From: Petr Mladek <pmladek@suse.com>
To: Rong Tao <rtoax@foxmail.com>
Cc: will@kernel.org, prasad@linux.vnet.ibm.com, tglx@linutronix.de,
gregkh@linuxfoundation.org, frederic@kernel.org,
qperret@google.com, ast@kernel.org, mbenes@suse.cz,
rongtao@cestc.cn, open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] samples/hw_breakpoint: Fix kernel BUG 'invalid opcode: 0000'
Date: Mon, 17 Apr 2023 11:38:05 +0200 [thread overview]
Message-ID: <ZD0TfQHWQftNvFNA@alley> (raw)
In-Reply-To: <tencent_D547A5F2B576141E11CCA04308252BE61205@qq.com>
On Sun 2023-04-16 23:05:17, Rong Tao wrote:
> From: Rong Tao <rongtao@cestc.cn>
>
> Macro symbol_put() is defined as __symbol_put(__stringify(x))
>
> ksym_name = "jiffies"
> symbol_put(ksym_name)
>
> will be resolved as
>
> __symbol_put("ksym_name")
>
> which is clearly wrong. So symbol_put must be replaced with __symbol_put.
>
> When we uninstall hw_breakpoint.ko (rmmod), a kernel bug occurs with the
> following error:
>
> [11381.854152] kernel BUG at kernel/module/main.c:779!
> [11381.854159] invalid opcode: 0000 [#2] PREEMPT SMP PTI
> [11381.854163] CPU: 8 PID: 59623 Comm: rmmod Tainted: G D OE 6.2.9-200.fc37.x86_64 #1
> [11381.854167] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./B360M-HDV, BIOS P3.20 10/23/2018
> [11381.854169] RIP: 0010:__symbol_put+0xa2/0xb0
> [11381.854175] Code: 00 e8 92 d2 f7 ff 65 8b 05 c3 2f e6 78 85 c0 74 1b 48 8b 44 24 30 65 48 2b 04 25 28 00 00 00 75 12 48 83 c4 38 c3 cc cc cc cc <0f> 0b 0f 1f 44 00 00 eb de e8 c0 df d8 00 90 90 90 90 90 90 90 90
> [11381.854178] RSP: 0018:ffffad8ec6ae7dd0 EFLAGS: 00010246
> [11381.854181] RAX: 0000000000000000 RBX: ffffffffc1fd1240 RCX: 000000000000000c
> [11381.854184] RDX: 000000000000006b RSI: ffffffffc02bf7c7 RDI: ffffffffc1fd001c
> [11381.854186] RBP: 000055a38b76e7c8 R08: ffffffff871ccfe0 R09: 0000000000000000
> [11381.854188] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
> [11381.854190] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
> [11381.854192] FS: 00007fbf7c62c740(0000) GS:ffff8c5badc00000(0000) knlGS:0000000000000000
> [11381.854195] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [11381.854197] CR2: 000055a38b7793f8 CR3: 0000000363e1e001 CR4: 00000000003726e0
> [11381.854200] DR0: ffffffffb3407980 DR1: 0000000000000000 DR2: 0000000000000000
> [11381.854202] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [11381.854204] Call Trace:
> [11381.854207] <TASK>
> [11381.854212] s_module_exit+0xc/0xff0 [symbol_getput]
> [11381.854219] __do_sys_delete_module.constprop.0+0x198/0x2f0
> [11381.854225] do_syscall_64+0x58/0x80
> [11381.854231] ? exit_to_user_mode_prepare+0x180/0x1f0
> [11381.854237] ? syscall_exit_to_user_mode+0x17/0x40
> [11381.854241] ? do_syscall_64+0x67/0x80
> [11381.854245] ? syscall_exit_to_user_mode+0x17/0x40
> [11381.854248] ? do_syscall_64+0x67/0x80
> [11381.854252] ? exc_page_fault+0x70/0x170
> [11381.854256] entry_SYSCALL_64_after_hwframe+0x72/0xdc
>
> Signed-off-by: Rong Tao <rongtao@cestc.cn>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Best Regards,
Petr
next prev parent reply other threads:[~2023-04-17 9:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-16 15:05 Rong Tao
2023-04-17 9:38 ` Petr Mladek [this message]
2023-07-24 10:47 Rong Tao
2023-07-24 12:59 ` Petr Mladek
2023-07-24 19:16 ` Luis Chamberlain
2023-07-25 13:38 ` Rong Tao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZD0TfQHWQftNvFNA@alley \
--to=pmladek@suse.com \
--cc=ast@kernel.org \
--cc=frederic@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mbenes@suse.cz \
--cc=prasad@linux.vnet.ibm.com \
--cc=qperret@google.com \
--cc=rongtao@cestc.cn \
--cc=rtoax@foxmail.com \
--cc=tglx@linutronix.de \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®