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authorCatalin Marinas <catalin.marinas@arm.com>2013-11-12 15:07:45 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-31 12:54:53 -0700
commit7e2e611849fa3786431f86411346ecb70c3f4283 (patch)
tree0112264978b0294d2dadc7d4ab049ea26b0dd230 /net/econet
parentb06b5c6204bdc7c571feedb6b16188ba62feb9a6 (diff)
mm: kmemleak: avoid false negatives on vmalloc'ed objects
commit 7f88f88f83ed609650a01b18572e605ea50cd163 upstream. Commit 248ac0e1943a ("mm/vmalloc: remove guard page from between vmap blocks") had the side effect of making vmap_area.va_end member point to the next vmap_area.va_start. This was creating an artificial reference to vmalloc'ed objects and kmemleak was rarely reporting vmalloc() leaks. This patch marks the vmap_area containing pointers explicitly and reduces the min ref_count to 2 as vm_struct still contains a reference to the vmalloc'ed object. The kmemleak add_scan_area() function has been improved to allow a SIZE_MAX argument covering the rest of the object (for simpler calling sites). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [hq: Backported to 3.4: Adjust context] Signed-off-by: Qiang Huang <h.huangqiang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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