====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.6114/27838 is trying to acquire lock: ffff888072b6ed88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline] ffff888072b6ed88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4810 fs/ocfs2/suballoc.c:804 but task is already holding lock: ffff88807292ce38 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x491/0x1390 fs/ocfs2/xattr.c:3593 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&oi->ip_xattr_sem){++++}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365 ocfs2_mknod+0x18e0/0x2580 fs/ocfs2/namei.c:410 ocfs2_create+0x1b6/0x4b0 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3533 [inline] open_last_lookups fs/namei.c:3601 [inline] path_openat+0x11b9/0x2f10 fs/namei.c:3831 do_filp_open+0x1ee/0x420 fs/namei.c:3861 do_sys_openat2+0x14b/0x4f0 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1347 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 -> #3 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:703 [inline] ocfs2_reserve_suballoc_bits+0x7dd/0x4810 fs/ocfs2/suballoc.c:850 ocfs2_reserve_new_metadata_blocks+0x412/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2838 [inline] ocfs2_extend_dir+0xd70/0x4c40 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x3217/0x5600 fs/ocfs2/dir.c:4321 ocfs2_mknod+0xb46/0x2580 fs/ocfs2/namei.c:294 ocfs2_mkdir+0x1b6/0x4b0 fs/ocfs2/namei.c:657 vfs_mkdir+0x386/0x570 fs/namei.c:4157 do_mkdirat+0x1d8/0x440 fs/namei.c:4182 __do_sys_mkdirat fs/namei.c:4197 [inline] __se_sys_mkdirat fs/namei.c:4195 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4195 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 -> #2 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1897 [inline] sb_start_intwrite include/linux/fs.h:2019 [inline] ocfs2_start_trans+0x2a5/0x6f0 fs/ocfs2/journal.c:372 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:703 [inline] ocfs2_reserve_suballoc_bits+0x7dd/0x4810 fs/ocfs2/suballoc.c:850 ocfs2_reserve_new_metadata_blocks+0x412/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2838 [inline] ocfs2_extend_dir+0xd70/0x4c40 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x3217/0x5600 fs/ocfs2/dir.c:4321 ocfs2_mknod+0xb46/0x2580 fs/ocfs2/namei.c:294 ocfs2_mkdir+0x1b6/0x4b0 fs/ocfs2/namei.c:657 vfs_mkdir+0x386/0x570 fs/namei.c:4157 do_mkdirat+0x1d8/0x440 fs/namei.c:4182 __do_sys_mkdirat fs/namei.c:4197 [inline] __se_sys_mkdirat fs/namei.c:4195 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4195 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 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:764 [inline] ocfs2_reserve_suballoc_bits+0x16a/0x4810 fs/ocfs2/suballoc.c:804 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1150 [inline] ocfs2_reserve_clusters_with_limit+0x3b9/0xc10 fs/ocfs2/suballoc.c:1195 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:692 [inline] ocfs2_reserve_suballoc_bits+0x7bd/0x4810 fs/ocfs2/suballoc.c:850 ocfs2_reserve_new_metadata_blocks+0x412/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2838 [inline] ocfs2_extend_dir+0xd70/0x4c40 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x3217/0x5600 fs/ocfs2/dir.c:4321 ocfs2_mknod+0xb46/0x2580 fs/ocfs2/namei.c:294 ocfs2_mkdir+0x1b6/0x4b0 fs/ocfs2/namei.c:657 vfs_mkdir+0x386/0x570 fs/namei.c:4157 do_mkdirat+0x1d8/0x440 fs/namei.c:4182 __do_sys_mkdirat fs/namei.c:4197 [inline] __se_sys_mkdirat fs/namei.c:4195 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4195 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_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2d18/0x7c40 kernel/locking/lockdep.c:5063 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:764 [inline] ocfs2_reserve_suballoc_bits+0x16a/0x4810 fs/ocfs2/suballoc.c:804 ocfs2_reserve_new_metadata_blocks+0x412/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_init_xattr_set_ctxt+0x314/0x7b0 fs/ocfs2/xattr.c:3287 ocfs2_xattr_set+0xc71/0x1390 fs/ocfs2/xattr.c:3644 __vfs_setxattr+0x3d8/0x410 fs/xattr.c:182 __vfs_setxattr_noperm+0x126/0x5e0 fs/xattr.c:216 vfs_setxattr+0x167/0x2e0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x2a3/0x330 fs/xattr.c:617 __do_sys_fsetxattr fs/xattr.c:673 [inline] __se_sys_fsetxattr+0x15e/0x1d0 fs/xattr.c:662 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: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); *** DEADLOCK *** 3 locks held by syz.0.6114/27838: #0: ffff88807c262460 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write_file+0x5c/0x200 fs/namespace.c:446 #1: ffff88807292d108 (&sb->s_type->i_mutex_key#50){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline] #1: ffff88807292d108 (&sb->s_type->i_mutex_key#50){+.+.}-{3:3}, at: vfs_setxattr+0x140/0x2e0 fs/xattr.c:308 #2: ffff88807292ce38 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x491/0x1390 fs/ocfs2/xattr.c:3593 stack backtrace: CPU: 1 PID: 27838 Comm: syz.0.6114 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2d18/0x7c40 kernel/locking/lockdep.c:5063 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:764 [inline] ocfs2_reserve_suballoc_bits+0x16a/0x4810 fs/ocfs2/suballoc.c:804 ocfs2_reserve_new_metadata_blocks+0x412/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_init_xattr_set_ctxt+0x314/0x7b0 fs/ocfs2/xattr.c:3287 ocfs2_xattr_set+0xc71/0x1390 fs/ocfs2/xattr.c:3644 __vfs_setxattr+0x3d8/0x410 fs/xattr.c:182 __vfs_setxattr_noperm+0x126/0x5e0 fs/xattr.c:216 vfs_setxattr+0x167/0x2e0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x2a3/0x330 fs/xattr.c:617 __do_sys_fsetxattr fs/xattr.c:673 [inline] __se_sys_fsetxattr+0x15e/0x1d0 fs/xattr.c:662 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: 0033:0x7f7ea879e159 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:00007f7ea96e9028 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00007f7ea8a26270 RCX: 00007f7ea879e159 RDX: 0000200000000080 RSI: 0000200000000000 RDI: 0000000000000006 RBP: 00007f7ea883503b R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffdf R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7ea8a26308 R14: 00007f7ea8a26270 R15: 00007ffd9e2c7098