]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
bpf: zero out build_id for BPF_STACK_BUILD_ID_IP
authorStanislav Fomichev <sdf@google.com>
Wed, 16 Jan 2019 22:03:16 +0000 (14:03 -0800)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 17 Jan 2019 15:42:35 +0000 (16:42 +0100)
commit4af396ae4836c4ecab61e975b8e61270c551894d
tree3ea744486f9d9c3582f038e5a04d0aac47812e3d
parent0b698005a9d11c0e91141ec11a2c4918a129f703
bpf: zero out build_id for BPF_STACK_BUILD_ID_IP

When returning BPF_STACK_BUILD_ID_IP from stack_map_get_build_id_offset,
make sure that build_id field is empty. Since we are using percpu
free list, there is a possibility that we might reuse some previous
bpf_stack_build_id with non-zero build_id.

Fixes: 615755a77b24 ("bpf: extend stackmap to save binary_build_id+offset instead of address")
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
kernel/bpf/stackmap.c