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genksyms: Fix segfault with invalid declarations

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Do not try to recover too early and segfault when parsing invalid
declarations such as

echo 'int (int);' | scripts/genksyms/genksyms
echo 'int a, (int);' | scripts/genksyms/genksyms
echo 'extern void *__inline_memcpy((void *), (const void *), (__kernel_size_t));' | scripts/genksyms/genksyms

The last one was a real-life bug with
include/asm-generic/asm-prototypes.h on x86_64.

Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
This commit is contained in:
Michal Marek 2017-01-03 14:40:44 +01:00
parent 7ce7d89f48
commit d920f7c662
1 changed files with 0 additions and 2 deletions
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scripts/genksyms/parse.y
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@ -322,8 +322,6 @@ direct_declarator:
{ $$ = $2; }
| '(' declarator ')'
{ $$ = $3; }
| '(' error ')'
{ $$ = $3; }
;
/* Nested declarators differ from regular declarators in that they do