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virt: vbox: Log unknown ioctl requests as error

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Every now and then upstream adds new ioctls without notifying us,
log unknown ioctl requests as an error to catch these.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200709120858.63928-8-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2020-07-09 14:08:57 +02:00 committed by Greg Kroah-Hartman
parent 316b003540
commit 5bc117a27f
3 changed files with 3 additions and 1 deletions
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2
drivers/virt/vboxguest/vboxguest_core.c
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@ -1739,7 +1739,7 @@ int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
return vbg_ioctl_log(data);
}
vbg_debug("VGDrvCommonIoCtl: Unknown req %#08x\n", req);
vbg_err_ratelimited("Userspace made an unknown ioctl req %#08x\n", req);
return -ENOTTY;
}

1
drivers/virt/vboxguest/vboxguest_utils.c
View File

@ -59,6 +59,7 @@ EXPORT_SYMBOL(name)
VBG_LOG(vbg_info, pr_info);
VBG_LOG(vbg_warn, pr_warn);
VBG_LOG(vbg_err, pr_err);
VBG_LOG(vbg_err_ratelimited, pr_err_ratelimited);
#if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
VBG_LOG(vbg_debug, pr_debug);
#endif

1
include/linux/vbox_utils.h
View File

@ -16,6 +16,7 @@ struct vbg_dev;
__printf(1, 2) void vbg_info(const char *fmt, ...);
__printf(1, 2) void vbg_warn(const char *fmt, ...);
__printf(1, 2) void vbg_err(const char *fmt, ...);
__printf(1, 2) void vbg_err_ratelimited(const char *fmt, ...);
/* Only use backdoor logging for non-dynamic debug builds */
#if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)