Closing this bug with Won't fix as this kernel / release is no longer supported.
Please feel free to open a new bug report if you're still experiencing this on
a newer release (Bionic 18.04.3 / Disco 19.04)
Thanks!
** Changed in: linux (Ubuntu)
Status: Triaged => Won't Fix
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@Joseph Salisbury: I've upgraded to the latest kernel and the problem
still persists. I'm starting to think it's a problem with the Blackmagic
drivers?
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@David Lee, that indicates that HARDENED_USERCOPY_PAGESPAN is not set.
@Vinson Lee, do you still see this bug with the latest -proposed kernel
as well?
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I ran the command as requested, and got nothing
root@helen:~# grep HARDENED_USERCOPY_PAGESPAN= /boot/config-`uname -r`
root@helen:~#
There appears to be another kernel update today. However that update did
not help with the issue.
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Hi David,
Can you run the following command with that running -proposed kernel:
grep HARDENED_USERCOPY_PAGESPAN= /boot/config-`uname -r`
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https://bugs.launchpad.net/bugs/1628686
Title:
Upgraded to proposed kernel.
Linux helen 4.8.0-25-generic #27-Ubuntu SMP Thu Oct 13 03:34:50 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
Issue still occurs:
[ 75.257763] usercopy: kernel memory overwrite attempt detected to
9dfb48493d38 () (16 bytes)
[ 75.257791] [ cut here
Getting the same error with the Blackmagic Intensity module.
[ 73.553893] [ cut here ]
[ 73.553896] kernel BUG at /build/linux-NNryke/linux-4.8.0/mm/usercopy.c:75!
[ 73.553899] invalid opcode: [#3] SMP
[ 73.553901] Modules linked in: xfrm_user xfrm4_tunnel
The Yakkety kernel in -proposed now has
CONFIG_HARDENED_USERCOPY_PAGESPAN disabled.
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Tags added: kernel-da-key yakkety
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