bisecting fixing commit since 9a95f25269bd9257ab9fba7bb14355d50b5f39ec
building syzkaller on c8e81ce4c7e3b59e7c83c6fab56c217916f3b3b6
testing commit 9a95f25269bd9257ab9fba7bb14355d50b5f39ec
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4a523a7603463170adea38b25a8cfd04983f1d468d1d04d716bb6d5218a8f5f1
run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #1: crashed: BUG: unable to handle kernel
run #2: crashed: BUG: unable to handle kernel
run #3: crashed: BUG: unable to handle kernel
run #4: crashed: BUG: unable to handle kernel
run #5: crashed: BUG: unable to handle kernel
run #6: crashed: BUG: unable to handle kernel
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 NULL pointer dereference in blk_mq_map_swqueue
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
run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in blk_mq_map_swqueue
run #19: crashed: BUG: unable to handle kernel
testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d3500b61610b3ee30b8f961e4fa2301e0f693a5fdaa56c4645be935b70ab57d3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m6.334560272s (build: 18m37.618768066s, test: 6m31.532868006s)
the crash still happens on HEAD
commit msg: Linux 4.14.256
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