From: Warner Losh <imp@bsdimp.com>
To: qemu-devel@nongnu.org
Cc: "Anthony Liguori" <aliguori@us.ibm.com>,
"Juan Quintela" <quintela@redhat.com>,
kevans@freebsd.org, "Warner Losh" <imp@bsdimp.com>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
"Mikaël Urankar" <mikael.urankar@gmail.com>
Subject: [PATCH 2/9] bsd-user: Apply fb7e378cf9c from linux-user (fix FORTIFY warnings)
Date: Thu, 16 Sep 2021 20:56:28 -0600 [thread overview]
Message-ID: <20210917025635.32011-3-imp@bsdimp.com> (raw)
In-Reply-To: <20210917025635.32011-1-imp@bsdimp.com>
From: Mikaël Urankar <mikael.urankar@gmail.com>
linux-user/mmap.c: fix warnings with _FORTIFY_SOURCE
CC i386-linux-user/mmap.o
cc1: warnings being treated as errors
/usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c: In function 'mmap_frag':
/usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c:253: error: ignoring return value of 'pread', declared with attribute warn_unused_result
/usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c: In function 'target_mmap':
/usr/src/RPM/BUILD/qemu-0.11.92/linux-user/mmap.c:477: error: ignoring return value of 'pread', declared with attribute warn_unused_result
make[1]: *** [mmap.o] Error 1
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
[ Merged to bsd-user by Mikaël Urankared updated by Warner Losh for untagged ]
Signed-off-by: Mikaël Urankar <mikael.urankar@gmail.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
bsd-user/mmap.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/bsd-user/mmap.c b/bsd-user/mmap.c
index fc3c1480f5..90b6313161 100644
--- a/bsd-user/mmap.c
+++ b/bsd-user/mmap.c
@@ -174,7 +174,8 @@ static int mmap_frag(abi_ulong real_start,
mprotect(host_start, qemu_host_page_size, prot1 | PROT_WRITE);
/* read the corresponding file data */
- pread(fd, g2h_untagged(start), end - start, offset);
+ if (pread(fd, g2h_untagged(start), end - start, offset) == -1)
+ return -1;
/* put final protection */
if (prot_new != (prot1 | PROT_WRITE))
@@ -593,7 +594,8 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
-1, 0);
if (retaddr == -1)
goto fail;
- pread(fd, g2h_untagged(start), len, offset);
+ if (pread(fd, g2h_untagged(start), len, offset) == -1)
+ goto fail;
if (!(prot & PROT_WRITE)) {
ret = target_mprotect(start, len, prot);
if (ret != 0) {
--
2.32.0
next prev parent reply other threads:[~2021-09-17 2:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 2:56 [PATCH 0/9] bsd-user mmap fixes Warner Losh
2021-09-17 2:56 ` [PATCH 1/9] bsd-user: Apply e6deac9cf99 from linux-user (zero anonymous memory) Warner Losh
2021-09-17 15:02 ` Philippe Mathieu-Daudé
2021-09-17 15:10 ` Warner Losh
2021-09-17 2:56 ` Warner Losh [this message]
2021-09-17 2:56 ` [PATCH 3/9] bsd-user: MAP_ symbols are defined, so no need for ifdefs Warner Losh
2021-09-17 15:03 ` Philippe Mathieu-Daudé
2021-09-17 2:56 ` [PATCH 4/9] bsd-user: mmap return ENOMEM on overflow Warner Losh
2021-09-17 2:56 ` [PATCH 5/9] bsd-user: mmap prefer MAP_ANON for BSD Warner Losh
2021-09-17 15:04 ` Philippe Mathieu-Daudé
2021-09-17 2:56 ` [PATCH 6/9] bsd-user: mmap line wrap change Warner Losh
2021-09-17 2:56 ` [PATCH 7/9] bsd-user: Don't try to mmap fd when it is -1 independently from MAP_ANONYMOUS flag Warner Losh
2021-09-17 2:58 ` Warner Losh
2021-09-17 2:56 ` [PATCH 8/9] bsd-user: Implement MAP_EXCL, required by jemalloc in head Warner Losh
2021-09-17 2:56 ` [PATCH 9/9] bsd-user: Apply 86abac06c14 from linux-user (target_mprotect can't fail) Warner Losh
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