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archctl: boundary check

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Matheus
2025-12-05 18:20:09 -03:00
parent 40bbf217ee
commit 64d078c654
1 changed files with 5 additions and 0 deletions
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kernel-src/arch/x86-64/archctl.c
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@@ -17,6 +17,11 @@ syscallret_t syscall_archctl(context_t *context, int func, void *arg) {
.ret = 0 .ret = 0
}; };
if (!IS_USER_ADDRESS(arg)) {
ret.errno = EFAULT;
return ret;
}
switch (func) { switch (func) {
case ARCH_CTL_SET_GSBASE: case ARCH_CTL_SET_GSBASE:
// kernelgsbase because it will be switched out to user // kernelgsbase because it will be switched out to user