From: kbuild test robot <lkp@intel.com>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: kbuild-all@01.org, Russell King <linux@armlinux.org.uk>,
Wang Nan <wangnan0@huawei.com>, Will Deacon <will.deacon@arm.com>,
Jon Medhurst <tixy@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, mhiramat@kernel.org,
David Long <dave.long@linaro.org>
Subject: Re: [PATCH 2/2] arm: kprobes: Prohibit kprobes on get_user functions
Date: Sun, 25 Feb 2018 18:09:44 +0800 [thread overview]
Message-ID: <201802251710.fJ5muILY%fengguang.wu@intel.com> (raw)
In-Reply-To: <151945939903.11045.1486072728379559979.stgit@devbox>
[-- Attachment #1: Type: text/plain, Size: 4724 bytes --]
Hi Masami,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.16-rc2 next-20180223]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/arm-kprobes-Prohibit-kprobes-on-do_undefinstr/20180225-151050
config: arm-ixp4xx_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm
All errors (new ones prefixed by >>):
arch/arm/lib/getuser.S: Assembler messages:
arch/arm/lib/getuser.S:41: Error: bad instruction `_asm_nokprobe(__get_user_1)'
arch/arm/lib/getuser.S:62: Error: bad instruction `_asm_nokprobe(__get_user_2)'
arch/arm/lib/getuser.S:70: Error: bad instruction `_asm_nokprobe(__get_user_4)'
arch/arm/lib/getuser.S:84: Error: bad instruction `_asm_nokprobe(__get_user_8)'
>> arch/arm/lib/getuser.S:98: Error: bad instruction `_asm_nokprobe(__get_user_32t_8)'
>> arch/arm/lib/getuser.S:106: Error: bad instruction `_asm_nokprobe(__get_user_64t_1)'
>> arch/arm/lib/getuser.S:123: Error: bad instruction `_asm_nokprobe(__get_user_64t_2)'
>> arch/arm/lib/getuser.S:131: Error: bad instruction `_asm_nokprobe(__get_user_64t_4)'
arch/arm/lib/getuser.S:142: Error: bad instruction `_asm_nokprobe(__get_user_bad)'
arch/arm/lib/getuser.S:143: Error: bad instruction `_asm_nokprobe(__get_user_bad8)'
vim +98 arch/arm/lib/getuser.S
34
35 ENTRY(__get_user_1)
36 check_uaccess r0, 1, r1, r2, __get_user_bad
37 1: TUSER(ldrb) r2, [r0]
38 mov r0, #0
39 ret lr
40 ENDPROC(__get_user_1)
> 41 _ASM_NOKPROBE(__get_user_1)
42
43 ENTRY(__get_user_2)
44 check_uaccess r0, 2, r1, r2, __get_user_bad
45 #ifdef CONFIG_CPU_USE_DOMAINS
46 rb .req ip
47 2: ldrbt r2, [r0], #1
48 3: ldrbt rb, [r0], #0
49 #else
50 rb .req r0
51 2: ldrb r2, [r0]
52 3: ldrb rb, [r0, #1]
53 #endif
54 #ifndef __ARMEB__
55 orr r2, r2, rb, lsl #8
56 #else
57 orr r2, rb, r2, lsl #8
58 #endif
59 mov r0, #0
60 ret lr
61 ENDPROC(__get_user_2)
62 _ASM_NOKPROBE(__get_user_2)
63
64 ENTRY(__get_user_4)
65 check_uaccess r0, 4, r1, r2, __get_user_bad
66 4: TUSER(ldr) r2, [r0]
67 mov r0, #0
68 ret lr
69 ENDPROC(__get_user_4)
70 _ASM_NOKPROBE(__get_user_4)
71
72 ENTRY(__get_user_8)
73 check_uaccess r0, 8, r1, r2, __get_user_bad8
74 #ifdef CONFIG_THUMB2_KERNEL
75 5: TUSER(ldr) r2, [r0]
76 6: TUSER(ldr) r3, [r0, #4]
77 #else
78 5: TUSER(ldr) r2, [r0], #4
79 6: TUSER(ldr) r3, [r0]
80 #endif
81 mov r0, #0
82 ret lr
83 ENDPROC(__get_user_8)
84 _ASM_NOKPROBE(__get_user_8)
85
86 #ifdef __ARMEB__
87 ENTRY(__get_user_32t_8)
88 check_uaccess r0, 8, r1, r2, __get_user_bad
89 #ifdef CONFIG_CPU_USE_DOMAINS
90 add r0, r0, #4
91 7: ldrt r2, [r0]
92 #else
93 7: ldr r2, [r0, #4]
94 #endif
95 mov r0, #0
96 ret lr
97 ENDPROC(__get_user_32t_8)
> 98 _ASM_NOKPROBE(__get_user_32t_8)
99
100 ENTRY(__get_user_64t_1)
101 check_uaccess r0, 1, r1, r2, __get_user_bad8
102 8: TUSER(ldrb) r3, [r0]
103 mov r0, #0
104 ret lr
105 ENDPROC(__get_user_64t_1)
> 106 _ASM_NOKPROBE(__get_user_64t_1)
107
108 ENTRY(__get_user_64t_2)
109 check_uaccess r0, 2, r1, r2, __get_user_bad8
110 #ifdef CONFIG_CPU_USE_DOMAINS
111 rb .req ip
112 9: ldrbt r3, [r0], #1
113 10: ldrbt rb, [r0], #0
114 #else
115 rb .req r0
116 9: ldrb r3, [r0]
117 10: ldrb rb, [r0, #1]
118 #endif
119 orr r3, rb, r3, lsl #8
120 mov r0, #0
121 ret lr
122 ENDPROC(__get_user_64t_2)
> 123 _ASM_NOKPROBE(__get_user_64t_2)
124
125 ENTRY(__get_user_64t_4)
126 check_uaccess r0, 4, r1, r2, __get_user_bad8
127 11: TUSER(ldr) r3, [r0]
128 mov r0, #0
129 ret lr
130 ENDPROC(__get_user_64t_4)
> 131 _ASM_NOKPROBE(__get_user_64t_4)
132 #endif
133
134 __get_user_bad8:
135 mov r3, #0
136 __get_user_bad:
137 mov r2, #0
138 mov r0, #-EFAULT
139 ret lr
140 ENDPROC(__get_user_bad)
141 ENDPROC(__get_user_bad8)
142 _ASM_NOKPROBE(__get_user_bad)
143 _ASM_NOKPROBE(__get_user_bad8)
144
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 19581 bytes --]
next prev parent reply other threads:[~2018-02-25 10:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-24 8:02 [PATCH 1/2] arm: kprobes: Prohibit kprobes on do_undefinstr Masami Hiramatsu
2018-02-24 8:03 ` [PATCH 2/2] arm: kprobes: Prohibit kprobes on get_user functions Masami Hiramatsu
2018-02-25 10:09 ` kbuild test robot [this message]
2018-02-25 10:12 ` kbuild test robot
2018-02-25 12:21 ` Masami Hiramatsu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=201802251710.fJ5muILY%fengguang.wu@intel.com \
--to=lkp@intel.com \
--cc=dave.long@linaro.org \
--cc=kbuild-all@01.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mhiramat@kernel.org \
--cc=tixy@linaro.org \
--cc=wangnan0@huawei.com \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox