loop1: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.2154/11760 is trying to acquire lock: ffff888022bd0270 (&wnd->rw_lock){++++}-{4:4}, at: mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2464 but task is already holding lock: ffff8880546c2618 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:483 [inline] ffff8880546c2618 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_setattr+0x579/0xda0 fs/ntfs3/file.c:806 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->file.run_lock#2){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1537 run_unpack_ex+0x671/0x740 fs/ntfs3/run.c:1124 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0xd97/0x3a90 fs/ntfs3/inode.c:541 ntfs_dir_emit fs/ntfs3/dir.c:337 [inline] ntfs_read_hdr+0x8dd/0xaf0 fs/ntfs3/dir.c:385 ntfs_readdir+0x6cd/0x10b0 fs/ntfs3/dir.c:496 iterate_dir+0x296/0xaf0 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64 fs/readdir.c:396 [inline] __x64_sys_getdents64+0x13c/0x2c0 fs/readdir.c:396 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&wnd->rw_lock){++++}-{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+0x126f/0x1c90 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write_nested+0x96/0x210 kernel/locking/rwsem.c:1706 mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2464 run_deallocate_ex+0x1f4/0x310 fs/ntfs3/attrib.c:122 attr_set_size+0xc5f/0x2c50 fs/ntfs3/attrib.c:753 ntfs_truncate fs/ntfs3/file.c:484 [inline] ntfs_setattr+0x643/0xda0 fs/ntfs3/file.c:806 notify_change+0x6d2/0x12a0 fs/attr.c:546 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0xcc/0x120 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 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.1.2154/11760: #0: ffff888022bd2420 (sb_writers#13){.+.+}-{0:0}, at: do_open fs/namei.c:3968 [inline] #0: ffff888022bd2420 (sb_writers#13){.+.+}-{0:0}, at: path_openat+0x22f4/0x2cb0 fs/namei.c:4134 #1: ffff8880546c2800 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:985 [inline] #1: ffff8880546c2800 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: do_truncate+0x146/0x230 fs/open.c:63 #2: ffff8880546c2568 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #2: ffff8880546c2568 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:481 [inline] #2: ffff8880546c2568 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_setattr+0x563/0xda0 fs/ntfs3/file.c:806 #3: ffff8880546c2618 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_truncate fs/ntfs3/file.c:483 [inline] #3: ffff8880546c2618 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_setattr+0x579/0xda0 fs/ntfs3/file.c:806 stack backtrace: CPU: 1 UID: 0 PID: 11760 Comm: syz.1.2154 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2043 check_noncircular+0x14c/0x170 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+0x126f/0x1c90 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write_nested+0x96/0x210 kernel/locking/rwsem.c:1706 mark_as_free_ex+0x4d/0x430 fs/ntfs3/fsntfs.c:2464 run_deallocate_ex+0x1f4/0x310 fs/ntfs3/attrib.c:122 attr_set_size+0xc5f/0x2c50 fs/ntfs3/attrib.c:753 ntfs_truncate fs/ntfs3/file.c:484 [inline] ntfs_setattr+0x643/0xda0 fs/ntfs3/file.c:806 notify_change+0x6d2/0x12a0 fs/attr.c:546 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0xcc/0x120 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f184658efc9 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:00007f1847451038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f18467e5fa0 RCX: 00007f184658efc9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000002c0 RBP: 00007f1846611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f18467e6038 R14: 00007f18467e5fa0 R15: 00007ffffd9c4218