linux-kernel - Re: [PROBLEM]: WARNING: lock held when returning to user space! (5.4.1 #16 Tainted: G )

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Date:   Mon, 9 Dec 2019 10:34:32 +0000
From:   Will Deacon <will@...nel.org>
To:     Jeffrin Jose <jeffrin@...agiritech.edu.in>
Cc:     peterz@...radead.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org,
        peterhuewe@....de, jarkko.sakkinen@...ux.intel.com, jgg@...pe.ca
Subject: Re: [PROBLEM]:  WARNING: lock held when returning to user space!
 (5.4.1 #16 Tainted: G )

Hi,

[expanding cc list]

On Sat, Dec 07, 2019 at 11:04:20PM +0530, Jeffrin Jose wrote:
> i got the following  output related from typical dmesg output from 5.4.1 kernel

Was this during boot or during some other operation?

> ================================================
> WARNING: lock held when returning to user space!
> 5.4.1 #16 Tainted: G            E    
> ------------------------------------------------
> tpm2-abrmd/691 is leaving the kernel with locks still held!
> 2 locks held by tpm2-abrmd/691:
>  #0: ffff8881ee784ba8 (&chip->ops_sem){.+.+}, at: tpm_try_get_ops+0x2b/0xc0 [tpm]
>  #1: ffff8881ee784d88 (&chip->tpm_mutex){+.+.}, at: tpm_try_get_ops+0x57/0xc0 [tpm]

Can you reproduce this failure on v5.5-rc1?

Thanks,

Will