of: reserved_mem: Fix kmemleak crash on no-map region
Unable to handle kernel paging request at virtual address
[<ffffff849b434d88>] scan_block+0x88/0x170
[<ffffff849b435070>] scan_gray_list+0x18c/0x1c0
[<ffffff849b4352ac>] kmemleak_scan+0x208/0x4b0
[<ffffff849b4359ec>] kmemleak_write+0x338/0x378
[<ffffff849b571068>] full_proxy_write+0x80/0xe4
[<ffffff849b43fe7c>] vfs_write+0xb4/0x1d0
early_init_dt_alloc_reserved_memory_arch() calls memblock_alloc_base(),
which will create a kmemleak entry. Ensure this entry is ignored if
the no-map property is set. This will prevent kmemleak from scanning
the object if there is no kernel mapping for it.
Change-Id: I45f35600ae2aacf0f10f8bcbc956d019b666e4a7
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index c807c28..4a1cab5 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -24,6 +24,7 @@
#include <linux/of_reserved_mem.h>
#include <linux/sort.h>
#include <linux/slab.h>
+#include <linux/kmemleak.h>
#define MAX_RESERVED_REGIONS 32
static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
@@ -54,8 +55,10 @@
}
*res_base = base;
- if (nomap)
+ if (nomap) {
+ kmemleak_ignore_phys(base);
return memblock_remove(base, size);
+ }
return 0;
}
#else