====================================================== WARNING: possible circular locking dependency detected 6.1.117-syzkaller #0 Not tainted ------------------------------------------------------ syz.5.2485/12184 is trying to acquire lock: ffff8880718a2aa0 (&type->i_mutex_dir_key#15/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] ffff8880718a2aa0 (&type->i_mutex_dir_key#15/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:127 [inline] ffff8880718a2aa0 (&type->i_mutex_dir_key#15/3){+.+.}-{3:3}, at: open_xa_dir+0x132/0x610 fs/reiserfs/xattr.c:152 but task is already holding lock: ffff888077732090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5b/0xd0 fs/reiserfs/lock.c:78 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sbi->lock){+.+.}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747 reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27 reiserfs_mkdir+0x31d/0x8f0 fs/reiserfs/namei.c:831 xattr_mkdir fs/reiserfs/xattr.c:76 [inline] open_xa_root fs/reiserfs/xattr.c:136 [inline] open_xa_dir+0x2c9/0x610 fs/reiserfs/xattr.c:152 xattr_lookup+0x24/0x280 fs/reiserfs/xattr.c:395 reiserfs_xattr_set_handle+0xf8/0xdc0 fs/reiserfs/xattr.c:533 reiserfs_xattr_set+0x44e/0x570 fs/reiserfs/xattr.c:633 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x250/0x2b0 fs/xattr.c:617 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:655 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&type->i_mutex_dir_key#15/3){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_write_nested+0x39/0x60 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:793 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x132/0x610 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x1a4/0xb40 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x1b/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x20c/0x460 fs/reiserfs/inode.c:53 evict+0x529/0x930 fs/inode.c:701 reiserfs_create+0x5a7/0x6e0 fs/reiserfs/namei.c:688 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x12f1/0x2e60 fs/namei.c:3780 do_filp_open+0x230/0x480 fs/namei.c:3810 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#15/3); lock(&sbi->lock); lock(&type->i_mutex_dir_key#15/3); *** DEADLOCK *** 3 locks held by syz.5.2485/12184: #0: ffff8880522da460 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393 #1: ffff8880718a1d60 (&type->i_mutex_dir_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff8880718a1d60 (&type->i_mutex_dir_key#15){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3547 [inline] #1: ffff8880718a1d60 (&type->i_mutex_dir_key#15){+.+.}-{3:3}, at: path_openat+0x7b6/0x2e60 fs/namei.c:3780 #2: ffff888077732090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5b/0xd0 fs/reiserfs/lock.c:78 stack backtrace: CPU: 0 PID: 12184 Comm: syz.5.2485 Not tainted 6.1.117-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_write_nested+0x39/0x60 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:793 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x132/0x610 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x1a4/0xb40 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x1b/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x20c/0x460 fs/reiserfs/inode.c:53 evict+0x529/0x930 fs/inode.c:701 reiserfs_create+0x5a7/0x6e0 fs/reiserfs/namei.c:688 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x12f1/0x2e60 fs/namei.c:3780 do_filp_open+0x230/0x480 fs/namei.c:3810 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f2bcb77e719 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2bcc501038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f2bcb935f80 RCX: 00007f2bcb77e719 RDX: 0000000000000040 RSI: 000000002000c380 RDI: ffffffffffffff9c RBP: 00007f2bcb7f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2bcb935f80 R15: 00007ffc81b17858