linux-stable/drivers/of
Mike Rapoport 658aafc813 memblock: exclude MEMBLOCK_NOMAP regions from kmemleak
Vladimir Zapolskiy reports:

Commit a7259df767 ("memblock: make memblock_find_in_range method
private") invokes a kernel panic while running kmemleak on OF platforms
with nomaped regions:

  Unable to handle kernel paging request at virtual address fff000021e00000
  [...]
    scan_block+0x64/0x170
    scan_gray_list+0xe8/0x17c
    kmemleak_scan+0x270/0x514
    kmemleak_write+0x34c/0x4ac

The memory allocated from memblock is registered with kmemleak, but if
it is marked MEMBLOCK_NOMAP it won't have linear map entries so an
attempt to scan such areas will fault.

Ideally, memblock_mark_nomap() would inform kmemleak to ignore
MEMBLOCK_NOMAP memory, but it can be called before kmemleak interfaces
operating on physical addresses can use __va() conversion.

Make sure that functions that mark allocated memory as MEMBLOCK_NOMAP
take care of informing kmemleak to ignore such memory.

Link: https://lore.kernel.org/all/8ade5174-b143-d621-8c8e-dc6a1898c6fb@linaro.org
Link: https://lore.kernel.org/all/c30ff0a2-d196-c50d-22f0-bd50696b1205@quicinc.com
Fixes: a7259df767 ("memblock: make memblock_find_in_range method private")
Reported-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Tested-by: Qian Cai <quic_qiancai@quicinc.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-10-21 18:30:49 -10:00
..
unittest-data of: unittest: Statically apply overlays using fdtoverlay 2021-03-23 15:27:51 -06:00
address.c of: Move of_dma_set_restricted_buffer() into device.c 2021-08-23 06:32:02 -04:00
base.c fbdev: simplefb: fix Kconfig dependencies 2021-10-06 11:12:28 +02:00
device.c of: restricted dma: Fix condition for rmem init 2021-09-17 15:58:09 -05:00
dynamic.c of: Add missing 'Return' section in kerneldoc comments 2021-03-27 12:59:03 -06:00
fdt.c of: fdt: Rename reserve_elfcorehdr() to fdt_reserve_elfcorehdr() 2021-08-25 13:13:31 -05:00
fdt_address.c
irq.c of: Add missing 'Return' section in kerneldoc comments 2021-03-27 12:59:03 -06:00
Kconfig of: Drop reserved mem dependency on DMA_DECLARE_COHERENT and DMA_CMA 2021-06-02 20:59:28 -05:00
kexec.c of: kexec: Remove FDT_PROP_* definitions 2021-07-16 14:05:38 -06:00
kobj.c of: Don't allow __of_attached_node_sysfs() without CONFIG_SYSFS 2021-08-23 13:52:09 -05:00
Makefile of: Add a common kexec FDT setup function 2021-03-08 12:06:29 -07:00
of_net.c of: net: fix of_get_mac_addr_nvmem() for non-platform devices 2021-04-13 14:35:02 -07:00
of_numa.c of, numa: Validate some distance map rules 2018-11-08 12:44:34 -06:00
of_private.h of: Move of_dma_set_restricted_buffer() into device.c 2021-08-23 06:32:02 -04:00
of_reserved_mem.c memblock: exclude MEMBLOCK_NOMAP regions from kmemleak 2021-10-21 18:30:49 -10:00
overlay.c of: overlay: Remove redundant assignment to ret 2021-05-03 13:57:56 -05:00
pdt.c of: Remove struct device_node.type pointer 2019-01-10 16:24:44 -06:00
platform.c iommu: Drop unnecessary of_iommu.h includes 2021-06-08 14:15:46 +02:00
property.c Revert "of: property: fw_devlink: Add support for "phy-handle" property" 2021-09-15 08:14:32 -05:00
resolver.c of: overlay: log the error cause on resolver failure 2020-03-02 11:32:44 -06:00
unittest.c of: unittest: Use DEFINE_RES_MEM() to simplify code 2021-06-04 17:29:18 -05:00