bisecting fixing commit since 9a95f25269bd9257ab9fba7bb14355d50b5f39ec
building syzkaller on c8e81ce4c7e3b59e7c83c6fab56c217916f3b3b6
testing commit 9a95f25269bd9257ab9fba7bb14355d50b5f39ec with gcc (GCC) 8.4.1 20210217
kernel signature: 8ad200665cc0bbb1549106576e59561899f4586e4be2d4b19832954515c894d2
run #0: crashed: BUG: unable to handle kernel
run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #3: crashed: BUG: unable to handle kernel
run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #5: crashed: BUG: unable to handle kernel
run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #7: crashed: BUG: unable to handle kernel
run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #9: crashed: BUG: unable to handle kernel
run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #11: crashed: BUG: unable to handle kernel
run #12: crashed: BUG: unable to handle kernel
run #13: crashed: BUG: unable to handle kernel
run #14: crashed: BUG: unable to handle kernel
run #15: crashed: BUG: unable to handle kernel
run #16: crashed: BUG: unable to handle kernel
run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #18: crashed: BUG: unable to handle kernel
run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
testing current HEAD ad8397a84e1e425e3f8221638cee2bfa237d9b2c
testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c with gcc (GCC) 8.4.1 20210217
kernel signature: 47fccd38a5608c07a0ffebf05975773ffb7a09033cc7e0eb5596607daca50849
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m40.388615008s (build: 21m19.891905008s, test: 6m22.553807278s)
the crash still happens on HEAD
commit msg: Linux 4.14.234
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1