WARNING in truncate_setsize

Status: upstream: reported on 2026/09/29 20:16
Subsystems: ntfs3
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+0e70362e1726b5a7502e@syzkaller.appspotmail.com
First crash: 4d03h, last: 4d03h
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ID Workflow Result Correct Bug Created Started Finished Revision
4189d3d2 assessment-security DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ WARNING in truncate_setsize 2026/09/27 01:45 2026/09/27 01:45 2026/09/27 03:32 a3c7249d
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Title Replies (including bot) Last reply
[syzbot] [ntfs3?] WARNING in truncate_setsize 0 (1) 2026/09/29 20:16

Sample crash report:
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
ntfs3(loop0): failed to read volume at offset 0x46c00
------------[ cut here ]------------
ifs_is_fully_uptodate(folio, ifs) != folio_test_uptodate(folio)
WARNING: fs/iomap/buffered-io.c:295 at ifs_free+0x344/0x400 fs/iomap/buffered-io.c:294, CPU#0: syz.0.0/5321
Modules linked in:
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:ifs_free+0x344/0x400 fs/iomap/buffered-io.c:294
Code: 41 5f 5d e9 be 47 bc ff e8 e9 9b 56 ff 90 0f 0b 90 e9 d8 fe ff ff e8 db 9b 56 ff 90 0f 0b 90 e9 12 ff ff ff e8 cd 9b 56 ff 90 <0f> 0b 90 eb c7 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 0e fe ff ff
RSP: 0018:ffffc9000e557498 EFLAGS: 00010287
RAX: ffffffff82715143 RBX: 0000000000000008 RCX: 0000000000100000
RDX: ffffc90020802000 RSI: 0000000000000f7c RDI: 0000000000000f7d
RBP: 000000008271cf01 R08: ffffea00004e4607 R09: 1ffffd400009c8c0
R10: dffffc0000000000 R11: fffff9400009c8c1 R12: ffff888036fe1cc4
R13: ffff888036fe1c80 R14: ffffea00004e4600 R15: 0000000000000000
FS:  00007f2c7aed96c0(0000) GS:ffff88808c2bf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c7a1d58e0 CR3: 0000000012a58000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 folio_invalidate mm/truncate.c:140 [inline]
 truncate_cleanup_folio+0xcb/0x190 mm/truncate.c:160
 truncate_inode_pages_range+0x2c1/0xd80 mm/truncate.c:404
 truncate_inode_pages mm/truncate.c:485 [inline]
 truncate_pagecache mm/truncate.c:798 [inline]
 truncate_setsize+0xcf/0xf0 mm/truncate.c:823
 ntfs_setattr+0x267/0x590 fs/ntfs3/file.c:739
 notify_change+0xbba/0xea0 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 handle_truncate fs/namei.c:4300 [inline]
 do_open fs/namei.c:4841 [inline]
 path_openat+0x15b5/0x1d60 fs/namei.c:5000
 do_file_open+0x23e/0x4a0 fs/namei.c:5029
 do_sys_openat2+0x115/0x200 fs/open.c:1417
 do_sys_open fs/open.c:1423 [inline]
 __do_sys_openat fs/open.c:1439 [inline]
 __se_sys_openat fs/open.c:1434 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1434
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c79f9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c7aed8fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2c7a226090 RCX: 00007f2c79f9e159
RDX: 0000000000109342 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f2c7a03506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c7a226128 R14: 00007f2c7a226090 R15: 00007ffe6ba73cd8
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/25 20:14 upstream 165768bb7026 f281d9d2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in truncate_setsize
* Struck through repros no longer work on HEAD.