syscall fixes

2026-10-12 19:05:42 +02:00
parent bc5f01dab6
commit 060983bbf6
5 changed files with 16 additions and 9 deletions
@@ -19,10 +19,15 @@ enum syslog_kind : uintptr_t {
 struct syscall_ret sys_syslog(enum syslog_kind kind, __user char* message, size_t len) {
    struct syscall_ret ret = {};

-    const size_t buf_len = MIN(len + 1, 0x1000);
+    const size_t buf_len = MIN(len + 1, 256);
    char* buf = mem_alloc(buf_len, ALLOC_NOZERO);
-    usercopy_read(buf, message, buf_len - 1);
-    buf[buf_len] = 0;
+    if (!usercopy_read(buf, message, buf_len - 1)) {
+        mem_free(buf);
+
+        ret.error = EFAULT;
+        return ret;
+    }
+    buf[buf_len - 1] = 0;

    const char* log_level;
    switch (kind) {