Re: [moderation/CI] Re: ext4: test if inode's all dirty pages are submitted to disk

Pimyn Girgis
2026-03-02T10:05:26Z

#syz upstream

On Sun, Mar 1, 2026 at 3:44 AM syzbot ci
<syzbot+cic23c5bac8a4912b2@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v2] ext4: test if inode's all dirty pages are submitted to disk
> https://lore.kernel.org/all/20260228025650.2664098-1-yebin@huaweicloud.com
> * [PATCH v2] ext4: test if inode's all dirty pages are submitted to disk
>
> and found the following issue:
> WARNING in ext4_evict_inode
>
> Full report is available here:
> https://ci.syzbot.org/series/b58ccb85-a946-44ae-9d57-c02bee2a43ba
>
> ***
>
> WARNING in ext4_evict_inode
>
> tree: torvalds
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
> base: 4d349ee5c7782f8b27f6cb550f112c5e26fff38d
> arch: amd64
> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
> config: https://ci.syzbot.org/builds/1accd9c8-371e-4c6c-9c4b-b930c65c23be/config
> C repro: https://ci.syzbot.org/findings/ccbdbde1-d214-4e90-aeb7-d4bbda01329c/c_repro
> syz repro: https://ci.syzbot.org/findings/ccbdbde1-d214-4e90-aeb7-d4bbda01329c/syz_repro
>
> ------------[ cut here ]------------
> !ext4_emergency_state(inode->i_sb) && mapping_tagged(&inode->i_data, PAGECACHE_TAG_DIRTY)
> WARNING: fs/ext4/inode.c:192 at ext4_evict_inode+0xce7/0x1020 fs/ext4/inode.c:191, CPU#1: syz-executor/5917
> Modules linked in:
> CPU: 1 UID: 0 PID: 5917 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> RIP: 0010:ext4_evict_inode+0xce7/0x1020 fs/ext4/inode.c:191
> Code: f3 ff ff e8 ab 60 40 ff 49 89 dc 48 8b 5c 24 18 e9 ea f5 ff ff e8 99 60 40 ff 48 8b 5c 24 18 e9 db f5 ff ff e8 8a 60 40 ff 90 <0f> 0b 90 e9 cd f5 ff ff e8 7c 60 40 ff 48 8d 3d 85 e4 92 0d 67 48
> RSP: 0018:ffffc900057e79a0 EFLAGS: 00010293
> RAX: ffffffff82852b46 RBX: ffff88812000f5b8 RCX: ffff88811128ba00
> RDX: 0000000000000000 RSI: 0000000004000000 RDI: 0000000000000000
> RBP: ffffc900057e7ab0 R08: ffff8881111b6387 R09: 1ffff11022236c70
> R10: dffffc0000000000 R11: ffffed1022236c71 R12: 1ffff92000afcf44
> R13: dffffc0000000000 R14: 0000000004000000 R15: ffff8881111b6380
> FS: 0000555570b0d500(0000) GS:ffff8882a9464000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fff533fce88 CR3: 000000010b644000 CR4: 00000000000006f0
> Call Trace:
> <TASK>
> evict+0x61e/0xb10 fs/inode.c:846
> dispose_list fs/inode.c:888 [inline]
> evict_inodes+0x75a/0x7f0 fs/inode.c:942
> generic_shutdown_super+0xaa/0x2d0 fs/super.c:632
> kill_block_super+0x44/0x90 fs/super.c:1725
> ext4_kill_sb+0x68/0xb0 fs/ext4/super.c:7459
> deactivate_locked_super+0xbc/0x130 fs/super.c:476
> cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
> task_work_run+0x1d9/0x270 kernel/task_work.c:233
> resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
> __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
> exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
> __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
> syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
> syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
> do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7fb75539d9d7
> Code: a2 c7 05 1c ed 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
> RSP: 002b:00007ffe2e6b7108 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
> RAX: 0000000000000000 RBX: 00007fb755431f90 RCX: 00007fb75539d9d7
> RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe2e6b71c0
> RBP: 00007ffe2e6b71c0 R08: 00007ffe2e6b81c0 R09: 00000000ffffffff
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe2e6b8250
> R13: 00007fb755431f90 R14: 000000000000f951 R15: 00007ffe2e6b8290
> </TASK>
>
>
> ***
>
> If these findings have caused you to resend the series or submit a
> separate fix, please add the following tag to your commit message:
> Tested-by: syzbot@syzkaller.appspotmail.com
>
> ---
> This report is generated by a bot. It may contain errors.
> syzbot ci engineers can be reached at syzkaller@googlegroups.com.
>
> The email will later be sent to:
> [adilger.kernel@dilger.ca jack@suse.cz linux-ext4@vger.kernel.org tytso@mit.edu yebin@huaweicloud.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> If the report is a false positive, reply with
> #syz invalid
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com.
> To view this discussion visit https://groups.google.com/d/msgid/syzkaller-upstream-moderation/69a3a81a.050a0220.8405f.0000.GAE%40google.com.