ocfs2: Mounting device (7,5) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.5.7879/1822 is trying to acquire lock: ffff888068d4a608 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_setattr+0xc72/0x1bc0 fs/ocfs2/file.c:1262 but task is already holding lock: ffff88805dab14a0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_setattr+0xc63/0x1bc0 fs/ocfs2/file.c:1261 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: down_write+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb7/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x61b/0x13e0 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x4e1/0x590 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+0x803/0xa60 fs/posix_acl.c:1135 do_setxattr fs/xattr.c:627 [inline] path_setxattr+0x41d/0x5d0 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+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&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+0x140f/0x2300 fs/ocfs2/namei.c:410 vfs_mknod+0x32b/0x360 fs/namei.c:3999 do_mknodat+0x386/0x500 fs/namei.c:-1 __do_sys_mknodat fs/namei.c:4077 [inline] __se_sys_mknodat fs/namei.c:4074 [inline] __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&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_shutdown_local_alloc+0x1fc/0xaa0 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1e5/0x8a0 fs/ocfs2/super.c:1881 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259 task_work_run+0x1d4/0x260 kernel/task_work.c:245 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (sb_internal#4){.+.+}-{0:0}: 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 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_setattr+0xc72/0x1bc0 fs/ocfs2/file.c:1262 notify_change+0xb0d/0xe10 fs/attr.c:499 chmod_common+0x252/0x3f0 fs/open.c:643 do_fchmodat+0x10c/0x1e0 fs/open.c:691 __do_sys_fchmodat fs/open.c:710 [inline] __se_sys_fchmodat fs/open.c:707 [inline] __x64_sys_fchmodat+0x7d/0x90 fs/open.c:707 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: sb_internal#4 --> &oi->ip_xattr_sem --> &ocfs2_file_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); rlock(sb_internal#4); *** DEADLOCK *** 3 locks held by syz.5.7879/1822: #0: ffff888068d4a418 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff88805dab1818 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805dab1818 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: chmod_common+0x18e/0x3f0 fs/open.c:637 #2: ffff88805dab14a0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_setattr+0xc63/0x1bc0 fs/ocfs2/file.c:1261 stack backtrace: CPU: 1 PID: 1822 Comm: syz.5.7879 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 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_setattr+0xc72/0x1bc0 fs/ocfs2/file.c:1262 notify_change+0xb0d/0xe10 fs/attr.c:499 chmod_common+0x252/0x3f0 fs/open.c:643 do_fchmodat+0x10c/0x1e0 fs/open.c:691 __do_sys_fchmodat fs/open.c:710 [inline] __se_sys_fchmodat fs/open.c:707 [inline] __x64_sys_fchmodat+0x7d/0x90 fs/open.c:707 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f1ed119c819 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:00007f1ed2075028 EFLAGS: 00000246 ORIG_RAX: 000000000000010c RAX: ffffffffffffffda RBX: 00007f1ed1415fa0 RCX: 00007f1ed119c819 RDX: 00000000fffffffb RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007f1ed1232c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1ed1416038 R14: 00007f1ed1415fa0 R15: 00007ffd69dc3868