bisecting fixing commit since b850307b279cbd12ab8c654d1a3dfe55319cc475
building syzkaller on eabcced43245881efa7769d938bcaf795ed48742
testing commit b850307b279cbd12ab8c654d1a3dfe55319cc475
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 467ac0101d0d3c5a90b7ee3843c86f2963e8bca00737e1fdf638c2b149ff5211
run #0: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #1: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #2: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
run #3: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #4: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #5: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
run #6: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #7: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
run #8: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #9: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
run #10: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #11: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #12: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
run #13: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
run #14: crashed: KASAN: out-of-bounds Read in __ext4_check_dir_entry
run #15: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #16: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #17: crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
run #18: OK
run #19: OK
testing current HEAD 964f3712e6a7447d9d3203f2be3f6c50e78ea179
testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 383dcdf984208b962a0d7cef236c8e1be356a4a6866cdf6a13c7db79260eac99
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m42.451439989s (build: 18m3.302772728s, test: 12m10.645312677s)
the crash still happens on HEAD
commit msg: Linux 4.14.240
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1