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Merge tag 'asn1-fixes-20150805' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into next
This commit is contained in:
James Morris
commit
459c15e53c
@ -45,23 +45,27 @@ enum asn1_opcode {
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ASN1_OP_MATCH_JUMP = 0x04,
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ASN1_OP_MATCH_JUMP_OR_SKIP = 0x05,
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ASN1_OP_MATCH_ANY = 0x08,
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ASN1_OP_MATCH_ANY_OR_SKIP = 0x09,
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ASN1_OP_MATCH_ANY_ACT = 0x0a,
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ASN1_OP_MATCH_ANY_ACT_OR_SKIP = 0x0b,
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/* Everything before here matches unconditionally */
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ASN1_OP_COND_MATCH_OR_SKIP = 0x11,
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ASN1_OP_COND_MATCH_ACT_OR_SKIP = 0x13,
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ASN1_OP_COND_MATCH_JUMP_OR_SKIP = 0x15,
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ASN1_OP_COND_MATCH_ANY = 0x18,
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ASN1_OP_COND_MATCH_ANY_OR_SKIP = 0x19,
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ASN1_OP_COND_MATCH_ANY_ACT = 0x1a,
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ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP = 0x1b,
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/* Everything before here will want a tag from the data */
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#define ASN1_OP__MATCHES_TAG ASN1_OP_COND_MATCH_ANY_ACT
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#define ASN1_OP__MATCHES_TAG ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP
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/* These are here to help fill up space */
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ASN1_OP_COND_FAIL = 0x1b,
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ASN1_OP_COMPLETE = 0x1c,
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ASN1_OP_ACT = 0x1d,
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ASN1_OP_RETURN = 0x1e,
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ASN1_OP_COND_FAIL = 0x1c,
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ASN1_OP_COMPLETE = 0x1d,
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ASN1_OP_ACT = 0x1e,
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ASN1_OP_MAYBE_ACT = 0x1f,
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/* The following eight have bit 0 -> SET, 1 -> OF, 2 -> ACT */
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ASN1_OP_END_SEQ = 0x20,
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@ -76,6 +80,8 @@ enum asn1_opcode {
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#define ASN1_OP_END__OF 0x02
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#define ASN1_OP_END__ACT 0x04
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ASN1_OP_RETURN = 0x28,
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ASN1_OP__NR
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};
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@ -24,15 +24,20 @@ static const unsigned char asn1_op_lengths[ASN1_OP__NR] = {
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[ASN1_OP_MATCH_JUMP] = 1 + 1 + 1,
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[ASN1_OP_MATCH_JUMP_OR_SKIP] = 1 + 1 + 1,
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[ASN1_OP_MATCH_ANY] = 1,
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[ASN1_OP_MATCH_ANY_OR_SKIP] = 1,
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[ASN1_OP_MATCH_ANY_ACT] = 1 + 1,
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[ASN1_OP_MATCH_ANY_ACT_OR_SKIP] = 1 + 1,
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[ASN1_OP_COND_MATCH_OR_SKIP] = 1 + 1,
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[ASN1_OP_COND_MATCH_ACT_OR_SKIP] = 1 + 1 + 1,
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[ASN1_OP_COND_MATCH_JUMP_OR_SKIP] = 1 + 1 + 1,
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[ASN1_OP_COND_MATCH_ANY] = 1,
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[ASN1_OP_COND_MATCH_ANY_OR_SKIP] = 1,
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[ASN1_OP_COND_MATCH_ANY_ACT] = 1 + 1,
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[ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP] = 1 + 1,
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[ASN1_OP_COND_FAIL] = 1,
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[ASN1_OP_COMPLETE] = 1,
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[ASN1_OP_ACT] = 1 + 1,
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[ASN1_OP_MAYBE_ACT] = 1 + 1,
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[ASN1_OP_RETURN] = 1,
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[ASN1_OP_END_SEQ] = 1,
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[ASN1_OP_END_SEQ_OF] = 1 + 1,
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@ -177,6 +182,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder,
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unsigned char flags = 0;
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#define FLAG_INDEFINITE_LENGTH 0x01
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#define FLAG_MATCHED 0x02
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#define FLAG_LAST_MATCHED 0x04 /* Last tag matched */
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#define FLAG_CONS 0x20 /* Corresponds to CONS bit in the opcode tag
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* - ie. whether or not we are going to parse
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* a compound type.
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@ -208,9 +214,9 @@ next_op:
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unsigned char tmp;
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/* Skip conditional matches if possible */
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if ((op & ASN1_OP_MATCH__COND &&
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flags & FLAG_MATCHED) ||
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dp == datalen) {
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if ((op & ASN1_OP_MATCH__COND && flags & FLAG_MATCHED) ||
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(op & ASN1_OP_MATCH__SKIP && dp == datalen)) {
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flags &= ~FLAG_LAST_MATCHED;
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pc += asn1_op_lengths[op];
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goto next_op;
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}
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@ -302,7 +308,9 @@ next_op:
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/* Decide how to handle the operation */
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switch (op) {
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case ASN1_OP_MATCH_ANY_ACT:
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case ASN1_OP_MATCH_ANY_ACT_OR_SKIP:
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case ASN1_OP_COND_MATCH_ANY_ACT:
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case ASN1_OP_COND_MATCH_ANY_ACT_OR_SKIP:
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ret = actions[machine[pc + 1]](context, hdr, tag, data + dp, len);
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if (ret < 0)
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return ret;
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@ -319,8 +327,10 @@ next_op:
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case ASN1_OP_MATCH:
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case ASN1_OP_MATCH_OR_SKIP:
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case ASN1_OP_MATCH_ANY:
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case ASN1_OP_MATCH_ANY_OR_SKIP:
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case ASN1_OP_COND_MATCH_OR_SKIP:
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case ASN1_OP_COND_MATCH_ANY:
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case ASN1_OP_COND_MATCH_ANY_OR_SKIP:
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skip_data:
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if (!(flags & FLAG_CONS)) {
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if (flags & FLAG_INDEFINITE_LENGTH) {
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@ -422,8 +432,15 @@ next_op:
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pc += asn1_op_lengths[op];
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goto next_op;
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case ASN1_OP_MAYBE_ACT:
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if (!(flags & FLAG_LAST_MATCHED)) {
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pc += asn1_op_lengths[op];
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goto next_op;
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}
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case ASN1_OP_ACT:
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ret = actions[machine[pc + 1]](context, hdr, tag, data + tdp, len);
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if (ret < 0)
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return ret;
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pc += asn1_op_lengths[op];
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goto next_op;
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@ -431,6 +448,7 @@ next_op:
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if (unlikely(jsp <= 0))
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goto jump_stack_underflow;
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pc = jump_stack[--jsp];
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flags |= FLAG_MATCHED | FLAG_LAST_MATCHED;
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goto next_op;
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default:
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@ -438,7 +456,8 @@ next_op:
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}
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/* Shouldn't reach here */
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pr_err("ASN.1 decoder error: Found reserved opcode (%u)\n", op);
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pr_err("ASN.1 decoder error: Found reserved opcode (%u) pc=%zu\n",
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op, pc);
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return -EBADMSG;
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data_overrun_error:
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@ -666,7 +666,7 @@ struct element {
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unsigned flags;
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#define ELEMENT_IMPLICIT 0x0001
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#define ELEMENT_EXPLICIT 0x0002
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#define ELEMENT_MARKED 0x0004
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#define ELEMENT_TAG_SPECIFIED 0x0004
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#define ELEMENT_RENDERED 0x0008
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#define ELEMENT_SKIPPABLE 0x0010
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#define ELEMENT_CONDITIONAL 0x0020
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@ -879,6 +879,7 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
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element->tag &= ~0x1f;
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element->tag |= strtoul(cursor->value, &p, 10);
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element->flags |= ELEMENT_TAG_SPECIFIED;
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if (p - cursor->value != cursor->size)
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abort();
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cursor++;
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@ -1376,7 +1377,7 @@ static void render_out_of_line_list(FILE *out)
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*/
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static void render_element(FILE *out, struct element *e, struct element *tag)
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{
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struct element *ec;
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struct element *ec, *x;
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const char *cond, *act;
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int entry, skippable = 0, outofline = 0;
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@ -1400,7 +1401,8 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
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act = e->action ? "_ACT" : "";
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switch (e->compound) {
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case ANY:
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render_opcode(out, "ASN1_OP_%sMATCH_ANY%s,", cond, act);
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render_opcode(out, "ASN1_OP_%sMATCH_ANY%s%s,",
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cond, act, skippable ? "_OR_SKIP" : "");
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if (e->name)
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render_more(out, "\t\t// %*.*s",
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(int)e->name->size, (int)e->name->size,
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@ -1435,15 +1437,17 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
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break;
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}
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if (e->name)
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x = tag ?: e;
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if (x->name)
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render_more(out, "\t\t// %*.*s",
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(int)e->name->size, (int)e->name->size,
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e->name->value);
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(int)x->name->size, (int)x->name->size,
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x->name->value);
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render_more(out, "\n");
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/* Render the tag */
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if (!tag)
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if (!tag || !(tag->flags & ELEMENT_TAG_SPECIFIED))
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tag = e;
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if (tag->class == ASN1_UNIV &&
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tag->tag != 14 &&
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tag->tag != 15 &&
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@ -1465,7 +1469,8 @@ dont_render_tag:
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case TYPE_REF:
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render_element(out, e->type->type->element, tag);
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if (e->action)
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render_opcode(out, "ASN1_OP_ACT,\n");
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render_opcode(out, "ASN1_OP_%sACT,\n",
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skippable ? "MAYBE_" : "");
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break;
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case SEQUENCE:
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@ -1539,7 +1544,7 @@ dont_render_tag:
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case CHOICE:
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for (ec = e->children; ec; ec = ec->next)
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render_element(out, ec, NULL);
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render_element(out, ec, ec);
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if (!skippable)
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render_opcode(out, "ASN1_OP_COND_FAIL,\n");
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if (e->action)
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