git.itanic.dy.fi Git - linux-stable/commit

author	Peilin Ye <yepeilin.cs@gmail.com>
	Tue, 14 Jul 2020 18:09:04 +0000 (14:09 -0400)
committer	Daniel Borkmann <daniel@iogearbox.net>
	Wed, 15 Jul 2020 20:53:39 +0000 (22:53 +0200)
commit	5b801dfb7feb2738975d80223efc2fc193e55573
tree	b48c46430339fca6903d01995a8c6b5a57a9cf59	tree \| snapshot
parent	55b244221c3f17eb2ed51c8e39e4a01c523e4eee	commit \| diff

bpf: Fix NULL pointer dereference in __btf_resolve_helper_id()

Prevent __btf_resolve_helper_id() from dereferencing `btf_vmlinux`
as NULL. This patch fixes the following syzbot bug:

https://syzkaller.appspot.com/bug?id=f823224ada908fa5c207902a5a62065e53ca0fcc

Reported-by: syzbot+ee09bda7017345f1fbe6@syzkaller.appspotmail.com
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200714180904.277512-1-yepeilin.cs@gmail.com