From: Eric Lin <tesheng@andestech.com>
To: <linux-kernel@vger.kernel.org>, <linux-riscv@lists.infradead.org>,
<walken@google.com>, <vbabka@suse.cz>, <peterx@redhat.com>,
<akpm@linux-foundation.org>, <penberg@kernel.org>,
<aou@eecs.berkeley.edu>, <palmer@dabbelt.com>,
<paul.walmsley@sifive.com>
Cc: Eric Lin <tesheng@andestech.com>
Subject: [PATCH v3 0/2] Let illegal access to user-space memory die
Date: Fri, 4 Dec 2020 13:42:57 +0800 [thread overview]
Message-ID: <20201204054259.32684-1-tesheng@andestech.com> (raw)
Accesses to user-space memory without calling uaccess routine
leads to hanging in page fault handler. Like arm64, we let it
die earlier in page fault handler.
Changes in v3:
-Let no_context() use die_kernel_fault() helper
Changes in v2:
-Add a die_kernel_fault() helper
-Split one long line code into two
Eric Lin (2):
riscv/mm: Introduce a die_kernel_fault() helper function
riscv/mm: Prevent kernel module to access user memory without uaccess
routines
arch/riscv/mm/fault.c | 28 ++++++++++++++++++++++------
1 file changed, 22 insertions(+), 6 deletions(-)
--
2.17.0
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next reply other threads:[~2020-12-04 5:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 5:42 Eric Lin [this message]
2020-12-04 5:42 ` [PATCH v3 1/2] riscv/mm: Introduce a die_kernel_fault() helper function Eric Lin
2020-12-04 5:42 ` [PATCH v3 2/2] riscv/mm: Prevent kernel module to access user memory without uaccess routines Eric Lin
2020-12-18 4:03 ` [PATCH v3 0/2] Let illegal access to user-space memory die Eric Lin
2020-12-22 2:35 ` Palmer Dabbelt
2021-02-01 13:18 ` Ben Dooks
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