bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on 5abc3f1ab298244473b613c289f1536e366fcf04
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 with gcc (GCC) 8.1.0
kernel signature: f599c4d6b9454e9f10e030848d481a10884d4029f118138b6bcbd1d5d9675efe
all runs: crashed: kernel BUG in f2fs_evict_inode
testing current HEAD 2d2791fce891fc20709232d49a6bae075b9a77f8
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8 with gcc (GCC) 8.1.0
kernel signature: 2cd123d1d02621ec56bb2b3067d2575810a0d80f1aa7d1e721dc89fd358c5c69
all runs: crashed: kernel BUG in f2fs_evict_inode
revisions tested: 2, total time: 26m40.363370533s (build: 20m17.864560416s, test: 5m41.517631206s)
the crash still happens on HEAD
commit msg: Linux 4.14.217
crash: kernel BUG in f2fs_evict_inode
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
device veth0_vlan entered promiscuous mode
------------[ cut here ]------------
kernel BUG at fs/f2fs/inode.c:600!
device veth1_vlan entered promiscuous mode
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready
Modules linked in:
ieee80211 phy4: mac80211_hwsim_start
CPU: 1 PID: 5820 Comm: syz-executor.2 Not tainted 4.14.217-syzkaller #0
ieee80211 phy4: mac80211_hwsim_add_interface (type=1 mac_addr=02:00:00:00:04:00)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8881e78ea480 task.stack: ffff8881e7548000
RIP: 0010:f2fs_evict_inode+0xc5c/0xf70 fs/f2fs/inode.c:600
RSP: 0018:ffff8881e754fb48 EFLAGS: 00010202
RAX: 0000000000000142 RBX: ffff8881d616a840 RCX: 0000000000000001
RDX: 1ffff1103926b578 RSI: 0000000000000001 RDI: ffff8881d5a48b84
RBP: ffff8881e754fbc8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000040 R12: ffff8881c935abc0
R13: ffff8881d616ac80 R14: ffff8881d5a48b00 R15: ffff8881c935a7f0
FS:  0000000002d2a940(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9dff6efa21 CR3: 00000001e9d43003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 evict+0x29c/0x590 fs/inode.c:555
 iput_final fs/inode.c:1524 [inline]
 iput+0x3ac/0x810 fs/inode.c:1551
 dentry_unlink_inode+0x22d/0x2e0 fs/dcache.c:387
 __dentry_kill+0x2d2/0x540 fs/dcache.c:591
 dentry_kill fs/dcache.c:632 [inline]
 dput.part.6+0x491/0x610 fs/dcache.c:847
 dput fs/dcache.c:811 [inline]
 do_one_tree+0x36/0x40 fs/dcache.c:1507
 shrink_dcache_for_umount+0x56/0x110 fs/dcache.c:1521
 generic_shutdown_super+0x61/0x330 fs/super.c:431
 kill_block_super+0x96/0xe0 fs/super.c:1161
 kill_f2fs_super+0x8d/0xb0 fs/f2fs/super.c:2786
 deactivate_locked_super+0x62/0xb0 fs/super.c:319
 deactivate_super+0x7d/0x90 fs/super.c:350
 cleanup_mnt+0x9f/0x130 fs/namespace.c:1183
 __cleanup_mnt+0xd/0x10 fs/namespace.c:1190
 task_work_run+0xe5/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x14a/0x190 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4607c7
RSP: 002b:00007fff9cef13e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004607c7
RDX: 0000000000403158 RSI: 0000000000000002 RDI: 00007fff9cef1490
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000009
R10: 0000000000000005 R11: 0000000000000246 R12: 00007fff9cef2520
R13: 0000000002d2ba60 R14: 0000000000000000 R15: 00007fff9cef2520
Code: c0 0f 85 20 f9 ff ff 48 c7 c2 20 f3 fa 86 be 1d 01 00 00 48 c7 c7 80 f3 fa 86 c6 05 3d be 04 06 01 e8 d5 6b a9 03 e9 fc f8 ff ff <0f> 0b e8 9d 68 d8 fe e9 e4 f4 ff ff 48 8b 7d 
ieee80211 phy4: mac80211_hwsim_bss_info_changed(changed=0xe vif->addr=02:00:00:00:04:00)
a0 
ieee80211 phy4:   ERP_CTS_PROT: 0
e8 8f 68 d8 fe 
RIP: f2fs_evict_inode+0xc5c/0xf70 fs/f2fs/inode.c:600 RSP: ffff8881e754fb48
---[ end trace ecc3ba4763b5a909 ]---
ieee80211 phy4:   ERP_PREAMBLE: 0