The patch titled
Subject: mm: debug: Fix a width vs precision bug in printk
has been added to the -mm tree. Its filename is
mm-print-more-information-about-mapping-in-__dump_page-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-print-more-information-about-mapping-in-__dump_page-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-print-more-information-about-mapping-in-__dump_page-fix.patch
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------------------------------------------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Subject: mm: debug: Fix a width vs precision bug in printk
We had intended to only print dentry->d_name.len characters but there is
a width vs precision typo so if the name isn't NUL terminated it will
read past the end of the buffer.
Link: http://lkml.kernel.org/r/20181123072135.gqvblm2vdujbvfjs@kili.mountain
Fixes: 408ddbc22be3 ("mm: print more information about mapping in __dump_page")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/debug.c~mm-print-more-information-about-mapping-in-__dump_page-fix
+++ a/mm/debug.c
@@ -80,7 +80,7 @@ void __dump_page(struct page *page, cons
if (mapping->host->i_dentry.first) {
struct dentry *dentry;
dentry = container_of(mapping->host->i_dentry.first, struct dentry, d_u.d_alias);
- pr_emerg("name:\"%*s\" ", dentry->d_name.len, dentry->d_name.name);
+ pr_emerg("name:\"%.*s\" ", dentry->d_name.len, dentry->d_name.name);
}
}
BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
_
Patches currently in -mm which might be from dan.carpenter@xxxxxxxxxx are
mm-print-more-information-about-mapping-in-__dump_page-fix.patch
