linux-kernel - Re: [syzbot] [mm?] BUG: Bad page map (8)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240719230827.1693-1-hdanton@sina.com>
Date: Sat, 20 Jul 2024 07:08:27 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+ec4b7d82bb051330f15a@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] BUG: Bad page map (8)

On Thu, 18 Jul 2024 15:51:26 -0700
> syzbot found the following issue on:
> 
> HEAD commit:    4d145e3f830b Merge tag 'i2c-for-6.10-rc8' of git://git.ker..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1366ab85980000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git  4d145e3f830b

--- x/mm/truncate.c
+++ y/mm/truncate.c
@@ -192,6 +192,7 @@ int truncate_inode_folio(struct address_
 		return -EIO;
 
 	truncate_cleanup_folio(folio);
+	BUG_ON(folio_mapped(folio));
 	filemap_remove_folio(folio);
 	return 0;
 }
--