From: Qian Cai <quic_qiancai@quicinc.com>
To: Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Mark Rutland <mark.rutland@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>,
Dmitry Vyukov <dvyukov@google.com>,
<linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>,
Valentin Schneider <valentin.schneider@arm.com>
Subject: KASAN + CPU soft-hotplug = stack-out-of-bounds at cpuinfo_store_cpu
Date: Fri, 12 Nov 2021 23:50:16 -0500 [thread overview]
Message-ID: <YY9ECKyPtDbD9q8q@qian-HP-Z2-SFF-G5-Workstation> (raw)
FYI, running CPU soft-hotplug with KASAN on arm64 defconfig will
always trigger a stack-out-of-bounds below. I am not right sure where
exactly KASAN pointed at, so I am just doing the brute-force
bisect. The progress so far:
# git bisect log
git bisect start
# bad: [e73f0f0ee7541171d89f2e2491130c7771ba58d3] Linux 5.14-rc1
git bisect bad e73f0f0ee7541171d89f2e2491130c7771ba58d3
# good: [62fb9874f5da54fdb243003b386128037319b219] Linux 5.13
git bisect good 62fb9874f5da54fdb243003b386128037319b219
# bad: [e058a84bfddc42ba356a2316f2cf1141974625c9] Merge tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm
git bisect bad e058a84bfddc42ba356a2316f2cf1141974625c9
# bad: [a6eaf3850cb171c328a8b0db6d3c79286a1eba9d] Merge tag 'sched-urgent-2021-06-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad a6eaf3850cb171c328a8b0db6d3c79286a1eba9d
# bad: [31e798fd6f0ff0acdc49c1a358b581730936a09a] Merge tag 'media/v5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
git bisect bad 31e798fd6f0ff0acdc49c1a358b581730936a09a
I am going to test the "arm64-upstream" merge request next which has
some interesting arm64/cpuinfo patches.
BUG: KASAN: stack-out-of-bounds in vsnprintf
Read of size 8 at addr ffff800016297db8 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.0-next-20211110 #157
Hardware name: MiTAC RAPTOR EV-883832-X3-0001/RAPTOR, BIOS 1.6 06/28/2020
Call trace:
dump_backtrace
show_stack
dump_stack_lvl
print_address_description.constprop.0
kasan_report
__asan_report_load8_noabort
vsnprintf
vsnprintf at /root/linux-next/lib/vsprintf.c:2807
vprintk_store
vprintk_store at /root/linux-next/kernel/printk/printk.c:2138 (discriminator 5)
vprintk_emit
vprintk_emit at /root/linux-next/kernel/printk/printk.c:2232
vprintk_default
vprintk_default at /root/linux-next/kernel/printk/printk.c:2260
vprintk
vprintk at /root/linux-next/kernel/printk/printk_safe.c:50
_printk
printk at /root/linux-next/kernel/printk/printk.c:2264
__cpuinfo_store_cpu
__cpuinfo_store_cpu at /root/linux-next/arch/arm64/kernel/cpuinfo.c:412
cpuinfo_store_cpu
cpuinfo_store_cpu at /root/linux-next/arch/arm64/kernel/cpuinfo.c:418
secondary_start_kernel
secondary_start_kernel at /root/linux-next/arch/arm64/kernel/smp.c:241
__secondary_switched
addr ffff800016297db8 is located in stack of task swapper/0/0 at offset 136 in frame:
_printk
this frame has 1 object:
[32, 64) 'args'
Memory state around the buggy address:
ffff800016297c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff800016297d00: 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 f3 f3
>ffff800016297d80: f3 f3 00 00 00 00 f3 f3 00 00 00 00 00 00 00 00
^
ffff800016297e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff800016297e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-11-13 4:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-13 4:50 Qian Cai [this message]
2021-11-13 6:07 ` KASAN + CPU soft-hotplug = stack-out-of-bounds at cpuinfo_store_cpu Qian Cai
2021-11-13 6:49 ` Dmitry Vyukov
2021-11-15 13:29 ` Qian Cai
2021-11-15 10:44 ` Mark Rutland
2021-11-15 13:50 ` Mark Rutland
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=YY9ECKyPtDbD9q8q@qian-HP-Z2-SFF-G5-Workstation \
--to=quic_qiancai@quicinc.com \
--cc=catalin.marinas@arm.com \
--cc=dvyukov@google.com \
--cc=kasan-dev@googlegroups.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=valentin.schneider@arm.com \
--cc=will@kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).