|
 |
1d9674 |
From 590f35e773dcd51a750b9a181863660a25b66f01 Mon Sep 17 00:00:00 2001
|
|
|
1d9674 |
From: Petr Tesarik <ptesarik@suse.com>
|
|
|
1d9674 |
Date: Fri, 19 Jan 2018 20:46:19 +0900
|
|
|
1d9674 |
Subject: [PATCH 1/2] [PATCH 1/2] Fix off-by-one errors in exclude_segment()
|
|
|
1d9674 |
|
|
|
1d9674 |
The crashed reserved memory end offset is the last address within
|
|
|
1d9674 |
range, whereas the end offset in the pt_loads[] denotes the first
|
|
|
1d9674 |
address past the range. This has caused a number of off-by-one
|
|
|
1d9674 |
errors in exclude_segment().
|
|
|
1d9674 |
|
|
|
1d9674 |
First, let's unify the meaning of "end" to be the first out-of-range
|
|
|
1d9674 |
address, i.e. start + size. Thanks to that, no +1 or -1 adjustments
|
|
|
1d9674 |
are needed in exclude_segment().
|
|
|
1d9674 |
|
|
|
1d9674 |
Second, since the value read from /proc/iomem is the last address
|
|
|
1d9674 |
within range, add one when passing it as an argument to
|
|
|
1d9674 |
exclude_segment(). This is now the only adjustment by one.
|
|
|
1d9674 |
|
|
|
1d9674 |
Signed-off-by: Petr Tesarik <ptesarik@suse.com>
|
|
|
1d9674 |
Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
|
|
|
1d9674 |
---
|
|
|
1d9674 |
elf_info.c | 18 +++++++++---------
|
|
|
1d9674 |
1 file changed, 9 insertions(+), 9 deletions(-)
|
|
|
1d9674 |
|
|
|
1d9674 |
diff --git a/makedumpfile-1.6.2/elf_info.c b/makedumpfile-1.6.2/elf_info.c
|
|
|
1d9674 |
index 69b1719b020f..1eaddd968826 100644
|
|
|
1d9674 |
--- a/makedumpfile-1.6.2/elf_info.c
|
|
|
1d9674 |
+++ b/makedumpfile-1.6.2/elf_info.c
|
|
|
1d9674 |
@@ -820,26 +820,26 @@ static int exclude_segment(struct pt_load_segment **pt_loads,
|
|
|
1d9674 |
if (kvstart < vend && kvend > vstart) {
|
|
|
1d9674 |
if (kvstart != vstart && kvend != vend) {
|
|
|
1d9674 |
/* Split load segment */
|
|
|
1d9674 |
- temp_seg.phys_start = end + 1;
|
|
|
1d9674 |
+ temp_seg.phys_start = end;
|
|
|
1d9674 |
temp_seg.phys_end = (*pt_loads)[i].phys_end;
|
|
|
1d9674 |
- temp_seg.virt_start = kvend + 1;
|
|
|
1d9674 |
+ temp_seg.virt_start = kvend;
|
|
|
1d9674 |
temp_seg.virt_end = vend;
|
|
|
1d9674 |
temp_seg.file_offset = (*pt_loads)[i].file_offset
|
|
|
1d9674 |
+ temp_seg.virt_start - (*pt_loads)[i].virt_start;
|
|
|
1d9674 |
temp_seg.file_size = temp_seg.phys_end
|
|
|
1d9674 |
- temp_seg.phys_start;
|
|
|
1d9674 |
|
|
|
1d9674 |
- (*pt_loads)[i].virt_end = kvstart - 1;
|
|
|
1d9674 |
- (*pt_loads)[i].phys_end = start - 1;
|
|
|
1d9674 |
+ (*pt_loads)[i].virt_end = kvstart;
|
|
|
1d9674 |
+ (*pt_loads)[i].phys_end = start;
|
|
|
1d9674 |
(*pt_loads)[i].file_size -= temp_seg.file_size;
|
|
|
1d9674 |
|
|
|
1d9674 |
tidx = i+1;
|
|
|
1d9674 |
} else if (kvstart != vstart) {
|
|
|
1d9674 |
- (*pt_loads)[i].phys_end = start - 1;
|
|
|
1d9674 |
- (*pt_loads)[i].virt_end = kvstart - 1;
|
|
|
1d9674 |
+ (*pt_loads)[i].phys_end = start;
|
|
|
1d9674 |
+ (*pt_loads)[i].virt_end = kvstart;
|
|
|
1d9674 |
} else {
|
|
|
1d9674 |
- (*pt_loads)[i].phys_start = end + 1;
|
|
|
1d9674 |
- (*pt_loads)[i].virt_start = kvend + 1;
|
|
|
1d9674 |
+ (*pt_loads)[i].phys_start = end;
|
|
|
1d9674 |
+ (*pt_loads)[i].virt_start = kvend;
|
|
|
1d9674 |
}
|
|
|
1d9674 |
(*pt_loads)[i].file_size -= (end -start);
|
|
|
1d9674 |
}
|
|
|
1d9674 |
@@ -917,7 +917,7 @@ int get_kcore_dump_loads(void)
|
|
|
1d9674 |
|
|
|
1d9674 |
for (i = 0; i < crash_reserved_mem_nr; i++) {
|
|
|
1d9674 |
exclude_segment(&pt_loads, &num_pt_loads,
|
|
|
1d9674 |
- crash_reserved_mem[i].start, crash_reserved_mem[i].end);
|
|
|
1d9674 |
+ crash_reserved_mem[i].start, crash_reserved_mem[i].end + 1);
|
|
|
1d9674 |
}
|
|
|
1d9674 |
|
|
|
1d9674 |
max_file_offset = 0;
|
|
|
1d9674 |
--
|
|
|
1d9674 |
2.7.4
|
|
|
1d9674 |
|