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linux-user/aarch64: Do not allow duplicate or short sve records

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In parse_user_sigframe, the kernel rejects duplicate sve records,
or records that are smaller than the header.  We were silently
allowing these cases to pass, dropping the record.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-38-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-07-08 20:45:32 +05:30 committed by Peter Maydell
parent 5726597c3b
commit affb1a50b9
1 changed files with 4 additions and 1 deletions
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5
linux-user/aarch64/signal.c
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@ -318,10 +318,13 @@ static int target_restore_sigframe(CPUARMState *env,
break;
case TARGET_SVE_MAGIC:
if (sve || size < sizeof(struct target_sve_context)) {
goto err;
}
if (cpu_isar_feature(aa64_sve, env_archcpu(env))) {
vq = sve_vq(env);
sve_size = QEMU_ALIGN_UP(TARGET_SVE_SIG_CONTEXT_SIZE(vq), 16);
if (!sve && size == sve_size) {
if (size == sve_size) {
sve = (struct target_sve_context *)ctx;
break;
}