Patchwork [kexec-tools,v2] ppc64: always check number of ranges when adding them

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Submitter Milton Miller
Date Jan. 8, 2009, 12:33 p.m.
Message ID <1231418030_141769@mercury.realtime.net>
Download mbox | patch
Permalink /patch/17352/
State Not Applicable, archived
Headers show

Comments

Milton Miller - Jan. 8, 2009, 12:33 p.m.
make the idom "always call realloc_memory_ranges when filling a range entry"

kexec was core dumping after using 5 exclude_range pairs when only 3
were allocated.

also delcare realloc_memory_ranges to take void.

Signed-off-by: Milton Miller <miltonm@bga.com>
---
v2:  compare variable j not i in a spot noticed by  Michael Ellerman

Patch

Index: kexec-tools/kexec/arch/ppc64/kexec-ppc64.c
===================================================================
--- kexec-tools.orig/kexec/arch/ppc64/kexec-ppc64.c	2009-01-08 01:21:43.000000000 -0600
+++ kexec-tools/kexec/arch/ppc64/kexec-ppc64.c	2009-01-08 01:22:33.000000000 -0600
@@ -96,7 +96,7 @@  err1:
 
 }
 
-static int realloc_memory_ranges()
+static int realloc_memory_ranges(void)
 {
 	size_t memory_range_len;
 
@@ -469,6 +469,8 @@  static int get_devtree_details(unsigned 
 				exclude_range[i].start = initrd_start;
 				exclude_range[i].end = initrd_end;
 				i++;
+				if (i >= max_memory_ranges)
+					realloc_memory_ranges();
 			}
 		} /* chosen */
 
@@ -581,6 +583,8 @@  static int get_devtree_details(unsigned 
 			exclude_range[i].start = tce_base;
 			exclude_range[i].end = tce_base + tce_size;
 			i++;
+			if (i >= max_memory_ranges)
+				realloc_memory_ranges();
 			if (kexec_flags & KEXEC_ON_CRASH)
 				add_usable_mem_rgns(tce_base, tce_size);
 			closedir(cdir);
@@ -634,6 +638,8 @@  int setup_memory_ranges(unsigned long ke
 				memory_range[j].end = exclude_range[i].start - 1;
 				memory_range[j].type = RANGE_RAM;
 				j++;
+				if (j >= max_memory_ranges)
+					realloc_memory_ranges();
 			}
 		} /* i == 0 */
 		/* If the last exclude range does not end at memory_max, include
@@ -646,6 +652,8 @@  int setup_memory_ranges(unsigned long ke
 				memory_range[j].end = memory_max;
 				memory_range[j].type = RANGE_RAM;
 				j++;
+				if (j >= max_memory_ranges)
+					realloc_memory_ranges();
 				/* Limit the end to rmo_top */
 				if (memory_range[j-1].start >= rmo_top) {
 					j--;
@@ -666,6 +674,8 @@  int setup_memory_ranges(unsigned long ke
 		memory_range[j].end = exclude_range[i+1].start - 1;
 		memory_range[j].type = RANGE_RAM;
 		j++;
+		if (j >= max_memory_ranges)
+			realloc_memory_ranges();
 		/* Limit range to rmo_top */
 		if (memory_range[j-1].start >= rmo_top) {
 			j--;