Unverified Commit 920d5152 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!13967 bpf: Check validity of link->type in bpf_link_show_fdinfo() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Pu Lehui <pulehui@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/WK2AKWH3KPNFJUF7MSEW5SZCSJLVI2OL/ 
 
https://gitee.com/src-openeuler/kernel/issues/IB705A 
 
Link:https://gitee.com/openeuler/kernel/pulls/13967

 

Reviewed-by: default avatarXu Kuohai <xukuohai@huawei.com>
Reviewed-by: default avatarLi Nan <linan122@huawei.com>
Reviewed-by: default avatarYe Weihua <yeweihua4@huawei.com>
Signed-off-by: default avatarLi Nan <linan122@huawei.com>
parents 391056ff b0315e36

kernel/bpf/syscall.c

+7 −2
Original line number Diff line number Diff line
@@ -2430,15 +2430,20 @@ static void bpf_link_show_fdinfo(struct seq_file *m, struct file *filp) 
{

	const struct bpf_link *link = filp->private_data;

	const struct bpf_prog *prog = link->prog;

	enum bpf_link_type type = link->type;

	char prog_tag[sizeof(prog->tag) * 2 + 1] = { };



	bin2hex(prog_tag, prog->tag, sizeof(prog->tag));

	if (type < ARRAY_SIZE(bpf_link_type_strs) && bpf_link_type_strs[type]) {

		seq_printf(m, "link_type:\t%s\n", bpf_link_type_strs[type]);

	} else {

		WARN_ONCE(1, "missing BPF_LINK_TYPE(...) for link type %u\n", type);

		seq_printf(m, "link_type:\t<%u>\n", type);

	}

	seq_printf(m,

		   "link_type:\t%s\n"

		   "link_id:\t%u\n"

		   "prog_tag:\t%s\n"

		   "prog_id:\t%u\n",

		   bpf_link_type_strs[link->type],

		   link->id,

		   prog_tag,

		   prog->aux->id);