ocfs2: Slot 0 on device (7,0) was already allocated to this node! JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.2360/11160 is trying to acquire lock: ffff888054395be0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x266/0x980 fs/ocfs2/extent_map.c:984 but task is already holding lock: ffff888054392648 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:799 [inline] ffff888054392648 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: vfs_rename+0x7b1/0x10f0 fs/namei.c:4888 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}: down_write_nested+0x39/0x60 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:799 [inline] __ocfs2_reflink+0xca4/0x16d0 fs/ocfs2/refcounttree.c:4202 ocfs2_reflink+0x4e4/0x920 fs/ocfs2/refcounttree.c:4301 ocfs2_vfs_reflink+0x333/0x450 fs/ocfs2/refcounttree.c:4427 ocfs2_reflink_ioctl+0x39c/0x440 fs/ocfs2/refcounttree.c:4467 ocfs2_ioctl+0x584/0x7c0 fs/ocfs2/ioctl.c:913 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856 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 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3162 [inline] check_prevs_add kernel/locking/lockdep.c:3281 [inline] validate_chain kernel/locking/lockdep.c:3897 [inline] __lock_acquire+0x3a03/0x7ea0 kernel/locking/lockdep.c:5171 lock_acquire+0x1bc/0x4a0 kernel/locking/lockdep.c:5790 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x266/0x980 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+0x3a8/0x2080 fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0x102/0x390 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017 ocfs2_check_if_ancestor+0x112/0x3c0 fs/ocfs2/namei.c:1073 ocfs2_double_lock+0x41a/0xcb0 fs/ocfs2/namei.c:1142 ocfs2_rename+0xc7f/0x3930 fs/ocfs2/namei.c:1296 vfs_rename+0xd57/0x10f0 fs/namei.c:4925 do_renameat2+0x8ac/0xc80 fs/namei.c:5078 __do_sys_rename fs/namei.c:5124 [inline] __se_sys_rename fs/namei.c:5122 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5122 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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#29/2); lock(&ocfs2_file_ip_alloc_sem_key); lock(&sb->s_type->i_mutex_key#29/2); rlock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 5 locks held by syz.0.2360/11160: #0: ffff8880739d8460 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402 #1: ffff8880739d8748 (&type->s_vfs_rename_key#5){+.+.}-{3:3}, at: lock_rename fs/namei.c:3089 [inline] #1: ffff8880739d8748 (&type->s_vfs_rename_key#5){+.+.}-{3:3}, at: do_renameat2+0x36a/0xc80 fs/namei.c:5017 #2: ffff88805401a648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:799 [inline] #2: ffff88805401a648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff88805401a648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3090 [inline] #2: ffff88805401a648 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: do_renameat2+0x401/0xc80 fs/namei.c:5017 #3: ffff888054395f48 (&sb->s_type->i_mutex_key#29/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff888054395f48 (&sb->s_type->i_mutex_key#29/5){+.+.}-{3:3}, at: do_renameat2+0x43c/0xc80 fs/namei.c:5017 #4: ffff888054392648 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:799 [inline] #4: ffff888054392648 (&sb->s_type->i_mutex_key#29/2){+.+.}-{3:3}, at: vfs_rename+0x7b1/0x10f0 fs/namei.c:4888 stack backtrace: CPU: 0 PID: 11160 Comm: syz.0.2360 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x2f8/0x400 kernel/locking/lockdep.c:2215 check_prev_add kernel/locking/lockdep.c:3162 [inline] check_prevs_add kernel/locking/lockdep.c:3281 [inline] validate_chain kernel/locking/lockdep.c:3897 [inline] __lock_acquire+0x3a03/0x7ea0 kernel/locking/lockdep.c:5171 lock_acquire+0x1bc/0x4a0 kernel/locking/lockdep.c:5790 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x266/0x980 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+0x3a8/0x2080 fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0x102/0x390 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017 ocfs2_check_if_ancestor+0x112/0x3c0 fs/ocfs2/namei.c:1073 ocfs2_double_lock+0x41a/0xcb0 fs/ocfs2/namei.c:1142 ocfs2_rename+0xc7f/0x3930 fs/ocfs2/namei.c:1296 vfs_rename+0xd57/0x10f0 fs/namei.c:4925 do_renameat2+0x8ac/0xc80 fs/namei.c:5078 __do_sys_rename fs/namei.c:5124 [inline] __se_sys_rename fs/namei.c:5122 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5122 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: 0033:0x7ffad059f559 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:00007ffad1470028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007ffad0825fa0 RCX: 00007ffad059f559 RDX: 0000000000000000 RSI: 00002000000061c0 RDI: 0000200000006180 RBP: 00007ffad0636b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffad0826038 R14: 00007ffad0825fa0 R15: 00007ffe757b33a8