There has a bug when I run bpf selftest "test_sockmap" on Linux 5.10.209, and I found it introduced by "c842a4c4ae7f bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding". On Fri, Feb 2, 2024 at 11:03 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, Feb 02, 2024 at 11:40:38AM +0800, Lucien Wang wrote: > > Kernel version：16ad71c250c1 (HEAD -> linux-5.10.y, tag: v5.10.209, > > origin/linux-5.10.y) Linux 5.10.209 > > > > Bug reproduced steps： > > 1. cd (kernel source tree root)/tools/testing/selftests/bpf > > 2. make test_sockmap ; make test_progs > > 3. ./test_sockmap > > # 1/ 6 sockmap::txmsg test passthrough:OK > > # 2/ 6 sockmap::txmsg test redirect:OK > > # 3/ 6 sockmap::txmsg test drop:OK > > # 4/ 6 sockmap::txmsg test ingress redirect:OK > > > > After "# 4/ 6 sockmap::txmsg test ingress redirect:OK" display from > > terminal, the main process stucks and sends nothing. > > 4. In other terminal run " ps fax |grep sockmap " ,below is output > > 13076 pts/0 S+ 0:00 | \_ ./test_sockmap > > 13129 pts/0 S+ 0:00 | \_ ./test_sockmap > > 13130 pts/0 Z+ 0:00 | \_ [test_sockmap] <defunct> > > 13237 pts/1 S+ 0:00 \_ grep --color=auto sockmap > > Obversely, because of child process 13129 sleep, so the main process is stuck. > > > > My research: > > I use Bisection method to find the bug patch " c842a4c4ae7f bpf: > > sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding > > "(on linux-5.10.y branch), it backport from v5.16-rc1 , > > It must due to merge high patches incompletely, Please take a few > > moment for this. > > I do not understand, sorry, what exactly do you want us to do here? > > confused, > > greg k-h
