syzbot


general protection fault in sctp_inq_pop

Status: fixed on 2019/10/15 23:40
Subsystems: sctp
[Documentation on labels]
Reported-by: syzbot+4a0643a653ac375612d1@syzkaller.appspotmail.com
Fix commit: c7a42eb49212 net: ipv6: fix listify ip6_rcv_finish in case of forwarding
First crash: 1761d, last: 1753d
Discussions (6)
Title Replies (including bot) Last reply
[PATCH 4.19 00/93] 4.19.81-stable review 107 (107) 2019/11/09 15:53
[PATCH 5.3 000/197] 5.3.8-stable review 203 (203) 2019/10/29 13:03
[PATCH AUTOSEL 4.19 01/37] PCI/ASPM: Do not initialize link state when aspm_disabled is set 37 (37) 2019/10/26 07:44
[PATCH AUTOSEL 5.3 01/33] net: ipv6: fix listify ip6_rcv_finish in case of forwarding 35 (35) 2019/10/25 15:49
[PATCH net-next] net: ipv6: fix listify ip6_rcv_finish in case of forwarding 7 (7) 2019/10/17 23:50
general protection fault in sctp_inq_pop 0 (1) 2019/08/22 14:53

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: 15509 Comm: syz-executor.1 Not tainted 5.3.0-rc3+ #139
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sctp_inq_pop+0x294/0xd80 net/sctp/inqueue.c:201
Code: 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 e3 08 00 00 49 8d 7d 02 4d 89 6c 24 60 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <0f> b6 0c 01 48 89 f8 83 e0 07 83 c0 01 38 c8 7c 08 84 c9 0f 85 4b
RSP: 0018:ffff888097d9ee40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880968405d8 RCX: 0000000000000001
RDX: 0000000000005803 RSI: ffffffff86b236aa RDI: 000000000000000a
RBP: ffff888097d9ee90 R08: ffff88808fd44240 R09: fffffbfff14a914f
R10: fffffbfff14a914e R11: ffffffff8a548a77 R12: ffff888096840580
R13: 0000000000000008 R14: 0000000000000000 R15: ffff888097d9f478
FS:  00007f59f27b8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f40b77fd000 CR3: 0000000063e8e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sctp_endpoint_bh_rcv+0x184/0x8d0 net/sctp/endpointola.c:385
 sctp_inq_push+0x1e4/0x280 net/sctp/inqueue.c:80
 sctp_rcv+0x2807/0x3590 net/sctp/input.c:256
 sctp6_rcv+0x17/0x30 net/sctp/ipv6.c:1049
 ip6_protocol_deliver_rcu+0x2fe/0x1660 net/ipv6/ip6_input.c:397
 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447
 dst_input include/net/dst.h:442 [inline]
 ip6_sublist_rcv_finish+0x98/0x1e0 net/ipv6/ip6_input.c:84
 ip6_list_rcv_finish net/ipv6/ip6_input.c:118 [inline]
 ip6_sublist_rcv+0x80c/0xcf0 net/ipv6/ip6_input.c:282
 ipv6_list_rcv+0x373/0x4b0 net/ipv6/ip6_input.c:316
 __netif_receive_skb_list_ptype net/core/dev.c:5049 [inline]
 __netif_receive_skb_list_core+0x1a2/0x9d0 net/core/dev.c:5087
 __netif_receive_skb_list net/core/dev.c:5149 [inline]
 netif_receive_skb_list_internal+0x7eb/0xe60 net/core/dev.c:5244
 gro_normal_list.part.0+0x1e/0xb0 net/core/dev.c:5757
 gro_normal_list net/core/dev.c:5755 [inline]
 gro_normal_one net/core/dev.c:5769 [inline]
 napi_frags_finish net/core/dev.c:5782 [inline]
 napi_gro_frags+0xa6a/0xea0 net/core/dev.c:5855
 tun_get_user+0x2e98/0x3fa0 drivers/net/tun.c:1974
 tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2020
 call_write_iter include/linux/fs.h:1870 [inline]
 do_iter_readv_writev+0x5f8/0x8f0 fs/read_write.c:693
 do_iter_write fs/read_write.c:970 [inline]
 do_iter_write+0x184/0x610 fs/read_write.c:951
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1015
 do_writev+0x15b/0x330 fs/read_write.c:1058
 __do_sys_writev fs/read_write.c:1131 [inline]
 __se_sys_writev fs/read_write.c:1128 [inline]
 __x64_sys_writev+0x75/0xb0 fs/read_write.c:1128
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4596e1
Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 b9 fb ff c3 48 83 ec 08 e8 fa 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f59f27b7ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000000010c RCX: 00000000004596e1
RDX: 0000000000000001 RSI: 00007f59f27b7c00 RDI: 00000000000000f0
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f59f27b86d4
R13: 00000000004c8783 R14: 00000000004df5a0 R15: 00000000ffffffff
Modules linked in:
---[ end trace 4d09ea96a0c7705b ]---
RIP: 0010:sctp_inq_pop+0x294/0xd80 net/sctp/inqueue.c:201
Code: 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 e3 08 00 00 49 8d 7d 02 4d 89 6c 24 60 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <0f> b6 0c 01 48 89 f8 83 e0 07 83 c0 01 38 c8 7c 08 84 c9 0f 85 4b
RSP: 0018:ffff888097d9ee40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880968405d8 RCX: 0000000000000001
RDX: 0000000000005803 RSI: ffffffff86b236aa RDI: 000000000000000a
RBP: ffff888097d9ee90 R08: ffff88808fd44240 R09: fffffbfff14a914f
R10: fffffbfff14a914e R11: ffffffff8a548a77 R12: ffff888096840580
R13: 0000000000000008 R14: 0000000000000000 R15: ffff888097d9f478
FS:  00007f59f27b8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f40b77fd000 CR3: 0000000063e8e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/19 22:53 net-next-old 20e79a0a2cfd ee12860b .config console log report ci-upstream-net-kasan-gce
2019/08/19 21:49 net-next-old 20e79a0a2cfd ee12860b .config console log report ci-upstream-net-kasan-gce
2019/08/25 22:18 linux-next 9733a7c62c66 d21c5d9d .config console log report ci-upstream-linux-next-kasan-gce-root
2019/08/17 19:16 linux-next 0c3d3d648b3e 55bf8926 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.