bisecting fixing commit since 675cc038067f0e530471c56a7442935f84669d95
building syzkaller on 65a7a8540d29e72622fca06522587f7e66539fd3
testing commit 675cc038067f0e530471c56a7442935f84669d95
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 36ac829ad5e9eed2a2cb36bd390a7c4111b4911deb87843f1aea34ea61f5f2f5
run #0: crashed: INFO: task hung in grab_super
run #1: crashed: INFO: task hung in grab_super
run #2: crashed: INFO: task hung in grab_super
run #3: crashed: INFO: task hung in grab_super
run #4: crashed: INFO: task hung in grab_super
run #5: crashed: INFO: task hung in grab_super
run #6: crashed: INFO: task hung in grab_super
run #7: crashed: INFO: task hung in grab_super
run #8: crashed: INFO: task hung in grab_super
run #9: crashed: INFO: task hung in grab_super
run #10: crashed: INFO: task hung in grab_super
run #11: crashed: INFO: task hung in grab_super
run #12: crashed: INFO: task hung in grab_super
run #13: crashed: INFO: task hung in grab_super
run #14: crashed: no output from test machine
run #15: crashed: no output from test machine
run #16: crashed: no output from test machine
run #17: crashed: no output from test machine
run #18: crashed: no output from test machine
run #19: crashed: no output from test machine
testing current HEAD 6ca2f514c57864e3085a65c5e9d2adca4144bc4c
testing commit 6ca2f514c57864e3085a65c5e9d2adca4144bc4c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c5c4fcd448b6adaadf6f9f297349bf437cb2c787395f8e6d8e2aa4a6e0014b2d
run #0: crashed: INFO: task hung in grab_super
run #1: crashed: INFO: task hung in grab_super
run #2: crashed: INFO: task hung in grab_super
run #3: crashed: INFO: task hung in grab_super
run #4: crashed: INFO: task hung in grab_super
run #5: crashed: INFO: task hung in grab_super
run #6: crashed: INFO: task hung in grab_super
run #7: crashed: INFO: task hung in grab_super
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
revisions tested: 2, total time: 37m19.684050619s (build: 20m30.69901068s, test: 16m24.2774651s)
the crash still happens on HEAD
commit msg: Linux 4.19.201
crash: no output from test machine