bisecting fixing commit since 9a95f25269bd9257ab9fba7bb14355d50b5f39ec
building syzkaller on c8e81ce4c7e3b59e7c83c6fab56c217916f3b3b6
testing commit 9a95f25269bd9257ab9fba7bb14355d50b5f39ec
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b383d9dd34f58a746c316ef9f93c657d472463c2db6c556a5f11d3038e20d704
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
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 NULL pointer dereference in blk_mq_map_swqueue
run #6: crashed: BUG: unable to handle kernel
run #7: crashed: BUG: unable to handle kernel
run #8: crashed: BUG: unable to handle kernel
run #9: crashed: BUG: unable to handle kernel
run #10: crashed: BUG: unable to handle kernel
run #11: crashed: BUG: unable to handle kernel
run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #14: crashed: BUG: unable to handle kernel
run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #16: crashed: BUG: unable to handle kernel
run #17: crashed: BUG: unable to handle kernel
run #18: crashed: BUG: unable to handle kernel
run #19: crashed: BUG: unable to handle kernel
testing current HEAD cd529693461026636f76d0395a42cb2439bbd368
testing commit cd529693461026636f76d0395a42cb2439bbd368
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b6c4566e871f3e6bf014fb9efb1013279d9f95c402826bf56588f8293e4975a9
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m42.898375551s (build: 22m0.238837725s, test: 6m21.517399688s)
the crash still happens on HEAD
commit msg: Linux 4.14.253
crash: unregister_netdevice: waiting for DEV to become free
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1