From aa98e2d885ca9de66ddd56d88b19b0e162cc90d7 Mon Sep 17 00:00:00 2001 From: Ilya Leoshkevich Date: Wed, 17 Aug 2022 17:05:03 +0200 Subject: [PATCH] linux-user: Clear translations on mprotect() Currently it's possible to execute pages that do not have PAGE_EXEC if there is an existing translation block. Fix by invalidating TBs that touch the affected pages. Signed-off-by: Ilya Leoshkevich Message-Id: <20220817150506.592862-2-iii@linux.ibm.com> Signed-off-by: Richard Henderson --- linux-user/mmap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 048c4135af..6a828e8418 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -177,9 +177,11 @@ int target_mprotect(abi_ulong start, abi_ulong len, int target_prot) goto error; } } + page_set_flags(start, start + len, page_flags); - mmap_unlock(); - return 0; + tb_invalidate_phys_range(start, start + len); + ret = 0; + error: mmap_unlock(); return ret;