====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.0/5350 is trying to acquire lock: ffff888047a497a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] ffff888047a497a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xba7/0x13e0 fs/ocfs2/xattr.c:3653 but task is already holding lock: ffff888047a3a2e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0 fs/ocfs2/xattr.c:3614 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568 ocfs2_init_acl+0x2fd/0x7e0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1679/0x2260 fs/ocfs2/namei.c:414 ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:677 vfs_create+0x2d1/0x460 fs/namei.c:4204 filename_mknodat+0x3e8/0x660 fs/namei.c:5170 __do_sys_mknod fs/namei.c:5207 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5204 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (jbd2_handle#2){++++}-{0:0}: jbd2_journal_lock_updates+0xab/0x370 fs/jbd2/transaction.c:862 __ocfs2_flush_truncate_log+0x2b9/0x1240 fs/ocfs2/alloc.c:6046 ocfs2_remove_btree_range+0x75b/0x1610 fs/ocfs2/alloc.c:5762 ocfs2_remove_inode_range+0x100b/0x2770 fs/ocfs2/file.c:1914 ocfs2_reflink_remap_extent fs/ocfs2/refcounttree.c:4534 [inline] ocfs2_reflink_remap_blocks+0xab6/0x1a30 fs/ocfs2/refcounttree.c:4681 ocfs2_remap_file_range+0x451/0x6f0 fs/ocfs2/file.c:2747 vfs_copy_file_range+0xd80/0x1370 fs/read_write.c:1600 __do_sys_copy_file_range fs/read_write.c:1683 [inline] __se_sys_copy_file_range+0x2fb/0x480 fs/read_write.c:1650 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1625 inode_lock include/linux/fs.h:1029 [inline] ocfs2_xattr_set+0xba7/0x13e0 fs/ocfs2/xattr.c:3653 ocfs2_set_acl+0x701/0x7b0 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x1b1/0x2b0 fs/ocfs2/acl.c:287 set_posix_acl fs/posix_acl.c:955 [inline] vfs_set_acl+0x8ff/0xc00 fs/posix_acl.c:1134 do_set_acl+0xf5/0x190 fs/posix_acl.c:1279 do_setxattr fs/xattr.c:651 [inline] filename_setxattr+0x305/0x630 fs/xattr.c:682 path_setxattrat+0x3eb/0x440 fs/xattr.c:726 __do_sys_lsetxattr fs/xattr.c:767 [inline] __se_sys_lsetxattr fs/xattr.c:763 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:763 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 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[TRUNCATE_LOG_SYSTEM_INODE] --> jbd2_handle#2 --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle#2); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.0.0/5350: #0: ffff888033fa8410 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff888047a3a5a0 (&type->i_mutex_dir_key#9){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #1: ffff888047a3a5a0 (&type->i_mutex_dir_key#9){+.+.}-{4:4}, at: vfs_set_acl+0x3af/0xc00 fs/posix_acl.c:1115 #2: ffff888047a3a2e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0 fs/ocfs2/xattr.c:3614 stack backtrace: CPU: 0 UID: 0 PID: 5350 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1625 inode_lock include/linux/fs.h:1029 [inline] ocfs2_xattr_set+0xba7/0x13e0 fs/ocfs2/xattr.c:3653 ocfs2_set_acl+0x701/0x7b0 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x1b1/0x2b0 fs/ocfs2/acl.c:287 set_posix_acl fs/posix_acl.c:955 [inline] vfs_set_acl+0x8ff/0xc00 fs/posix_acl.c:1134 do_set_acl+0xf5/0x190 fs/posix_acl.c:1279 do_setxattr fs/xattr.c:651 [inline] filename_setxattr+0x305/0x630 fs/xattr.c:682 path_setxattrat+0x3eb/0x440 fs/xattr.c:726 __do_sys_lsetxattr fs/xattr.c:767 [inline] __se_sys_lsetxattr fs/xattr.c:763 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:763 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0b5839ce59 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:00007f0b5926dfe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f0b58616360 RCX: 00007f0b5839ce59 RDX: 00002000000000c0 RSI: 0000200000000440 RDI: 0000200000000400 RBP: 00007f0b58432d6f R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0b586163f8 R14: 00007f0b58616360 R15: 00007ffed3bb0b08