diff options
Diffstat (limited to 'arch/arm64/kernel/vdso.c')
| -rw-r--r-- | arch/arm64/kernel/vdso.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index 16bf0b46fb70..159b72a646ab 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -318,17 +318,20 @@ static int aarch32_alloc_kuser_vdso_page(void) return 0; } +#define COMPAT_SIGPAGE_POISON_WORD 0xe7fddef1 static int aarch32_alloc_sigpage(void) { extern char __aarch32_sigret_code_start[], __aarch32_sigret_code_end[]; int sigret_sz = __aarch32_sigret_code_end - __aarch32_sigret_code_start; - unsigned long sigpage; + __le32 poison = cpu_to_le32(COMPAT_SIGPAGE_POISON_WORD); + void *sigpage; - sigpage = get_zeroed_page(GFP_KERNEL); + sigpage = (void *)__get_free_page(GFP_KERNEL); if (!sigpage) return -ENOMEM; - memcpy((void *)sigpage, __aarch32_sigret_code_start, sigret_sz); + memset32(sigpage, (__force u32)poison, PAGE_SIZE / sizeof(poison)); + memcpy(sigpage, __aarch32_sigret_code_start, sigret_sz); aarch32_sig_page = virt_to_page(sigpage); return 0; } |