[026/190] Revert "usb: dwc3: pci: Fix reference count leak in dwc3_pci_resume_work"
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Message ID 20210421130105.1226686-27-gregkh@linuxfoundation.org
State New, archived
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Series
  • Revertion of all of the umn.edu commits
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Commit Message

Greg KH April 21, 2021, 12:58 p.m. UTC
This reverts commit 2655971ad4b34e97dd921df16bb0b08db9449df7.

Commits from @umn.edu addresses have been found to be submitted in "bad
faith" to try to test the kernel community's ability to review "known
malicious" changes.  The result of these submissions can be found in a
paper published at the 42nd IEEE Symposium on Security and Privacy
entitled, "Open Source Insecurity: Stealthily Introducing
Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
of Minnesota) and Kangjie Lu (University of Minnesota).

Because of this, all submissions from this group must be reverted from
the kernel tree and will need to be re-reviewed again to determine if
they actually are a valid fix.  Until that work is complete, remove this
change to ensure that no problems are being introduced into the
codebase.

Cc: Aditya Pakki <pakki001@umn.edu>
Cc: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/dwc3-pci.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Comments

Felipe Balbi April 22, 2021, 11:42 a.m. UTC | #1
Hi,

Greg Kroah-Hartman <gregkh@linuxfoundation.org> writes:

> This reverts commit 2655971ad4b34e97dd921df16bb0b08db9449df7.
>
> Commits from @umn.edu addresses have been found to be submitted in "bad
> faith" to try to test the kernel community's ability to review "known
> malicious" changes.  The result of these submissions can be found in a
> paper published at the 42nd IEEE Symposium on Security and Privacy
> entitled, "Open Source Insecurity: Stealthily Introducing
> Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> of Minnesota) and Kangjie Lu (University of Minnesota).
>
> Because of this, all submissions from this group must be reverted from
> the kernel tree and will need to be re-reviewed again to determine if
> they actually are a valid fix.  Until that work is complete, remove this
> change to ensure that no problems are being introduced into the
> codebase.
>
> Cc: Aditya Pakki <pakki001@umn.edu>
> Cc: Felipe Balbi <balbi@kernel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
>  drivers/usb/dwc3/dwc3-pci.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
> index 4c5c6972124a..0c0619f7b1a7 100644
> --- a/drivers/usb/dwc3/dwc3-pci.c
> +++ b/drivers/usb/dwc3/dwc3-pci.c
> @@ -226,10 +226,8 @@ static void dwc3_pci_resume_work(struct work_struct *work)
>  	int ret;
>  
>  	ret = pm_runtime_get_sync(&dwc3->dev);
> -	if (ret) {
> -		pm_runtime_put_sync_autosuspend(&dwc3->dev);
> +	if (ret)
>  		return;
> -	}

this was a valid fix. pm_runtime_get_sync() leaves an unbalanced get on
the runtime usage counter.

It's okay if you prefer to revert it and have a new review cycle for
this, though.
Greg KH April 26, 2021, 4:57 p.m. UTC | #2
On Thu, Apr 22, 2021 at 02:42:01PM +0300, Felipe Balbi wrote:
> 
> Hi,
> 
> Greg Kroah-Hartman <gregkh@linuxfoundation.org> writes:
> 
> > This reverts commit 2655971ad4b34e97dd921df16bb0b08db9449df7.
> >
> > Commits from @umn.edu addresses have been found to be submitted in "bad
> > faith" to try to test the kernel community's ability to review "known
> > malicious" changes.  The result of these submissions can be found in a
> > paper published at the 42nd IEEE Symposium on Security and Privacy
> > entitled, "Open Source Insecurity: Stealthily Introducing
> > Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> > of Minnesota) and Kangjie Lu (University of Minnesota).
> >
> > Because of this, all submissions from this group must be reverted from
> > the kernel tree and will need to be re-reviewed again to determine if
> > they actually are a valid fix.  Until that work is complete, remove this
> > change to ensure that no problems are being introduced into the
> > codebase.
> >
> > Cc: Aditya Pakki <pakki001@umn.edu>
> > Cc: Felipe Balbi <balbi@kernel.org>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > ---
> >  drivers/usb/dwc3/dwc3-pci.c | 4 +---
> >  1 file changed, 1 insertion(+), 3 deletions(-)
> >
> > diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
> > index 4c5c6972124a..0c0619f7b1a7 100644
> > --- a/drivers/usb/dwc3/dwc3-pci.c
> > +++ b/drivers/usb/dwc3/dwc3-pci.c
> > @@ -226,10 +226,8 @@ static void dwc3_pci_resume_work(struct work_struct *work)
> >  	int ret;
> >  
> >  	ret = pm_runtime_get_sync(&dwc3->dev);
> > -	if (ret) {
> > -		pm_runtime_put_sync_autosuspend(&dwc3->dev);
> > +	if (ret)
> >  		return;
> > -	}
> 
> this was a valid fix. pm_runtime_get_sync() leaves an unbalanced get on
> the runtime usage counter.
> 
> It's okay if you prefer to revert it and have a new review cycle for
> this, though.

I'll drop this revert now, thanks for the review.

greg k-h

Patch
diff mbox series

diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 4c5c6972124a..0c0619f7b1a7 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -226,10 +226,8 @@  static void dwc3_pci_resume_work(struct work_struct *work)
 	int ret;
 
 	ret = pm_runtime_get_sync(&dwc3->dev);
-	if (ret) {
-		pm_runtime_put_sync_autosuspend(&dwc3->dev);
+	if (ret)
 		return;
-	}
 
 	pm_runtime_mark_last_busy(&dwc3->dev);
 	pm_runtime_put_sync_autosuspend(&dwc3->dev);