kernel BUG at net/core/skbuff.c:LINE!

kernel BUG at net/core/skbuff.c:LINE!
Status: upstream: reported C repro on 2019/04/27 20:12
Reported-by: syzbot+77d13153b9599a418a9c@syzkaller.appspotmail.com
First crash: 680d, last: 49d

Fix bisection: fixed by (bisect log) [no-op commit]:
commit 4f12385298d474541a794f4c47980861299f20e7
Author: Sibi Sankar <sibis@codeaurora.org>
Date: Wed Jul 22 20:10:45 2020 +0000

remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load

similar bugs (10):
Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
android-44	kernel BUG at net/core/skbuff.c:LINE!	C		79	471d	696d	0/2	public: reported C repro on 2019/04/11 08:44
android-54	kernel BUG in pfkey_send_acquire	syz		32	21d	49d	0/1	upstream: reported syz repro on 2021/01/17 15:19
upstream	kernel BUG at net/core/skbuff.c:LINE! (2)	C		562	1135d	1224d	4/21	fixed on 2018/01/29 03:39
android-54	kernel BUG at net/core/skbuff.c:LINE!	C		99	21d	420d	0/1	upstream: reported C repro on 2020/01/12 09:43
android-414	kernel BUG at net/core/skbuff.c:LINE!	C		2743	459d	696d	0/1	public: reported C repro on 2019/04/11 00:00
upstream	kernel BUG at net/core/skbuff.c:LINE! (3)	C	done	4399	13d	1130d	20/21	upstream: reported C repro on 2018/02/01 19:21
upstream	kernel BUG at net/core/skbuff.c:LINE!			5	1230d	1300d	3/21	fixed on 2017/10/27 10:10
linux-4.19	kernel BUG in pfkey_send_acquire	C		56	19d	49d	0/1	upstream: reported C repro on 2021/01/17 15:22
linux-4.14	kernel BUG at net/core/skbuff.c:LINE!	C		2661	9h17m	695d	0/1	upstream: reported C repro on 2019/04/12 15:43
android-49	kernel BUG at net/core/skbuff.c:LINE!	C		391	459d	695d	0/3	public: reported C repro on 2019/04/12 00:00

Sample crash report:

audit: type=1400 audit(1601953488.473:8): avc:  denied  { execmem } for  pid=6490 comm="syz-executor174" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
skbuff: skb_over_panic: text:00000000a4992447 len:232 put:72 head:00000000b2795519 data:00000000b2795519 tail:0xe8 end:0xc0 dev:<NULL>
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6511 Comm: syz-executor174 Not tainted 4.19.149-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_panic+0x158/0x1e0 net/core/skbuff.c:104
Code: 01 84 c0 74 04 3c 03 7e 33 8b 8b 80 00 00 00 41 56 45 89 e8 48 c7 c7 e0 89 b4 88 41 57 56 48 89 ee 52 4c 89 e2 e8 27 84 47 fb <0f> 0b 48 c7 c7 40 3c dd 8a 48 83 c4 20 e8 d6 53 a2 fd 4c 89 4c 24
RSP: 0018:ffff8880a703efb0 EFLAGS: 00010286
RAX: 0000000000000086 RBX: ffff8880a38c4c00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815b623f RDI: ffffed1014e07de8
RBP: ffffffff88b494e0 R08: 0000000000000086 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff86d00743
R13: 0000000000000048 R14: ffffffff88b489a0 R15: 00000000000000c0
FS:  00007f41b7f65700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd55686a20 CR3: 0000000091423000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put+0x183/0x1c0 net/core/skbuff.c:1702
 dump_esp_combs net/key/af_key.c:3012 [inline]
 pfkey_send_acquire+0x1853/0x2540 net/key/af_key.c:3233
 km_query+0xe2/0x240 net/xfrm/xfrm_state.c:1990
 xfrm_state_find+0x1c58/0x2c90 net/xfrm/xfrm_state.c:1040
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1410 [inline]
 xfrm_tmpl_resolve+0x2f3/0xc50 net/xfrm/xfrm_policy.c:1455
 xfrm_resolve_and_create_bundle+0xd8/0x3e0 net/xfrm/xfrm_policy.c:1753
 xfrm_lookup_with_ifid+0x241/0x1f60 net/xfrm/xfrm_policy.c:2076
 xfrm_lookup net/xfrm/xfrm_policy.c:2200 [inline]
 xfrm_lookup_route+0x36/0x200 net/xfrm/xfrm_policy.c:2211
 ip_route_output_flow+0xa6/0xc0 net/ipv4/route.c:2638
 udp_sendmsg+0x19fc/0x2530 net/ipv4/udp.c:1101
 inet_sendmsg+0x174/0x640 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc7/0x130 net/socket.c:632
 ___sys_sendmsg+0x3b3/0x8f0 net/socket.c:2115
 __sys_sendmmsg+0x195/0x470 net/socket.c:2210
 __do_sys_sendmmsg net/socket.c:2239 [inline]
 __se_sys_sendmmsg net/socket.c:2236 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2236
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x447239
Code: e8 dc e6 ff ff 48 83 c4 18 c3 0f 1f 80 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 0f 83 ab 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f41b7f64da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000006dcc58 RCX: 0000000000447239
RDX: 000000000800001d RSI: 0000000020007fc0 RDI: 0000000000000003
RBP: 00000000006dcc50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc5c
R13: 0000000000000002 R14: 0000000009000702 R15: 0000000000000005
Modules linked in:
---[ end trace 6f0428ae9617ecfc ]---
RIP: 0010:skb_panic+0x158/0x1e0 net/core/skbuff.c:104
Code: 01 84 c0 74 04 3c 03 7e 33 8b 8b 80 00 00 00 41 56 45 89 e8 48 c7 c7 e0 89 b4 88 41 57 56 48 89 ee 52 4c 89 e2 e8 27 84 47 fb <0f> 0b 48 c7 c7 40 3c dd 8a 48 83 c4 20 e8 d6 53 a2 fd 4c 89 4c 24
RSP: 0018:ffff8880a703efb0 EFLAGS: 00010286
RAX: 0000000000000086 RBX: ffff8880a38c4c00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815b623f RDI: ffffed1014e07de8
RBP: ffffffff88b494e0 R08: 0000000000000086 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff86d00743
R13: 0000000000000048 R14: ffffffff88b489a0 R15: 00000000000000c0
FS:  00007f41b7f65700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15702fa000 CR3: 0000000091423000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (484):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info
ci2-linux-4-19	2020/10/06 03:06	linux-4.19.y	b09c3451	1880b4a9	.config	log	report	syz	C
ci2-linux-4-19	2019/12/24 10:07	linux-4.19.y	672481c2	be5c2c81	.config	log	report	syz	C
ci2-linux-4-19	2020/01/28 06:33	linux-4.19.y	88d6de67	56cd6c9b	.config	log	report	syz
ci2-linux-4-19	2019/05/03 07:34	linux-4.19.y	a03957ab	1bfa09b9	.config	log	report	syz
ci2-linux-4-19	2019/05/01 01:25	linux-4.19.y	19bb613a	618456b4	.config	log	report	syz
ci2-linux-4-19	2019/04/28 01:52	linux-4.19.y	19bb613a	b617407b	.config	log	report	syz
ci2-linux-4-19	2019/04/27 21:56	linux-4.19.y	19bb613a	b617407b	.config	log	report	syz
ci2-linux-4-19	2021/01/17 03:51	linux-4.19.y	675cc038	65a7a854	.config	log	report			info
ci2-linux-4-19	2021/01/16 14:39	linux-4.19.y	675cc038	65a7a854	.config	log	report			info
ci2-linux-4-19	2021/01/15 22:08	linux-4.19.y	675cc038	65a7a854	.config	log	report			info
ci2-linux-4-19	2021/01/15 12:32	linux-4.19.y	675cc038	65a7a854	.config	log	report			info
ci2-linux-4-19	2021/01/15 07:42	linux-4.19.y	675cc038	65a7a854	.config	log	report			info
ci2-linux-4-19	2021/01/15 01:56	linux-4.19.y	675cc038	468dbb55	.config	log	report			info
ci2-linux-4-19	2021/01/14 15:20	linux-4.19.y	675cc038	468dbb55	.config	log	report			info
ci2-linux-4-19	2021/01/12 13:57	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report			info
ci2-linux-4-19	2021/01/12 09:52	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report			info
ci2-linux-4-19	2021/01/12 06:44	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report			info
ci2-linux-4-19	2021/01/11 19:47	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report			info
ci2-linux-4-19	2021/01/11 11:28	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report			info
ci2-linux-4-19	2021/01/11 05:48	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report			info
ci2-linux-4-19	2021/01/09 05:42	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/08 22:20	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/08 20:38	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/08 12:56	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/08 07:05	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/07 20:42	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/07 17:02	linux-4.19.y	4143d798	c104d4a3	.config	log	report			info
ci2-linux-4-19	2021/01/06 17:13	linux-4.19.y	4143d798	fff20c29	.config	log	report			info
ci2-linux-4-19	2021/01/06 11:05	linux-4.19.y	3207316b	fff20c29	.config	log	report			info
ci2-linux-4-19	2021/01/05 23:09	linux-4.19.y	3207316b	b1c228e1	.config	log	report			info
ci2-linux-4-19	2021/01/05 22:16	linux-4.19.y	3207316b	b1c228e1	.config	log	report			info
ci2-linux-4-19	2021/01/05 11:53	linux-4.19.y	3207316b	a0234d98	.config	log	report			info
ci2-linux-4-19	2021/01/05 09:07	linux-4.19.y	3207316b	2a28ff1f	.config	log	report			info
ci2-linux-4-19	2021/01/04 17:35	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/04 12:33	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/03 22:04	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/03 18:07	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/03 05:00	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/03 03:34	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/02 23:10	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/02 22:07	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/02 14:32	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/02 11:34	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/02 07:30	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/02 04:27	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/01 18:09	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/01 16:29	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/01 09:24	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2021/01/01 05:18	linux-4.19.y	3207316b	79264ae3	.config	log	report			info
ci2-linux-4-19	2020/12/31 01:59	linux-4.19.y	3207316b	5cc121d6	.config	log	report			info
ci2-linux-4-19	2020/12/30 11:29	linux-4.19.y	3207316b	0fa352f2	.config	log	report			info
ci2-linux-4-19	2019/04/27 19:11	linux-4.19.y	19bb613a	b617407b	.config	log	report