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authorIlya Leoshkevich <iii@linux.ibm.com>2022-08-17 17:05:03 +0200
committerRichard Henderson <richard.henderson@linaro.org>2022-09-06 08:04:25 +0100
commitaa98e2d885ca9de66ddd56d88b19b0e162cc90d7 (patch)
tree62bfe94717671e34be3b22a6cf769830aa7b37c6 /linux-user
parent872f3d046f2381e3f416519e82df96bd60818311 (diff)
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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 <iii@linux.ibm.com> Message-Id: <20220817150506.592862-2-iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/mmap.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 048c413..6a828e8 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;