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general protection fault in tipc_mcast_filter_msg

Status: fixed on 2019/06/14 18:22
Subsystems: tipc
[Documentation on labels]
Reported-by: syzbot+be4bdf2cc3e85e952c50@syzkaller.appspotmail.com
Fix commit: 08e046c8966a tipc: fix a null pointer deref
First crash: 2092d, last: 2069d
Cause bisection: introduced by (bisect log) :
commit c55c8edafa91139419ed011f7d036274ce96be0b
Author: Hoang Le <hoang.h.le@dektech.com.au>
Date: Tue Mar 19 11:49:50 2019 +0000

  tipc: smooth change between replicast and broadcast

Crash: general protection fault in tipc_mcast_filter_msg (log)
Repro: C syz .config
  
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[net-next v1 1/2] tipc: fix use-after-free in tipc_sk_filter_rcv 4 (4) 2019/03/21 16:57
general protection fault in tipc_mcast_filter_msg 0 (1) 2019/03/20 21:22

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: 1 PID: 7750 Comm: syz-executor690 Not tainted 5.0.0+ #101
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tipc_mcast_filter_msg+0x21b/0x13d0 net/tipc/bcast.c:782
Code: 45 c0 0f 84 39 06 00 00 48 89 5d 98 e8 8e af a5 fa 49 8d bc 24 c8 00 00 00 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 9a 0e 00 00 49 8b 9c 24 c8 00 00 00 48 be 00 00
RSP: 0018:ffff88808e886fc8 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffff88808d039c08 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff86cab4a2 RDI: 00000000000000c8
RBP: ffff88808e887030 R08: ffff8880906c2500 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 0000000000000000
R13: 000000000000002c R14: 0000000000000000 R15: ffff88808d039c08
FS:  00000000022d1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001cc0 CR3: 00000000927d4000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tipc_sk_filter_rcv+0x182d/0x34f0 net/tipc/socket.c:2168
 tipc_sk_enqueue net/tipc/socket.c:2254 [inline]
 tipc_sk_rcv+0xc45/0x25a0 net/tipc/socket.c:2305
 tipc_sk_mcast_rcv+0x724/0x1020 net/tipc/socket.c:1209
 tipc_mcast_xmit+0x7fe/0x1200 net/tipc/bcast.c:410
 tipc_sendmcast+0xb36/0xfc0 net/tipc/socket.c:820
 __tipc_sendmsg+0x10df/0x18d0 net/tipc/socket.c:1358
 tipc_sendmsg+0x53/0x80 net/tipc/socket.c:1291
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:661
 ___sys_sendmsg+0x806/0x930 net/socket.c:2260
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2298
 __do_sys_sendmsg net/socket.c:2307 [inline]
 __se_sys_sendmsg net/socket.c:2305 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2305
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4401c9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffed2ebd9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401c9
RDX: 0000000000000000 RSI: 0000000020002140 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a50
R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 5c90913a196251bb ]---
RIP: 0010:tipc_mcast_filter_msg+0x21b/0x13d0 net/tipc/bcast.c:782
Code: 45 c0 0f 84 39 06 00 00 48 89 5d 98 e8 8e af a5 fa 49 8d bc 24 c8 00 00 00 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 9a 0e 00 00 49 8b 9c 24 c8 00 00 00 48 be 00 00
RSP: 0018:ffff88808e886fc8 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffff88808d039c08 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff86cab4a2 RDI: 00000000000000c8
RBP: ffff88808e887030 R08: ffff8880906c2500 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 0000000000000000
R13: 000000000000002c R14: 0000000000000000 R15: ffff88808d039c08
FS:  00000000022d1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001cc0 CR3: 00000000927d4000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3889):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/03/20 05:02 net-next-old 9bd5423fc75e 2458c1c6 .config console log report syz C ci-upstream-net-kasan-gce
2019/03/20 04:58 bpf-next a0cfa79f8470 2458c1c6 .config console log report syz C ci-upstream-bpf-next-kasan-gce
2019/03/20 04:30 net-next-old 9bd5423fc75e 2458c1c6 .config console log report syz C ci-upstream-net-kasan-gce
2019/03/20 03:41 bpf-next a0cfa79f8470 2458c1c6 .config console log report syz C ci-upstream-bpf-next-kasan-gce
2019/03/29 02:04 net-next-old eda3d1b02284 14c58f8d .config console log report syz ci-upstream-net-kasan-gce
2019/03/26 23:37 net-next-old be67101fbf27 55684ce1 .config console log report syz ci-upstream-net-kasan-gce
2019/03/27 01:37 linux-next ab8bba4ec4b9 55684ce1 .config console log report syz ci-upstream-linux-next-kasan-gce-root
2019/04/11 16:40 bpf-next 0e7c63766123 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 14:46 bpf-next 0e7c63766123 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 12:44 bpf-next 0e7c63766123 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 12:18 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 11:12 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 10:03 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 09:14 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 08:01 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 06:59 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 06:25 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 05:11 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 04:09 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 04:09 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 03:08 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 02:06 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 01:47 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/11 00:47 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 23:46 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 22:48 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 21:41 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 20:21 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 19:14 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 17:27 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 16:24 bpf-next 50bd645b3a21 e955ac50 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 14:08 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 13:10 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 12:07 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 11:05 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 09:45 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 08:38 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 07:32 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 06:06 bpf-next 6316f78306c1 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 03:58 bpf-next ff466b58055f 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 02:51 bpf-next ff466b58055f 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 02:41 bpf-next ff466b58055f 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/10 01:01 bpf-next ff466b58055f 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 23:41 bpf-next ff466b58055f 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 22:18 bpf-next ff466b58055f 65b612b7 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 20:52 bpf-next ff466b58055f 995065ff .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 20:04 bpf-next ff466b58055f 995065ff .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 19:01 bpf-next ff466b58055f 995065ff .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 18:04 bpf-next ff466b58055f 995065ff .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/09 17:01 bpf-next ff466b58055f 995065ff .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/05 04:01 net-next-old 847d44efad07 e5d1b3ac .config console log report ci-upstream-net-kasan-gce
2019/03/19 22:36 bpf-next a0cfa79f8470 e4549234 .config console log report ci-upstream-bpf-next-kasan-gce
2019/04/07 16:50 linux-next 81e0cd6a7f09 c34fde03 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.