[{"id":3687062,"web_url":"http://patchwork.ozlabs.org/comment/3687062/","msgid":"","list_archive_url":null,"date":"2026-05-06T11:25:05","subject":"Re: [PATCH] usb: dwc3: Fix crash on fastboot exit due to incorrect\n memory free","submitter":{"id":85664,"url":"http://patchwork.ozlabs.org/api/people/85664/","name":"Marek Vasut","email":"marek.vasut@mailbox.org"},"content":"On 5/6/26 8:14 AM, Balaji Selvanathan wrote:\n> The dwc3_free_one_event_buffer() function incorrectly called free()\n> on event buffer structures allocated with devm_kzalloc(). This\n> caused heap corruption and a synchronous abort when exiting\n> fastboot mode via \"fastboot continue\".\n> \n> Device-managed memory is automatically freed when the device is\n> removed, so manual deallocation causes the heap allocator to access\n> corrupted metadata.\n> \n> Signed-off-by: Balaji Selvanathan \n> ---\n> drivers/usb/dwc3/core.c | 1 -\n> 1 file changed, 1 deletion(-)\n> \n> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c\n> index 0dee14c8b59..be198041f08 100644\n> --- a/drivers/usb/dwc3/core.c\n> +++ b/drivers/usb/dwc3/core.c\n> @@ -208,7 +208,6 @@ static void dwc3_free_one_event_buffer(struct dwc3 *dwc,\n> \t\tstruct dwc3_event_buffer *evt)\n> {\n> \tdma_free_coherent(evt->buf);\n> -\tfree(evt);\n> }\n> \n> /**\nDoes this need:\n\nFixes: 884b10e86a05 (\"usb: dwc3: core: fix memory leaks in event buffer \ncleanup\")\n\n?","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","X-MBO-RS-META":"18ynjcqdeqdyn4ctf1ygnn1nr99y5uqj","X-MBO-RS-ID":"b13564b8465580f9840","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3687176,"web_url":"http://patchwork.ozlabs.org/comment/3687176/","msgid":"<437a2860-fecf-4f45-bbe4-3fb9e8958b6a@oss.qualcomm.com>","list_archive_url":null,"date":"2026-05-06T15:26:40","subject":"Re: [PATCH] usb: dwc3: Fix crash on fastboot exit due to incorrect\n memory free","submitter":{"id":90810,"url":"http://patchwork.ozlabs.org/api/people/90810/","name":"Balaji Selvanathan","email":"balaji.selvanathan@oss.qualcomm.com"},"content":"On 5/6/2026 4:55 PM, Marek Vasut wrote:\n> On 5/6/26 8:14 AM, Balaji Selvanathan wrote:\n>> The dwc3_free_one_event_buffer() function incorrectly called free()\n>> on event buffer structures allocated with devm_kzalloc(). This\n>> caused heap corruption and a synchronous abort when exiting\n>> fastboot mode via \"fastboot continue\".\n>>\n>> Device-managed memory is automatically freed when the device is\n>> removed, so manual deallocation causes the heap allocator to access\n>> corrupted metadata.\n>>\n>> Signed-off-by: Balaji Selvanathan \n>> ---\n>>   drivers/usb/dwc3/core.c | 1 -\n>>   1 file changed, 1 deletion(-)\n>>\n>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c\n>> index 0dee14c8b59..be198041f08 100644\n>> --- a/drivers/usb/dwc3/core.c\n>> +++ b/drivers/usb/dwc3/core.c\n>> @@ -208,7 +208,6 @@ static void dwc3_free_one_event_buffer(struct \n>> dwc3 *dwc,\n>>           struct dwc3_event_buffer *evt)\n>>   {\n>>       dma_free_coherent(evt->buf);\n>> -    free(evt);\n>>   }\n>>     /**\n> Does this need:\n>\n> Fixes: 884b10e86a05 (\"usb: dwc3: core: fix memory leaks in event \n> buffer cleanup\")\n>\n> ?\n\nHi Marek,\n\nWe remove only \"free(evt)\"; \"free(dwc->ev_buffs);\" from this patch \n(884b10e86a05 \"usb: dwc3: core: fix memory leaks in event buffer \ncleanup\") is needed.\n\nRegards","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=cAF7hC+L;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=JoY2tRBM;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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This\n>>> caused heap corruption and a synchronous abort when exiting\n>>> fastboot mode via \"fastboot continue\".\n>>>\n>>> Device-managed memory is automatically freed when the device is\n>>> removed, so manual deallocation causes the heap allocator to access\n>>> corrupted metadata.\n>>>\n>>> Signed-off-by: Balaji Selvanathan \n>>> ---\n>>>   drivers/usb/dwc3/core.c | 1 -\n>>>   1 file changed, 1 deletion(-)\n>>>\n>>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c\n>>> index 0dee14c8b59..be198041f08 100644\n>>> --- a/drivers/usb/dwc3/core.c\n>>> +++ b/drivers/usb/dwc3/core.c\n>>> @@ -208,7 +208,6 @@ static void dwc3_free_one_event_buffer(struct \n>>> dwc3 *dwc,\n>>>           struct dwc3_event_buffer *evt)\n>>>   {\n>>>       dma_free_coherent(evt->buf);\n>>> -    free(evt);\n>>>   }\n>>>     /**\n>> Does this need:\n>>\n>> Fixes: 884b10e86a05 (\"usb: dwc3: core: fix memory leaks in event \n>> buffer cleanup\")\n>>\n>> ?\n> \n> Hi Marek,\n> \n> We remove only \"free(evt)\"; \"free(dwc->ev_buffs);\" from this patch \n> (884b10e86a05 \"usb: dwc3: core: fix memory leaks in event buffer \n> cleanup\") is needed.\nThe Fixes tag is only a reference for posterity, to trace which previous \ncommit this change repairs. The change itself is fine. Thanks !","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=mailbox.org header.i=@mailbox.org header.a=rsa-sha256\n header.s=mail20150812 header.b=ufs5jC1V;\n\tdkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org\n header.a=rsa-sha256 header.s=mail20150812 header.b=ODjjwbok;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=mailbox.org","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (2048-bit key;\n secure) header.d=mailbox.org header.i=@mailbox.org header.b=\"ufs5jC1V\";\n\tdkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org\n header.b=\"ODjjwbok\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=mailbox.org","phobos.denx.de;\n spf=pass smtp.mailfrom=marek.vasut@mailbox.org","outgoing_mbo_mout;\n dkim=pass header.d=mailbox.org header.s=mail20150812 header.b=ODjjwbok;\n spf=pass (outgoing_mbo_mout: domain of marek.vasut@mailbox.org designates\n 2001:67c:2050:b231:465::1 as permitted sender)\n smtp.mailfrom=marek.vasut@mailbox.org"],"Received":["from phobos.denx.de (phobos.denx.de [85.214.62.61])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g9ywy66fRz1yCg\n\tfor ; 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charset=UTF-8; format=flowed","Content-Transfer-Encoding":"8bit","X-MBO-RS-META":"yt38n31s5ixan7tdp8gcgtn5k661h5ha","X-MBO-RS-ID":"a737ab51929db9914c3","X-Rspamd-Queue-Id":"4g9ywr52Gsz9vJh","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3687489,"web_url":"http://patchwork.ozlabs.org/comment/3687489/","msgid":"<5c6feffa-1f21-45df-ae2e-c313393593cc@oss.qualcomm.com>","list_archive_url":null,"date":"2026-05-07T04:38:56","subject":"Re: [PATCH] usb: dwc3: Fix crash on fastboot exit due to incorrect\n memory free","submitter":{"id":90810,"url":"http://patchwork.ozlabs.org/api/people/90810/","name":"Balaji Selvanathan","email":"balaji.selvanathan@oss.qualcomm.com"},"content":"On 5/6/2026 8:58 PM, Marek Vasut wrote:\n> On 5/6/26 5:26 PM, Balaji Selvanathan wrote:\n>>\n>> On 5/6/2026 4:55 PM, Marek Vasut wrote:\n>>> On 5/6/26 8:14 AM, Balaji Selvanathan wrote:\n>>>> The dwc3_free_one_event_buffer() function incorrectly called free()\n>>>> on event buffer structures allocated with devm_kzalloc(). This\n>>>> caused heap corruption and a synchronous abort when exiting\n>>>> fastboot mode via \"fastboot continue\".\n>>>>\n>>>> Device-managed memory is automatically freed when the device is\n>>>> removed, so manual deallocation causes the heap allocator to access\n>>>> corrupted metadata.\n>>>>\n>>>> Signed-off-by: Balaji Selvanathan \n>>>> \n>>>> ---\n>>>>   drivers/usb/dwc3/core.c | 1 -\n>>>>   1 file changed, 1 deletion(-)\n>>>>\n>>>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c\n>>>> index 0dee14c8b59..be198041f08 100644\n>>>> --- a/drivers/usb/dwc3/core.c\n>>>> +++ b/drivers/usb/dwc3/core.c\n>>>> @@ -208,7 +208,6 @@ static void dwc3_free_one_event_buffer(struct \n>>>> dwc3 *dwc,\n>>>>           struct dwc3_event_buffer *evt)\n>>>>   {\n>>>>       dma_free_coherent(evt->buf);\n>>>> -    free(evt);\n>>>>   }\n>>>>     /**\n>>> Does this need:\n>>>\n>>> Fixes: 884b10e86a05 (\"usb: dwc3: core: fix memory leaks in event \n>>> buffer cleanup\")\n>>>\n>>> ?\n>>\n>> Hi Marek,\n>>\n>> We remove only \"free(evt)\"; \"free(dwc->ev_buffs);\" from this patch \n>> (884b10e86a05 \"usb: dwc3: core: fix memory leaks in event buffer \n>> cleanup\") is needed.\n> The Fixes tag is only a reference for posterity, to trace which \n> previous commit this change repairs. The change itself is fine. Thanks !\n\nHi Marek,\n\nGot it. Thanks for the feedback. Have added fixes tag and respinned: \nhttps://lore.kernel.org/u-boot/20260507-usb-v2-1-3958b8732553@oss.qualcomm.com/\n\nRegards,\n\nBalaji","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=PrAktIaL;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=a9b7VhSP;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=none (p=none dis=none) header.from=oss.qualcomm.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com\n header.b=\"PrAktIaL\";\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.b=\"a9b7VhSP\";\n\tdkim-atps=neutral","phobos.denx.de; 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