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Re: [tor-bugs] #18171 [Tor Browser]: Dlls brokenness with Windows10 Build 14251
#18171: Dlls brokenness with Windows10 Build 14251
-------------------------------------------------+-------------------------
Reporter: Coh_t | Owner: tbb-
Type: defect | team
Priority: High | Status: closed
Component: Tor Browser | Milestone:
Severity: Major | Version:
Keywords: borkenward-compatibility loneliness | Resolution: fixed
bug-no-bounty tbb-crash TorBrowserTeam201602 | Actual Points:
Parent ID: | Points:
Sponsor: |
-------------------------------------------------+-------------------------
Comment (by cypherpunks):
Mingw need such checks if not planning to restore some fallback:
{{{
--- pseudo-reloc.c
+++ pseudo-reloc.assert.c
@@ -178,60 +178,70 @@
static void
mark_section_writable (LPVOID addr)
{
MEMORY_BASIC_INFORMATION b;
PIMAGE_SECTION_HEADER h;
int i;
for (i = 0; i < maxSections; i++)
{
if (the_secs[i].sec_start <= ((LPBYTE) addr)
&& ((LPBYTE) addr) < (the_secs[i].sec_start +
the_secs[i].hash->Misc.VirtualSize))
return;
}
h = __mingw_GetSectionForAddress (addr);
if (!h)
{
__report_error ("Address %p has no image-section", addr);
return;
}
the_secs[i].hash = h;
the_secs[i].old_protect = 0;
the_secs[i].sec_start = _GetPEImageBase () + h->VirtualAddress;
if (!VirtualQuery (the_secs[i].sec_start, &b, sizeof(b)))
{
__report_error (" VirtualQuery failed for %d bytes at address %p",
(int) h->Misc.VirtualSize, the_secs[i].sec_start);
return;
}
+ if ((PBYTE)b.BaseAddress + b.RegionSize <
+ the_secs[i].sec_start + the_secs[i].hash->Misc.VirtualSize)
+ {
+ __report_error (" VirtualQuery returned too small region: "
+ "BaseAddress = %p, RegionSize = %u. For section: "
+ "sec_start = %p, size = %u", b.BaseAddress,
+ (unsigned int) b.RegionSize, the_secs[i].sec_start,
+ (unsigned int) the_secs[i].hash->Misc.VirtualSize);
+ return;
+ }
if (b.Protect != PAGE_EXECUTE_READWRITE && b.Protect != PAGE_READWRITE
&& b.Protect != PAGE_EXECUTE_WRITECOPY && b.Protect !=
PAGE_WRITECOPY)
{
if (!VirtualProtect (b.BaseAddress, b.RegionSize,
PAGE_EXECUTE_READWRITE,
&the_secs[i].old_protect))
__report_error (" VirtualProtect failed with code 0x%x",
(int) GetLastError ());
}
++maxSections;
return;
}
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18171#comment:98>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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