bisecting fixing commit since 893af1c79e42e53af0da22165b46eea135af0613
building syzkaller on 8620c2c2581732b54045bd75ae1220982fbb650f
testing commit 893af1c79e42e53af0da22165b46eea135af0613 with gcc (GCC) 8.1.0
kernel signature: 013cbc2ca2bad7b33dc42cf78ba8a4ada561c0f3
run #0: crashed: INFO: task hung in grab_super
run #1: crashed: INFO: task hung in grab_super
run #2: crashed: no output from test machine
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 672481c2deffb371d8a7dfdc009e44c09864a869
testing commit 672481c2deffb371d8a7dfdc009e44c09864a869 with gcc (GCC) 8.1.0
kernel signature: 0767f3be75ab535c7ac69c8a9c96405450209ecd
run #0: crashed: INFO: task hung in grab_super
run #1: crashed: no output from test machine
run #2: crashed: no output from test machine
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: 36m49.43722661s (build: 17m24.324930777s, test: 18m19.62874324s)
the crash still happens on HEAD
commit msg: Linux 4.19.91
crash: no output from test machine