====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc5-next-20241104-syzkaller #0 Not tainted ------------------------------------------------------ syz.4.91/6158 is trying to acquire lock: ffff88814a81e270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0x100/0x690 fs/ntfs3/fsntfs.c:362 but task is already holding lock: ffff88807cb28908 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x13d/0x200 fs/ntfs3/inode.c:852 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 run_unpack_ex+0x55e/0x9e0 fs/ntfs3/run.c:1119 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x1f9a/0x37b0 fs/ntfs3/inode.c:537 dir_search_u+0x2fe/0x3a0 fs/ntfs3/dir.c:264 ntfs_lookup+0x106/0x1f0 fs/ntfs3/namei.c:85 lookup_open fs/namei.c:3614 [inline] open_last_lookups fs/namei.c:3735 [inline] path_openat+0x11a7/0x3590 fs/namei.c:3971 do_filp_open+0x235/0x490 fs/namei.c:4001 do_sys_openat2+0x13e/0x1d0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_openat fs/open.c:1450 [inline] __se_sys_openat fs/open.c:1445 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1445 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&wnd->rw_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write_nested+0xa2/0x220 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0x100/0x690 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1d6/0x990 fs/ntfs3/attrib.c:159 attr_set_size+0x2053/0x4300 fs/ntfs3/attrib.c:574 ntfs_set_size+0x161/0x200 fs/ntfs3/inode.c:854 ntfs_extend+0x1d1/0xad0 fs/ntfs3/file.c:409 ntfs_file_write_iter+0x403/0x7a0 fs/ntfs3/file.c:1262 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); lock(&ni->file.run_lock#2); lock(&wnd->rw_lock); *** DEADLOCK *** 4 locks held by syz.4.91/6158: #0: ffff888144b66420 (sb_writers#15){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2953 [inline] #0: ffff888144b66420 (sb_writers#15){.+.+}-{0:0}, at: vfs_writev+0x2d1/0xba0 fs/read_write.c:1062 #1: ffff88807cb28af0 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:837 [inline] #1: ffff88807cb28af0 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: ntfs_file_write_iter+0x291/0x7a0 fs/ntfs3/file.c:1240 #2: ffff88807cb28858 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1110 [inline] #2: ffff88807cb28858 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_set_size+0x12e/0x200 fs/ntfs3/inode.c:851 #3: ffff88807cb28908 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_set_size+0x13d/0x200 fs/ntfs3/inode.c:852 stack backtrace: CPU: 0 UID: 0 PID: 6158 Comm: syz.4.91 Not tainted 6.12.0-rc5-next-20241104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write_nested+0xa2/0x220 kernel/locking/rwsem.c:1693 ntfs_look_for_free_space+0x100/0x690 fs/ntfs3/fsntfs.c:362 attr_allocate_clusters+0x1d6/0x990 fs/ntfs3/attrib.c:159 attr_set_size+0x2053/0x4300 fs/ntfs3/attrib.c:574 ntfs_set_size+0x161/0x200 fs/ntfs3/inode.c:854 ntfs_extend+0x1d1/0xad0 fs/ntfs3/file.c:409 ntfs_file_write_iter+0x403/0x7a0 fs/ntfs3/file.c:1262 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f823d97e719 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:00007f823e74b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f823db35f80 RCX: 00007f823d97e719 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007f823d9f132e R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007c00 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f823db35f80 R15: 00007ffeae99ed28