loop0: detected capacity change from 512 to 0 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none. ====================================================== WARNING: possible circular locking dependency detected 5.11.0-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/5889 is trying to acquire lock: ffff88802cb2dac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_get+0x11d/0x920 fs/ext4/xattr.c:650 but task is already holding lock: ffff88802cb2de88 (&ea_inode->i_rwsem#10/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] ffff88802cb2de88 (&ea_inode->i_rwsem#10/1){+.+.}-{3:3}, at: chown_common+0x250/0x480 fs/open.c:671 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ea_inode->i_rwsem#10/1){+.+.}-{3:3}: down_write+0x8d/0x150 kernel/locking/rwsem.c:1406 inode_lock include/linux/fs.h:773 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1441 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1521 [inline] ext4_xattr_set_entry+0x2643/0x36d0 fs/ext4/xattr.c:1649 ext4_xattr_ibody_set+0x60/0x260 fs/ext4/xattr.c:2224 ext4_xattr_set_handle+0x6da/0x1070 fs/ext4/xattr.c:2380 ext4_xattr_set+0x11d/0x2c0 fs/ext4/xattr.c:2493 __vfs_setxattr+0xcf/0x120 fs/xattr.c:177 __vfs_setxattr_noperm+0xe6/0x470 fs/xattr.c:208 vfs_setxattr+0x10c/0x2c0 fs/xattr.c:291 setxattr+0x14e/0x250 fs/xattr.c:553 path_setxattr+0x115/0x130 fs/xattr.c:572 __do_sys_setxattr fs/xattr.c:587 [inline] __se_sys_setxattr fs/xattr.c:583 [inline] __x64_sys_setxattr+0xbb/0x150 fs/xattr.c:583 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> #0 (&ei->xattr_sem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:2868 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x2b3b/0x57d0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 down_read+0x95/0x440 kernel/locking/rwsem.c:1353 ext4_xattr_get+0x11d/0x920 fs/ext4/xattr.c:650 __vfs_getxattr+0xb9/0x110 fs/xattr.c:386 cap_inode_need_killpriv+0x37/0x50 security/commoncap.c:300 security_inode_need_killpriv+0x34/0x70 security/security.c:1353 notify_change+0x4b4/0xd90 fs/attr.c:273 chown_common+0x3b5/0x480 fs/open.c:674 do_fchownat+0xcf/0x140 fs/open.c:704 __do_sys_fchownat fs/open.c:719 [inline] __se_sys_fchownat fs/open.c:716 [inline] __x64_sys_fchownat+0xb5/0x150 fs/open.c:716 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ea_inode->i_rwsem#10/1); lock(&ei->xattr_sem); lock(&ea_inode->i_rwsem#10/1); lock(&ei->xattr_sem); *** DEADLOCK *** 2 locks held by syz-executor.0/5889: #0: ffff888027440460 (sb_writers#5){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:701 #1: ffff88802cb2de88 (&ea_inode->i_rwsem#10/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff88802cb2de88 (&ea_inode->i_rwsem#10/1){+.+.}-{3:3}, at: chown_common+0x250/0x480 fs/open.c:671 stack backtrace: CPU: 1 PID: 5889 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x9a/0xcc lib/dump_stack.c:120 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2117 check_prev_add kernel/locking/lockdep.c:2868 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x2b3b/0x57d0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 down_read+0x95/0x440 kernel/locking/rwsem.c:1353 ext4_xattr_get+0x11d/0x920 fs/ext4/xattr.c:650 __vfs_getxattr+0xb9/0x110 fs/xattr.c:386 cap_inode_need_killpriv+0x37/0x50 security/commoncap.c:300 security_inode_need_killpriv+0x34/0x70 security/security.c:1353 notify_change+0x4b4/0xd90 fs/attr.c:273 chown_common+0x3b5/0x480 fs/open.c:674 do_fchownat+0xcf/0x140 fs/open.c:704 __do_sys_fchownat fs/open.c:719 [inline] __se_sys_fchownat fs/open.c:716 [inline] __x64_sys_fchownat+0xb5/0x150 fs/open.c:716 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f315a569209 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3159cde168 EFLAGS: 00000246 ORIG_RAX: 0000000000000104 RAX: ffffffffffffffda RBX: 00007f315a67bf60 RCX: 00007f315a569209 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 00007f315a5c3161 R08: 0000000000001000 R09: 0000000000000000 R10: 000000000000ee01 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffde8780c9f R14: 00007f3159cde300 R15: 0000000000022000