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Prevent NULL dereferencing when unregistering ciphers

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2009-12-27 22:29:22 +01:00
parent a2e77ce455
commit 3851cc386e
1 changed files with 8 additions and 2 deletions
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10
lib/crypto.c
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@ -59,7 +59,10 @@ grub_cipher_unregister (gcry_cipher_spec_t *cipher)
gcry_cipher_spec_t **ciph; gcry_cipher_spec_t **ciph;
for (ciph = &grub_ciphers; *ciph; ciph = &((*ciph)->next)) for (ciph = &grub_ciphers; *ciph; ciph = &((*ciph)->next))
if (*ciph == cipher) if (*ciph == cipher)
*ciph = (*ciph)->next; {
*ciph = (*ciph)->next;
break;
}
} }
void void
@ -75,7 +78,10 @@ grub_md_unregister (gcry_md_spec_t *cipher)
gcry_md_spec_t **ciph; gcry_md_spec_t **ciph;
for (ciph = &grub_digests; *ciph; ciph = &((*ciph)->next)) for (ciph = &grub_digests; *ciph; ciph = &((*ciph)->next))
if (*ciph == cipher) if (*ciph == cipher)
*ciph = (*ciph)->next; {
*ciph = (*ciph)->next;
break;
}
} }
void void