linux-kernel - Re: [syzbot] [mm?] possible deadlock in shmem_file_write

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Message-ID: <66fa4a57.050a0220.aab67.0027.GAE@google.com>
Date: Sun, 29 Sep 2024 23:51:03 -0700
From: syzbot <syzbot+288aa6838b3263f52e7e@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, ebpqwerty472123@...il.com, hughd@...gle.com, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, paul@...l-moore.com, 
	stephen.smalley.work@...il.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] possible deadlock in shmem_file_write_iter

syzbot has bisected this issue to:

commit ea7e2d5e49c05e5db1922387b09ca74aa40f46e2
Author: Shu Han <ebpqwerty472123@...il.com>
Date:   Tue Sep 17 09:41:04 2024 +0000

    mm: call the security_mmap_file() LSM hook in remap_file_pages()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=110d4ea9980000
start commit:   3efc57369a0c Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=130d4ea9980000
console output: https://syzkaller.appspot.com/x/log.txt?x=150d4ea9980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a4fcb065287cdb84
dashboard link: https://syzkaller.appspot.com/bug?extid=288aa6838b3263f52e7e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17af2980580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11607d9f980000

Reported-by: syzbot+288aa6838b3263f52e7e@...kaller.appspotmail.com
Fixes: ea7e2d5e49c0 ("mm: call the security_mmap_file() LSM hook in remap_file_pages()")

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