bisecting fixing commit since 14b58326976de6ef3998eefec1dd7f8b38b97a75
building syzkaller on 28ac5c9e93a44c3eb145195ffb55591be58ef510
testing commit 14b58326976de6ef3998eefec1dd7f8b38b97a75
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9be889f6580c2b9b69907746521d954aafcebb9a5f3f628c918cf712322e9de0
run #0: crashed: BUG: corrupted list in l2cap_chan_put
run #1: crashed: BUG: corrupted list in l2cap_chan_put
run #2: crashed: BUG: corrupted list in l2cap_chan_put
run #3: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #4: crashed: BUG: corrupted list in l2cap_chan_put
run #5: crashed: BUG: corrupted list in l2cap_chan_put
run #6: crashed: BUG: corrupted list in l2cap_chan_put
run #7: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #8: crashed: BUG: corrupted list in l2cap_chan_put
run #9: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #10: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #11: crashed: BUG: corrupted list in l2cap_chan_put
run #12: crashed: BUG: corrupted list in l2cap_chan_put
run #13: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #14: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #15: crashed: BUG: corrupted list in l2cap_chan_put
run #16: crashed: KASAN: use-after-free Read in l2cap_chan_put
run #17: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #18: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #19: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
testing current HEAD eb045674aab31aa55a4f9aec27cce36e3d946a21
testing commit eb045674aab31aa55a4f9aec27cce36e3d946a21
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f474d75e3596f8689b2c9839af9bb246a2bc2f1bbda69cdc6ba856ecd4a55d53
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 37m48.287068422s (build: 24m59.319530968s, test: 12m16.029612732s)
the crash still happens on HEAD
commit msg: Linux 4.14.272
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