ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.4340/16016 is trying to acquire lock: ffff8880599fdf58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff8880599fdf58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804 but task is already holding lock: ffff88805995dc78 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x495/0x13a0 fs/ocfs2/xattr.c:3583 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+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x30a/0x770 fs/ocfs2/acl.c:366 ocfs2_mknod+0x1427/0x2310 fs/ocfs2/namei.c:410 ocfs2_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x2a5/0x470 fs/namei.c:4125 do_mkdirat+0x1dc/0x450 fs/namei.c:4148 __do_sys_mkdirat fs/namei.c:4163 [inline] __se_sys_mkdirat fs/namei.c:4161 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4161 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #3 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x3a8/0x6f0 fs/ocfs2/journal.c:372 ocfs2_symlink+0x117a/0x2730 fs/ocfs2/namei.c:1918 vfs_symlink+0x138/0x2b0 fs/namei.c:4485 do_symlinkat+0x1ba/0x400 fs/namei.c:4511 __do_sys_symlink fs/namei.c:4532 [inline] __se_sys_symlink fs/namei.c:4530 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4530 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (sb_internal#2){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1633 [inline] sb_start_intwrite include/linux/fs.h:1755 [inline] ocfs2_start_trans+0x2a9/0x6f0 fs/ocfs2/journal.c:370 ocfs2_symlink+0x117a/0x2730 fs/ocfs2/namei.c:1918 vfs_symlink+0x138/0x2b0 fs/namei.c:4485 do_symlinkat+0x1ba/0x400 fs/namei.c:4511 __do_sys_symlink fs/namei.c:4532 [inline] __se_sys_symlink fs/namei.c:4530 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4530 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 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+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_local_alloc_bits+0x120/0x2620 fs/ocfs2/localalloc.c:635 ocfs2_reserve_clusters_with_limit+0x1ba/0xc20 fs/ocfs2/suballoc.c:1184 ocfs2_mknod+0xed1/0x2310 fs/ocfs2/namei.c:354 vfs_mknod+0x325/0x360 fs/namei.c:4003 do_mknodat+0x386/0x500 fs/namei.c:-1 __do_sys_mknodat fs/namei.c:4081 [inline] __se_sys_mknodat fs/namei.c:4078 [inline] __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4078 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804 ocfs2_reserve_new_metadata_blocks+0x416/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_init_xattr_set_ctxt+0x30b/0x710 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xc75/0x13a0 fs/ocfs2/xattr.c:3634 ocfs2_set_acl+0x4d4/0x580 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x1b2/0x2b0 fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:956 [inline] vfs_set_acl+0x80f/0xa70 fs/posix_acl.c:1135 do_set_acl+0xf5/0x180 fs/posix_acl.c:1280 do_setxattr fs/xattr.c:627 [inline] path_setxattr+0x362/0x590 fs/xattr.c:659 __do_sys_setxattr fs/xattr.c:677 [inline] __se_sys_setxattr fs/xattr.c:673 [inline] __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 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]#6 --> &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]#6); *** DEADLOCK *** 3 locks held by syz.4.4340/16016: #0: ffff888024e4a418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff88805995df58 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805995df58 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: vfs_set_acl+0x368/0xa70 fs/posix_acl.c:1116 #2: ffff88805995dc78 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x495/0x13a0 fs/ocfs2/xattr.c:3583 stack backtrace: CPU: 1 PID: 16016 Comm: syz.4.4340 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804 ocfs2_reserve_new_metadata_blocks+0x416/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_init_xattr_set_ctxt+0x30b/0x710 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xc75/0x13a0 fs/ocfs2/xattr.c:3634 ocfs2_set_acl+0x4d4/0x580 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x1b2/0x2b0 fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:956 [inline] vfs_set_acl+0x80f/0xa70 fs/posix_acl.c:1135 do_set_acl+0xf5/0x180 fs/posix_acl.c:1280 do_setxattr fs/xattr.c:627 [inline] path_setxattr+0x362/0x590 fs/xattr.c:659 __do_sys_setxattr fs/xattr.c:677 [inline] __se_sys_setxattr fs/xattr.c:673 [inline] __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fa3afb9de99 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:00007fa3b0ad2028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007fa3afe25fa0 RCX: 00007fa3afb9de99 RDX: 0000200000000c40 RSI: 0000200000000080 RDI: 00002000000000c0 RBP: 00007fa3afc33eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000024 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa3afe26038 R14: 00007fa3afe25fa0 R15: 00007ffd745a9fc8