ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.537/6335 is trying to acquire lock: ffff88805f46a2e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3} , at: ocfs2_read_virt_blocks+0x240/0x8e0 fs/ocfs2/extent_map.c:984 but task is already holding lock: ffff88806106a8e8 (&journal->j_trans_barrier ){.+.+}-{3:3} , at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 ( &journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x1f3/0xac0 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1e1/0x890 fs/ocfs2/super.c:1885 generic_shutdown_super+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x426/0x4d0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #2 (sb_internal#4){.+.+}-{0:0} : percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2868 [inline] ocfs2_extend_dir+0x1054/0x4b90 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x2efd/0x52b0 fs/ocfs2/dir.c:4321 ocfs2_mknod+0x876/0x2510 fs/ocfs2/namei.c:294 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x120a/0x2fb0 fs/namei.c:3747 do_filp_open+0x1df/0x400 fs/namei.c:3777 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_creat fs/open.c:1347 [inline] __se_sys_creat fs/open.c:1341 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1341 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:787 [inline] ocfs2_reserve_local_alloc_bits+0x11c/0x2630 fs/ocfs2/localalloc.c:635 ocfs2_reserve_clusters_with_limit+0x1b6/0xc10 fs/ocfs2/suballoc.c:1184 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2855 [inline] ocfs2_extend_dir+0x755/0x4b90 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x2efd/0x52b0 fs/ocfs2/dir.c:4321 ocfs2_mknod+0x876/0x2510 fs/ocfs2/namei.c:294 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x120a/0x2fb0 fs/namei.c:3747 do_filp_open+0x1df/0x400 fs/namei.c:3777 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_creat fs/open.c:1347 [inline] __se_sys_creat fs/open.c:1341 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1341 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x240/0x8e0 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+0x39d/0x1f90 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1e7b/0x3940 fs/ocfs2/namei.c:1568 vfs_rename+0xd57/0x10f0 fs/namei.c:4840 do_renameat2+0x9e9/0xf70 fs/namei.c:4993 __do_sys_renameat2 fs/namei.c:5026 [inline] __se_sys_renameat2 fs/namei.c:5023 [inline] __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5023 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> sb_internal#4 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#4); lock(&journal->j_trans_barrier); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 8 locks held by syz.1.537/6335: #0: ffff888053c2a460 ( sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff888053c2a748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: lock_rename fs/namei.c:3024 [inline] #1: ffff888053c2a748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: do_renameat2+0x4aa/0xf70 fs/namei.c:4932 #2: ffff88805f7eed88 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #2: ffff88805f7eed88 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff88805f7eed88 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3025 [inline] #2: ffff88805f7eed88 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: do_renameat2+0x541/0xf70 fs/namei.c:4932 #3: ffff88805f46a648 (&sb->s_type->i_mutex_key#31/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff88805f46a648 (&sb->s_type->i_mutex_key#31/5){+.+.}-{3:3}, at: do_renameat2+0x57c/0xf70 fs/namei.c:4932 #4: ffff88805f71c2c8 (&sb->s_type->i_mutex_key#31/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #4: ffff88805f71c2c8 (&sb->s_type->i_mutex_key#31/2){+.+.}-{3:3}, at: vfs_rename+0x7b1/0x10f0 fs/namei.c:4803 #5: ffff888053c2a650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_rename+0x1a51/0x3940 fs/ocfs2/namei.c:1488 #6: ffff88806106a8e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 #7: ffff888054a98990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x12d5/0x1560 fs/jbd2/transaction.c:462 stack backtrace: CPU: 0 PID: 6335 Comm: syz.1.537 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x240/0x8e0 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+0x39d/0x1f90 fs/ocfs2/dir.c:1091 ocfs2_rename+0x1e7b/0x3940 fs/ocfs2/namei.c:1568 vfs_rename+0xd57/0x10f0 fs/namei.c:4840 do_renameat2+0x9e9/0xf70 fs/namei.c:4993 __do_sys_renameat2 fs/namei.c:5026 [inline] __se_sys_renameat2 fs/namei.c:5023 [inline] __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5023 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb66b76ce99 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:00007fb6699c5028 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 00007fb66b9f4fa0 RCX: 00007fb66b76ce99 RDX: 0000000000000004 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007fb66b802eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000380 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb66b9f5038 R14: 00007fb66b9f4fa0 R15: 00007fff585aea38