linux-kernel - panic with 9facc33687 "bpf: reject any prog that failed read-only lock"

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Message-Id: <alpine.LFD.2.21.1806231116400.1746@schleppi>
Date:   Sat, 23 Jun 2018 11:23:06 +0200 (CEST)
From:   Sebastian Ott <sebott@...ux.ibm.com>
To:     Daniel Borkmann <daniel@...earbox.net>
cc:     Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: panic with 9facc33687 "bpf: reject any prog that failed read-only
 lock"

With commit 9facc33687 ("bpf: reject any prog that failed read-only lock")
s390 panics:

¢    9.090218! specification exception: 0006 ilc:1 ¢#1! PREEMPT SMP
¢    9.090257! Modules linked in:
¢    9.090277! CPU: 2 PID: 162 Comm: (journald) Not tainted 4.18.0-rc1-00189-g894b8c000ae6 #256
¢    9.090285! Hardware name: IBM 3906 M04 704 (LPAR)
¢    9.090296! Krnl PSW : (____ptrval____) (____ptrval____) (0x3ff80002da1)
¢    9.090320!            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 RI:0 EA:3
¢    9.090336! Krnl GPRS: 0000000000000000 000003e0887f3000 00000000c15dbda8 000003e0887f3038
¢    9.090346!            000003ff80002d9f 0000000000000001 000003ff92f28f50 000002aa1b416350
¢    9.090355!            0000000000000570 00000000c15dbe28 00000000c15dbda8 000000007fff0000
¢    9.090364!            00000000c11ac178 0000000000002738 000000000024c8d2 00000000c15dbd08
¢    9.090376! Krnl Code: Bad PSW.
¢    9.090387! Call Trace:
¢    9.090401! (¢<000000000024c8b8>! seccomp_run_filters+0x50/0xc0)
¢    9.090412!  ¢<000000000024cb38>! __seccomp_filter+0x40/0x478 
¢    9.090426!  ¢<0000000000108362>! do_syscall_trace_enter+0xe2/0x310 
¢    9.090439!  ¢<0000000000baec9c>! system_call+0x284/0x2d0 
¢    9.090453! INFO: lockdep is turned off.
¢    9.090464! Last Breaking-Event-Address:
¢    9.090475!  ¢<000000000024c8d0>! seccomp_run_filters+0x68/0xc0
¢    9.090491!  
¢    9.090503! Kernel panic - not syncing: Fatal exception: panic_on_oops

config and bisect log attached.

Regards,
Sebastian
View attachment "bisect.log" of type "text/plain" (1542 bytes)

View attachment "config" of type "text/plain" (71721 bytes)