Messages in this thread Patch in this message | | | Date | Wed, 20 Mar 2019 15:13:53 -0400 | From | Steven Rostedt <> | Subject | Re: dell_smbios KASAN bug |
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On Wed, 20 Mar 2019 14:05:49 -0500 Tom Zanussi <tzanussi@gmail.com> wrote:
> On Wed, 2019-03-20 at 14:41 -0400, Steven Rostedt wrote: > > On Wed, 20 Mar 2019 13:29:20 -0500 > > Tom Zanussi <tzanussi@gmail.com> wrote: > > > > > Hi, > > > > > > While looking into an unrelated problem, I hit this KASAN use- > > > after- > > > free warning, so thought I'd let you know. > > > > > > I have no idea how to fix it, but let me know if you need more > > > info. > > > > > > > Could you run with debug in the kernel command line, and see if you > > hit > > any failed messages from the dell_smbios_init() call? > > > > Not much, but this looks relevant: > > [ 26.783749] dell_smbios: No SMBIOS backends available (wmi: -19, > smm: -19) > [ 26.963648] dell_smbios: No dell-smbios drivers are loaded >
And does this fix you problem?
-- Steve
diff --git a/drivers/platform/x86/dell-smbios-base.c b/drivers/platform/x86/dell-smbios-base.c index 9dc282ed5a9e..c3825c674522 100644 --- a/drivers/platform/x86/dell-smbios-base.c +++ b/drivers/platform/x86/dell-smbios-base.c @@ -619,6 +619,7 @@ static int __init dell_smbios_init(void) fail_platform_driver: kfree(da_tokens); + da_num_tokens = 0; return ret; }
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