ocfs2: Slot 0 on device (7,9) was already allocated to this node! JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,9) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.9.1298/8629 is trying to acquire lock: ffff888050638660 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x25d/0x970 fs/ocfs2/extent_map.c:984 but task is already holding lock: ffff8880293b50e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe0/0x4c0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x13c8/0x1750 fs/ocfs2/quota_local.c:764 dquot_load_quota_sb+0x756/0xac0 fs/quota/dquot.c:2470 dquot_load_quota_inode+0x2d8/0x5d0 fs/quota/dquot.c:2507 ocfs2_enable_quotas+0x1c5/0x490 fs/ocfs2/super.c:926 ocfs2_fill_super+0x43b5/0x5090 fs/ocfs2/super.c:1139 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x2a5/0x6f0 fs/ocfs2/journal.c:372 ocfs2_setattr+0x1191/0x1d30 fs/ocfs2/file.c:1251 notify_change+0xc74/0xf40 fs/attr.c:499 chown_common+0x4a0/0x660 fs/open.c:736 do_fchownat+0x147/0x240 fs/open.c:767 __do_sys_chown fs/open.c:787 [inline] __se_sys_chown fs/open.c:785 [inline] __x64_sys_chown+0x7e/0x90 fs/open.c:785 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&oi->ip_alloc_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+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x25d/0x970 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3c1/0x2180 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1e72/0x3950 fs/ocfs2/namei.c:1568 vfs_rename+0xbe1/0x1100 fs/namei.c:4882 do_renameat2+0x8e5/0xce0 fs/namei.c:5035 __do_sys_rename fs/namei.c:5081 [inline] __se_sys_rename fs/namei.c:5079 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5079 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> sb_internal#5 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#5); lock(&journal->j_trans_barrier); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 8 locks held by syz.9.1298/8629: #0: ffff888027a06460 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402 #1: ffff888027a06748 (&type->s_vfs_rename_key#8){+.+.}-{3:3}, at: lock_rename fs/namei.c:3046 [inline] #1: ffff888027a06748 (&type->s_vfs_rename_key#8){+.+.}-{3:3}, at: do_renameat2+0x363/0xce0 fs/namei.c:4974 #2: ffff8880506389c8 (&sb->s_type->i_mutex_key#38/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #2: ffff8880506389c8 (&sb->s_type->i_mutex_key#38/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff8880506389c8 (&sb->s_type->i_mutex_key#38/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3047 [inline] #2: ffff8880506389c8 (&sb->s_type->i_mutex_key#38/1){+.+.}-{3:3}, at: do_renameat2+0x3fa/0xce0 fs/namei.c:4974 #3: ffff88805063a648 (&sb->s_type->i_mutex_key#38/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff88805063a648 (&sb->s_type->i_mutex_key#38/5){+.+.}-{3:3}, at: do_renameat2+0x435/0xce0 fs/namei.c:4974 #4: ffff888050639808 (&sb->s_type->i_mutex_key#38/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #4: ffff888050639808 (&sb->s_type->i_mutex_key#38/2){+.+.}-{3:3}, at: vfs_rename+0x792/0x1100 fs/namei.c:4845 #5: ffff888027a06650 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_rename+0x1a48/0x3950 fs/ocfs2/namei.c:1488 #6: ffff8880293b50e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 #7: ffff888055600990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x200f/0x2230 fs/jbd2/transaction.c:463 stack backtrace: CPU: 1 PID: 8629 Comm: syz.9.1298 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 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+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x25d/0x970 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3c1/0x2180 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1e72/0x3950 fs/ocfs2/namei.c:1568 vfs_rename+0xbe1/0x1100 fs/namei.c:4882 do_renameat2+0x8e5/0xce0 fs/namei.c:5035 __do_sys_rename fs/namei.c:5081 [inline] __se_sys_rename fs/namei.c:5079 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5079 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8d5c79c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8d5a9f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f8d5ca15fa0 RCX: 00007f8d5c79c799 RDX: 0000000000000000 RSI: 0000200000000a00 RDI: 0000200000000180 RBP: 00007f8d5c832c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8d5ca16038 R14: 00007f8d5ca15fa0 R15: 00007ffcef541488