If memory_failure() succeeds to hwpoison a page, the set_mce_nospec() is expected to be called to prevent speculative access to the page by marking it not-present. Add such missing call to set_mce_nospec() in async memory failure handling scene. Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> --- mm/memory-failure.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index e245191e6b04..c7f88c4042d4 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -63,6 +63,7 @@ #include <linux/pagewalk.h> #include <linux/shmem_fs.h> #include <linux/sysctl.h> +#include <linux/set_memory.h> #include "swap.h" #include "internal.h" #include "ras/ras_event.h" @@ -2407,7 +2408,9 @@ static void memory_failure_work_func(struct work_struct *work) if (entry.flags & MF_SOFT_OFFLINE) soft_offline_page(entry.pfn, entry.flags); else - memory_failure(entry.pfn, entry.flags); + if (!memory_failure(entry.pfn, entry.flags)) + if (!entry.flags & MF_SW_SIMULATED) + set_mce_nospec(entry.pfn); } } -- 2.33.0
