bisecting fixing commit since 4fa640dc52302b5e62b01b05c755b055549633ae
building syzkaller on d88894e6773ab63ac8b3f4b2edbae88290aaf0d6
testing commit 4fa640dc52302b5e62b01b05c755b055549633ae
compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 36c63fda3960456ba6291ae4a5e7feed0e590a268e9065c5df75bcd021e52baa
run #0: crashed: BUG: soft lockup in do_idle
run #1: crashed: BUG: workqueue lockup
run #2: crashed: BUG: soft lockup in do_idle
run #3: crashed: BUG: soft lockup in do_idle
run #4: crashed: BUG: soft lockup in do_idle
run #5: crashed: BUG: soft lockup in do_idle
run #6: crashed: BUG: soft lockup in do_idle
run #7: crashed: BUG: soft lockup in do_idle
run #8: crashed: BUG: soft lockup in do_idle
run #9: crashed: BUG: soft lockup in linkwatch_event
run #10: crashed: BUG: soft lockup in linkwatch_event
run #11: crashed: BUG: soft lockup in do_idle
run #12: crashed: BUG: soft lockup in do_idle
run #13: crashed: BUG: workqueue lockup
run #14: crashed: BUG: soft lockup in do_idle
run #15: crashed: BUG: soft lockup in do_idle
run #16: crashed: BUG: soft lockup in do_idle
run #17: crashed: BUG: soft lockup in smp_call_function
run #18: crashed: INFO: rcu detected stall in linkwatch_event
run #19: crashed: no output from test machine
testing current HEAD ab2a7a35c4e7e848de9a7cf70f36b62584154140
testing commit ab2a7a35c4e7e848de9a7cf70f36b62584154140
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a698f1a41f0492b38848356c99d7b84b8d9df25e9763c24eea17966a6bb31378
run #0: crashed: BUG: soft lockup in sys_signalfd4
run #1: crashed: BUG: soft lockup in do_idle
run #2: crashed: BUG: soft lockup in rtnl_newlink
run #3: crashed: BUG: soft lockup in do_idle
run #4: crashed: BUG: workqueue lockup
run #5: crashed: BUG: soft lockup in tc_modify_qdisc
run #6: crashed: BUG: workqueue lockup
run #7: crashed: BUG: soft lockup in sys_socket
run #8: crashed: BUG: soft lockup in wb_workfn
run #9: crashed: no output from test machine
revisions tested: 2, total time: 29m7.373003349s (build: 11m37.879320662s, test: 16m35.619839546s)
the crash still happens on HEAD
commit msg: Merge tag 'block-5.15-2021-10-01' of git://git.kernel.dk/linux-block
crash: no output from test machine