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Re: [PATCH 4/6] tests/qtest/virtio-iommu-test: Don't pass uninitialized


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH 4/6] tests/qtest/virtio-iommu-test: Don't pass uninitialized data into qtest_memwrite
Date: Mon, 9 Dec 2024 22:06:06 +0100
User-agent: Mozilla Thunderbird

On 9/12/24 21:44, Fabiano Rosas wrote:
Valgrind complains about:

Use of uninitialised value of size 8
&
Conditional jump or move depends on uninitialised value(s)

both at:
    at 0x5265931: _itoa_word (_itoa.c:180)
    by 0x527EEC7: __vfprintf_internal (vfprintf-internal.c:1687)
    by 0x528C8B0: __vsprintf_internal (iovsprintf.c:96)
    by 0x526B920: sprintf (sprintf.c:30)
    by 0x1296C7: qtest_memwrite (libqtest.c:1273)
    by 0x193C04: send_map (virtio-iommu-test.c:125)
    by 0x194392: test_attach_detach (virtio-iommu-test.c:214)
    by 0x17BDE7: run_one_test (qos-test.c:181)
    by 0x4B0699D: test_case_run (gtestutils.c:2900)
    by 0x4B0699D: g_test_run_suite_internal (gtestutils.c:2988)
    by 0x4B068B2: g_test_run_suite_internal (gtestutils.c:3005)
    by 0x4B068B2: g_test_run_suite_internal (gtestutils.c:3005)
    by 0x4B068B2: g_test_run_suite_internal (gtestutils.c:3005)
  Uninitialised value was created by a stack allocation
    at 0x193AFD: send_map (virtio-iommu-test.c:103)

Signed-off-by: Fabiano Rosas <farosas@suse.de>
---
  tests/qtest/virtio-iommu-test.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>




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