general protection fault in cbs

general protection fault in cbs_destroy
Status: upstream: reported C repro on 2020/01/27 15:08
Reported-by: syzbot+fb9d148d3801bababbf3@syzkaller.appspotmail.com
First crash: 840d, last: 16h11m

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in cbs_destroy	C	done	error	700	961d	982d	0/22	upstream: reported C repro on 2019/09/08 06:08

Sample crash report:

IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
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
CPU: 0 PID: 8103 Comm: syz-executor282 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 30 52 85 04 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 31 52 85 04 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 e8 51 85 04 49 8d 7d
RSP: 0018:ffff888091eb74e8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880b36ae000 RCX: ffffffff814bdebb
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b36ae328
RBP: ffff8880b36ae320 R08: 0000000000000001 R09: fffffbfff15cead8
R10: ffffffff8ae756c3 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880b36ae280 R15: ffff8880b36ae328
FS:  0000555556957300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 00000000b5270000 CR4: 00000000003406f0
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]
 cbs_destroy+0x81/0x280 net/sched/sch_cbs.c:448
 qdisc_create+0xb70/0x1130 net/sched/sch_api.c:1204
 tc_modify_qdisc+0x50d/0x1a80 net/sched/sch_api.c:1572
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
 __sys_sendmsg net/socket.c:2265 [inline]
 __do_sys_sendmsg net/socket.c:2274 [inline]
 __se_sys_sendmsg net/socket.c:2272 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f254db393f9
Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff54b42e28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fff54b42e38 RCX: 00007f254db393f9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff54b42e40
R13: 00007fff54b42e60 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 20e0c332498caafc ]---
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 30 52 85 04 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 31 52 85 04 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 e8 51 85 04 49 8d 7d
RSP: 0018:ffff888091eb74e8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880b36ae000 RCX: ffffffff814bdebb
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b36ae328
RBP: ffff8880b36ae320 R08: 0000000000000001 R09: fffffbfff15cead8
R10: ffffffff8ae756c3 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880b36ae280 R15: ffff8880b36ae328
FS:  0000555556957300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 00000000b5270000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 84 30 52 85 04    	je     0x4855236
   6:	48 b8 00 02 00 00 00 	movabs $0xdead000000000200,%rax
   d:	00 ad de
  10:	49 39 c4             	cmp    %rax,%r12
  13:	0f 84 31 52 85 04    	je     0x485524a
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 e2             	mov    %r12,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 51                	jne    0x81
  30:	49 8b 14 24          	mov    (%r12),%rdx
  34:	48 39 ea             	cmp    %rbp,%rdx
  37:	0f 85 e8 51 85 04    	jne    0x4855225
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	7d                   	.byte 0x7d

Crashes (2425):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci2-linux-4-19	2022/05/12 22:45	linux-4.19.y	3f8a27f9e27b	9ad6612a	.config	log	report	syz	C		general protection fault in cbs_destroy
ci2-linux-4-19	2021/07/31 03:48	linux-4.19.y	a89b48fe9308	6c236867	.config	log	report	syz	C		general protection fault in cbs_destroy
ci2-linux-4-19	2020/01/27 16:16	linux-4.19.y	88d6de67e390	56cd6c9b	.config	log	report	syz	C
ci2-linux-4-19	2022/05/16 19:57	linux-4.19.y	3f8a27f9e27b	744a39e2	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/16 00:17	linux-4.19.y	3f8a27f9e27b	744a39e2	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/15 08:40	linux-4.19.y	3f8a27f9e27b	744a39e2	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/14 16:10	linux-4.19.y	3f8a27f9e27b	744a39e2	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/13 20:56	linux-4.19.y	3f8a27f9e27b	7ce5a022	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/12 22:23	linux-4.19.y	3f8a27f9e27b	9ad6612a	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/10 22:36	linux-4.19.y	3f8a27f9e27b	8b277b8e	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/05 13:46	linux-4.19.y	3f8a27f9e27b	b3f09415	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/05 12:33	linux-4.19.y	3f8a27f9e27b	b3f09415	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/04 16:48	linux-4.19.y	3f8a27f9e27b	dc9e5259	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/04 15:41	linux-4.19.y	3f8a27f9e27b	dc9e5259	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/04 02:24	linux-4.19.y	3f8a27f9e27b	dc9e5259	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/03 11:01	linux-4.19.y	3f8a27f9e27b	2df221f6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/02 21:52	linux-4.19.y	3f8a27f9e27b	2df221f6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/02 14:58	linux-4.19.y	3f8a27f9e27b	2df221f6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/02 09:47	linux-4.19.y	3f8a27f9e27b	2df221f6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/01 13:18	linux-4.19.y	3f8a27f9e27b	2df221f6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/05/01 01:36	linux-4.19.y	3f8a27f9e27b	2df221f6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/29 09:22	linux-4.19.y	3f8a27f9e27b	e9076525	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/29 05:27	linux-4.19.y	3f8a27f9e27b	e9076525	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/27 11:32	linux-4.19.y	3f8a27f9e27b	1fa34c1b	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/27 08:30	linux-4.19.y	3f8a27f9e27b	1fa34c1b	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/27 02:30	linux-4.19.y	3f8a27f9e27b	1fa34c1b	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/26 12:15	linux-4.19.y	3f8a27f9e27b	1fa34c1b	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/26 05:05	linux-4.19.y	3f8a27f9e27b	152baedd	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/25 15:08	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/24 14:15	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/24 01:06	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/23 02:09	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/22 23:33	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/22 20:51	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/22 19:37	linux-4.19.y	3f8a27f9e27b	131df97d	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/22 04:50	linux-4.19.y	3f8a27f9e27b	2738b391	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/21 04:42	linux-4.19.y	3f8a27f9e27b	d4befee1	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/18 01:39	linux-4.19.y	3f8a27f9e27b	8bcc32a6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/17 14:45	linux-4.19.y	3f8a27f9e27b	8bcc32a6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/17 10:31	linux-4.19.y	3f8a27f9e27b	8bcc32a6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/16 22:48	linux-4.19.y	3f8a27f9e27b	8bcc32a6	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/14 22:49	linux-4.19.y	3f8a27f9e27b	b17b2923	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/14 17:27	linux-4.19.y	3f8a27f9e27b	b17b2923	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/14 10:13	linux-4.19.y	3f8a27f9e27b	b17b2923	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/14 00:12	linux-4.19.y	3f8a27f9e27b	b17b2923	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/13 06:06	linux-4.19.y	3f8a27f9e27b	dacb3f1c	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/13 04:42	linux-4.19.y	3f8a27f9e27b	dacb3f1c	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2022/04/12 22:26	linux-4.19.y	3f8a27f9e27b	dacb3f1c	.config	log	report			info	general protection fault in cbs_destroy
ci2-linux-4-19	2021/01/15 11:23	linux-4.19.y	675cc038067f	65a7a854	.config	log	report			info
ci2-linux-4-19	2020/01/27 15:07	linux-4.19.y	88d6de67e390	56cd6c9b	.config	log	report