bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on c0ced5570c6505a80235b64884c93e89733b77f3 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 with gcc (GCC) 8.4.1 20210217 kernel signature: 1036e4f83a231535f77da160d15453cf94b7683c5cbdae2fb9a325e04b35e065 run #0: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #1: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #2: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #3: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #4: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #5: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #6: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #7: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #8: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #9: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #10: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #11: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #12: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #13: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #14: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #15: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #16: crashed: KASAN: use-after-free Write in ext4_write_inline_data run #17: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #18: crashed: KASAN: slab-out-of-bounds Write in ext4_write_inline_data run #19: crashed: KASAN: use-after-free Write in ext4_write_inline_data testing current HEAD a6b2dae3ee3a3f9f4db3fab5b4b9e493fecf4acd testing commit a6b2dae3ee3a3f9f4db3fab5b4b9e493fecf4acd with gcc (GCC) 8.4.1 20210217 kernel signature: ef3265a8199a92f2c483e2753909407a327aa4c230f398d64ab1c181ab5aa83c all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m10.881521276s (build: 18m59.338285441s, test: 6m35.516616053s) the crash still happens on HEAD commit msg: Linux 4.14.235 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout