bisecting fixing commit since 64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc
building syzkaller on 838e7e2cd9228583ca33c49a39aea4d863d3e36d
testing commit 64570fbc14f8d7cb3fe3995f20e26bc25ce4b2cc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 73d8aa11e47d71cf9242913b10f4100fd0ed6e1c83357c356b4d35f73c6b965c
run #0: crashed: INFO: rcu detected stall in rtnl_newlink
run #1: crashed: INFO: rcu detected stall in sys_openat
run #2: crashed: INFO: rcu detected stall in mutex_spin_on_owner
run #3: crashed: INFO: rcu detected stall in sys_signalfd4
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
reproducer seems to be flaky
testing current HEAD d1587f7bfe9a0f97a75d42ac1489aeda551106bc
testing commit d1587f7bfe9a0f97a75d42ac1489aeda551106bc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 8584069f064a8904fab2281a35e937b8ed47f819013d87dcccb7d65e33e36157
run #0: crashed: INFO: rcu detected stall in sys_openat
run #1: crashed: INFO: rcu detected stall in netlink_sendmsg
run #2: crashed: INFO: rcu detected stall in sys_clock_settime
run #3: crashed: INFO: rcu detected stall in sys_getsockopt
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: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
Reproducer flagged being flaky
revisions tested: 2, total time: 36m16.132304175s (build: 12m37.542747824s, test: 22m51.668419995s)
the crash still happens on HEAD
commit msg: Merge branch 'for-5.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
crash: no output from test machine