bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on 77e2b66864e69c17416614228723a1ebd3581ddc testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: d6108faa6a75d178c22f5b4c28fa6d6334347ecad6e0c8a8e07118d2937c527f run #0: crashed: kernel BUG in ext4_write_inline_data_end run #1: crashed: kernel BUG in ext4_write_inline_data_end run #2: crashed: kernel BUG in ext4_write_inline_data_end run #3: crashed: kernel BUG in ext4_write_inline_data_end run #4: crashed: kernel BUG in __block_commit_write run #5: crashed: kernel BUG in ext4_write_inline_data_end run #6: crashed: kernel BUG in ext4_write_inline_data_end run #7: crashed: kernel BUG in ext4_write_inline_data_end run #8: crashed: kernel BUG in ext4_write_inline_data_end run #9: crashed: kernel BUG in ext4_write_inline_data_end run #10: crashed: kernel BUG in ext4_write_inline_data_end run #11: crashed: kernel BUG in ext4_write_inline_data_end run #12: crashed: kernel BUG in ext4_write_inline_data_end run #13: crashed: kernel BUG in ext4_write_inline_data_end run #14: crashed: kernel BUG in __block_commit_write run #15: crashed: kernel BUG in ext4_write_inline_data_end run #16: crashed: kernel BUG in ext4_write_inline_data_end run #17: crashed: kernel BUG in __block_commit_write run #18: crashed: kernel BUG in __block_commit_write run #19: crashed: kernel BUG in ext4_write_inline_data_end testing current HEAD f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f testing commit f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 3f9cb75168eb9420b8950ce5ae5d35b5d257495303345ae455925f04fe98f511 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m27.362076231s (build: 18m48.418509574s, test: 7m4.478352242s) the crash still happens on HEAD commit msg: Linux 4.14.248 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout