linux-kernel - Re: [syzbot] [btrfs?] WARNING: kmalloc bug in btrfs_ioctl

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Message-ID: <0000000000006e58cb05f2d86236@google.com>
Date:   Sun, 22 Jan 2023 03:14:21 -0800
From:   syzbot <syzbot+4376a9a073770c173269@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, clm@...com, dsterba@...e.com,
        dsterba@...e.cz, josef@...icpanda.com, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org,
        w@....eu
Subject: Re: [syzbot] [btrfs?] WARNING: kmalloc bug in btrfs_ioctl_send

syzbot has bisected this issue to:

commit 7661809d493b426e979f39ab512e3adf41fbcc69
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Wed Jul 14 16:45:49 2021 +0000

    mm: don't allow oversized kvmalloc() calls

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13f2c851480000
start commit:   f9ff5644bcc0 Merge tag 'hsi-for-6.2' of git://git.kernel.o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=100ac851480000
console output: https://syzkaller.appspot.com/x/log.txt?x=17f2c851480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=827916bd156c2ec6
dashboard link: https://syzkaller.appspot.com/bug?extid=4376a9a073770c173269
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1775aed7880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11cbcbd0480000

Reported-by: syzbot+4376a9a073770c173269@...kaller.appspotmail.com
Fixes: 7661809d493b ("mm: don't allow oversized kvmalloc() calls")

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