luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mm/sparse: more checks on mem_section number

Browse Source 
__section_nr() was implemented to retrieve the corresponding memory
section number according to its descriptor.  It's possible that the
specified memory section descriptor doesn't exist in the global array.  So
add more checking on that and report an error for a wrong case.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gavin Shan 2012-07-31 16:46:04 -07:00 committed by Linus Torvalds
parent 5b760e64a6
commit db36a46113
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
mm/sparse.c
View File

@ -130,6 +130,8 @@ int __section_nr(struct mem_section* ms)
break;
}
VM_BUG_ON(root_nr == NR_SECTION_ROOTS);
return (root_nr * SECTIONS_PER_ROOT) + (ms - root);
}