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Liao Chang f4c8fc775f riscv/kprobe: Fix instruction simulation of JALR [ Upstream commit `ca0254998b` ] Set kprobe at 'jalr 1140(ra)' of vfs_write results in the following crash: [ 32.092235] Unable to handle kernel access to user memory without uaccess routines at virtual address 00aaaaaad77b1170 [ 32.093115] Oops [#1] [ 32.093251] Modules linked in: [ 32.093626] CPU: 0 PID: 135 Comm: ftracetest Not tainted 6.2.0-rc2-00013-gb0aa5e5df0cb-dirty #16 [ 32.093985] Hardware name: riscv-virtio,qemu (DT) [ 32.094280] epc : ksys_read+0x88/0xd6 [ 32.094855] ra : ksys_read+0xc0/0xd6 [ 32.095016] epc : ffffffff801cda80 ra : ffffffff801cdab8 sp : ff20000000d7bdc0 [ 32.095227] gp : ffffffff80f14000 tp : ff60000080f9cb40 t0 : ffffffff80f13e80 [ 32.095500] t1 : ffffffff8000c29c t2 : ffffffff800dbc54 s0 : ff20000000d7be60 [ 32.095716] s1 : 0000000000000000 a0 : ffffffff805a64ae a1 : ffffffff80a83708 [ 32.095921] a2 : ffffffff80f160a0 a3 : 0000000000000000 a4 : f229b0afdb165300 [ 32.096171] a5 : f229b0afdb165300 a6 : ffffffff80eeebd0 a7 : 00000000000003ff [ 32.096411] s2 : ff6000007ff76800 s3 : fffffffffffffff7 s4 : 00aaaaaad77b1170 [ 32.096638] s5 : ffffffff80f160a0 s6 : ff6000007ff76800 s7 : 0000000000000030 [ 32.096865] s8 : 00ffffffc3d97be0 s9 : 0000000000000007 s10: 00aaaaaad77c9410 [ 32.097092] s11: 0000000000000000 t3 : ffffffff80f13e48 t4 : ffffffff8000c29c [ 32.097317] t5 : ffffffff8000c29c t6 : ffffffff800dbc54 [ 32.097505] status: 0000000200000120 badaddr: 00aaaaaad77b1170 cause: 000000000000000d [ 32.098011] [<ffffffff801cdb72>] ksys_write+0x6c/0xd6 [ 32.098222] [<ffffffff801cdc06>] sys_write+0x2a/0x38 [ 32.098405] [<ffffffff80003c76>] ret_from_syscall+0x0/0x2 Since the rs1 and rd might be the same one, such as 'jalr 1140(ra)', hence it requires obtaining the target address from rs1 followed by updating rd. Fixes: `c22b0bcb1d` ("riscv: Add kprobes supported") Signed-off-by: Liao Chang <liaochang1@huawei.com> Reviewed-by: Guo Ren <guoren@kernel.org> Link: https://lore.kernel.org/r/20230116064342.2092136-1-liaochang1@huawei.com [Palmer: Pick Guo's cleanup] Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-02-01 08:34:47 +01:00
arch	riscv/kprobe: Fix instruction simulation of JALR	2023-02-01 08:34:47 +01:00
block	block: mq-deadline: Rename deadline_is_seq_writes()	2023-01-24 07:24:44 +01:00
certs	certs: make system keyring depend on built-in x509 parser	2022-09-24 04:31:18 +09:00
crypto	crypto: tcrypt - Fix multibuffer skcipher speed test mem leak	2022-12-31 13:32:34 +01:00
Documentation	regulator: dt-bindings: samsung,s2mps14: add lost samsung,ext-control-gpios	2023-02-01 08:34:39 +01:00
drivers	ACPI: video: Fix apple gmux detection	2023-02-01 08:34:46 +01:00
fs	ovl: fail on invalid uid/gid mapping at copy up	2023-02-01 08:34:38 +01:00
include	platform/x86: apple-gmux: Add apple_gmux_detect() helper	2023-02-01 08:34:46 +01:00
init	gcc: disable -Warray-bounds for gcc-11 too	2023-01-14 10:33:43 +01:00
io_uring	io_uring: always prep_async for drain requests	2023-02-01 08:34:42 +01:00
ipc	ipc: fix memory leak in init_mqueue_fs()	2022-12-31 13:32:01 +01:00
kernel	tracing/osnoise: Use built-in RCU list checking	2023-02-01 08:34:46 +01:00
lib	netlink: prevent potential spectre v1 gadgets	2023-02-01 08:34:43 +01:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	panic: Consolidate open-coded panic_on_warn checks	2023-01-24 07:24:41 +01:00
net	sctp: fail if no bound addresses can be used for a given scope	2023-02-01 08:34:46 +01:00
rust	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
samples	ftrace: Export ftrace_free_filter() to modules	2023-02-01 08:34:37 +01:00
scripts	ftrace/scripts: Update the instructions for ftrace-bisect.sh	2023-02-01 08:34:37 +01:00
security	tomoyo: fix broken dependency on *.conf.default	2023-02-01 08:34:06 +01:00
sound	ASoC: fsl-asoc-card: Fix naming of AC'97 CODEC widgets	2023-02-01 08:34:31 +01:00
tools	Revert "selftests/bpf: check null propagation only neither reg is PTR_TO_BTF_ID"	2023-02-01 08:34:34 +01:00
usr	usr/gen_init_cpio.c: remove unnecessary -1 values from int file	2022-10-03 14:21:44 -07:00
virt	kvm/vfio: Fix potential deadlock on vfio group_lock	2023-02-01 08:34:36 +01:00
.clang-format	inet: ping: use hlist_nulls rcu iterator during lookup	2022-12-01 12:42:46 +01:00
.cocciconfig
.get_maintainer.ignore	get_maintainer: add Alan to .get_maintainer.ignore	2022-08-20 15:17:44 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
.mailmap	9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address	2022-12-10 17:10:52 -08:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Remove Michal Marek from Kbuild maintainers	2022-11-16 14:53:00 +09:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	panic: Expose "warn_count" to sysfs	2023-01-24 07:24:41 +01:00
Makefile	kbuild: fix 'make modules' error when CONFIG_DEBUG_INFO_BTF_MODULES=y	2023-02-01 08:34:08 +01:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.