syzbot


BUG: unable to handle kernel NULL pointer dereference in sock_poll

Status: closed as dup on 2018/06/10 01:38
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+344bb0f46d7719cd9483@syzkaller.appspotmail.com
First crash: 2360d, last: 2344d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
BUG: unable to handle kernel NULL pointer dereference in corrupted net C 5 2357d 2357d
Discussions (1)
Title Replies (including bot) Last reply
BUG: unable to handle kernel NULL pointer dereference in sock_poll 1 (2) 2018/06/10 01:38

Sample crash report:
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 1cfe3b067 P4D 1cfe3b067 PUD 1ceb74067 PMD 0 
Oops: 0010 [#1] SMP KASAN
CPU: 1 PID: 4542 Comm: syz-executor692 Not tainted 4.17.0+ #101
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8801c9a174c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801ad2fe800 RCX: 1ffffffff10eac7d
RDX: ffff8801c9a179e0 RSI: ffff8801a8314200 RDI: ffff8801ad49c780
RBP: ffff8801c9a17630 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10039342e9d
R13: ffff8801c9a179e0 R14: ffff8801ad2fe812 R15: ffff8801ad2fec58
FS:  0000000002630880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ad4b6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sock_poll+0x1d1/0x710 net/socket.c:1168
 vfs_poll+0x77/0x2a0 fs/select.c:40
 do_pollfd fs/select.c:848 [inline]
 do_poll fs/select.c:896 [inline]
 do_sys_poll+0x6fd/0x1100 fs/select.c:990
 __do_sys_ppoll fs/select.c:1098 [inline]
 __se_sys_ppoll fs/select.c:1070 [inline]
 __x64_sys_ppoll+0x2fa/0x5f0 fs/select.c:1070
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x43fcf9
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 6b 45 00 00 c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ffec146ac58 EFLAGS: 00000213 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcf9
RDX: 0000000020000140 RSI: 0000000000000001 RDI: 00000000200000c0
RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8
R10: 0000000020000180 R11: 0000000000000213 R12: 0000000000401620
R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000000
---[ end trace 48cb202474045dc9 ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8801c9a174c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801ad2fe800 RCX: 1ffffffff10eac7d
RDX: ffff8801c9a179e0 RSI: ffff8801a8314200 RDI: ffff8801ad49c780
RBP: ffff8801c9a17630 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10039342e9d
R13: ffff8801c9a179e0 R14: ffff8801ad2fe812 R15: ffff8801ad2fec58
FS:  0000000002630880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ad4b6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (7650):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/06/14 03:00 upstream be779f03d563 27c5f59f .config console log report syz C ci-upstream-kasan-gce-root
2018/06/14 02:46 upstream be779f03d563 27c5f59f .config console log report syz C ci-upstream-kasan-gce
2018/06/11 20:47 upstream f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-kasan-gce
2018/06/11 20:45 upstream f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-kasan-gce-root
2018/06/11 12:19 upstream f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-kasan-gce
2018/06/11 12:17 upstream f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-kasan-gce-root
2018/06/09 18:59 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce-root
2018/06/09 17:53 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce-root
2018/06/09 16:48 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce
2018/06/09 16:15 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce-root
2018/06/09 14:36 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce
2018/06/09 13:26 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce
2018/06/09 12:45 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce
2018/06/14 03:01 upstream be779f03d563 27c5f59f .config console log report syz C ci-upstream-kasan-gce-386
2018/06/11 20:45 upstream f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-kasan-gce-386
2018/06/09 09:48 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce-386
2018/06/20 08:13 net-next-old f0dc7f9c6dd9 095ef806 .config console log report syz C ci-upstream-net-kasan-gce
2018/06/19 03:20 net-next-old f0dc7f9c6dd9 45c54f75 .config console log report syz C ci-upstream-net-kasan-gce
2018/06/19 00:50 net-next-old f0dc7f9c6dd9 45c54f75 .config console log report syz C ci-upstream-net-kasan-gce
2018/06/11 20:30 net-next-old f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-net-kasan-gce
2018/06/11 12:02 net-next-old f0dc7f9c6dd9 ae8bdb50 .config console log report syz C ci-upstream-net-kasan-gce
2018/06/09 10:35 net-next-old 3a979e8c07e3 866118af .config console log report syz C ci-upstream-net-kasan-gce
2018/06/09 01:22 net-next-old 3a979e8c07e3 866118af .config console log report syz C ci-upstream-net-kasan-gce
2018/06/08 19:58 net-next-old 3a979e8c07e3 866118af .config console log report syz C ci-upstream-net-kasan-gce
2018/06/11 12:22 upstream f0dc7f9c6dd9 ae8bdb50 .config console log report syz ci-upstream-kasan-gce-386
2018/06/08 20:57 upstream 410feb75de24 866118af .config console log report syz ci-upstream-kasan-gce-386
2018/06/16 01:30 upstream 4c5e8fc62d6a 27c5f59f .config console log report ci-upstream-kasan-gce-root
2018/06/15 17:14 upstream 4c5e8fc62d6a 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/05 18:49 upstream 716a685fdb89 a316ff92 .config console log report ci-upstream-kasan-gce
2018/06/16 02:52 upstream 4c5e8fc62d6a 27c5f59f .config console log report ci-upstream-kasan-gce-386
2018/06/22 04:35 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/22 03:53 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/22 02:57 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/22 01:56 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/22 01:51 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/22 00:37 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 23:36 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 23:09 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 22:12 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 21:41 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 21:33 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 20:29 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 20:22 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 19:21 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 19:07 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 18:05 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 17:13 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 16:15 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 15:41 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 14:55 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 14:03 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 14:03 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 12:58 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 12:12 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 11:23 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 10:34 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 09:53 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 09:11 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 08:29 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 07:50 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 07:11 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 06:32 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 05:39 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 04:54 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 04:50 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 03:50 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
2018/06/21 02:52 net-next-old f0dc7f9c6dd9 095ef806 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.