Messages in this thread | | | From | Pintu Agarwal <> | Date | Wed, 13 Jan 2021 17:35:18 +0530 | Subject | Re: [BUG]: Kernel 4.9: Kernel crash at fs/sysfs/file.c : sysfs_kf_seq_show |
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On Tue, 12 Jan 2021 at 17:39, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote: > > On Tue, Jan 12, 2021 at 05:31:54PM +0530, Pintu Agarwal wrote: > > Hi, > > > > I am using Kernel: 4.9.217 for one of the ARM32 boards for Qualcomm SOC. > > https://github.com/android-linux-stable/msm-4.9 > > > > But I think this is a general bug applicable to :Kernel 4.9 under > > fs/sysfs/file.c > > So, I wanted to quickly check here if others are familiar with this > > issue and if it is fixed already. > > Note, this issue does not occur in 4.14 Kernel. > > > > When I execute below command, the Kernel is crashing. > > I tried to add few debug prints to find more details. I see that the > > ops->show pointer is not valid (seems corrupted). > > So I wanted to understand how this can happen only for this particular node. > > Other sysfs entries are working fine. > >
I see that this issue was reported earlier as well by others. https://syzkaller.appspot.com/bug?id=2ec2a9da5c711df3d3d12071bac487b96e75e103 https://gitlab.freedesktop.org/drm/amd/-/issues/413 https://bugzilla.redhat.com/show_bug.cgi?id=1615070
So it seems to be common issue and thus I wanted to check here if its similar.
Thanks, Pintu
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