bisecting fixing commit since 14b58326976de6ef3998eefec1dd7f8b38b97a75
building syzkaller on 28ac5c9e93a44c3eb145195ffb55591be58ef510
testing commit 14b58326976de6ef3998eefec1dd7f8b38b97a75
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d428c596b6db1eac73d0caf2f13eb8bbb6d0a0559b006ffacc648fc29ff2e7f0
run #0: crashed: KASAN: use-after-free Write in l2cap_chan_create
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: KASAN: use-after-free Read in l2cap_sock_shutdown
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: KASAN: use-after-free Read in l2cap_sock_shutdown
run #9: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #10: crashed: BUG: corrupted list in l2cap_chan_put
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 Write in ex_handler_refcount
run #14: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #15: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #16: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #17: crashed: BUG: corrupted list in l2cap_chan_put
run #18: crashed: BUG: corrupted list in l2cap_chan_put
run #19: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ba7be9eb45059723e0d85c9d74333bf15239f35ec602878b7a34df33e4828322
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 34m9.680143553s (build: 20m58.967607989s, test: 12m31.584364085s)
the crash still happens on HEAD
commit msg: Linux 4.14.280
crash: unregister_netdevice: waiting for DEV to become free
IPVS: ftp: loaded support on port[0] = 21
can: request_module (can-proto-0) failed.
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
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1