linux-kernel - [lkp] [string] 5f6f0801f5: BUG: KASan: out of bounds access in strlcpy+0xc8/0x250 at addr ffff88011a666ee0

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Date:	Mon, 12 Oct 2015 14:54:03 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Ingo Molnar <mingo@...nel.org>
CC:	0day robot <fengguang.wu@...el.com>
Subject: [lkp] [string] 5f6f0801f5: BUG: KASan: out of bounds access in
 strlcpy+0xc8/0x250 at addr ffff88011a666ee0

FYI, we noticed the below changes on

git://internal_mailing_list_patch_tree Ingo-Molnar/string-Improve-the-generic-strlcpy-implementation
commit 5f6f0801f5fdfce4984c6a14f99dbfbb417acb66 ("string: Improve the generic strlcpy() implementation")


[   22.205482] systemd[1]: RTC configured in localtime, applying delta of 480 minutes to system time.
[   22.214569] random: systemd urandom read with 11 bits of entropy available
[   22.241378] ==================================================================
[   22.242067] BUG: KASan: out of bounds access in strlcpy+0xc8/0x250 at addr ffff88011a666ee0
[   22.242067] Read of size 8 by task systemd/1
[   22.242067] =============================================================================
[   22.242067] BUG kmalloc-64 (Not tainted): kasan: bad access detected
[   22.242067] -----------------------------------------------------------------------------
[   22.242067] 
[   22.242067] Disabling lock debugging due to kernel taint
[   22.242067] INFO: Slab 0xffffea0004699980 objects=64 used=64 fp=0x          (null) flags=0x200000000000080
[   22.242067] INFO: Object 0xffff88011a666ec0 @offset=3776 fp=0x7379732f62696c2f
[   22.242067] 
[   22.242067] Bytes b4 ffff88011a666eb0: 00 00 00 00 00 00 00 00 a7 4b c2 ef 07 00 00 00  .........K......
[   22.242067] Object ffff88011a666ec0: 2f 6c 69 62 2f 73 79 73 74 65 6d 64 2f 73 79 73  /lib/systemd/sys


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Ying Huang

View attachment "config-4.3.0-rc4-00001-g5f6f080" of type "text/plain" (96196 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (32544 bytes)

View attachment "job.yaml" of type "text/plain" (2794 bytes)