WARNING in attr_data_get_block

Title	Replies (including bot)	Last reply
[syzbot] Monthly ntfs3 report (Mar 2026)	0 (1)	2026/03/01 06:22
[syzbot] [ntfs3?] WARNING in attr_data_get_block_locked	0 (1)	2026/02/23 11:56

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1
WARNING: fs/ntfs3/attrib.c:1222 at attr_data_get_block_locked+0x174a/0x22a0 fs/ntfs3/attrib.c:1222, CPU#0: syz.0.17/5462
Modules linked in:
CPU: 0 UID: 0 PID: 5462 Comm: syz.0.17 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:attr_data_get_block_locked+0x174a/0x22a0 fs/ntfs3/attrib.c:1222
Code: 89 ee 49 89 d6 e8 d6 19 a6 fe 4d 89 f2 44 89 ac 24 bc 00 00 00 45 29 ea 73 1e e8 01 18 a6 fe e9 47 f9 ff ff e8 f7 17 a6 fe 90 <0f> 0b 90 41 bf ea ff ff ff e9 d6 fa ff ff 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc900049079c0 EFLAGS: 00010293
RAX: ffffffff831f83a9 RBX: 00000000ffffffff RCX: ffff888000ea0000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: ffffc90004907be8 R08: 0000000000000000 R09: 1ffff11002487041
R10: dffffc0000000000 R11: ffffed1002487042 R12: 0000000000000002
R13: dffffc0000000000 R14: 0000000000002000 R15: 0000000000000007
FS:  000055558ba85500(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd19d7909c0 CR3: 0000000012819000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 attr_data_get_block+0x250/0x310 fs/ntfs3/attrib.c:982
 ntfs_fallocate+0xfac/0x1220 fs/ntfs3/file.c:677
 vfs_fallocate+0x669/0x7e0 fs/open.c:340
 ksys_fallocate fs/open.c:364 [inline]
 __do_sys_fallocate fs/open.c:369 [inline]
 __se_sys_fallocate fs/open.c:367 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e3d39c629
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:00007fffbfb65448 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f1e3d615fa0 RCX: 00007f1e3d39c629
RDX: 0000000000007351 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f1e3d432b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1e3d615fac R14: 00007f1e3d615fa0 R15: 00007f1e3d615fa0
 </TASK>

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Assets (help?)	Manager	Title
2026/02/19 14:24	upstream	956b9cbd7f15	746545b8	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro]	ci-snapshot-upstream-root	WARNING in attr_data_get_block_locked
2026/02/22 03:02	upstream	d79526b89571	6e7b5511	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in attr_data_get_block_locked
2026/02/21 09:35	upstream	a95f71ad3e2e	6e7b5511	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in attr_data_get_block_locked
2026/02/20 02:36	upstream	2b7a25df823d	73a252ac	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in attr_data_get_block_locked
2026/02/19 11:48	upstream	956b9cbd7f15	746545b8	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in attr_data_get_block_locked