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Towards user buffer checking

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This commit is contained in:
Bahadir Balban
2008-04-22 14:18:12 +01:00
parent 1270cfe3b3
commit 59bdaf22ec
3 changed files with 21 additions and 3 deletions
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5
tasks/mm0/src/file.c
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@@ -412,6 +412,11 @@ int sys_write(l4id_t sender, int fd, void *buf, int count)
BUG_ON(!(t = find_task(sender)));
if ((err = check_access(t, buf, count)) < 0) {
l4_ipc_return(err);
return 0;
}
/* TODO: Check user buffer, count and fd validity */
if (fd < 0 || fd > TASK_FILES_MAX) {
l4_ipc_return(-EBADF);