linux-kernel - general protection fault in __sock

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Message-ID: <000000000000559d460580ad5eeb@google.com>
Date:   Wed, 30 Jan 2019 06:03:03 -0800
From:   syzbot <syzbot+38b29941610a1cc735dc@...kaller.appspotmail.com>
To:     davem@...emloft.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: general protection fault in __sock_release (2)

Hello,

syzbot found the following crash on:

HEAD commit:    30e5c2c6bf28 net: Revert devlink health changes.
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1249a2b8c00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68
dashboard link: https://syzkaller.appspot.com/bug?extid=38b29941610a1cc735dc
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+38b29941610a1cc735dc@...kaller.appspotmail.com

bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
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: 8762 Comm: syz-executor0 Not tainted 5.0.0-rc3+ #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
RIP: 0010:__sock_release+0x2d/0x250 net/socket.c:574
Code: e5 41 57 41 56 41 55 41 54 49 89 f4 53 48 89 fb e8 38 d4 6c fb 4c 8d  
73 28 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f  
85 b1 01 00 00 4c 8b 6b 28 4d 85 ed 0f 84 c7 00 00
RSP: 0018:ffff8880a53bf8f8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005ff4000
RDX: 0000000000000005 RSI: ffffffff86152ab8 RDI: 0000000000000000
RBP: ffff8880a53bf920 R08: ffff8880a51e2500 R09: fffffbfff1462b55
R10: fffffbfff1462b54 R11: ffffffff8a315aa7 R12: 0000000000000000
R13: 0000000000000007 R14: 0000000000000028 R15: ffff88809fc0eb88
FS:  00007fabf4208700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000402e9d CR3: 00000000a585c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
  sock_release+0x18/0x20 net/socket.c:598
  inet_ctl_sock_destroy include/net/inet_common.h:56 [inline]
  icmp_sk_exit+0x11f/0x1f0 net/ipv4/icmp.c:1187
  ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153
  setup_net+0x4b2/0x8c0 net/core/net_namespace.c:331
  copy_net_ns+0x2ae/0x4b0 net/core/net_namespace.c:437
  create_new_namespaces+0x4ce/0x930 kernel/nsproxy.c:107
  unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206
  ksys_unshare+0x6d7/0xfb0 kernel/fork.c:2550
  __do_sys_unshare kernel/fork.c:2618 [inline]
  __se_sys_unshare kernel/fork.c:2616 [inline]
  __x64_sys_unshare+0x31/0x40 kernel/fork.c:2616
  do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fabf4207c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fabf42086d4
R13: 00000000004c6de4 R14: 00000000004dc408 R15: 00000000ffffffff
Modules linked in:
---[ end trace 320ccc001dc11318 ]---
RIP: 0010:__sock_release+0x2d/0x250 net/socket.c:574
Code: e5 41 57 41 56 41 55 41 54 49 89 f4 53 48 89 fb e8 38 d4 6c fb 4c 8d  
73 28 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f  
85 b1 01 00 00 4c 8b 6b 28 4d 85 ed 0f 84 c7 00 00
RSP: 0018:ffff8880a53bf8f8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005ff4000
RDX: 0000000000000005 RSI: ffffffff86152ab8 RDI: 0000000000000000
RBP: ffff8880a53bf920 R08: ffff8880a51e2500 R09: fffffbfff1462b55
R10: fffffbfff1462b54 R11: ffffffff8a315aa7 R12: 0000000000000000
R13: 0000000000000007 R14: 0000000000000028 R15: ffff88809fc0eb88
FS:  00007fabf4208700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000402e9d CR3: 00000000a585c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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