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9pfs: assume utimensat() and futimens() are present 

The utimensat() and futimens() syscalls have been around for ages (ie,
glibc 2.6 and linux 2.6.22), and the decision was already taken to
switch to utimensat() anyway when fixing CVE-2016-9602 in 2.9.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Greg Kurz 2017-05-25 10:30:14 +02:00
parent 4be56c1959
commit 24df3371d9
2 changed files with 2 additions and 6 deletions
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3
fsdev/virtfs-proxy-helper.c
View File

@ -945,7 +945,8 @@ static int process_requests(int sock)
&spec[0].tv_sec, &spec[0].tv_nsec,
&spec[1].tv_sec, &spec[1].tv_nsec);
if (retval > 0) {
retval = qemu_utimens(path.data, spec);
retval = utimensat(AT_FDCWD, path.data, spec,
AT_SYMLINK_NOFOLLOW);
if (retval < 0) {
retval = -errno;
}

5
hw/9pfs/9p-handle.c
View File

@ -378,7 +378,6 @@ static int handle_utimensat(FsContext *ctx, V9fsPath *fs_path,
const struct timespec *buf)
{
int ret;
#ifdef CONFIG_UTIMENSAT
int fd;
struct handle_data *data = (struct handle_data *)ctx->private;
@ -388,10 +387,6 @@ static int handle_utimensat(FsContext *ctx, V9fsPath *fs_path,
}
ret = futimens(fd, buf);
close(fd);
#else
ret = -1;
errno = ENOSYS;
#endif
return ret;
}