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* grub-core/lib/relocator.c (malloc_in_range): Fix a memory corruption 

when handling leftovers.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-06-27 12:18:44 +02:00
parent b28c56559b
commit bdea379833
2 changed files with 12 additions and 6 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2011-06-27 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/lib/relocator.c (malloc_in_range): Fix a memory corruption
when handling leftovers.
2011-06-27 Vladimir Serbinenko <phcoder@gmail.com>
* util/ieee1275/grub-ofpathname.c (main): Handle --help and --version

13
grub-core/lib/relocator.c
View File

@ -764,6 +764,9 @@ malloc_in_range (struct grub_relocator *rel,
int inreg = 0, regbeg = 0, ncol = 0;
#if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS
int fwin = 0, fwb = 0, fwlefto = 0;
#endif
#if GRUB_RELOCATOR_HAVE_LEFTOVERS
int last_lo = 0;
#endif
int last_start = 0;
for (j = 0; j < N; j++)
@ -855,7 +858,7 @@ malloc_in_range (struct grub_relocator *rel,
unsigned offend = alloc_end
% GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT;
struct grub_relocator_fw_leftover *lo
= events[last_start].leftover;
= events[last_lo].leftover;
lo->freebytes[offstart / 8]
&= ((1 << (8 - (start % 8))) - 1);
grub_memset (lo->freebytes + (offstart + 7) / 8, 0,
@ -910,6 +913,7 @@ malloc_in_range (struct grub_relocator *rel,
#if GRUB_RELOCATOR_HAVE_LEFTOVERS
case REG_LEFTOVER_START:
fwlefto++;
last_lo = j;
break;
case REG_LEFTOVER_END:
@ -1009,7 +1013,8 @@ malloc_in_range (struct grub_relocator *rel,
curschu->extra = ne;
}
}
#if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS
#if GRUB_RELOCATOR_HAVE_LEFTOVERS
if (!oom && typepre == CHUNK_TYPE_FIRMWARE)
{
grub_addr_t fstart, fend;
@ -1021,7 +1026,6 @@ malloc_in_range (struct grub_relocator *rel,
= ALIGN_UP (alloc_end,
GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT);
#if GRUB_RELOCATOR_HAVE_LEFTOVERS
{
struct grub_relocator_fw_leftover *lo1 = NULL;
struct grub_relocator_fw_leftover *lo2 = NULL;
@ -1081,10 +1085,8 @@ malloc_in_range (struct grub_relocator *rel,
curschu->pre = lo1;
curschu->post = lo2;
}
#endif
}
#if GRUB_RELOCATOR_HAVE_LEFTOVERS
if (typepre == CHUNK_TYPE_LEFTOVER)
{
curschu->pre = events[last_start].leftover;
@ -1092,7 +1094,6 @@ malloc_in_range (struct grub_relocator *rel,
}
#endif
#endif
if (!oom)
cural++;
else