mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
b03b467944
If get_fs() == USER_DS we better test if current->mm is not zero before walking page tables. The page table walk code would try to lock mm->page_table_lock, however if mm is zero this might crash. Now it is arguably incorrect trying to access userspace if current->mm is zero, however we have seen that and s390 would be the only architecture which would crash in such a case. So we better make the page table walk code a bit more robust and report always a fault instead. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
||
|---|---|---|
| .. | ||
| appldata | ||
| boot | ||
| configs | ||
| crypto | ||
| hypfs | ||
| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| pci | ||
| defconfig | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||