bisecting fixing commit since c6db52a88798e5a0dfef80041ad4d33cc8cf04eb
building syzkaller on 2420d1bcbcd9f5d5893c1aab8096cce81721dac2
testing commit c6db52a88798e5a0dfef80041ad4d33cc8cf04eb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 289f648f2c881fd2332f4cf910757c704bfd54de39c10449a83b6370a6c778e8
run #0: crashed: KASAN: use-after-free Read in bcm_can_tx
run #1: crashed: KASAN: use-after-free Read in bcm_can_tx
run #2: crashed: KASAN: use-after-free Read in tasklet_action
run #3: crashed: WARNING: ODEBUG bug in bcm_remove_op
run #4: crashed: KASAN: use-after-free Read in bcm_can_tx
run #5: crashed: KASAN: use-after-free Read in bcm_can_tx
run #6: crashed: KASAN: use-after-free Read in tasklet_action
run #7: crashed: WARNING: ODEBUG bug in bcm_remove_op
run #8: crashed: KASAN: use-after-free Read in tasklet_action
run #9: crashed: KASAN: use-after-free Read in tasklet_action
run #10: crashed: KASAN: use-after-free Read in bcm_can_tx
run #11: crashed: KASAN: use-after-free Read in bcm_can_tx
run #12: crashed: KASAN: use-after-free Read in tasklet_action
run #13: crashed: KASAN: use-after-free Read in bcm_can_tx
run #14: crashed: KASAN: use-after-free Read in tasklet_action
run #15: crashed: KASAN: use-after-free Read in tasklet_action
run #16: crashed: KASAN: use-after-free Read in tasklet_action
run #17: crashed: KASAN: use-after-free Read in bcm_can_tx
run #18: crashed: KASAN: use-after-free Read in tasklet_action
run #19: crashed: KASAN: use-after-free Read in bcm_tx_start_timer
testing current HEAD 5f9f3b0057d5c5782985784ba0159b05b4083055
testing commit 5f9f3b0057d5c5782985784ba0159b05b4083055
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b15bb7b76d4e83187b5c32ae747d6ddd61eddf0ce2b3e11d9f94954ce8e15115
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m31.304459543s (build: 17m52.943118341s, test: 12m3.289790234s)
the crash still happens on HEAD
commit msg: Linux 4.14.255
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1