====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-00275-gbec6f00f120e #0 Not tainted ------------------------------------------------------ syz.8.1912/11165 is trying to acquire lock: ffff888059f01538 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 but task is already holding lock: ffff88802ab24950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (jbd2_handle){++++}-{0:0}: start_this_handle+0x5ea/0x1410 fs/jbd2/transaction.c:444 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x3b9/0x970 fs/ocfs2/journal.c:352 ocfs2_shutdown_local_alloc+0x281/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1ed/0x9f0 fs/ocfs2/super.c:1822 generic_shutdown_super+0x156/0x390 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1710 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506 [inline] deactivate_super+0xde/0x100 fs/super.c:502 cleanup_mnt+0x225/0x450 fs/namespace.c:1431 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:350 ocfs2_shutdown_local_alloc+0x281/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1ed/0x9f0 fs/ocfs2/super.c:1822 generic_shutdown_super+0x156/0x390 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1710 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506 [inline] deactivate_super+0xde/0x100 fs/super.c:502 cleanup_mnt+0x225/0x450 fs/namespace.c:1431 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#2){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:348 ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline] ocfs2_truncate_file+0x3ef/0x17c0 fs/ocfs2/file.c:500 ocfs2_setattr+0x1594/0x2560 fs/ocfs2/file.c:1212 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15b/0x220 fs/open.c:65 handle_truncate fs/namei.c:3501 [inline] do_open fs/namei.c:3884 [inline] path_openat+0x2761/0x2d40 fs/namei.c:4039 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&oi->ip_alloc_sem){+.+.}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1577 ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xbba/0x17c0 fs/ocfs2/file.c:521 ocfs2_setattr+0x1594/0x2560 fs/ocfs2/file.c:1212 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x15b/0x220 fs/open.c:65 handle_truncate fs/namei.c:3501 [inline] do_open fs/namei.c:3884 [inline] path_openat+0x2761/0x2d40 fs/namei.c:4039 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 ocfs2_mknod+0xd5c/0x2540 fs/ocfs2/namei.c:410 vfs_mknod+0x5da/0x8e0 fs/namei.c:4228 do_mknodat+0x30f/0x5d0 fs/namei.c:4288 __do_sys_mknod fs/namei.c:4311 [inline] __se_sys_mknod fs/namei.c:4309 [inline] __x64_sys_mknod+0x87/0xb0 fs/namei.c:4309 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 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: &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.8.1912/11165: #0: ffff88806a3ea420 (sb_writers#28){.+.+}-{0:0}, at: filename_create+0x10e/0x4a0 fs/namei.c:4125 #1: ffff888059f01800 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #1: ffff888059f01800 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: filename_create+0x1bb/0x4a0 fs/namei.c:4132 #2: ffff888059f009c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #2: ffff888059f009c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x48d0 fs/ocfs2/suballoc.c:786 #3: ffff888059f06d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #3: ffff888059f06d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x48d0 fs/ocfs2/suballoc.c:786 #4: ffff888059e52640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #4: ffff888059e52640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0xee/0xc60 fs/ocfs2/localalloc.c:636 #5: ffff88806a3ea610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0xc19/0x2540 fs/ocfs2/namei.c:361 #6: ffff888054be64e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:350 #7: ffff88802ab24950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444 stack backtrace: CPU: 0 UID: 0 PID: 11165 Comm: syz.8.1912 Not tainted 6.15.0-rc5-syzkaller-00275-gbec6f00f120e #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:2079 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 ocfs2_mknod+0xd5c/0x2540 fs/ocfs2/namei.c:410 vfs_mknod+0x5da/0x8e0 fs/namei.c:4228 do_mknodat+0x30f/0x5d0 fs/namei.c:4288 __do_sys_mknod fs/namei.c:4311 [inline] __se_sys_mknod fs/namei.c:4309 [inline] __x64_sys_mknod+0x87/0xb0 fs/namei.c:4309 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd007b8e969 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:00007fd008a7b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 00007fd007db5fa0 RCX: 00007fd007b8e969 RDX: 0000000000000711 RSI: 0000000000002000 RDI: 0000200000000000 RBP: 00007fd007c10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd007db5fa0 R15: 00007ffdb9a1fe78