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.6.828/8330 is trying to acquire lock: ffff8880515b3480 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff8880515b3480 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4910 fs/ocfs2/suballoc.c:788 but task is already holding lock: ffff888058f8b1b8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x429/0x2a80 fs/ocfs2/xattr.c:3583 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 ocfs2_mknod+0xd5c/0x2540 fs/ocfs2/namei.c:413 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:676 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3708 open_last_lookups fs/namei.c:3807 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4043 do_filp_open+0x20b/0x470 fs/namei.c:4073 do_sys_openat2+0x11b/0x1d0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #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:374 ocfs2_local_alloc_slide_window+0x44c/0x18c0 fs/ocfs2/localalloc.c:1254 ocfs2_reserve_local_alloc_bits+0x4f0/0xc60 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x695/0xe80 fs/ocfs2/suballoc.c:1168 ocfs2_expand_inline_dir.constprop.0+0x48d/0x4160 fs/ocfs2/dir.c:2862 ocfs2_extend_dir+0x1db/0x1c80 fs/ocfs2/dir.c:3207 ocfs2_prepare_dir_for_insert+0x1293/0x1700 fs/ocfs2/dir.c:4312 ocfs2_mknod+0x922/0x2540 fs/ocfs2/namei.c:297 ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:659 vfs_mkdir+0x593/0x8c0 fs/namei.c:4366 do_mkdirat+0x304/0x3e0 fs/namei.c:4399 __do_sys_mkdirat fs/namei.c:4416 [inline] __se_sys_mkdirat fs/namei.c:4414 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4414 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:372 ocfs2_local_alloc_slide_window+0x44c/0x18c0 fs/ocfs2/localalloc.c:1254 ocfs2_reserve_local_alloc_bits+0x4f0/0xc60 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x695/0xe80 fs/ocfs2/suballoc.c:1168 ocfs2_expand_inline_dir.constprop.0+0x48d/0x4160 fs/ocfs2/dir.c:2862 ocfs2_extend_dir+0x1db/0x1c80 fs/ocfs2/dir.c:3207 ocfs2_prepare_dir_for_insert+0x1293/0x1700 fs/ocfs2/dir.c:4312 ocfs2_mknod+0x922/0x2540 fs/ocfs2/namei.c:297 ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:659 vfs_mkdir+0x593/0x8c0 fs/namei.c:4366 do_mkdirat+0x304/0x3e0 fs/namei.c:4399 __do_sys_mkdirat fs/namei.c:4416 [inline] __se_sys_mkdirat fs/namei.c:4414 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4414 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (sb_internal#4){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs.h:1798 [inline] sb_start_intwrite include/linux/fs.h:1981 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:370 ocfs2_local_alloc_slide_window+0x44c/0x18c0 fs/ocfs2/localalloc.c:1254 ocfs2_reserve_local_alloc_bits+0x4f0/0xc60 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x695/0xe80 fs/ocfs2/suballoc.c:1168 ocfs2_expand_inline_dir.constprop.0+0x48d/0x4160 fs/ocfs2/dir.c:2862 ocfs2_extend_dir+0x1db/0x1c80 fs/ocfs2/dir.c:3207 ocfs2_prepare_dir_for_insert+0x1293/0x1700 fs/ocfs2/dir.c:4312 ocfs2_mknod+0x922/0x2540 fs/ocfs2/namei.c:297 ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:659 vfs_mkdir+0x593/0x8c0 fs/namei.c:4366 do_mkdirat+0x304/0x3e0 fs/namei.c:4399 __do_sys_mkdirat fs/namei.c:4416 [inline] __se_sys_mkdirat fs/namei.c:4414 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4414 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:869 [inline] ocfs2_reserve_suballoc_bits+0x11c/0x4910 fs/ocfs2/suballoc.c:788 ocfs2_reserve_cluster_bitmap_bits+0xd6/0x1e0 fs/ocfs2/suballoc.c:1134 ocfs2_reserve_clusters_with_limit+0x148/0xe80 fs/ocfs2/suballoc.c:1179 ocfs2_mknod+0xabc/0x2540 fs/ocfs2/namei.c:357 ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:659 vfs_mkdir+0x593/0x8c0 fs/namei.c:4366 do_mkdirat+0x304/0x3e0 fs/namei.c:4399 __do_sys_mkdirat fs/namei.c:4416 [inline] __se_sys_mkdirat fs/namei.c:4414 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4414 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write+0x92/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:869 [inline] ocfs2_reserve_suballoc_bits+0x11c/0x4910 fs/ocfs2/suballoc.c:788 ocfs2_reserve_new_metadata_blocks+0x52c/0xc70 fs/ocfs2/suballoc.c:984 ocfs2_init_xattr_set_ctxt fs/ocfs2/xattr.c:3277 [inline] ocfs2_xattr_set+0x184c/0x2a80 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x175/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x145/0x360 fs/xattr.c:321 do_setxattr+0x145/0x180 fs/xattr.c:636 filename_setxattr+0x16b/0x1d0 fs/xattr.c:665 path_setxattrat+0x1de/0x2a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xc6/0x140 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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: &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --> jbd2_handle --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.6.828/8330: #0: ffff88802374e428 (sb_writers#16){.+.+}-{0:0}, at: filename_setxattr+0xbb/0x1d0 fs/xattr.c:663 #1: ffff888058f8b480 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff888058f8b480 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: vfs_setxattr+0x122/0x360 fs/xattr.c:320 #2: ffff888058f8b1b8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x429/0x2a80 fs/ocfs2/xattr.c:3583 stack backtrace: CPU: 1 UID: 0 PID: 8330 Comm: syz.6.828 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 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:2043 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write+0x92/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:869 [inline] ocfs2_reserve_suballoc_bits+0x11c/0x4910 fs/ocfs2/suballoc.c:788 ocfs2_reserve_new_metadata_blocks+0x52c/0xc70 fs/ocfs2/suballoc.c:984 ocfs2_init_xattr_set_ctxt fs/ocfs2/xattr.c:3277 [inline] ocfs2_xattr_set+0x184c/0x2a80 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x175/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x145/0x360 fs/xattr.c:321 do_setxattr+0x145/0x180 fs/xattr.c:636 filename_setxattr+0x16b/0x1d0 fs/xattr.c:665 path_setxattrat+0x1de/0x2a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xc6/0x140 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda94b8ebe9 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:00007fda959ea038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007fda94db5fa0 RCX: 00007fda94b8ebe9 RDX: 0000200000001f00 RSI: 0000200000000140 RDI: 0000200000000100 RBP: 00007fda94c11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000e00f R11: 0000000000000246 R12: 0000000000000000 R13: 00007fda94db6038 R14: 00007fda94db5fa0 R15: 00007ffd62a81d38