From 9099daed9c6991a512c1f74b92ec49daf9408cda Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Tue, 11 Oct 2016 13:55:11 -0700 Subject: 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 Reported-by: Vignesh R Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memblock.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'mm/memblock.c') 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); -- cgit