On 2018-07-03 17:49, Raphael Hertzog wrote: > Hi, > > On Fri, 22 Jun 2018, Luca Boccassi wrote: >> I am downgrading as I verified there is a working workaround, add the >> following to the kernel cmdline: >> >> slab_common.usercopy_fallback=y > > It's still hitting users hard until they find out this bug report.
I added a NEWS entry with the workaround, but probably only few of the affected users have apt-listbugs installed ... >> It might be possible to fix, and someone at gr security published a >> patch that among other things changes the module to use the correct API >> (although for an older version): >> https://www.grsecurity.net/~paxguy1/nvidia-drivers-387.12-pax.patch >> >> but given it's non-trivial and there is a working cmdline workaround, >> I'm not going to try and apply that patch, and Nvidia is looking into >> it. > > RedHat published a much less invasive patch that you can use > in the mean time: > https://bugzilla.redhat.com/attachment.cgi?id=1425704 > (part of https://bugzilla.redhat.com/show_bug.cgi?id=1570493 ) Thanks for the pointer! > > In > https://devtalk.nvidia.com/default/topic/1031067/linux/-linux416-nvidia-390-48-nvidia_stack_cache-rip-0010-usercopy_warn-0x7e-0xa0/post/5268599/#5268599 > someone confirmed that the above patch works so it's no longer "untested" > contrary to what its author said. > > Otherwise, according to various bug reports, it seems to not happen in > version 396.24 although the above patch seems to not have been applied > in this version. Maybe you could update the package to this version at > least in experimental? 396.xx sitting in experimental/NEW for a month or so now ... Andreas
