lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 20 Jul 2022 13:46:52 +0200 From: Artem Savkov <asavkov@...hat.com> To: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org, netdev@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Andrea Arcangeli <aarcange@...hat.com>, Daniel Vacek <dvacek@...hat.com>, Jiri Olsa <olsajiri@...il.com>, Song Liu <song@...nel.org>, Artem Savkov <asavkov@...hat.com> Subject: [PATCH bpf-next 4/4] bpf: export crash_kexec() as destructive kfunc Allow properly marked bpf programs to call crash_kexec(). Signed-off-by: Artem Savkov <asavkov@...hat.com> --- kernel/kexec_core.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index 4d34c78334ce4..a21fe8d326a8e 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -39,6 +39,8 @@ #include <linux/hugetlb.h> #include <linux/objtool.h> #include <linux/kmsg_dump.h> +#include <linux/btf.h> +#include <linux/btf_ids.h> #include <asm/page.h> #include <asm/sections.h> @@ -1238,3 +1240,23 @@ void __weak arch_kexec_protect_crashkres(void) void __weak arch_kexec_unprotect_crashkres(void) {} + +#ifdef CONFIG_DEBUG_INFO_BTF_MODULES +BTF_SET_START(kexec_btf_ids) +BTF_ID(func, crash_kexec) +BTF_SET_END(kexec_btf_ids) + +static const struct btf_kfunc_id_set kexec_kfunc_set = { + .owner = THIS_MODULE, + .check_set = &kexec_btf_ids, + .destructive_set = &kexec_btf_ids, +}; + +static int __init crash_kfunc_init(void) +{ + register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &kexec_kfunc_set); + return 0; +} + +subsys_initcall(crash_kfunc_init); +#endif -- 2.35.3
Powered by blists - more mailing lists