This bug was fixed in the package linux - 5.4.0-56.62
---
linux (5.4.0-56.62) focal; urgency=medium
* focal/linux: 5.4.0-56.62 -proposed tracker (LP: #1905300)
* CVE-2020-4788
- selftests/powerpc: rfi_flush: disable entry flush if present
- powerpc/64s: flush L1D on
** Tags removed: verification-needed-focal
** Tags added: verification-done-focal
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https://bugs.launchpad.net/bugs/1896504
Title:
tc/ebpf: unable to use
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag
** Changed in: linux (Ubuntu Focal)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1896504
Title:
tc/ebpf: unable to use
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: Incomplete
** Changed in: linux (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Groovy)
Assignee:
Here is an example:
root@ubuntu1804hwe:~# uname -a
Linux ubuntu1804hwe 5.4.0-47-generic #51~18.04.1-Ubuntu SMP Sat Sep 5 14:35:50
UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
root@ubuntu1804hwe:~# cat test.c
#include
#include
#ifndef __section
# define __section(NAME)
With a newer kernel, the last command succeeds (not output):
root@ubuntu1804hwe:~# uname -a
Linux ubuntu1804hwe 5.9.0-rc3-ge1b81391421b+6wind-net #1 SMP Mon Sep 21
19:31:31 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
root@ubuntu1804hwe:~# tc filter add dev dummy1 egress matchall action bpf obj
I forget to explain how to check that the tc command was accepted:
root@ubuntu1804hwe:~# tc filter show dev dummy1 egress
filter protocol all pref 49152 matchall chain 0
filter protocol all pref 49152 matchall chain 0 handle 0x1
not_in_hw
action order 1: bpf test.o:[test] id 9 tag
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