bisecting fixing commit since 06a4ec1d9dc652e17ee3ac2ceb6c7cf6c2b75cdd
building syzkaller on 424dd8e7b52828cad44ce653a5d4ac30670f5e2c
testing commit 06a4ec1d9dc652e17ee3ac2ceb6c7cf6c2b75cdd with gcc (GCC) 8.1.0
kernel signature: 4519e0922ec70bef4fcd25e2ca43a59eef50242d8646919d6a6ea19053c03449
run #0: crashed: INFO: task hung in synchronize_rcu
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in synchronize_rcu
run #3: crashed: no output from test machine
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: crashed: no output from test machine
testing current HEAD eb5f95f1593f7c22dac681b19e815828e2af3efd
testing commit eb5f95f1593f7c22dac681b19e815828e2af3efd with gcc (GCC) 8.1.0
kernel signature: c7120e38068270df9632a600262dfb115ab8990d71f762f206a5f8560528fcc0
run #0: crashed: INFO: task hung in synchronize_rcu
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in synchronize_rcu
run #3: crashed: no output from test machine
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: crashed: no output from test machine
revisions tested: 2, total time: 25m41.137840841s (build: 9m38.368910535s, test: 15m34.926944316s)
the crash still happens on HEAD
commit msg: Merge tag 's390-5.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
crash: no output from test machine