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authorCatalin Marinas <catalin.marinas@arm.com>2016-10-11 13:55:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-11 15:06:33 -0700
commit9099daed9c6991a512c1f74b92ec49daf9408cda (patch)
tree9ebac94f168a0d5d843b715c1d19708d12a1c8c0 /mm/memblock.c
parent0549a3c02efb350776bc869685a361045efd3a29 (diff)
downloadlinux-9099daed9c6991a512c1f74b92ec49daf9408cda.tar.bz2
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
Some of the kmemleak_*() callbacks in memblock, bootmem, CMA convert a physical address to a virtual one using __va(). However, such physical addresses may sometimes be located in highmem and using __va() is incorrect, leading to inconsistent object tracking in kmemleak. The following functions have been added to the kmemleak API and they take a physical address as the object pointer. They only perform the corresponding action if the address has a lowmem mapping: kmemleak_alloc_phys kmemleak_free_part_phys kmemleak_not_leak_phys kmemleak_ignore_phys The affected calling places have been updated to use the new kmemleak API. Link: http://lkml.kernel.org/r/1471531432-16503-1-git-send-email-catalin.marinas@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index c8dfa430342b..7608bc305936 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -723,7 +723,7 @@ int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size)
(unsigned long long)base + size - 1,
(void *)_RET_IP_);
- kmemleak_free_part(__va(base), size);
+ kmemleak_free_part_phys(base, size);
return memblock_remove_range(&memblock.reserved, base, size);
}
@@ -1152,7 +1152,7 @@ static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
* The min_count is set to 0 so that memblock allocations are
* never reported as leaks.
*/
- kmemleak_alloc(__va(found), size, 0, 0);
+ kmemleak_alloc_phys(found, size, 0, 0);
return found;
}
return 0;
@@ -1399,7 +1399,7 @@ void __init __memblock_free_early(phys_addr_t base, phys_addr_t size)
memblock_dbg("%s: [%#016llx-%#016llx] %pF\n",
__func__, (u64)base, (u64)base + size - 1,
(void *)_RET_IP_);
- kmemleak_free_part(__va(base), size);
+ kmemleak_free_part_phys(base, size);
memblock_remove_range(&memblock.reserved, base, size);
}
@@ -1419,7 +1419,7 @@ void __init __memblock_free_late(phys_addr_t base, phys_addr_t size)
memblock_dbg("%s: [%#016llx-%#016llx] %pF\n",
__func__, (u64)base, (u64)base + size - 1,
(void *)_RET_IP_);
- kmemleak_free_part(__va(base), size);
+ kmemleak_free_part_phys(base, size);
cursor = PFN_UP(base);
end = PFN_DOWN(base + size);