general protection fault in rds_recv_rcvbuf

general protection fault in rds_recv_rcvbuf_delta
Status: fixed on 2019/10/09 10:54
Reported-by: syzbot+4b4f8163c2e246df3c4c@syzkaller.appspotmail.com
Fix commit: c5c1a030 net/rds: An rds_sock is added too early to the hash table
First crash: 804d, last: 577d

Cause bisection: introduced by (bisect log) :
commit b534875d5ab348fb9193692589e2ee82ae768e3a
Author: Dennis Dalessandro <dennis.dalessandro@intel.com>
Date: Wed Jan 6 18:02:59 2016 +0000

IB/rdmavt: Add device specific info prints

Crash: BUG: unable to handle kernel NULL pointer dereference in rds_bind (log)
Repro: C syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	general protection fault in rds_recv_rcvbuf_delta				1	378d	378d	0/1	auto-closed as invalid on 2020/05/10 22:05
linux-4.19	general protection fault in rds_recv_rcvbuf_delta	C		done	7	545d	591d	1/1	fixed on 2019/12/02 18:09

Sample crash report:

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: 8393 Comm: syz-executor221 Not tainted 5.0.0-rc4+ #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rds_recv_rcvbuf_delta.part.0+0x14a/0x3f0 net/rds/recv.c:103
Code: c1 ea 03 80 3c 02 00 0f 85 6e 02 00 00 4c 8b a3 c0 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 2c 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 00
RSP: 0018:ffff88808dcef670 EFLAGS: 00010007
RAX: dffffc0000000000 RBX: ffff8880915c57c0 RCX: ffffffff8681f5bd
RDX: 0000000000000005 RSI: ffffffff8681f5cb RDI: 000000000000002c
RBP: ffff88808dcef6a8 R08: ffff888085d94280 R09: ffffed1011b9dec4
R10: ffffed1011b9dec3 R11: 0000000000000003 R12: 0000000000000000
R13: ffff8880915c5ce4 R14: 000000000002e400 R15: ffff88809a1c2d00
FS:  0000000000ff7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006dab10 CR3: 0000000093bdf000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rds_recv_rcvbuf_delta net/rds/recv.c:379 [inline]
 rds_recv_incoming+0x789/0x11f0 net/rds/recv.c:379
 rds_loop_xmit+0xf3/0x2a0 net/rds/loop.c:96
 rds_send_xmit+0x1113/0x2560 net/rds/send.c:355
 rds_sendmsg+0x280a/0x3450 net/rds/send.c:1368
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 ___sys_sendmsg+0x806/0x930 net/socket.c:2116
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2154
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x442209
Code: e8 6c e8 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 cb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd97209bd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442209
RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 000000000000dfc2 R08: 0000000500000000 R09: 0000000500000000
R10: 0000000500000000 R11: 0000000000000246 R12: 0000000000403060
R13: 00000000004030f0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 36259ac7607bc96f ]---
RIP: 0010:rds_recv_rcvbuf_delta.part.0+0x14a/0x3f0 net/rds/recv.c:103
Code: c1 ea 03 80 3c 02 00 0f 85 6e 02 00 00 4c 8b a3 c0 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 2c 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 00
RSP: 0018:ffff88808dcef670 EFLAGS: 00010007
RAX: dffffc0000000000 RBX: ffff8880915c57c0 RCX: ffffffff8681f5bd
RDX: 0000000000000005 RSI: ffffffff8681f5cb RDI: 000000000000002c
RBP: ffff88808dcef6a8 R08: ffff888085d94280 R09: ffffed1011b9dec4
R10: ffffed1011b9dec3 R11: 0000000000000003 R12: 0000000000000000
R13: ffff8880915c5ce4 R14: 000000000002e400 R15: ffff88809a1c2d00
FS:  0000000000ff7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006dab10 CR3: 0000000093bdf000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (35):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-selinux-root	2019/02/02 22:02	upstream	cd984a5b	c198d5dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2019/02/02 22:00	upstream	cd984a5b	c198d5dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/02/02 21:59	upstream	cd984a5b	c198d5dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/02/02 19:15	upstream	cd984a5b	c198d5dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-386	2019/02/02 22:01	upstream	cd984a5b	c198d5dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-linux-next-kasan-gce-root	2019/02/02 20:02	linux-next	dc4c8999	c198d5dd	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-net-kasan-gce	2019/06/10 12:16	net-next	ad3a9ee0	0159583c	.config	log	report	syz		davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/06/27 11:02	upstream	249155c2	7509bf36	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-selinux-root	2019/06/26 12:22	upstream	249155c2	4d342240	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/06/10 05:54	upstream	d1fdb6d8	0159583c	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2019/06/10 05:50	upstream	d1fdb6d8	0159583c	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2019/04/17 10:03	upstream	444fe991	b0e8efcb	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-selinux-root	2019/04/08 21:59	upstream	fd008d1a	0dfb0452	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/04/08 21:33	upstream	fd008d1a	0dfb0452	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/04/07 11:11	upstream	faac51dd	c34fde03	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/04/07 04:32	upstream	faac51dd	c34fde03	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/04/04 20:47	upstream	145f47c7	6a475fff	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-selinux-root	2019/03/24 22:00	upstream	1bdd3dbf	acbc5b7d	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-selinux-root	2019/03/24 15:59	upstream	1bdd3dbf	acbc5b7d	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/03/22 16:31	upstream	0939221e	dce6e62f	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/03/14 14:06	upstream	fa3d493f	d09a902e	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/03/13 18:57	upstream	ebc551f2	2881fc25	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2019/03/10 07:21	upstream	6cdc577a	12365b99	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2019/03/09 23:11	upstream	38e7571c	12365b99	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/03/05 22:12	upstream	63bdf428	16559f86	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-root	2019/03/04 14:50	upstream	1c163f4c	7c693b52	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/03/03 02:19	upstream	c93d9218	1c0e457a	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce	2019/02/02 15:49	upstream	cd984a5b	c198d5dd	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2018/11/24 08:13	upstream	7c98a426	ecc7c870	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-smack-root	2018/11/11 17:46	upstream	e255aee5	7b5f8621	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-386	2019/04/30 02:38	upstream	80871482	b617407b	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-386	2019/04/25 07:11	upstream	cd8dead0	8e3c52b1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-386	2019/04/14 06:34	upstream	b60bc066	c402d8f1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-kasan-gce-386	2019/04/01 11:47	upstream	79a3aaa7	ccf2355a	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-net-this-kasan-gce	2018/12/06 12:13	net	ebaf39e6	3ab38479	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com