WARNING in wnd_add_free

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[syzbot] [ntfs3?] WARNING in wnd_add_free_ext (4)	0 (2)	2026/01/27 18:13

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[syzbot] [ntfs3?] WARNING in wnd_add_free_ext (4)

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2026/01/27 18:13

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in wnd_add_free_ext (3) ntfs3	-1	C	done		19	296d	532d	28/29	fixed on 2025/05/06 15:33
linux-6.1	WARNING in wnd_add_free_ext origin:upstream missing-backport	-1	C		inconclusive	15	468d	898d	0/3	upstream: reported C repro on 2023/08/15 03:08
linux-5.15	WARNING in wnd_add_free_ext missing-backport origin:upstream	-1	C		error	2	30d	889d	0/3	upstream: reported C repro on 2023/08/23 21:49
upstream	WARNING in wnd_add_free_ext (2) ntfs3	-1	C	done	done	16	833d	938d	0/29	auto-obsoleted due to no activity on 2024/01/24 12:23
upstream	WARNING in wnd_add_free_ext ntfs3	-1				2	1104d	1128d	0/29	auto-obsoleted due to no activity on 2023/05/20 17:24

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fca63c16128 R14: 00007fca63c16090 R15: 00007ffedc73d3d8 </TASK> ------------[ cut here ]------------ 1 WARNING: fs/ntfs3/bitmap.c:217 at rb_insert_start fs/ntfs3/bitmap.c:217 [inline], CPU#0: syz.0.18/5481 WARNING: fs/ntfs3/bitmap.c:217 at wnd_add_free_ext+0xb92/0xe60 fs/ntfs3/bitmap.c:352, CPU#0: syz.0.18/5481 Modules linked in: CPU: 0 UID: 0 PID: 5481 Comm: syz.0.18 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:rb_insert_start fs/ntfs3/bitmap.c:217 [inline] RIP: 0010:wnd_add_free_ext+0xb92/0xe60 fs/ntfs3/bitmap.c:352 Code: 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 44 8a 14 ff 4d 89 2f 4c 89 ef 48 89 de e8 b6 5e 7a 08 eb 0d e8 3f af aa fe 90 <0f> 0b 90 4c 8b 24 24 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 RSP: 0018:ffffc90003f677c8 EFLAGS: 00010293 RAX: ffffffff8319d7b1 RBX: ffff88804437a2e0 RCX: ffff888000be8000 RDX: 0000000000000000 RSI: 0000000000000019 RDI: 0000000000000019 RBP: 0000000000000019 R08: ffff888047706c2b R09: 1ffff11008ee0d85 R10: dffffc0000000000 R11: ffffed1008ee0d86 R12: dffffc0000000000 R13: ffff88804a4c96c0 R14: ffff88804a5346c0 R15: 0000000000000019 FS: 00007fca648f46c0(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca648f3ff8 CR3: 0000000052ad1000 CR4: 0000000000352ef0 Call Trace: <TASK> wnd_set_free+0x4bf/0x5c0 fs/ntfs3/bitmap.c:743 mark_as_free_ex+0x1c8/0x390 fs/ntfs3/fsntfs.c:2489 run_unpack+0x7aa/0xc90 fs/ntfs3/run.c:1037 run_unpack_ex+0xd2/0xb90 fs/ntfs3/run.c:1078 ni_delete_all+0x363/0x8a0 fs/ntfs3/frecord.c:1562 ni_clear+0x315/0x530 fs/ntfs3/frecord.c:108 evict+0x61e/0xb10 fs/inode.c:837 do_unlinkat+0x354/0x590 fs/namei.c:5452 __do_sys_unlink fs/namei.c:5483 [inline] __se_sys_unlink fs/namei.c:5481 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:5481 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fca6399aeb9 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:00007fca648f4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007fca63c16090 RCX: 00007fca6399aeb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007fca648f4090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fca63c16128 R14: 00007fca63c16090 R15: 00007ffedc73d3d8 </TASK>

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Assets (help?)	Manager	Title
2026/01/27 18:12	upstream	fcb70a56f4d8	43e1df1d	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (corrupt fs)]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2026/01/27 17:11	upstream	fcb70a56f4d8	43e1df1d	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/11/17 00:31	upstream	7254a2b52279	f7988ea4	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/09/09 01:40	upstream	f777d1112ee5	d291dd2d	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/08/30 03:11	upstream	fb679c832b64	807a3b61	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/08/14 04:05	upstream	dfc0f6373094	22ec1469	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/07/22 04:35	upstream	89be9a83ccf1	1555463b	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/06/21 16:09	upstream	3f75bfff44be	d6cdfb8a	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/06/18 04:20	upstream	4663747812d1	e77fae15	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext
2025/06/15 08:10	upstream	8c6bc74c7f89	5f4b362d	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	WARNING in wnd_add_free_ext