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Change History

In the Linux kernel, the following vulnerability has been resolved:

mm/slab: make __free(kfree) accept error pointers

Currently, if an automatically freed allocation is an error pointer that
will lead to a crash.  An example of this is in wm831x_gpio_dbg_show().

   171	char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
   172	if (IS_ERR(label)) {
   173		dev_err(wm831x->dev, "Failed to duplicate label\n");
   174		continue;
   175  }

The auto clean up function should check for err

kernel.org https://git.kernel.org/stable/c/79cbe0be6c0317b215ddd8bd3e32f0afdac48543 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9f6eb0ab4f95240589ee85fd9886a944cd3645b2 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ac6cf3ce9b7d12acb7b528248df5f87caa25fcdc [No types assigned]

kernel.org https://git.kernel.org/stable/c/cd7eb8f83fcf258f71e293f7fc52a70be8ed0128 [No types assigned]