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From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Yang Yingliang <yangyingliang@huawei.com>,
	Jian Cheng <cj.chengjian@huawei.com>,
	Nadav Amit <namit@vmware.com>, Jessica Yu <jeyu@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Sekhar Nori <nsekhar@ti.com>, Kevin Hilman <khilman@kernel.org>,
	David Lechner <david@lechnology.com>,
	Adam Ford <aford173@gmail.com>
Subject: [v5.3-rc1 regression] Hitting a kernel BUG() when trying to load a module on DaVinci SoC
Date: Mon, 22 Jul 2019 14:12:51 +0200	[thread overview]
Message-ID: <CAMRc=MdaLPcy4fJOEbcXAriHLHrXUZD6Bh5X2Eq+2OBvcC4cOQ@mail.gmail.com> (raw)

Hi,

with v5.3-rc1 I'm hitting the following BUG() when trying to load the
gpio-backlight module:

kernel BUG at kernel/module.c:1919!
Internal error: Oops - BUG: 0 [#1] PREEMPT ARM
Modules linked in:
CPU: 0 PID: 1 Comm: systemd Tainted: G        W
5.2.0-rc2-00005-g7dabaa5ce05a #19
Hardware name: DaVinci DA850/OMAP-L138/AM18x EVM
PC is at frob_text.constprop.16+0x2c/0x34
LR is at load_module+0x1888/0x21b4
pc : [<c0081bbc>]    lr : [<c0083c4c>]    psr: 20000013
sp : c6837e58  ip : c6b4fa80  fp : bf00574c
r10: c0601008  r9 : bf005740  r8 : c0493e38
r7 : c00807f8  r6 : 00000000  r5 : 00000001  r4 : c6837f38
r3 : 00000fff  r2 : bf000000  r1 : 00004b80  r0 : bf005818
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 0005317f  Table: c6b78000  DAC: 00000051
Process systemd (pid: 1, stack limit = 0x(ptrval))
Stack: (0xc6837e58 to 0xc6838000)
7e40:                                                       bf005740 c6492a90
7e60: 00000001 c6bf5788 00000003 c6837f38 bf0058c0 bf0058a8 bf00a495 c0493e38
7e80: 00000000 c05368c0 00000001 00000000 c0580030 c0574b28 00000000 00000000
7ea0: 00000000 00000000 00000000 00000000 6e72656b 00006c65 00000000 00000000
7ec0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7ee0: 00000000 00000000 00000000 aefb2bb8 7fffffff c0601008 00000000 00000004
7f00: b6cee714 c00091e4 c6836000 00000000 005bc668 c00847b0 7fffffff 00000000
7f20: 00000003 00000000 0000b2d0 c884e000 0000b2d0 00000000 c8852dcb c88533a0
7f40: c884e000 0000b2d0 c8858cb8 c8858b34 c88568d4 000058c0 00006190 000023b8
7f60: 00006713 00000000 00000000 00000000 000023a8 00000024 00000025 00000019
7f80: 0000001d 00000011 00000000 aefb2bb8 00000000 00000000 00000000 00000000
7fa0: 0000017b c0009000 00000000 00000000 00000004 b6cee714 00000000 00000000
7fc0: 00000000 00000000 00000000 0000017b 00000000 00000000 00000001 005bc668
7fe0: be907b00 be907af0 b6ce66b0 b6c3fac0 60000010 00000004 00000000 00000000
[<c0081bbc>] (frob_text.constprop.16) from [<c0083c4c>]
(load_module+0x1888/0x21b4)
[<c0083c4c>] (load_module) from [<c00847b0>] (sys_finit_module+0xbc/0xdc)
[<c00847b0>] (sys_finit_module) from [<c0009000>] (ret_fast_syscall+0x0/0x50)
Exception stack(0xc6837fa8 to 0xc6837ff0)
7fa0:                   00000000 00000000 00000004 b6cee714 00000000 00000000
7fc0: 00000000 00000000 00000000 0000017b 00000000 00000000 00000001 005bc668
7fe0: be907b00 be907af0 b6ce66b0 b6c3fac0
Code: e1a01621 e1a00002 eafe4531 e7f001f2 (e7f001f2)
---[ end trace 2cbefb0005882c52 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
---[ end Kernel panic - not syncing: Attempted to kill init!
exitcode=0x0000000b ]---

I bisected it to commit 06bd260e836d ("modules: fix BUG when load
module with rodata=n") with commit 7dabaa5ce05a ("modules: fix compile
error if don't have strict module rwx") on top to make it build.

Let me know if you need me to provide more info.

Best regards,
Bartosz Golaszewski

             reply	other threads:[~2019-07-22 12:13 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-22 12:12 Bartosz Golaszewski [this message]
2019-07-22 13:05 ` [v5.3-rc1 regression] Hitting a kernel BUG() when trying to load a module on DaVinci SoC Bartosz Golaszewski
2019-07-22 16:10 ` Jessica Yu
2019-07-22 19:38   ` David Lechner
2019-07-23  7:45   ` Bartosz Golaszewski

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