Your patch is buggy:
+ mm_segment_t old_fs = get_fs();
+ set_fs(KERNEL_DS);
if (__get_user(tmp,pc->name)) {
printk("SLAB: cache with size %d has lost
its name\n",
pc->objsize);
continue;
- }
+ }
+ set_fs(old_fs);
If the __get_user() fails, you will leave the kernel in the
KERNEL_DS segment.
Do it like this instead.
int fault;
mm_segment_t old_fs;
...
old_fs = get_fs();
set_fs(KERNEL_DS);
fault = __get_user(tmp, pc->name);
set_fs(old_fs);
if (fault) {
...
-
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