bisecting fixing commit since 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf
building syzkaller on 510951950dc0ee69cfdaf746061d3dbe31b49fd8
testing commit 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf with gcc (GCC) 8.1.0
kernel signature: 518fc84f7dc6b81e7c69c6b7c523b10d8c99eab0b2239192f22a9591b446abab
run #0: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #1: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #2: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #3: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #4: crashed: no output from test machine
run #5: crashed: no output from test machine
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: boot failed: can't ssh into the instance
testing current HEAD 47ec5303d73ea344e84f46660fff693c57641386
testing commit 47ec5303d73ea344e84f46660fff693c57641386 with gcc (GCC) 8.1.0
kernel signature: c29d3a113a934486fb10a0eb111049ef80482580c60d9b04f43d5056b7c9cbfa
run #0: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #1: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #2: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #3: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #4: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #5: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #6: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #7: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
revisions tested: 2, total time: 28m36.779136765s (build: 9m56.234091972s, test: 18m12.679020383s)
the crash still happens on HEAD
commit msg: Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
crash: no output from test machine