Commit 9cb65bc3 authored by Mika Penttilä's avatar Mika Penttilä Committed by Linus Torvalds

mm/memory.c: make apply_to_page_range() more robust

Arm and arm64 used to trigger this BUG_ON() - this has now been fixed.

But a WARN_ON() here is sufficient to catch future buggy callers.
Signed-off-by: default avatarMika Penttilä <>
Reviewed-by: default avatarPekka Enberg <>
Acked-by: default avatarDavid Rientjes <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 4355c018
......@@ -1876,7 +1876,9 @@ int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
unsigned long end = addr + size;
int err;
BUG_ON(addr >= end);
if (WARN_ON(addr >= end))
return -EINVAL;
pgd = pgd_offset(mm, addr);
do {
next = pgd_addr_end(addr, end);
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