WARNING in ext4_dirty

Date	Name	Commit	Repro	Result
2025/09/22	upstream (ToT)	07e27ad16399	syz	[report] WARNING in ext4_dirty_folio

Date

Name

Commit

Repro

Result

2025/09/22

upstream (ToT)

07e27ad16399

syz

[report] WARNING in ext4_dirty_folio

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in ext4_dirty_folio mm	-1	C	error		7429	9d03h	1309d	0/29	upstream: reported C repro on 2022/03/26 15:24
linux-6.1	WARNING in ext4_dirty_folio origin:upstream missing-backport	-1	C		done	23	58d	840d	0/3	upstream: reported C repro on 2023/07/08 13:03

------------[ cut here ]------------ WARNING: CPU: 0 PID: 11379 at fs/ext4/inode.c:3583 ext4_dirty_folio+0x159/0x310 fs/ext4/inode.c:3583 Modules linked in: CPU: 0 PID: 11379 Comm: syz.9.134 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:ext4_dirty_folio+0x159/0x310 fs/ext4/inode.c:3583 Code: 49 83 3f 00 74 1f e8 56 91 53 ff 48 8b 3c 24 48 89 de 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8c 85 c9 ff e8 37 91 53 ff <0f> 0b eb dd e8 2e 91 53 ff 0f 0b eb af e8 25 91 53 ff 48 89 df 48 RSP: 0018:ffffc90004ce7998 EFLAGS: 00010293 RAX: ffffffff82320669 RBX: ffffea0001b566c0 RCX: ffff88807bb00000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 1ffffd400036acd8 R08: ffffea0001b566c7 R09: 1ffffd400036acd8 R10: dffffc0000000000 R11: fffff9400036acd9 R12: dffffc0000000000 R13: 1ffffd400036acd9 R14: 0000000000000001 R15: ffffea0001b566e8 FS: 00007ff0f49676c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002d126000 CR4: 00000000003506f0 Call Trace: <TASK> set_page_dirty_lock+0xfc/0x2c0 mm/page-writeback.c:2825 fuse_copy_finish+0x104/0x200 fs/fuse/dev.c:678 fuse_dev_do_read+0xc44/0x11a0 fs/fuse/dev.c:1302 fuse_dev_read+0x14d/0x1d0 fs/fuse/dev.c:1367 call_read_iter include/linux/fs.h:2012 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x431/0x920 fs/read_write.c:470 ksys_read+0x147/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff0f3b8ec29 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:00007ff0f4967038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ff0f3dd6180 RCX: 00007ff0f3b8ec29 RDX: 0000000000002020 RSI: 00002000000093c0 RDI: 0000000000000007 RBP: 00007ff0f3c11e41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff0f3dd6218 R14: 00007ff0f3dd6180 R15: 00007ffdce3a8648 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/09/21 20:59	linux-6.6.y	af1544b5d072	67c37560	.config	console log	report	syz / log			[disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci2-linux-6-6-kasan	WARNING in ext4_dirty_folio

Crashes (1):

Assets (help?)