(added Catalin)
On Mon, Oct 11, 2021 at 02:23:31PM +0300, Vladimir Zapolskiy wrote:
> Hello Mike,
>
> commit a7259df767 ("memblock: make memblock_find_in_range method private") [1]
> invokes a kernel panic while running kmemleak on OF platforms with nomaped
> regions, basically it's similar to an issue reported and fixed earlier by [2]:
>
> Unable to handle kernel paging request at virtual address ffff000021e00000
Does this virtual address correspond to a nomap area?
Can you check if this patch helps:
diff --git a/mm/memblock.c b/mm/memblock.c
index 184dcd2e5d99..5c3503c98b2f 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -936,7 +936,12 @@ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
*/
int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size)
{
- return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP);
+ int ret = memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP);
+
+ if (!ret)
+ kmemleak_free_part_phys(base, size);
+
+ return ret;
}
/**
> [...]
> scan_block+0x64/0x170
> scan_gray_list+0xe8/0x17c
> kmemleak_scan+0x270/0x514
> kmemleak_write+0x34c/0x4ac
>
> I believe it would be a trivial problem to correct for you, thank you in
> advance!
>
> [1] https://lore.kernel.org/all/20210816122622.30279-1-rppt@xxxxxxxxxx/T/#u
> [2] https://lore.kernel.org/lkml/20190119132832.GA29881@MBP.local/t/#m032124f36c07
>
> --
> Best wishes,
> Vladimir
--
Sincerely yours,
Mike.
