On 3.4.2023. 9:24, Greg KH wrote:

On Mon, Apr 03, 2023 at 09:17:21AM +0200, Mirsad Goran Todorovac wrote:

...

Hi, Mathias!

On 30.3.2023. 16:30, Mathias Nyman wrote:

...

The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing.

Reported-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Link: https://lore.kernel.org/linux-usb/24263902-c9b3-ce29-237b-1c3d6918f4fe@alu.u... Tested-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command") Cc: Stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

---

drivers/usb/host/xhci.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bdb6dd819a3b..6307bae9cddf 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4442,6 +4442,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci, if (!virt_dev || max_exit_latency == virt_dev->current_mel) { spin_unlock_irqrestore(&xhci->lock, flags);

• xhci_free_command(xhci, command);
  return 0;
  

  }

There seems to be a problem with applying this patch with "git am", as it gives the following:

commit ff9de97baa02cb9362b7cb81e95bc9be424cab89 Author: @ <@> Date: Mon Apr 3 08:42:33 2023 +0200

 The command allocated to set exit latency LPM values need to be freed in
 case the command is never queued. This would be the case if there is no
 change in exit latency values, or device is missing.

 Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command")
 Cc: <Stable@vger.kernel.org>
 Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>

This is already commit f6caea485555 ("xhci: Free the command allocated for setting LPM if we return early") in Linus's tree, do you not see it there?

And how exactly did you save the message to apply it with 'git am'? It worked for me.

thanks,

greg k-h

git am ../mathias-xhci.mail

mtodorov@domac:~/linux/kernel/linux_torvalds$ cat ../mathias-xhci.mail From: Mathias Nyman @ 2023-03-27 9:50 UTC (permalink / raw) To: mirsad.todorovac, linux-usb, linux-kernel Cc: gregkh, ubuntu-devel-discuss, stern, arnd, Mathias Nyman, Stable

The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing.

Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command") Cc: Stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com --- drivers/usb/host/xhci.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bdb6dd819a3b..6307bae9cddf 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4442,6 +4442,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,

if (!virt_dev || max_exit_latency == virt_dev->current_mel) { spin_unlock_irqrestore(&xhci->lock, flags); + xhci_free_command(xhci, command); return 0; }

-- 2.25.1

Sorry, no commit f6caea485555 in the "git pull":

mtodorov@domac:~/linux/kernel/linux_torvalds$ git log --oneline | grep f6caea485555 mtodorov@domac:~/linux/kernel/linux_torvalds$ git log --oneline | head -10 10de4cefccf7 memstick: fix memory leak if card device is never registered feeedf59897c platform/x86: think-lmi: Clean up display of current_value on Thinkstation 86cebdbfb8d2 platform/x86: think-lmi: Fix memory leaks when parsing ThinkStation WMI strings ff9de97baa02 The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing. 2ac6d07f1a81 platform/x86: think-lmi: Fix memory leak when showing current settings 7e364e56293b Linux 6.3-rc5 6ab608fe852b Merge tag 'for-6.3-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux f95b8ea79c47 Revert "venus: firmware: Correct non-pix start and end addresses" a10ca0950afe Merge tag 'driver-core-6.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core 95d0b9d89d78 Merge tag 'powerpc-6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux You have mail in /var/mail/mtodorov mtodorov@domac:~/linux/kernel/linux_torvalds$

I don't see it here either. But it is not critical (no security issue).

Have a nice day!

Best regards, Mirsad

On Mon, Apr 03, 2023 at 10:01:22AM +0200, Mirsad Goran Todorovac wrote:

On 3.4.2023. 9:57, Mirsad Goran Todorovac wrote:

...

On 3.4.2023. 9:24, Greg KH wrote:

...

On Mon, Apr 03, 2023 at 09:17:21AM +0200, Mirsad Goran Todorovac wrote:

...

Hi, Mathias!

On 30.3.2023. 16:30, Mathias Nyman wrote:

...

The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing.

Reported-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Link: https://lore.kernel.org/linux-usb/24263902-c9b3-ce29-237b-1c3d6918f4fe@alu.u... Tested-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command") Cc: Stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

---

drivers/usb/host/xhci.c | 1 +    1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bdb6dd819a3b..6307bae9cddf 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4442,6 +4442,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,        if (!virt_dev || max_exit_latency == virt_dev->current_mel) {            spin_unlock_irqrestore(&xhci->lock, flags); +        xhci_free_command(xhci, command);            return 0;        }

There seems to be a problem with applying this patch with "git am", as it gives the following:

commit ff9de97baa02cb9362b7cb81e95bc9be424cab89 Author: @ <@> Date:   Mon Apr 3 08:42:33 2023 +0200

The command allocated to set exit latency LPM values need to be freed in      case the command is never queued. This would be the case if there is no      change in exit latency values, or device is missing.

Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command")      Cc: Stable@vger.kernel.org      Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

This is already commit f6caea485555 ("xhci: Free the command allocated for setting LPM if we return early") in Linus's tree, do you not see it there?

And how exactly did you save the message to apply it with 'git am'?  It worked for me.

thanks,

greg k-h

git am ../mathias-xhci.mail

mtodorov@domac:~/linux/kernel/linux_torvalds$ cat ../mathias-xhci.mail From: Mathias Nyman @ 2023-03-27  9:50 UTC (permalink / raw)   To: mirsad.todorovac, linux-usb, linux-kernel   Cc: gregkh, ubuntu-devel-discuss, stern, arnd, Mathias Nyman, Stable

The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing.

Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command") Cc: Stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

That is very odd, your mail program is not getting the full mbox information here at all. Try downloading it from lore.kernel.org as a raw message: https://lore.kernel.org/all/20230330143056.1390020-4-mathias.nyman@linux.int... and applying that?

...

---

drivers/usb/host/xhci.c | 1 +  1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bdb6dd819a3b..6307bae9cddf 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4442,6 +4442,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,

if (!virt_dev || max_exit_latency == virt_dev->current_mel) {                 spin_unlock_irqrestore(&xhci->lock, flags); +               xhci_free_command(xhci, command);                 return 0;         }

-- 2.25.1

Sorry, no commit f6caea485555 in the "git pull":

mtodorov@domac:~/linux/kernel/linux_torvalds$ git log --oneline | grep f6caea485555 mtodorov@domac:~/linux/kernel/linux_torvalds$ git log --oneline | head -10 10de4cefccf7 memstick: fix memory leak if card device is never registered feeedf59897c platform/x86: think-lmi: Clean up display of current_value on Thinkstation 86cebdbfb8d2 platform/x86: think-lmi: Fix memory leaks when parsing ThinkStation WMI strings ff9de97baa02 The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing. 2ac6d07f1a81 platform/x86: think-lmi: Fix memory leak when showing current settings 7e364e56293b Linux 6.3-rc5 6ab608fe852b Merge tag 'for-6.3-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux f95b8ea79c47 Revert "venus: firmware: Correct non-pix start and end addresses" a10ca0950afe Merge tag 'driver-core-6.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core 95d0b9d89d78 Merge tag 'powerpc-6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux You have mail in /var/mail/mtodorov mtodorov@domac:~/linux/kernel/linux_torvalds$

I don't see it here either. But it is not critical (no security issue).

Have a nice day!

P.S.

Correction.

Yes, I found it here:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

"Notice: this object is not reachable from any branch."

I see Murphy's law in action :-)

Ah, sorry, no, my fault, it's in my usb.git tree and hasn't been sent to Linus yet, that will happen later this week. It is also in the linux-next tree if you want to look there.

thanks,

greg k-h

On 3.4.2023. 10:28, Greg KH wrote:

On Mon, Apr 03, 2023 at 10:01:22AM +0200, Mirsad Goran Todorovac wrote:

...

On 3.4.2023. 9:57, Mirsad Goran Todorovac wrote:

...

On 3.4.2023. 9:24, Greg KH wrote:

...

On Mon, Apr 03, 2023 at 09:17:21AM +0200, Mirsad Goran Todorovac wrote:

...

Hi, Mathias!

On 30.3.2023. 16:30, Mathias Nyman wrote:

...

The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing.

Reported-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Link: https://lore.kernel.org/linux-usb/24263902-c9b3-ce29-237b-1c3d6918f4fe@alu.u... Tested-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command") Cc: Stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

---

drivers/usb/host/xhci.c | 1 +    1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bdb6dd819a3b..6307bae9cddf 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4442,6 +4442,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,        if (!virt_dev || max_exit_latency == virt_dev->current_mel) {            spin_unlock_irqrestore(&xhci->lock, flags); +        xhci_free_command(xhci, command);            return 0;        }

There seems to be a problem with applying this patch with "git am", as it gives the following:

commit ff9de97baa02cb9362b7cb81e95bc9be424cab89 Author: @ <@> Date:   Mon Apr 3 08:42:33 2023 +0200

The command allocated to set exit latency LPM values need to be freed in      case the command is never queued. This would be the case if there is no      change in exit latency values, or device is missing.

Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command")      Cc: Stable@vger.kernel.org      Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

This is already commit f6caea485555 ("xhci: Free the command allocated for setting LPM if we return early") in Linus's tree, do you not see it there?

And how exactly did you save the message to apply it with 'git am'?  It worked for me.

thanks,

greg k-h

git am ../mathias-xhci.mail

mtodorov@domac:~/linux/kernel/linux_torvalds$ cat ../mathias-xhci.mail From: Mathias Nyman @ 2023-03-27  9:50 UTC (permalink / raw)   To: mirsad.todorovac, linux-usb, linux-kernel   Cc: gregkh, ubuntu-devel-discuss, stern, arnd, Mathias Nyman, Stable

The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing.

Fixes: 5c2a380a5aa8 ("xhci: Allocate separate command structures for each LPM command") Cc: Stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com

That is very odd, your mail program is not getting the full mbox information here at all. Try downloading it from lore.kernel.org as a raw message: https://lore.kernel.org/all/20230330143056.1390020-4-mathias.nyman@linux.int... and applying that?

...

...

---

drivers/usb/host/xhci.c | 1 +  1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bdb6dd819a3b..6307bae9cddf 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4442,6 +4442,7 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,

if (!virt_dev || max_exit_latency == virt_dev->current_mel) {                 spin_unlock_irqrestore(&xhci->lock, flags); +               xhci_free_command(xhci, command);                 return 0;         }

-- 2.25.1

Sorry, no commit f6caea485555 in the "git pull":

mtodorov@domac:~/linux/kernel/linux_torvalds$ git log --oneline | grep f6caea485555 mtodorov@domac:~/linux/kernel/linux_torvalds$ git log --oneline | head -10 10de4cefccf7 memstick: fix memory leak if card device is never registered feeedf59897c platform/x86: think-lmi: Clean up display of current_value on Thinkstation 86cebdbfb8d2 platform/x86: think-lmi: Fix memory leaks when parsing ThinkStation WMI strings ff9de97baa02 The command allocated to set exit latency LPM values need to be freed in case the command is never queued. This would be the case if there is no change in exit latency values, or device is missing. 2ac6d07f1a81 platform/x86: think-lmi: Fix memory leak when showing current settings 7e364e56293b Linux 6.3-rc5 6ab608fe852b Merge tag 'for-6.3-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux f95b8ea79c47 Revert "venus: firmware: Correct non-pix start and end addresses" a10ca0950afe Merge tag 'driver-core-6.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core 95d0b9d89d78 Merge tag 'powerpc-6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux You have mail in /var/mail/mtodorov mtodorov@domac:~/linux/kernel/linux_torvalds$

I don't see it here either. But it is not critical (no security issue).

Have a nice day!

P.S.

Correction.

Yes, I found it here:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

"Notice: this object is not reachable from any branch."

I see Murphy's law in action :-)

Ah, sorry, no, my fault, it's in my usb.git tree and hasn't been sent to Linus yet, that will happen later this week. It is also in the linux-next tree if you want to look there.

thanks,

Not at all. Thank you for the hint for the new Lore link.

The new build also compiled w/o problems and the leak appears patched in the original setting that triggered it in the first place:

[root@pc-mtodorov kernel]# uname -rms Linux 6.3.0-rc5-mt-20230401-00007-g268a637be362 x86_64 [root@pc-mtodorov kernel]# echo scan > /sys/kernel/debug/kmemleak [root@pc-mtodorov kernel]# cat /sys/kernel/debug/kmemleak [root@pc-mtodorov kernel]# echo scan > /sys/kernel/debug/kmemleak [root@pc-mtodorov kernel]# cat /sys/kernel/debug/kmemleak [root@pc-mtodorov kernel]# echo scan > /sys/kernel/debug/kmemleak [root@pc-mtodorov kernel]# cat /sys/kernel/debug/kmemleak [root@pc-mtodorov kernel]#

However, there is a lot of homework to catch up on the Linux kernel drivers for me ... This was beginner's luck to find.

Given enough time and at high enough improbability level, a bunch of monkeys could have found it ;-)

Regards, Mirsad