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MFV r299237: apply two upstream revisions to address upstream bug PR/540.

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PR:		209211
MFC after:	2 weeks
X-MFC:		if there is no new file release
This commit is contained in:
Xin LI 2016-05-08 18:18:35 +00:00
commit 53021c7e30
1 changed files with 42 additions and 22 deletions
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64
contrib/file/src/softmagic.c
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@ -32,7 +32,7 @@
#include "file.h"
#ifndef lint
FILE_RCSID("@(#)$File: softmagic.c,v 1.229 2016/03/21 23:04:40 christos Exp $")
FILE_RCSID("@(#)$File: softmagic.c,v 1.230 2016/04/18 15:10:34 christos Exp $")
#endif /* lint */
#include "magic.h"
@ -186,11 +186,11 @@ match(struct magic_set *ms, struct magic *magic, uint32_t nmagic,
((text && (m->str_flags & FLT) == STRING_BINTEST) ||
(!text && (m->str_flags & FLT) == STRING_TEXTTEST))) ||
(m->flag & mode) != mode) {
flush:
/* Skip sub-tests */
while (magindex + 1 < nmagic &&
magic[magindex + 1].cont_level != 0 &&
++magindex)
continue;
while (magindex < nmagic - 1 &&
magic[magindex + 1].cont_level != 0)
magindex++;
continue; /* Skip to next top-level test*/
}
@ -227,10 +227,7 @@ match(struct magic_set *ms, struct magic *magic, uint32_t nmagic,
* main entry didn't match,
* flush its continuations
*/
while (magindex < nmagic - 1 &&
magic[magindex + 1].cont_level != 0)
magindex++;
continue;
goto flush;
}
if ((e = handle_annotation(ms, m)) != 0) {
@ -255,8 +252,13 @@ match(struct magic_set *ms, struct magic *magic, uint32_t nmagic,
if (print && mprint(ms, m) == -1)
return -1;
if (moffset(ms, m, nbytes, &ms->c.li[cont_level].off) == -1)
return -1;
switch (moffset(ms, m, nbytes, &ms->c.li[cont_level].off)) {
case -1:
case 0:
goto flush;
default:
break;
}
/* and any continuations that match */
if (file_check_mem(ms, ++cont_level) == -1)
@ -362,9 +364,15 @@ match(struct magic_set *ms, struct magic *magic, uint32_t nmagic,
if (print && mprint(ms, m) == -1)
return -1;
if (moffset(ms, m, nbytes,
&ms->c.li[cont_level].off) == -1)
return -1;
switch (moffset(ms, m, nbytes,
&ms->c.li[cont_level].off)) {
case -1:
case 0:
flush = 1;
break;
default:
break;
}
if (*m->desc)
*need_separator = 1;
@ -813,9 +821,13 @@ moffset(struct magic_set *ms, struct magic *m, size_t nbytes, int32_t *op)
case FILE_DER:
{
o = der_offs(ms, m, nbytes);
if (o == -1) {
file_error(ms, 0, "EOF computing DER offset");
return -1;
if (o == -1 || (size_t)o > nbytes) {
if ((ms->flags & MAGIC_DEBUG) != 0) {
(void)fprintf(stderr,
"Bad DER offset %d nbytes=%zu",
o, nbytes);
}
return 0;
}
break;
}
@ -825,12 +837,15 @@ moffset(struct magic_set *ms, struct magic *m, size_t nbytes, int32_t *op)
break;
}
if ((size_t)o >= nbytes) {
file_error(ms, 0, "Offset out of range");
if ((size_t)o > nbytes) {
#if 0
file_error(ms, 0, "Offset out of range %zu > %zu",
(size_t)o, nbytes);
#endif
return -1;
}
*op = o;
return 0;
return 1;
}
private uint32_t
@ -2107,8 +2122,13 @@ magiccheck(struct magic_set *ms, struct magic *m)
return 1;
case FILE_DER:
matched = der_cmp(ms, m);
if (matched == -1)
file_error(ms, 0, "EOF comparing DER entries");
if (matched == -1) {
if ((ms->flags & MAGIC_DEBUG) != 0) {
(void) fprintf(stderr,
"EOF comparing DER entries");
}
return 0;
}
return matched;
default:
file_magerror(ms, "invalid type %d in magiccheck()", m->type);