general protection fault in rxrpc_process_call

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 9c0f8cbd libbpf: Normalize and improve logging across few ..
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=145610b9900000
kernel config: https://syzkaller.appspot.com/x/.config?x=2537da6c2e380e6b
dashboard link: https://syzkaller.appspot.com/bug?extid=fdcfdda12d2a381f9872
compiler: gcc (GCC) 10.1.0-syz 20200507
CC: [da...@davemloft.net dhow...@redhat.com ku...@kernel.org linu...@lists.infradead.org linux-...@vger.kernel.org net...@vger.kernel.org net...@vger.kernel.org]

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+fdcfdd...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krxrpcd rxrpc_process_call
RIP: 0010:rxrpc_resend net/rxrpc/call_event.c:199 [inline]
RIP: 0010:rxrpc_process_call+0xfdf/0x20e0 net/rxrpc/call_event.c:412
Code: bf 01 00 00 00 e8 f1 49 26 fa 40 80 fd 01 75 63 e8 a6 4d 26 fa 49 8d 7f 20 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 10 00 0f 85 50 10 00 00 49 8b 6f 20 48 8b 7c 24 48 48 89 ee
RSP: 0018:ffffc90000d8fc18 EFLAGS: 00010202
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff874df3cf
RDX: dffffc0000000000 RSI: ffffffff874df3da RDI: 0000000000000020
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8ab2230f
R10: 0000000000000001 R11: 1ffffffff183ab6c R12: 0000000000000001
R13: 00000000ffffffff R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32323000 CR3: 000000006d3f0000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace eb9c0ea689a2398c ]---
RIP: 0010:rxrpc_resend net/rxrpc/call_event.c:199 [inline]
RIP: 0010:rxrpc_process_call+0xfdf/0x20e0 net/rxrpc/call_event.c:412
Code: bf 01 00 00 00 e8 f1 49 26 fa 40 80 fd 01 75 63 e8 a6 4d 26 fa 49 8d 7f 20 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 10 00 0f 85 50 10 00 00 49 8b 6f 20 48 8b 7c 24 48 48 89 ee
RSP: 0018:ffffc90000d8fc18 EFLAGS: 00010202
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff874df3cf
RDX: dffffc0000000000 RSI: ffffffff874df3da RDI: 0000000000000020
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8ab2230f
R10: 0000000000000001 R11: 1ffffffff183ab6c R12: 0000000000000001
R13: 00000000ffffffff R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32323000 CR3: 000000006d3f0000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.