mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
b3f95490b9
This adds initial support for kernel 4.14 based on the patches for kernel 4.9. In the configuration I deactivated some of the new possible security features like: CONFIG_REFCOUNT_FULL CONFIG_SLAB_FREELIST_HARDENED CONFIG_SOFTLOCKUP_DETECTOR CONFIG_WARN_ALL_UNSEEDED_RANDOM And these overlay FS options are also deactivated: CONFIG_OVERLAY_FS_INDEX CONFIG_OVERLAY_FS_REDIRECT_DIR I activated this: CONFIG_FORTIFY_SOURCE CONFIG_POSIX_TIMERS CONFIG_SLAB_MERGE_DEFAULT CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED I am not sure if I did the porting correct for the following patches: target/linux/generic/backport-4.14/020-backport_netfilter_rtcache.patch target/linux/generic/hack-4.14/220-gc_sections.patch target/linux/generic/hack-4.14/321-powerpc_crtsavres_prereq.patch target/linux/generic/pending-4.14/305-mips_module_reloc.patch target/linux/generic/pending-4.14/611-netfilter_match_bypass_default_table.patch target/linux/generic/pending-4.14/680-NET-skip-GRO-for-foreign-MAC-addresses.patch Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
31 lines
886 B
Diff
31 lines
886 B
Diff
From: Felix Fietkau <nbd@nbd.name>
|
|
Subject: MIPS: fix cache flushing for highmem pages
|
|
|
|
Most cache flush ops were no-op for highmem pages. This led to nasty
|
|
segfaults and (in the case of page_address(page) == NULL) kernel
|
|
crashes.
|
|
|
|
Fix this by always flushing highmem pages using kmap/kunmap_atomic
|
|
around the actual cache flush. This might be a bit inefficient, but at
|
|
least it's stable.
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
|
|
--- a/arch/mips/mm/cache.c
|
|
+++ b/arch/mips/mm/cache.c
|
|
@@ -116,6 +116,13 @@ void __flush_anon_page(struct page *page
|
|
{
|
|
unsigned long addr = (unsigned long) page_address(page);
|
|
|
|
+ if (PageHighMem(page)) {
|
|
+ addr = (unsigned long)kmap_atomic(page);
|
|
+ flush_data_cache_page(addr);
|
|
+ __kunmap_atomic((void *)addr);
|
|
+ return;
|
|
+ }
|
|
+
|
|
if (pages_do_alias(addr, vmaddr)) {
|
|
if (page_mapcount(page) && !Page_dcache_dirty(page)) {
|
|
void *kaddr;
|