| Message ID | 20220923050039.3371091-1-davidgow@google.com |
|---|---|
| State | Accepted |
| Commit | 3c4fc7bf4c9e66fe71abcbf93f62f4ddb89b7f15 |
| Headers | show |
| Series | kunit: tool: Don't download risc-v opensbi firmware with wget | expand |
On Fri, Sep 23, 2022 at 1:01 AM 'David Gow' via KUnit Development <kunit-dev@googlegroups.com> wrote: > > When running a RISC-V test kernel under QEMU, we need an OpenSBI BIOS > file. In the original QEMU support patchset, kunit_tool would optionally > download this file from GitHub if it didn't exist, using wget. > > These days, it can usually be found in the distro's qemu-system-riscv > package, and is located in /usr/share/qemu on all the distros I tried > (Debian, Arch, OpenSUSE). Use this file, and thereby don't do any > downloading in kunit_tool. > > In addition, we used to shell out to whatever 'wget' was in the path, > which could have potentially been used to trick the developer into > running another binary. By not using wget at all, we nicely sidestep > this issue. > > Cc: Xu Panda <xu.panda@zte.com.cn> > Fixes: 87c9c1631788 ("kunit: tool: add support for QEMU") > Reported-by: Zeal Robot <zealci@zte.com.cn> > Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
diff --git a/tools/testing/kunit/qemu_configs/riscv.py b/tools/testing/kunit/qemu_configs/riscv.py index 6207be146d26..12a1d525978a 100644 --- a/tools/testing/kunit/qemu_configs/riscv.py +++ b/tools/testing/kunit/qemu_configs/riscv.py @@ -3,17 +3,13 @@ import os import os.path import sys -GITHUB_OPENSBI_URL = 'https://github.com/qemu/qemu/raw/master/pc-bios/opensbi-riscv64-generic-fw_dynamic.bin' -OPENSBI_FILE = os.path.basename(GITHUB_OPENSBI_URL) +OPENSBI_FILE = 'opensbi-riscv64-generic-fw_dynamic.bin' +OPENSBI_PATH = '/usr/share/qemu/' + OPENSBI_FILE -if not os.path.isfile(OPENSBI_FILE): - print('\n\nOpenSBI file is not in the current working directory.\n' - 'Would you like me to download it for you from:\n' + GITHUB_OPENSBI_URL + ' ?\n') - response = input('yes/[no]: ') - if response.strip() == 'yes': - os.system('wget ' + GITHUB_OPENSBI_URL) - else: - sys.exit() +if not os.path.isfile(OPENSBI_PATH): + print('\n\nOpenSBI bios was not found in "' + OPENSBI_PATH + '".\n' + 'Please ensure that qemu-system-riscv is installed, or edit the path in "qemu_configs/riscv.py"\n') + sys.exit() QEMU_ARCH = QemuArchParams(linux_arch='riscv', kconfig=''' @@ -29,4 +25,4 @@ CONFIG_SERIAL_EARLYCON_RISCV_SBI=y''', extra_qemu_params=[ '-machine', 'virt', '-cpu', 'rv64', - '-bios', 'opensbi-riscv64-generic-fw_dynamic.bin']) + '-bios', OPENSBI_PATH])
When running a RISC-V test kernel under QEMU, we need an OpenSBI BIOS file. In the original QEMU support patchset, kunit_tool would optionally download this file from GitHub if it didn't exist, using wget. These days, it can usually be found in the distro's qemu-system-riscv package, and is located in /usr/share/qemu on all the distros I tried (Debian, Arch, OpenSUSE). Use this file, and thereby don't do any downloading in kunit_tool. In addition, we used to shell out to whatever 'wget' was in the path, which could have potentially been used to trick the developer into running another binary. By not using wget at all, we nicely sidestep this issue. Cc: Xu Panda <xu.panda@zte.com.cn> Fixes: 87c9c1631788 ("kunit: tool: add support for QEMU") Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: David Gow <davidgow@google.com> --- This is a replacement for "kunit: tool: use absolute path for wget": https://lore.kernel.org/linux-kselftest/20220922083610.235936-1-xu.panda@zte.com.cn/ Instead of just changing the path to wget, it removes the download option completely and grabs the opensbi-riscv64-generic-fw_dynamic.bin from the /usr/share/qemu directory, where the distro package manager should have put it. I _think_ this should be okay to treat as a fix: we were always grabbing this from the QEMU GitHub repository, so it should be widely available. And if you want to treat the wget use as a security issue, getting rid of it everywhere would be nice. Thoughts? -- David --- tools/testing/kunit/qemu_configs/riscv.py | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-)