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qemu-edid: Restrict input parameter -d to avoid division by zero

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A zero value for dpi will lead to a division by zero in qemu_edid_dpi_to_mm().
Tested by runnig qemu-edid -dX, X = 0, 100.

Resolves: qemu-project/qemu#1249

Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Sebastian Mitterle <smitterl@redhat.com>
Message-Id: <20221011151216.64897-1-smitterl@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Sebastian Mitterle 2022-10-11 17:12:16 +02:00 committed by Gerd Hoffmann
parent 8af5f82b90
commit 82a628f887
1 changed files with 4 additions and 0 deletions
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qemu-edid.c
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@ -92,6 +92,10 @@ int main(int argc, char *argv[])
fprintf(stderr, "not a number: %s\n", optarg); fprintf(stderr, "not a number: %s\n", optarg);
exit(1); exit(1);
} }
if (dpi == 0) {
fprintf(stderr, "cannot be zero: %s\n", optarg);
exit(1);
}
break; break;
case 'v': case 'v':
info.vendor = optarg; info.vendor = optarg;