bisecting fixing commit since 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7 testing commit 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 380600cf684b09c68491ea6be1f487a2d71178b4d8b3d26a712d8f39ea8f4b19 run #0: crashed: general protection fault in skb_release_data run #1: crashed: general protection fault in skb_release_data run #2: crashed: general protection fault in skb_release_data run #3: crashed: general protection fault in skb_release_data run #4: crashed: general protection fault in skb_release_data run #5: crashed: general protection fault in skb_release_data run #6: crashed: general protection fault in skb_release_data run #7: crashed: general protection fault in skb_release_data run #8: crashed: general protection fault in skb_release_data run #9: crashed: general protection fault in skb_release_data run #10: crashed: general protection fault in skb_release_data run #11: crashed: KASAN: slab-out-of-bounds Read in skb_release_data run #12: crashed: general protection fault in skb_release_data run #13: crashed: general protection fault in skb_release_data run #14: crashed: general protection fault in skb_release_data run #15: crashed: kernel BUG in validate_xmit_skb run #16: crashed: general protection fault in skb_release_data run #17: crashed: general protection fault in skb_release_data run #18: crashed: general protection fault in skb_release_data run #19: crashed: general protection fault in skb_release_data testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542 testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 5fcf2060f4ec43058d57db064639479e2679e7bca381ff5aa99825f48acfa602 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 32m16.119463761s (build: 24m34.61683476s, test: 6m55.419118934s) the crash still happens on HEAD commit msg: Linux 4.14.262 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout