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authorLinus Torvalds <torvalds@linux-foundation.org>2020-12-22 13:38:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-22 13:38:17 -0800
commit1375b9803e007842493c64d0d73d7dd0e385e17c (patch)
treebbdba09ad6c044f845a9dc553a88016417c8ad6b /kernel
parentc45647f9f562b52915b43b6bb447827cebf511bd (diff)
parent625d867347c9e84d1ac3c953e1b689f65b603bed (diff)
downloadlinux-1375b9803e007842493c64d0d73d7dd0e385e17c.tar.bz2
Merge branch 'akpm' (patches from Andrew)
Merge KASAN updates from Andrew Morton. This adds a new hardware tag-based mode to KASAN. The new mode is similar to the existing software tag-based KASAN, but relies on arm64 Memory Tagging Extension (MTE) to perform memory and pointer tagging (instead of shadow memory and compiler instrumentation). By Andrey Konovalov and Vincenzo Frascino. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (60 commits) kasan: update documentation kasan, mm: allow cache merging with no metadata kasan: sanitize objects when metadata doesn't fit kasan: clarify comment in __kasan_kfree_large kasan: simplify assign_tag and set_tag calls kasan: don't round_up too much kasan, mm: rename kasan_poison_kfree kasan, mm: check kasan_enabled in annotations kasan: add and integrate kasan boot parameters kasan: inline (un)poison_range and check_invalid_free kasan: open-code kasan_unpoison_slab kasan: inline random_tag for HW_TAGS kasan: inline kasan_reset_tag for tag-based modes kasan: remove __kasan_unpoison_stack kasan: allow VMAP_STACK for HW_TAGS mode kasan, arm64: unpoison stack only with CONFIG_KASAN_STACK kasan: introduce set_alloc_info kasan: rename get_alloc/free_info kasan: simplify quarantine_put call site kselftest/arm64: check GCR_EL1 after context switch ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/fork.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 41906a52a764..37720a6d04ea 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -225,8 +225,8 @@ static unsigned long *alloc_thread_stack_node(struct task_struct *tsk, int node)
if (!s)
continue;
- /* Clear the KASAN shadow of the stack. */
- kasan_unpoison_shadow(s->addr, THREAD_SIZE);
+ /* Mark stack accessible for KASAN. */
+ kasan_unpoison_range(s->addr, THREAD_SIZE);
/* Clear stale pointers from reused stack. */
memset(s->addr, 0, THREAD_SIZE);