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gpg: Change a bug() call to a regular error message.

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* g10/decrypt-data.c (decrypt_data): Return an error code instead of
calling BUG().
--

This code path can be triggered by fuzzing gpg and thus with some
likeness also by corrupt messages for other reasons.
This commit is contained in:
Werner Koch 2014-11-26 10:21:01 +01:00
parent 8445ef24fc
commit 1c2140346d
1 changed files with 6 additions and 1 deletions
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7
g10/decrypt-data.c
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@ -130,7 +130,12 @@ decrypt_data (ctrl_t ctrl, void *procctx, PKT_encrypted *ed, DEK *dek)
log_fatal ("unsupported blocksize %u\n", blocksize ); log_fatal ("unsupported blocksize %u\n", blocksize );
nprefix = blocksize; nprefix = blocksize;
if ( ed->len && ed->len < (nprefix+2) ) if ( ed->len && ed->len < (nprefix+2) )
BUG(); {
/* An invalid message. We can't check that during parsing
because we may not know the used cipher then. */
rc = gpg_error (GPG_ERR_INV_PACKET);
goto leave;
}
if ( ed->mdc_method ) if ( ed->mdc_method )
{ {