cf465e1c21
A few gcc9 related patches, and one to add the md-clear cpu feature. OBS-URL: https://build.opensuse.org/request/show/703018 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=470
48 lines
2.0 KiB
Diff
48 lines
2.0 KiB
Diff
From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
|
||
Date: Wed, 1 May 2019 15:46:46 +0100
|
||
Subject: linux-user: avoid string truncation warnings in uname field copying
|
||
MIME-Version: 1.0
|
||
Content-Type: text/plain; charset=UTF-8
|
||
Content-Transfer-Encoding: 8bit
|
||
|
||
In file included from /usr/include/string.h:494,
|
||
from include/qemu/osdep.h:101,
|
||
from linux-user/uname.c:20:
|
||
In function ‘strncpy’,
|
||
inlined from ‘sys_uname’ at linux-user/uname.c:94:3:
|
||
/usr/include/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 64 [-Wstringop-truncation]
|
||
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
|
||
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
||
We don't care where the NUL terminator in the original uname
|
||
field was. It suffices to copy the entire original field and
|
||
simply force a NUL terminator at the end of the new field.
|
||
|
||
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
|
||
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
|
||
Message-Id: <20190501144646.4851-1-berrange@redhat.com>
|
||
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
|
||
[BR: Played with indent to avoid error from checkpatch.pl]
|
||
(cherry picked from commit b2acfb55962bc8caeaa50a5158da2f701f2c1f7c)
|
||
Signed-off-by: Bruce Rogers <brogers@suse.com>
|
||
---
|
||
linux-user/uname.c | 5 ++---
|
||
1 file changed, 2 insertions(+), 3 deletions(-)
|
||
|
||
diff --git a/linux-user/uname.c b/linux-user/uname.c
|
||
index 313b79dbad..0c6ddf2ad9 100644
|
||
--- a/linux-user/uname.c
|
||
+++ b/linux-user/uname.c
|
||
@@ -72,9 +72,8 @@ const char *cpu_to_uname_machine(void *cpu_env)
|
||
|
||
#define COPY_UTSNAME_FIELD(dest, src) \
|
||
do { \
|
||
- /* __NEW_UTS_LEN doesn't include terminating null */ \
|
||
- (void) strncpy((dest), (src), __NEW_UTS_LEN); \
|
||
- (dest)[__NEW_UTS_LEN] = '\0'; \
|
||
+ memcpy((dest), (src), MIN(sizeof(src), sizeof(dest))); \
|
||
+ (dest)[sizeof(dest) - 1] = '\0'; \
|
||
} while (0)
|
||
|
||
int sys_uname(struct new_utsname *buf)
|