linux-kernel - [syzbot ci] Re: hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete

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Message-ID: <68d5aee9.050a0220.25d7ab.008a.GAE@google.com>
Date: Thu, 25 Sep 2025 14:06:49 -0700
From: syzbot ci <syzbot+ci74a400bb557985f4@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, david@...hat.com, kartikey406@...il.com, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, muchun.song@...ux.dev, 
	osalvador@...e.de, syzbot@...kaller.appspotmail.com
Cc: syzbot@...ts.linux.dev, syzkaller-bugs@...glegroups.com
Subject: [syzbot ci] Re: hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list

syzbot ci has tested the following series

[v1] hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list
https://lore.kernel.org/all/20250925144934.150299-1-kartikey406@gmail.com
* [PATCH] hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list

and found the following issue:
WARNING: lock held when returning to user space in hugetlb_vmdelete_list

Full report is available here:
https://ci.syzbot.org/series/7d3a090c-ec8f-4d0c-8f7b-8797e63f1fde

***

WARNING: lock held when returning to user space in hugetlb_vmdelete_list

tree:      torvalds
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base:      07e27ad16399afcd693be20211b0dfae63e0615f
arch:      amd64
compiler:  Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config:    https://ci.syzbot.org/builds/06671e7c-eebd-4d11-9f0d-d9dae5637c0a/config
C repro:   https://ci.syzbot.org/findings/75fcdb87-67fc-45ee-a70d-3064e8c1126c/c_repro
syz repro: https://ci.syzbot.org/findings/75fcdb87-67fc-45ee-a70d-3064e8c1126c/syz_repro

================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.0.17/5991 is leaving the kernel with locks still held!
1 lock held by syz.0.17/5991:
 #0: ffff88801f7dcce8 (&resv_map->rw_sema){+.+.}-{4:4}, at: hugetlb_vmdelete_list+0x67/0x230 fs/hugetlbfs/inode.c:490


***

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@...kaller.appspotmail.com

---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@...glegroups.com.