====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.15/5949 is trying to acquire lock: ffff88805c9d3f60 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xb7/0x340 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff88805c9d3ff8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa5/0x340 fs/ocfs2/refcounttree.c:931 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&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 ocfs2_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x296/0x440 fs/namei.c:4121 do_mkdirat+0x1dc/0x450 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 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 (&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_local_alloc_slide_window fs/ocfs2/localalloc.c:1258 [inline] ocfs2_reserve_local_alloc_bits+0xb44/0x2600 fs/ocfs2/localalloc.c:668 ocfs2_reserve_clusters_with_limit+0x1ba/0xc20 fs/ocfs2/suballoc.c:1162 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2856 [inline] ocfs2_extend_dir+0x74f/0x48b0 fs/ocfs2/dir.c:3201 ocfs2_prepare_dir_for_insert+0x315b/0x56b0 fs/ocfs2/dir.c:4322 ocfs2_mknod+0x81b/0x2300 fs/ocfs2/namei.c:294 ocfs2_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x296/0x440 fs/namei.c:4121 do_mkdirat+0x1dc/0x450 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 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 (sb_internal#3){.+.+}-{0:0}: __lock_release kernel/locking/lockdep.c:5468 [inline] lock_release+0x332/0x8c0 kernel/locking/lockdep.c:5774 up_write+0x2d/0x410 kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:809 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x97/0x1a0 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x4375/0x43f0 fs/ocfs2/aops.c:1825 ocfs2_dio_wr_get_block+0xbba/0x1820 fs/ocfs2/aops.c:2239 get_more_blocks fs/direct-io.c:647 [inline] do_direct_IO fs/direct-io.c:935 [inline] __blockdev_direct_IO+0x1775/0x3500 fs/direct-io.c:1248 ocfs2_direct_IO+0x235/0x2a0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3956 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4112 ocfs2_file_write_iter+0x167a/0x1e80 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x738/0xc30 fs/read_write.c:860 iter_file_splice_write+0x6a3/0xcb0 fs/splice.c:736 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0xe8/0x130 fs/splice.c:1142 splice_direct_to_actor+0x304/0x8c0 fs/splice.c:1088 do_splice_direct+0x1d5/0x2f0 fs/splice.c:1194 do_sendfile+0x5f2/0xef0 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0x145/0x1a0 fs/read_write.c:1308 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 -> #0 (&oi->ip_alloc_sem){++++}-{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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb7/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xde5/0x1440 fs/ocfs2/file.c:521 ocfs2_setattr+0x158d/0x1bc0 fs/ocfs2/file.c:1211 notify_change+0xb0d/0xe10 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x2a32/0x3230 fs/namei.c:3797 do_filp_open+0x1f5/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 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: &oi->ip_alloc_sem --> &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(&oi->ip_alloc_sem); *** DEADLOCK *** 3 locks held by syz.1.15/5949: #0: ffff88807b6fc418 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff88805c9d42d8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805c9d42d8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x19c/0x240 fs/open.c:64 #2: ffff88805c9d3ff8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa5/0x340 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 1 PID: 5949 Comm: syz.1.15 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb7/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xde5/0x1440 fs/ocfs2/file.c:521 ocfs2_setattr+0x158d/0x1bc0 fs/ocfs2/file.c:1211 notify_change+0xb0d/0xe10 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x2a32/0x3230 fs/namei.c:3797 do_filp_open+0x1f5/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 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: 0033:0x7f424639aeb9 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:00007f424718b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f4246616090 RCX: 00007f424639aeb9 RDX: 000000000000275a RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007f4246408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4246616128 R14: 00007f4246616090 R15: 00007fffc5bf4f68