diff options
| author | Peter Maydell | 2016-07-12 14:02:16 +0200 |
|---|---|---|
| committer | Riku Voipio | 2016-08-04 15:36:26 +0200 |
| commit | 332c9781f6a7c496adf605a1be72776598c7adc2 (patch) | |
| tree | 87817914c04fd6135a714602e01bbb1cb2f690bd /linux-user/syscall.c | |
| parent | linux-user: Fix memchr() argument in open_self_cmdline() (diff) | |
| download | qemu-332c9781f6a7c496adf605a1be72776598c7adc2.tar.gz qemu-332c9781f6a7c496adf605a1be72776598c7adc2.tar.xz qemu-332c9781f6a7c496adf605a1be72776598c7adc2.zip | |
linux-user: Don't write off end of new_utsname buffer
Use g_strlcpy() rather than strcpy() to copy the uname string
into the structure we return to the guest for the uname syscall.
This avoids overrunning the buffer if the user passed us an
overlong string via the QEMU command line.
We fix a comment typo while we're in the neighbourhood.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 092ff4ee21..5bc42c017e 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -9237,12 +9237,14 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, goto efault; ret = get_errno(sys_uname(buf)); if (!is_error(ret)) { - /* Overrite the native machine name with whatever is being + /* Overwrite the native machine name with whatever is being emulated. */ strcpy (buf->machine, cpu_to_uname_machine(cpu_env)); /* Allow the user to override the reported release. */ - if (qemu_uname_release && *qemu_uname_release) - strcpy (buf->release, qemu_uname_release); + if (qemu_uname_release && *qemu_uname_release) { + g_strlcpy(buf->release, qemu_uname_release, + sizeof(buf->release)); + } } unlock_user_struct(buf, arg1, 1); } |