syzbot


general protection fault in qfq_deactivate_class

Status: auto-closed as invalid on 2020/11/18 22:39
Reported-by: syzbot+8ad974f086ce560bd339@syzkaller.appspotmail.com
First crash: 715d, last: 715d

Sample crash report:
device veth0_macvtap left promiscuous mode
device veth1_vlan left promiscuous mode
device veth0_vlan left promiscuous mode
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7603 Comm: kworker/u4:6 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
task: ffff88805e58a540 task.stack: ffff88805e598000
RIP: 0010:__list_del_entry_valid+0x81/0xef lib/list_debug.c:51
RSP: 0018:ffff88805e59f938 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88808d1339c0 RCX: 1ffffffff0fe794c
RDX: 0000000000000000 RSI: ffff88808d1339c0 RDI: ffff88808d133a18
RBP: ffff88808d133a10 R08: ffff88805e58a540 R09: dffffc0000000000
R10: ffff88805e59fa00 R11: ffff88805e58a540 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88808d133a18 R15: ffff8880a9753700
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c028 CR3: 000000008af23000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 qfq_deactivate_class+0x4c/0xc20 net/sched/sch_qfq.c:358
 qfq_reset_qdisc+0x165/0x2b0 net/sched/sch_qfq.c:1464
 qdisc_destroy+0x104/0x310 net/sched/sch_generic.c:723
 dev_shutdown+0x27d/0x42d net/sched/sch_generic.c:1000
 rollback_registered_many+0x684/0xa70 net/core/dev.c:7200
 unregister_netdevice_many.part.0+0x16/0x1d0 net/core/dev.c:8281
 unregister_netdevice_many net/core/dev.c:8280 [inline]
 default_device_exit_batch+0x2dd/0x380 net/core/dev.c:8742
 ops_exit_list.isra.0+0xef/0x140 net/core/net_namespace.c:145
 cleanup_net+0x3bb/0x820 net/core/net_namespace.c:484
 process_one_work+0x7c0/0x14c0 kernel/workqueue.c:2116
 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: c5 0f 84 df 00 00 00 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 97 00 00 00 49 8d 
RIP: __list_del_entry_valid+0x81/0xef lib/list_debug.c:51 RSP: ffff88805e59f938
---[ end trace 592dfd220dea8851 ]---

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/07/21 22:38 linux-4.14.y b850307b279c e562dd8a .config log report