hash_page() needs to read page tables from kernel memory. When entire
kernel memory is mapped by BATs, which is normally the case when
CONFIG_STRICT_KERNEL_RWX is not set, it works even if the page hosting
the page table is not referenced in the MMU hash table.
However, if the page where the page
Le 15/02/2020 à 07:28, Leonardo Bras a écrit :
On Sun, 2020-02-09 at 18:14 +, Christophe Leroy wrote:
In ITLB miss handled the line supposed to clear bits 20-23 on the
L2 ITLB entry is buggy and does indeed nothing, leading to undefined
value which could allow execution when it shouldn't.
Le 14/02/2020 à 13:47, Christophe Leroy a écrit :
When a program check exception happens while MMU translation is
disabled, following Oops happens in kprobe_handler() in the following
test:
} else if (*addr != BREAKPOINT_INSTRUCTION) {
[ 33.098554] BUG: Unable to handle ker
Hi,
Le 14/02/2020 à 14:54, Masami Hiramatsu a écrit :
Hi,
On Fri, 14 Feb 2020 12:47:49 + (UTC)
Christophe Leroy wrote:
When a program check exception happens while MMU translation is
disabled, following Oops happens in kprobe_handler() in the following
test:
} else if (*
https://bugzilla.kernel.org/show_bug.cgi?id=206525
--- Comment #3 from Christophe Leroy (christophe.le...@c-s.fr) ---
Bug introduced by commit ("cf5bddb95cbe net: bridge: vlan: add rtnetlink group
and notify support")
RTNLGRP_MAX is now 33.
'unsigned long groups' is 32 bits long on PPC32
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