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selftests/bpf: Restrict bpf_set_retval argument in sk_bypass_prot_mem

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Test sk_bypass_prot_mem passes an unchecked value as argument to helper
bpf_set_retval(). The argument can be outside the valid range enforced
by the strict retval validation added in the next patch.

Restrict the argument to -EFAULT when it is outside the valid range, so
the test will not be rejected by the verifier when retval validation
is enforced.

Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/r/20260605140243.664590-2-xukuohai@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Xu Kuohai 2026-06-05 14:02:41 +00:00 committed by Alexei Starovoitov
parent b403670b82
commit 6fa2839893
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/bpf/progs/sk_bypass_prot_mem.c
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@ -5,6 +5,7 @@
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <errno.h>
#include "err.h"
extern int tcp_memory_per_cpu_fw_alloc __ksym;
extern int udp_memory_per_cpu_fw_alloc __ksym;
@ -97,6 +98,7 @@ int sock_create(struct bpf_sock *ctx)
return 1;
err:
set_if_not_errno_or_zero(err, -EFAULT);
bpf_set_retval(err);
return 0;
}