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Fix view->base pointer overwrite.

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This commit is contained in:
bruvzg 2025-02-15 22:56:02 +02:00
parent bacab7f822
commit 961207dc6f
2 changed files with 10 additions and 6 deletions
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11
thirdparty/libbacktrace/patches/0001-big-files-support.patch vendored
View file

@ -18,23 +18,26 @@ index 7af66602fd..a7e937667c 100644
{
error_callback (data, "lseek", errno);
return 0;
@@ -74,7 +67,10 @@ backtrace_get_view (struct backtrace_state *state, int descriptor,
@@ -72,9 +65,13 @@ backtrace_get_view (struct backtrace_state *state, int descriptor,
view->len = size;
got = 0;
+ void *ptr = view->base;
while (got < size)
{
- r = read (descriptor, view->base, size - got);
+ uint64_t sz = size - got;
+ if (sz > INT_MAX)
+ sz = INT_MAX;
+ r = _read (descriptor, view->base, sz);
+ r = _read (descriptor, ptr, sz);
if (r < 0)
{
error_callback (data, "read", errno);
@@ -84,6 +80,7 @@ backtrace_get_view (struct backtrace_state *state, int descriptor,
@@ -84,6 +81,7 @@ backtrace_get_view (struct backtrace_state *state, int descriptor,
if (r == 0)
break;
got += (uint64_t) r;
+ view->base += r;
+ ptr += r;
}
if (got < size)

5
thirdparty/libbacktrace/read.c vendored
View file

@ -65,12 +65,13 @@ backtrace_get_view (struct backtrace_state *state, int descriptor,
view->len = size;
got = 0;
void *ptr = view->base;
while (got < size)
{
uint64_t sz = size - got;
if (sz > INT_MAX)
sz = INT_MAX;
r = _read (descriptor, view->base, sz);
r = _read (descriptor, ptr, sz);
if (r < 0)
{
error_callback (data, "read", errno);
@ -80,7 +81,7 @@ backtrace_get_view (struct backtrace_state *state, int descriptor,
if (r == 0)
break;
got += (uint64_t) r;
view->base += r;
ptr += r;
}
if (got < size)