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Date: Tue, 20 Mar 2018 04:43:16 +0800
From: kbuild test robot <lkp@...el.com>
To: Abbott Liu <liuwenliang@...wei.com>
Cc: kbuild-all@...org, linux@...linux.org.uk, aryabinin@...tuozzo.com,
marc.zyngier@....com, kstewart@...uxfoundation.org,
gregkh@...uxfoundation.org, f.fainelli@...il.com,
liuwenliang@...wei.com, akpm@...ux-foundation.org,
afzal.mohd.ma@...il.com, alexander.levin@...izon.com,
glider@...gle.com, dvyukov@...gle.com, christoffer.dall@...aro.org,
linux@...musvillemoes.dk, mawilcox@...rosoft.com,
pombredanne@...b.com, ard.biesheuvel@...aro.org,
vladimir.murzin@....com, nicolas.pitre@...aro.org,
tglx@...utronix.de, thgarnie@...gle.com, dhowells@...hat.com,
keescook@...omium.org, arnd@...db.de, geert@...ux-m68k.org,
tixy@...aro.org, mark.rutland@....com, james.morse@....com,
zhichao.huang@...aro.org, jinb.park7@...il.com, labbott@...hat.com,
philip@....systems, grygorii.strashko@...aro.org,
catalin.marinas@....com, opendmb@...il.com,
kirill.shutemov@...ux.intel.com,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
kasan-dev@...glegroups.com, kvmarm@...ts.cs.columbia.edu,
linux-mm@...ck.org
Subject: Re: [PATCH 7/7] Enable KASan for arm
Hi Andrey,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.16-rc6]
[cannot apply to next-20180319]
[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/Abbott-Liu/KASan-for-arm/20180319-120138
config: arm-allmodconfig (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/kernel/entry-common.S: Assembler messages:
>> arch/arm/kernel/entry-common.S:85: Error: invalid constant (ffffffffb6e00000) after fixup
vim +85 arch/arm/kernel/entry-common.S
^1da177e4 Linus Torvalds 2005-04-16 68
3302caddf Russell King 2015-08-20 69 /* Ok, we need to do extra processing, enter the slow path. */
^1da177e4 Linus Torvalds 2005-04-16 70 fast_work_pending:
^1da177e4 Linus Torvalds 2005-04-16 71 str r0, [sp, #S_R0+S_OFF]! @ returned r0
3302caddf Russell King 2015-08-20 72 /* fall through to work_pending */
3302caddf Russell King 2015-08-20 73 #else
3302caddf Russell King 2015-08-20 74 /*
3302caddf Russell King 2015-08-20 75 * The "replacement" ret_fast_syscall for when tracing or context tracking
3302caddf Russell King 2015-08-20 76 * is enabled. As we will need to call out to some C functions, we save
3302caddf Russell King 2015-08-20 77 * r0 first to avoid needing to save registers around each C function call.
3302caddf Russell King 2015-08-20 78 */
3302caddf Russell King 2015-08-20 79 ret_fast_syscall:
3302caddf Russell King 2015-08-20 80 UNWIND(.fnstart )
3302caddf Russell King 2015-08-20 81 UNWIND(.cantunwind )
3302caddf Russell King 2015-08-20 82 str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
3302caddf Russell King 2015-08-20 83 disable_irq_notrace @ disable interrupts
e33f8d326 Thomas Garnier 2017-09-07 84 ldr r2, [tsk, #TI_ADDR_LIMIT]
e33f8d326 Thomas Garnier 2017-09-07 @85 cmp r2, #TASK_SIZE
e33f8d326 Thomas Garnier 2017-09-07 86 blne addr_limit_check_failed
3302caddf Russell King 2015-08-20 87 ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
2404269bc Thomas Garnier 2017-09-07 88 tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
3302caddf Russell King 2015-08-20 89 beq no_work_pending
3302caddf Russell King 2015-08-20 90 UNWIND(.fnend )
3302caddf Russell King 2015-08-20 91 ENDPROC(ret_fast_syscall)
3302caddf Russell King 2015-08-20 92
3302caddf Russell King 2015-08-20 93 /* Slower path - fall through to work_pending */
3302caddf Russell King 2015-08-20 94 #endif
3302caddf Russell King 2015-08-20 95
3302caddf Russell King 2015-08-20 96 tst r1, #_TIF_SYSCALL_WORK
3302caddf Russell King 2015-08-20 97 bne __sys_trace_return_nosave
3302caddf Russell King 2015-08-20 98 slow_work_pending:
^1da177e4 Linus Torvalds 2005-04-16 99 mov r0, sp @ 'regs'
^1da177e4 Linus Torvalds 2005-04-16 100 mov r2, why @ 'syscall'
0a267fa6a Al Viro 2012-07-19 101 bl do_work_pending
662852178 Al Viro 2012-07-19 102 cmp r0, #0
81783786d Al Viro 2012-07-19 103 beq no_work_pending
662852178 Al Viro 2012-07-19 104 movlt scno, #(__NR_restart_syscall - __NR_SYSCALL_BASE)
81783786d Al Viro 2012-07-19 105 ldmia sp, {r0 - r6} @ have to reload r0 - r6
81783786d Al Viro 2012-07-19 106 b local_restart @ ... and off we go
e83dd3770 Drew Richardson 2015-08-06 107 ENDPROC(ret_fast_syscall)
81783786d Al Viro 2012-07-19 108
:::::: The code at line 85 was first introduced by commit
:::::: e33f8d32677fa4f4f8996ef46748f86aac81ccff arm/syscalls: Optimize address limit check
:::::: TO: Thomas Garnier <thgarnie@...gle.com>
:::::: CC: Thomas Gleixner <tglx@...utronix.de>
---
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