loop7: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.7.1208/11287 is trying to acquire lock: ffff88807ba4a270 (&wnd->rw_lock){++++}-{4:4}, at: mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2464 but task is already holding lock: ffff88807e7351c8 (&ni->file.run_lock#2){++++}-{4:4}, at: attr_collapse_range+0x38c/0x1730 fs/ntfs3/attrib.c:1904 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+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537 run_unpack_ex+0x7e5/0xba0 fs/ntfs3/run.c:1124 ntfs_read_mft fs/ntfs3/inode.c:401 [inline] ntfs_iget5+0x232b/0x37e0 fs/ntfs3/inode.c:541 dir_search_u+0x1df/0x2c0 fs/ntfs3/dir.c:264 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85 __lookup_slow+0x297/0x3d0 fs/namei.c:1816 lookup_slow+0x53/0x70 fs/namei.c:1833 walk_component+0x2d2/0x400 fs/namei.c:2151 lookup_last fs/namei.c:2652 [inline] path_lookupat+0x163/0x430 fs/namei.c:2676 filename_lookup+0x212/0x570 fs/namei.c:2705 user_path_at+0x3a/0x60 fs/namei.c:3215 do_sys_truncate+0xa3/0x190 fs/open.c:139 __do_sys_truncate fs/open.c:153 [inline] __se_sys_truncate fs/open.c:151 [inline] __x64_sys_truncate+0x5b/0x70 fs/open.c:151 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1706 mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2464 run_deallocate_ex+0x187/0x2f0 fs/ntfs3/attrib.c:122 attr_collapse_range+0xc36/0x1730 fs/ntfs3/attrib.c:1972 ntfs_fallocate+0x7d6/0x10b0 fs/ntfs3/file.c:645 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/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 *** 5 locks held by syz.7.1208/11287: #0: ffff88807ba48420 (sb_writers#21){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3111 [inline] #0: ffff88807ba48420 (sb_writers#21){.+.+}-{0:0}, at: vfs_fallocate+0x5f0/0x7e0 fs/open.c:341 #1: ffff88807e7353b0 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff88807e7353b0 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: ntfs_fallocate+0x2ee/0x10b0 fs/ntfs3/file.c:560 #2: ffff88807e735550 (mapping.invalidate_lock#17){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1035 [inline] #2: ffff88807e735550 (mapping.invalidate_lock#17){++++}-{4:4}, at: ntfs_fallocate+0x3b8/0x10b0 fs/ntfs3/file.c:574 #3: ffff88807e735118 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] #3: ffff88807e735118 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_fallocate+0x7c4/0x10b0 fs/ntfs3/file.c:644 #4: ffff88807e7351c8 (&ni->file.run_lock#2){++++}-{4:4}, at: attr_collapse_range+0x38c/0x1730 fs/ntfs3/attrib.c:1904 stack backtrace: CPU: 0 UID: 0 PID: 11287 Comm: syz.7.1208 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write_nested+0x9d/0x200 kernel/locking/rwsem.c:1706 mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2464 run_deallocate_ex+0x187/0x2f0 fs/ntfs3/attrib.c:122 attr_collapse_range+0xc36/0x1730 fs/ntfs3/attrib.c:1972 ntfs_fallocate+0x7d6/0x10b0 fs/ntfs3/file.c:645 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:369 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5da478efc9 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:00007f5da5595038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f5da49e5fa0 RCX: 00007f5da478efc9 RDX: 0000000000002000 RSI: 0000000000000008 RDI: 0000000000000005 RBP: 00007f5da4811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5da49e6038 R14: 00007f5da49e5fa0 R15: 00007ffc7bac2778