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bpf, btf: Check btf for register_bpf_struct_ops 

Similar to the handling in the functions __register_btf_kfunc_id_set()
and register_btf_id_dtor_kfuncs(), this patch uses the newly added
helper check_btf_kconfigs() to handle module with its btf section
stripped.

While at it, the patch also adds the missed IS_ERR() check to fix the
commit f6be98d199 ("bpf, net: switch to dynamic registration")

Fixes: f6be98d199 ("bpf, net: switch to dynamic registration")
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Link: https://lore.kernel.org/r/69082b9835463fe36f9e354bddf2d0a97df39c2b.1707373307.git.tanggeliang@kylinos.cn
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Geliang Tang 2024-02-08 14:24:23 +08:00 committed by Martin KaFai Lau
parent 9e60b0e025
commit 947e56f82f
1 changed files with 3 additions and 1 deletions
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4
kernel/bpf/btf.c
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@ -8882,7 +8882,9 @@ int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops)
btf = btf_get_module_btf(st_ops->owner);
if (!btf)
return -EINVAL;
return check_btf_kconfigs(st_ops->owner, "struct_ops");
if (IS_ERR(btf))
return PTR_ERR(btf);
log = kzalloc(sizeof(*log), GFP_KERNEL | __GFP_NOWARN);
if (!log) {