namei.c:4408 __do_sys_mkdirat fs/namei.c:4425 [inline] __se_sys_mkdirat fs/namei.c:4423 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4423 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&dquot->dq_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:602 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x5f1/0x1180 fs/quota/dquot.c:972 __dquot_initialize+0x586/0xd50 fs/quota/dquot.c:1505 ocfs2_get_init_inode+0xe7/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x974/0x2540 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:656 vfs_mkdir+0x593/0x8c0 fs/namei.c:4375 do_mkdirat+0x304/0x3e0 fs/namei.c:4408 __do_sys_mkdirat fs/namei.c:4425 [inline] __se_sys_mkdirat fs/namei.c:4423 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4423 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_remove_inode+0x15b/0x8a0 fs/ocfs2/inode.c:669 ocfs2_wipe_inode+0x446/0x1210 fs/ocfs2/inode.c:832 ocfs2_delete_inode fs/ocfs2/inode.c:1093 [inline] ocfs2_evict_inode+0x6e0/0x1680 fs/ocfs2/inode.c:1230 evict+0x3e6/0x920 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput fs/inode.c:1924 [inline] iput+0x521/0x880 fs/inode.c:1910 ocfs2_dentry_iput+0x139/0x330 fs/ocfs2/dcache.c:407 dentry_unlink_inode+0x282/0x480 fs/dcache.c:464 __dentry_kill+0x1d0/0x600 fs/dcache.c:669 dput.part.0+0x4b1/0x9b0 fs/dcache.c:911 dput+0x1f/0x30 fs/dcache.c:901 ovl_check_rename_whiteout fs/overlayfs/super.c:605 [inline] ovl_make_workdir fs/overlayfs/super.c:704 [inline] ovl_get_workdir fs/overlayfs/super.c:827 [inline] ovl_fill_super+0x1335/0x67a0 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1325 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1344 vfs_get_tree+0x8e/0x340 fs/super.c:1804 do_new_mount fs/namespace.c:3902 [inline] path_mount+0x1414/0x2020 fs/namespace.c:4226 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount fs/namespace.c:4427 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); *** DEADLOCK *** 5 locks held by syz.4.4000/17229: #0: ffff88807a6c40e0 (&type->s_umount_key#85/1){+.+.}-{4:4}, at: alloc_super+0x235/0xbd0 fs/super.c:345 #1: ffff88803340c428 (sb_writers#28){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:665 [inline] #1: ffff88803340c428 (sb_writers#28){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:827 [inline] #1: ffff88803340c428 (sb_writers#28){.+.+}-{0:0}, at: ovl_fill_super+0xe60/0x67a0 fs/overlayfs/super.c:1406 #2: ffff88804b976d80 (&sb->s_type->i_mutex_key#35/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #2: ffff88804b976d80 (&sb->s_type->i_mutex_key#35/1){+.+.}-{4:4}, at: ovl_check_rename_whiteout fs/overlayfs/super.c:567 [inline] #2: ffff88804b976d80 (&sb->s_type->i_mutex_key#35/1){+.+.}-{4:4}, at: ovl_make_workdir fs/overlayfs/super.c:704 [inline] #2: ffff88804b976d80 (&sb->s_type->i_mutex_key#35/1){+.+.}-{4:4}, at: ovl_get_workdir fs/overlayfs/super.c:827 [inline] #2: ffff88804b976d80 (&sb->s_type->i_mutex_key#35/1){+.+.}-{4:4}, at: ovl_fill_super+0x11ec/0x67a0 fs/overlayfs/super.c:1406 #3: ffff88802844cbd0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0xe4/0x2e0 fs/ocfs2/dlmglue.c:2875 #4: ffff888052e85f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #4: ffff888052e85f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2d5/0x1210 fs/ocfs2/inode.c:790 stack backtrace: CPU: 1 UID: 0 PID: 17229 Comm: syz.4.4000 Not tainted 6.16.0-rc5-syzkaller-00193-g40f92e79b0aa #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_write+0x92/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_remove_inode+0x15b/0x8a0 fs/ocfs2/inode.c:669 ocfs2_wipe_inode+0x446/0x1210 fs/ocfs2/inode.c:832 ocfs2_delete_inode fs/ocfs2/inode.c:1093 [inline] ocfs2_evict_inode+0x6e0/0x1680 fs/ocfs2/inode.c:1230 evict+0x3e6/0x920 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput fs/inode.c:1924 [inline] iput+0x521/0x880 fs/inode.c:1910 ocfs2_dentry_iput+0x139/0x330 fs/ocfs2/dcache.c:407 dentry_unlink_inode+0x282/0x480 fs/dcache.c:464 __dentry_kill+0x1d0/0x600 fs/dcache.c:669 dput.part.0+0x4b1/0x9b0 fs/dcache.c:911 dput+0x1f/0x30 fs/dcache.c:901 ovl_check_rename_whiteout fs/overlayfs/super.c:605 [inline] ovl_make_workdir fs/overlayfs/super.c:704 [inline] ovl_get_workdir fs/overlayfs/super.c:827 [inline] ovl_fill_super+0x1335/0x67a0 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1325 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1344 vfs_get_tree+0x8e/0x340 fs/super.c:1804 do_new_mount fs/namespace.c:3902 [inline] path_mount+0x1414/0x2020 fs/namespace.c:4226 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount fs/namespace.c:4427 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4bcd38e929 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4bce20d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4bcd5b5fa0 RCX: 00007f4bcd38e929 RDX: 0000200000000000 RSI: 0000200000000100 RDI: 0000000000000000 RBP: 00007f4bcd410b39 R08: 0000200000000240 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4bcd5b5fa0 R15: 00007fff6d05d058 overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: failed to set xattr on upper overlayfs: ...falling back to redirect_dir=nofollow. overlayfs: ...falling back to index=off. overlayfs: ...falling back to uuid=null. overlayfs: upper fs missing required features.