WARNING in ext4_iomap

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	WARNING in ext4_iomap_begin (2) origin:upstream	-1	C		done	10	250d	335d	3/3	fixed on 2025/07/16 19:57
linux-6.6	WARNING in ext4_iomap_begin origin:upstream	-1	C		error	6	52d	178d	0/2	upstream: reported C repro on 2025/08/27 01:08
linux-6.1	WARNING in ext4_iomap_begin	-1				1	941d	941d	0/3	auto-obsoleted due to no activity on 2023/11/02 21:33
upstream	WARNING in ext4_iomap_begin ext4	-1	C	inconclusive	error	16	1290d	1317d	0/29	auto-obsoleted due to no activity on 2023/04/04 00:54
linux-6.1	WARNING in ext4_iomap_begin (3)	-1				2	175d	180d	0/3	auto-obsoleted due to no activity on 2025/12/07 16:01
upstream	WARNING in ext4_iomap_begin (2) ext4	-1	C	done		7	865d	980d	25/29	fixed on 2023/12/21 03:45
linux-5.15	WARNING in ext4_iomap_begin origin:upstream	-1	C		done	8	256d	290d	3/3	fixed on 2025/07/14 10:31
upstream	WARNING in ext4_iomap_begin (3) ext4	-1	C	inconclusive		87	11d	477d	0/29	upstream: reported C repro on 2024/10/31 12:34
linux-5.15	WARNING in ext4_iomap_begin (2) origin:upstream	-1	C		error	9	28d	194d	0/3	upstream: reported C repro on 2025/08/11 00:02

------------[ cut here ]------------ WARNING: CPU: 0 PID: 7583 at fs/ext4/inode.c:3466 ext4_iomap_begin+0x9c1/0xb10 fs/ext4/inode.c:3466 Modules linked in: CPU: 0 PID: 7583 Comm: syz.6.722 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:ext4_iomap_begin+0x9c1/0xb10 fs/ext4/inode.c:3466 Code: 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 26 1d 5d ff 4c 8b 64 24 28 48 8d 9c 24 d0 00 00 00 e9 6b ff ff ff e8 0f 1d 5d ff <0f> 0b 41 be de ff ff ff e9 56 f7 ff ff 89 d9 80 e1 07 38 c1 0f 8c RSP: 0018:ffffc90003857620 EFLAGS: 00010287 RAX: ffffffff822556a1 RBX: ffff888068785dc2 RCX: 0000000000080000 RDX: ffffc9000f653000 RSI: 0000000000007541 RDI: 0000000000007542 RBP: ffffc90003857790 R08: ffff888068785a9f R09: 1ffff1100d0f0b53 R10: dffffc0000000000 R11: ffffed100d0f0b54 R12: 00000000000000d4 R13: 1ffff1100d0f0bb8 R14: 000000000000000b R15: 0000000000000000 FS: 00007f81abc776c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe48fdf020 CR3: 000000005bae1000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> iomap_iter+0x6c6/0x1040 fs/iomap/iter.c:91 __iomap_dio_rw+0xd52/0x1e30 fs/iomap/direct-io.c:593 iomap_dio_rw+0x41/0xa0 fs/iomap/direct-io.c:682 ext4_dio_write_iter fs/ext4/file.c:554 [inline] ext4_file_write_iter+0x12b7/0x1710 fs/ext4/file.c:674 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x4b1/0xa30 fs/read_write.c:584 ksys_write+0x14c/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f81aad9bf79 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:00007f81abc77028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f81ab016090 RCX: 00007f81aad9bf79 RDX: 0000000000032600 RSI: 0000200000000140 RDI: 0000000000000004 RBP: 00007f81aae327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f81ab016128 R14: 00007f81ab016090 R15: 00007ffde27af0b8 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/02/12 23:16	linux-6.1.y	8ce36b2849ef	504cb1bf	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan	WARNING in ext4_iomap_begin

Crashes (1):

Assets (help?)