bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on 77e2b66864e69c17416614228723a1ebd3581ddc testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6a6b10651725cd259bd735baa920d9d7cfd328c46243729d74d463d7813815f7 run #0: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #1: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #2: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #3: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #4: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #5: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #6: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #7: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #8: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #9: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #10: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #11: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #12: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #13: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #14: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #15: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #16: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #17: crashed: kernel BUG in ext4_mb_load_buddy_gfp run #18: crashed: kernel BUG in corrupted run #19: crashed: kernel BUG in ext4_mb_load_buddy_gfp testing current HEAD fa33f9094f36943ea32f7fbe323293b62e96151d testing commit fa33f9094f36943ea32f7fbe323293b62e96151d compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 8add33e933cbe29c1a233c74d61a7cfd76886e824a4eda26c84a0a495ad625db all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 20m58.925178985s (build: 14m35.394725412s, test: 5m59.025492921s) the crash still happens on HEAD commit msg: Linux 4.14.268 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 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout