Avoid NULL pointer dereferences
Add back NULL pointer checks accidentally dropped in r364946. We need to append a NUL character when that happens.
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17c219fd6f
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5eade881a8
@ -5499,11 +5499,20 @@ sysctl_devices(SYSCTL_HANDLER_ARGS)
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udev->dv_flags = dev->flags;
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udev->dv_state = dev->state;
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sbuf_new(&sb, udev->dv_fields, sizeof(udev->dv_fields), SBUF_FIXEDLEN);
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sbuf_cat(&sb, dev->nameunit);
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if (dev->nameunit != NULL)
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sbuf_cat(&sb, dev->nameunit);
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else
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sbuf_putc(&sb, '\0');
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sbuf_putc(&sb, '\0');
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sbuf_cat(&sb, dev->desc);
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if (dev->desc != NULL)
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sbuf_cat(&sb, dev->desc);
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else
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sbuf_putc(&sb, '\0');
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sbuf_putc(&sb, '\0');
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sbuf_cat(&sb, dev->driver != NULL ? dev->driver->name : '\0');
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if (dev->driver != NULL)
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sbuf_cat(&sb, dev->driver->name);
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else
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sbuf_putc(&sb, '\0');
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sbuf_putc(&sb, '\0');
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bus_child_pnpinfo_sb(dev, &sb);
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sbuf_putc(&sb, '\0');
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