bisecting fixing commit since 2b79150141611d3c6e1b55d4e70f49602482f0b8
building syzkaller on 18e33098d58c8738cc3b678346141b74d34d4e30
testing commit 2b79150141611d3c6e1b55d4e70f49602482f0b8 with gcc (GCC) 8.4.1 20210217
kernel signature: f9ec4e09240cf35fa5b2cce622fa393ff943c5913a70f9d0712632946ab784a6
all runs: crashed: kernel BUG in dnotify_free_mark
testing current HEAD 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79
testing commit 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 with gcc (GCC) 8.4.1 20210217
kernel signature: 08aaa143595fd62a942f3b1f073d1856160c6a645c0e8403950e96df16254767
all runs: crashed: kernel BUG in dnotify_free_mark
revisions tested: 2, total time: 22m55.170594067s (build: 15m35.764900694s, test: 6m19.40348488s)
the crash still happens on HEAD
commit msg: Linux 4.14.222
crash: kernel BUG in dnotify_free_mark
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
------------[ cut here ]------------
kernel BUG at fs/notify/dnotify/dnotify.c:131!
IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
device veth0_vlan entered promiscuous mode
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.222-syzkaller #0
device veth1_vlan entered promiscuous mode
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound fsnotify_mark_destroy_workfn
task: ffff8881f5316140 task.stack: ffff8881f5328000
RIP: 0010:dnotify_free_mark fs/notify/dnotify/dnotify.c:131 [inline]
RIP: 0010:dnotify_free_mark+0x3b/0x50 fs/notify/dnotify/dnotify.c:125
RSP: 0018:ffff8881f532fc70 EFLAGS: 00010282
IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready
RAX: dffffc0000000000 RBX: ffff8881ef25ba40 RCX: 1ffff1103d89dd6b
RDX: 1ffff1103d89dd77 RSI: ffff8881ec4eeb40 RDI: ffff8881ec4eebb8
RBP: ffff8881f532fc78 R08: ffff8881f532fcf8 R09: 1ffff1103ea65fa0
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881ec4eeb40
R13: ffffffff87938720 R14: dffffc0000000000 R15: ffff8881ec4eeb40
FS:  0000000000000000(0000) GS:ffff8881f6500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3416f9f710 CR3: 0000000008e6a005 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fsnotify_final_mark_destroy+0x72/0xa0 fs/notify/mark.c:192
IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready
 fsnotify_mark_destroy_workfn+0x1cf/0x370 fs/notify/mark.c:761
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
 process_one_work+0x74f/0x1620 kernel/workqueue.c:2116
 worker_thread+0xcc/0xee0 kernel/workqueue.c:2250
 kthread+0x338/0x400 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: c7 78 48 89 fa 48 89 e5 48 83 ec 08 48 c1 ea 03 80 3c 02 00 75 17 48 83 7e 78 00 75 0e 48 8b 3d d4 ac 74 08 e8 b7 a0 e9 ff c9 c3 <0f> 0b 48 89 75 f8 e8 9a d6 e9 ff 48 8b 75 f8 eb da 0f 1f 40 00 
RIP: dnotify_free_mark fs/notify/dnotify/dnotify.c:131 [inline] RSP: ffff8881f532fc70
RIP: dnotify_free_mark+0x3b/0x50 fs/notify/dnotify/dnotify.c:125 RSP: ffff8881f532fc70
---[ end trace 6984c75171eecaf6 ]---
ieee80211 phy7: mac80211_hwsim_bss_info_changed(changed=0x10 vif->addr=02:00:00:00:07:00)