ocfs2: Mounting device (7,6) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.6.4758/20008 is trying to acquire lock: ffff88805dff3120 (&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: ffff88805f10a4e8 (&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: -> #2 (&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_mknod+0xf70/0x2510 fs/ocfs2/namei.c:361 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_open fs/open.c:1279 [inline] __se_sys_open fs/open.c:1275 [inline] __x64_sys_open+0x11b/0x140 fs/open.c:1275 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 (sb_internal#3){.+.+}-{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_write_begin_inline fs/ocfs2/aops.c:1484 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1587 [inline] ocfs2_write_begin_nolock+0x207c/0x44b0 fs/ocfs2/aops.c:1673 ocfs2_write_begin+0x1b4/0x310 fs/ocfs2/aops.c:1907 generic_perform_write+0x2b6/0x550 mm/filemap.c:3785 __generic_file_write_iter+0x261/0x4e0 mm/filemap.c:3912 ocfs2_file_write_iter+0x171a/0x1ee0 fs/ocfs2/file.c:2472 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x748/0xd70 fs/read_write.c:594 ksys_write+0x153/0x260 fs/read_write.c:647 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#3 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#3); lock(&journal->j_trans_barrier); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 8 locks held by syz.6.4758/20008: #0: ffff8880721fc460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff8880721fc748 (&type->s_vfs_rename_key#10){+.+.}-{3:3}, at: lock_rename fs/namei.c:3024 [inline] #1: ffff8880721fc748 (&type->s_vfs_rename_key#10){+.+.}-{3:3}, at: do_renameat2+0x4aa/0xf70 fs/namei.c:4932 #2: ffff88805750ed88 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #2: ffff88805750ed88 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff88805750ed88 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3025 [inline] #2: ffff88805750ed88 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: do_renameat2+0x541/0xf70 fs/namei.c:4932 #3: ffff88805dff3488 (&sb->s_type->i_mutex_key#22/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff88805dff3488 (&sb->s_type->i_mutex_key#22/5){+.+.}-{3:3}, at: do_renameat2+0x57c/0xf70 fs/namei.c:4932 #4: ffff88805dff42c8 (&sb->s_type->i_mutex_key#22/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #4: ffff88805dff42c8 (&sb->s_type->i_mutex_key#22/2){+.+.}-{3:3}, at: vfs_rename+0x7b1/0x10f0 fs/namei.c:4803 #5: ffff8880721fc650 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_rename+0x1a51/0x3940 fs/ocfs2/namei.c:1488 #6: ffff88805f10a4e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 #7: ffff88801fcfc990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x12d5/0x1560 fs/jbd2/transaction.c:462 stack backtrace: CPU: 0 PID: 20008 Comm: syz.6.4758 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: 0033:0x7f028ced0e99 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:00007f028b129028 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 00007f028d158fa0 RCX: 00007f028ced0e99 RDX: 0000000000000004 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007f028cf66eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000380 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f028d159038 R14: 00007f028d158fa0 R15: 00007ffdfba54258