#include <linux/vmalloc.h>
#include <linux/io_uring.h>
#include <linux/syscall_user_dispatch.h>
+#include <linux/coredump.h>
#include <linux/uaccess.h>
#include <asm/mmu_context.h>
char *__get_task_comm(char *buf, size_t buf_size, struct task_struct *tsk)
{
task_lock(tsk);
- strncpy(buf, tsk->comm, buf_size);
+ /* Always NUL terminated and zero-padded */
+ strscpy_pad(buf, tsk->comm, buf_size);
task_unlock(tsk);
return buf;
}
{
task_lock(tsk);
trace_task_rename(tsk, buf);
- strlcpy(tsk->comm, buf, sizeof(tsk->comm));
+ strscpy_pad(tsk->comm, buf, sizeof(tsk->comm));
task_unlock(tsk);
perf_event_comm(tsk, exec);
}
argv, envp, flags);
}
#endif
+
+#ifdef CONFIG_SYSCTL
+
+static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
+
+ if (!error)
+ validate_coredump_safety();
+ return error;
+}
+
+static struct ctl_table fs_exec_sysctls[] = {
+ {
+ .procname = "suid_dumpable",
+ .data = &suid_dumpable,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax_coredump,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_TWO,
+ },
+ { }
+};
+
+static int __init init_fs_exec_sysctls(void)
+{
+ register_sysctl_init("fs", fs_exec_sysctls);
+ return 0;
+}
+
+fs_initcall(init_fs_exec_sysctls);
+#endif /* CONFIG_SYSCTL */