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[PULL,09/26] linux-user: Pass missing MAP_ANONYMOUS to target_mmap() call

Message ID 68754b442b756e8cb5f143b00937fb7330a51a81.1474546244.git.riku.voipio@linaro.org
State New
Headers show

Commit Message

Riku Voipio Sept. 22, 2016, 12:13 p.m. UTC 
From: Peter Maydell <peter.maydell@linaro.org>

A target_mmap() call in load_elf_binary() was missing the MAP_ANONYMOUS
flag. (Spotted by Coverity, because target_mmap() will try to use
-1 as the filedescriptor in this case.)

This has never been noticed because the code in question is for
handling ancient SVr4 iBCS2 binaries.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/elfload.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 29455e4..e9a3882 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -2233,7 +2233,7 @@  int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
                we do not have the power to recompile these, we emulate
                the SVr4 behavior.  Sigh.  */
             target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
-                        MAP_FIXED | MAP_PRIVATE, -1, 0);
+                        MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
         }
     }