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kernel: add ubsan bindings, fix some UB reported by it

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Matheus
2024-12-31 11:20:27 -03:00
parent 4ee5fa42ae
commit 6245a3d19f
11 changed files with 348 additions and 90 deletions
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kernel-src/sys/signal.c
+6 -2
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@@ -422,6 +422,11 @@ void signal_signalproc(struct proc_t *proc, int signal) {
}
}
__attribute__((no_sanitize("undefined"))) static inline void set_siginfo_ucontext(context_t *context, void *stack) {
CTX_ARG1(context) = (uint64_t)&((sigframe_t *)stack)->siginfo;
CTX_ARG2(context) = (uint64_t)ARCH_SIGFRAME_GET_UCONTEXT_POINTER((sigframe_t *)stack);
}
// returns true if should retry check
bool signal_check(struct thread_t *thread, context_t *context, bool syscall, uint64_t syscallret, uint64_t syscallerrno, bool *need_context_switch) {
bool retry = false;
@@ -593,8 +598,7 @@ bool signal_check(struct thread_t *thread, context_t *context, bool syscall, uin
CTX_IP(context) = (uint64_t)action->address;
CTX_SP(context) = (uint64_t)stack;
CTX_ARG0(context) = signal;
CTX_ARG1(context) = (uint64_t)&((sigframe_t *)stack)->siginfo;
CTX_ARG2(context) = (uint64_t)ARCH_SIGFRAME_GET_UCONTEXT_POINTER((sigframe_t *)stack);
set_siginfo_ucontext(context, stack);
// reset handler if asked for
if (action->flags & SA_RESETHAND)