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

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Message-ID: <676edd8c.050a0220.2f3838.0487.GAE@google.com>
Date: Fri, 27 Dec 2024 09:02:04 -0800
From: syzbot <syzbot+ec4b7d82bb051330f15a@...kaller.appspotmail.com>
To: Liam.Howlett@...cle.com, Liam.Howlett@...cle.com, 
	akpm@...ux-foundation.org, david@...hat.com, hdanton@...a.com, 
	hughd@...gle.com, jannh@...gle.com, liam.howlett@...cle.com, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, lorenzo.stoakes@...cle.com, 
	syzkaller-bugs@...glegroups.com, vbabka@...e.cz, vivek.kasireddy@...el.com, 
	willy@...radead.org
Subject: Re: [syzbot] [mm?] BUG: Bad page map (8)

syzbot suspects this issue was fixed by commit:

commit 79f3d123caedbac30a6fd75f9597b2a60a89d513
Author: Liam R. Howlett <Liam.Howlett@...cle.com>
Date:   Wed Oct 16 01:34:55 2024 +0000

    mm/mmap: fix race in mmap_region() with ftruncate()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17d2d018580000
start commit:   3efc57369a0c Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=a4fcb065287cdb84
dashboard link: https://syzkaller.appspot.com/bug?extid=ec4b7d82bb051330f15a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=113acd9f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14cc0127980000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: mm/mmap: fix race in mmap_region() with ftruncate()

For information about bisection process see: https://goo.gl/tpsmEJ#bisection