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Possible NULL pointer dereference in hol_entry_help


From: Andrei Borzenkov
Subject: Possible NULL pointer dereference in hol_entry_help
Date: Sun, 10 Jan 2016 12:49:37 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0

Found by Coverity scan for GRUB.

hol_entry_help dereferences state parameter without checking for NULL:

            if (first_long_opt || uparams.dup_args)
              arg (real, "=%s", "[=%s]", state->root_argp->argp_domain,
                   stream);

It is called in several places where "state" is explicitly checked for
being NULL before calling hol_entry_help.



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