netdev - [syzbot] kernel BUG in rxrpc_destroy_all

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Message-ID: <000000000000de2e6105c8008244@google.com>
Date:   Sun, 25 Jul 2021 23:03:24 -0700
From:   syzbot <syzbot+bf9c3ae5a6f9fd3d043c@...kaller.appspotmail.com>
To:     davem@...emloft.net, dhowells@...hat.com, kuba@...nel.org,
        linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org,
        marc.dionne@...istor.com, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] kernel BUG in rxrpc_destroy_all_connections

Hello,

syzbot found the following issue on:

HEAD commit:    08f71a1e39a1 selftests/bpf: Check inner map deletion
git tree:       bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11d2d36c300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=da140227e4f25b17
dashboard link: https://syzkaller.appspot.com/bug?extid=bf9c3ae5a6f9fd3d043c

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

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bf9c3ae5a6f9fd3d043c@...kaller.appspotmail.com

rxrpc: Assertion failed
------------[ cut here ]------------
kernel BUG at net/rxrpc/conn_object.c:479!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 10 Comm: kworker/u4:1 Tainted: G        W         5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:rxrpc_destroy_all_connections.cold+0x11/0x13 net/rxrpc/conn_object.c:479
Code: c0 48 c7 c1 40 07 a4 8a 48 89 f2 48 c7 c7 c0 03 a4 8a e8 61 f8 c0 ff 0f 0b e8 04 0d 4e f8 48 c7 c7 c0 06 a4 8a e8 4e f8 c0 ff <0f> 0b e8 f1 0c 4e f8 48 c7 c7 80 0b a4 8a e8 3b f8 c0 ff 0f 0b e8
RSP: 0018:ffffc90000cf7b30 EFLAGS: 00010282
RAX: 0000000000000017 RBX: ffff888017690000 RCX: 0000000000000000
RDX: ffff888010a59c40 RSI: ffffffff815d6a45 RDI: fffff5200019ef58
RBP: ffff888017690064 R08: 0000000000000017 R09: 0000000000000000
R10: ffffffff815d087e R11: 0000000000000000 R12: ffff888017690068
R13: ffff888017690078 R14: ffff888017690078 R15: ffff88801768feb8
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055eda1b11928 CR3: 0000000021a6e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rxrpc_exit_net+0x155/0x2f0 net/rxrpc/net_ns.c:119
 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:175
 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace 5947326f88ebc62c ]---
RIP: 0010:rxrpc_destroy_all_connections.cold+0x11/0x13 net/rxrpc/conn_object.c:479
Code: c0 48 c7 c1 40 07 a4 8a 48 89 f2 48 c7 c7 c0 03 a4 8a e8 61 f8 c0 ff 0f 0b e8 04 0d 4e f8 48 c7 c7 c0 06 a4 8a e8 4e f8 c0 ff <0f> 0b e8 f1 0c 4e f8 48 c7 c7 80 0b a4 8a e8 3b f8 c0 ff 0f 0b e8
RSP: 0018:ffffc90000cf7b30 EFLAGS: 00010282
RAX: 0000000000000017 RBX: ffff888017690000 RCX: 0000000000000000
RDX: ffff888010a59c40 RSI: ffffffff815d6a45 RDI: fffff5200019ef58
RBP: ffff888017690064 R08: 0000000000000017 R09: 0000000000000000
R10: ffffffff815d087e R11: 0000000000000000 R12: ffff888017690068
R13: ffff888017690078 R14: ffff888017690078 R15: ffff88801768feb8
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055eda1bbf997 CR3: 0000000021a6e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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