Re: [Linux-kernel-mentees] [PATCH v2] bpf: Fix NULL pointer dereference in __btf_resolve_helper_id()
From: Alexei Starovoitov <hidden>
Date: 2020-07-14 17:27:57
Also in:
bpf, lkml, netdev
On Mon, Jul 13, 2020 at 9:38 PM Andrii Nakryiko [off-list ref] wrote:
On Mon, Jul 13, 2020 at 6:29 PM Peilin Ye [off-list ref] wrote:quoted
Prevent __btf_resolve_helper_id() from dereferencing `btf_vmlinux` as NULL. This patch fixes the following syzbot bug: https://syzkaller.appspot.com/bug?id=5edd146856fd513747c1992442732e5a0e9ba355
The link looks wrong? Nothing in the stack trace indicates this issue.
quoted
Reported-by: syzbot+ee09bda7017345f1fbe6@syzkaller.appspotmail.com Signed-off-by: Peilin Ye <redacted> --- Thank you for reviewing my patch! I am new to Linux kernel development; would the log message and errno be appropriate for this case?I think it's good enough, thanks for the fix. Acked-by: Andrii Nakryiko <redacted>quoted
Change in v2: - Split NULL and IS_ERR cases. kernel/bpf/btf.c | 5 +++++ 1 file changed, 5 insertions(+)[...]
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