bisecting fixing commit since 7e0165b2f1a912a06e381e91f0f4e495f4ac3736
building syzkaller on e30cbdae48129d22c125435cb72fc20447c7a0e2
testing commit 7e0165b2f1a912a06e381e91f0f4e495f4ac3736 with gcc (GCC) 8.1.0
kernel signature: 510964dfbb897534789f53902d107b5c246307a1fd02920bd0688727f16b7c63
run #0: crashed: KASAN: slab-out-of-bounds Read in j1939_tp_txtimer
run #1: crashed: KASAN: slab-out-of-bounds Read in j1939_tp_txtimer
run #2: crashed: WARNING in j1939_xtp_rx_rts
run #3: crashed: KASAN: use-after-free Read in j1939_tp_txtimer
run #4: crashed: KASAN: slab-out-of-bounds Read in j1939_tp_txtimer
run #5: crashed: KASAN: use-after-free Read in j1939_tp_txtimer
run #6: crashed: KASAN: slab-out-of-bounds Read in j1939_tp_txtimer
run #7: basic kernel testing failed: failed to copy test binary to VM: timedout ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor006822409" "root@10.128.15.209:./syz-executor006822409"]
Warning: Permanently added '10.128.15.209' (ECDSA) to the list of known hosts.

run #8: OK
run #9: OK
testing current HEAD b85051e755b0e9d6dd8f17ef1da083851b83287d
testing commit b85051e755b0e9d6dd8f17ef1da083851b83287d with gcc (GCC) 8.1.0
kernel signature: 896e7015b24effd876c8178a509318e576335b3617f25ea8d652ed6d21a166b7
run #0: crashed: KASAN: slab-out-of-bounds Read in j1939_tp_txtimer
run #1: crashed: unregister_netdevice: waiting for DEV to become free
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: boot failed: can't ssh into the instance
revisions tested: 2, total time: 36m36.722827281s (build: 13m25.644403782s, test: 22m9.363085042s)
the crash still happens on HEAD
commit msg: Merge tag 'fixes-for-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for vcan0 to become free. Usage count = 5