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tests/qtest/migration-test: Fix bootfile cleanup handling 

If you invoke the migration-test binary in such a way that it doesn't run
any tests, then we never call bootfile_create(), and at the end of
main() bootfile_delete() will try to unlink(NULL), which is not valid.
This can happen if for instance you tell the test binary to run a
subset of tests that turns out to be empty, like this:

 (cd build/asan && QTEST_QEMU_BINARY=./qemu-system-x86_64 ./tests/qtest/migration-test --tap -k -p bang)
 # random seed: R02S6501b289ff8ced4231ba452c3a87bc6f
 # Skipping test: userfaultfd not available
 1..0
 ../../tests/qtest/migration-test.c:182:12: runtime error: null pointer passed as argument 1, which is declared to never be null
 /usr/include/unistd.h:858:48: note: nonnull attribute specified here

Handle this by making bootfile_delete() not needing to do anything
because bootfile_create() was never called.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
[fixed conflict with aee07f2563]
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Peter Maydell 2024-08-20 15:49:04 +01:00 committed by Fabiano Rosas
parent ceb1ab1af4
commit d278455eb1
1 changed files with 4 additions and 4 deletions
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8
tests/qtest/migration-test.c
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@ -145,6 +145,9 @@ static char *bootpath;
static void bootfile_delete(void)
{
if (!bootpath) {
return;
}
unlink(bootpath);
g_free(bootpath);
bootpath = NULL;
@ -156,10 +159,7 @@ static void bootfile_create(char *dir, bool suspend_me)
unsigned char *content;
size_t len;
if (bootpath) {
bootfile_delete();
}
bootfile_delete();
bootpath = g_strdup_printf("%s/bootsect", dir);
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
/* the assembled x86 boot sector should be exactly one sector large */