linux-kernel - Re: [syzbot] [bpf?] UBSAN: array-index-out-of-bounds in check_stack_range

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Date: Wed, 20 Mar 2024 12:53:03 -0700
From: syzbot <syzbot+33f4297b5f927648741a@...kaller.appspotmail.com>
To: eadavis@...com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bpf?] UBSAN: array-index-out-of-bounds in check_stack_range_initialized

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

kernel/bpf/verifier.c:10263:13: error: member reference type 'struct bpf_call_arg_meta' is not a pointer; did you mean to use '.'?
kernel/bpf/verifier.c:10263:28: error: member reference type 'struct bpf_call_arg_meta' is not a pointer; did you mean to use '.'?
kernel/bpf/verifier.c:10263:53: error: member reference type 'struct bpf_call_arg_meta' is not a pointer; did you mean to use '.'?

Tested on:

commit:         114b5b3b bpf, arm64: fix bug in BPF_LDX_MEMSX
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master
kernel config:  https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440
dashboard link: https://syzkaller.appspot.com/bug?extid=33f4297b5f927648741a
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=11495c6e180000