The patch titled
Subject: mm/page_poison: use unhashed address in hexdump for check_poison_mem()
has been added to the -mm tree. Its filename is
mm-page_poison-use-unhashed-address-in-hexdump-for-check_poison_mem.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_poison-use-unhashed-address-in-hexdump-for-check_poison_mem.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_poison-use-unhashed-address-in-hexdump-for-check_poison_mem.patch
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------------------------------------------------------
From: Timur Tabi <timur@xxxxxxxxxx>
Subject: mm/page_poison: use unhashed address in hexdump for check_poison_mem()
Now that print_hex_dump() is capable of printing unhashed addresses, use
that feature in the code that reports memory errors. Hashed addresses
don't tell you where the corrupted page actually is.
Link: https://lkml.kernel.org/r/20210116220950.47078-3-timur@xxxxxxxxxx
Signed-off-by: Timur Tabi <timur@xxxxxxxxxx>
Cc: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: John Ogness <john.ogness@xxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Roman Fietze <roman.fietze@xxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_poison.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/page_poison.c~mm-page_poison-use-unhashed-address-in-hexdump-for-check_poison_mem
+++ a/mm/page_poison.c
@@ -67,7 +67,7 @@ static void check_poison_mem(unsigned ch
else
pr_err("pagealloc: memory corruption\n");
- print_hex_dump(KERN_ERR, "", DUMP_PREFIX_ADDRESS, 16, 1, start,
+ print_hex_dump(KERN_ERR, "", DUMP_PREFIX_UNHASHED, 16, 1, start,
end - start + 1, 1);
dump_stack();
}
_
Patches currently in -mm which might be from timur@xxxxxxxxxx are
lib-hexdump-introduce-dump_prefix_unhashed-for-unhashed-addresses.patch
mm-page_poison-use-unhashed-address-in-hexdump-for-check_poison_mem.patch
