bisecting fixing commit since 14b58326976de6ef3998eefec1dd7f8b38b97a75
building syzkaller on 28ac5c9e93a44c3eb145195ffb55591be58ef510
testing commit 14b58326976de6ef3998eefec1dd7f8b38b97a75
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9ea6471b4f3b59dccc28b7e339d081eb7d801f4c2833bb423a138f5ac91cff36
run #0: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #1: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #2: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
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: KASAN: use-after-free Read in l2cap_sock_shutdown
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: KASAN: use-after-free Read in l2cap_sock_shutdown
run #11: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #12: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #13: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #14: crashed: BUG: corrupted list in l2cap_chan_put
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: 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 74766a973637a02c32c04c1c6496e114e4855239
testing commit 74766a973637a02c32c04c1c6496e114e4855239
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 30c6a2132ef1eaddb4c66086d38b6128719081fdfa1aadd9ab428b2b5ed05ed8
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m24.033501011s (build: 16m18.291090121s, test: 12m32.306239995s)
the crash still happens on HEAD
commit msg: Linux 4.14.275
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