Re: [PATCH v2 RESEND] kunit: debugfs: Handle errors from alloc_string_stream()

[David Gow]

On Mon, 30 Oct 2023 at 18:47, Richard Fitzgerald
<rf@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
> In kunit_debugfs_create_suite() give up and skip creating the debugfs
> file if any of the alloc_string_stream() calls return an error or NULL.
> Only put a value in the log pointer of kunit_suite and kunit_test if it
> is a valid pointer to a log.
>
> This prevents the potential invalid dereference reported by smatch:
>
>  lib/kunit/debugfs.c:115 kunit_debugfs_create_suite() error: 'suite->log'
>         dereferencing possible ERR_PTR()
>  lib/kunit/debugfs.c:119 kunit_debugfs_create_suite() error: 'test_case->log'
>         dereferencing possible ERR_PTR()
>
> Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Fixes: 05e2006ce493 ("kunit: Use string_stream for test log")
> ---


Thanks for fixing all the nasty C error handling.

Closes: https://groups.google.com/g/kunit-dev/c/sf6MsFzeEV4
Reviewed-by: David Gow <davidgow@xxxxxxxxxx>

Cheers,
-- David

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