[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ff5ad474-6d32-8bf8-e297-ed71a967d27c@icdsoft.com>
Date: Tue, 29 Nov 2022 13:19:41 +0200
From: Ivan Zahariev <famzah@...soft.com>
To: Thomas Gleixner <tglx@...utronix.de>,
"Yu, Yu-cheng" <yu-cheng.yu@...el.com>,
Andy Lutomirski <luto@...nel.org>,
LKML <linux-kernel@...r.kernel.org>
Cc: linux-tip-commits@...r.kernel.org,
Fenghua Yu <fenghua.yu@...el.com>,
Borislav Petkov <bp@...e.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Tony Luck <tony.luck@...el.com>, x86 <x86@...nel.org>,
"Shankar, Ravi V" <ravi.v.shankar@...el.com>
Subject: Re: [tip: x86/fpu] x86/fpu/xstate: Define new functions for clearing
fpregs and xstates
Hello gentlemen,
Hello Yu-cheng Yu,
Can you please take a look into this bug which syzbot tracked to a
commit of yours (b860eb8dce5906b14e3a7f3c771e0b3d6ef61b94). Even since
we switched from kernel 4.14 to 5.15 we are experiencing often random
segmentation faults with the following error in "dmesg":
post.sh[2237] bad frame in rt_sigreturn frame:00007ad24b2f8df8
ip:733cfa4351d1 sp:7ad24b2f9398 orax:ffffffffffffffff in
libc-2.28.so[733cfa36d000+147000]
Most commonly Bash is getting hit by this problem but other binaries
also experience the it less often.
Thomas Gleixner has already provided some insight and a simple
reproducer:
https://groups.google.com/g/syzkaller-bugs/c/rbdQkahfwE4/m/RyWIrlA0BQAJ
If there is no simple fix, can we simply revert the faulty commit?
Best regards.
--Ivan
Powered by blists - more mailing lists