| https://sourceware.org/PR24103 |
| https://bugs.gentoo.org/676794 |
| |
| From da5c5336a1eaf519de246f7d9f0f5585e1d4ac59 Mon Sep 17 00:00:00 2001 |
| From: Mark Wielaard <mark@klomp.org> |
| Date: Sun, 20 Jan 2019 23:05:56 +0100 |
| Subject: [PATCH] libdwfl: Sanity check partial core file dyn data read. |
| |
| When reading the dyn data from the core file check if we got everything, |
| or just part of the data. |
| |
| https://sourceware.org/bugzilla/show_bug.cgi?id=24103 |
| |
| Signed-off-by: Mark Wielaard <mark@klomp.org> |
| --- |
| libdwfl/dwfl_segment_report_module.c | 6 ++++++ |
| |
| --- a/libdwfl/dwfl_segment_report_module.c |
| +++ b/libdwfl/dwfl_segment_report_module.c |
| @@ -783,6 +783,12 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name, |
| if (dyn_filesz != 0 && dyn_filesz % dyn_entsize == 0 |
| && ! read_portion (&dyn_data, &dyn_data_size, dyn_vaddr, dyn_filesz)) |
| { |
| + /* dyn_data_size will be zero if we got everything from the initial |
| + buffer, otherwise it will be the size of the new buffer that |
| + could be read. */ |
| + if (dyn_data_size != 0) |
| + dyn_filesz = dyn_data_size; |
| + |
| void *dyns = malloc (dyn_filesz); |
| Elf32_Dyn (*d32)[dyn_filesz / sizeof (Elf32_Dyn)] = dyns; |
| Elf64_Dyn (*d64)[dyn_filesz / sizeof (Elf64_Dyn)] = dyns; |
| -- |
| 2.20.1 |
