From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0F632FD681; Sun, 1 Mar 2026 01:52:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772329927; cv=none; b=qp5XRbHL7USvITKP2M57vBZ0BZ7HG+Yd4A2GMP/YHv6aJbFuUFZ7Ql1WMLmylOSDvCZDHPgNKDe7ZPuGG16hpDdEn+KLIw28vQsNBMIDayxfd5V2AyK9eiF4FQoTfDFxQ9Umga0gbzKIu2+Nk8+2qN9nS0IS9kmp0CDQkkORCJo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772329927; c=relaxed/simple; bh=LHfIDL0Od71IQy3hvBFo2VaqVj3BGoqhdpEsekWeTP4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Pvp+kN6zOiV6nwYe/CO9yLXpImY4Gr3TKpEeHxxq0UsM3lJo//vt/X88zlV1LbmxJXspjx3xPn1gx/E9KtCenoBCSpxYRWcwib2ujdubfMRgLtuxX18Xy0o6Sh0DwgsYma1O+alT7A4egDMhh9IILVGHoQnz7W0SdIDMr+zahfg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O3z3mEad; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="O3z3mEad" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA455C19421; Sun, 1 Mar 2026 01:52:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772329927; bh=LHfIDL0Od71IQy3hvBFo2VaqVj3BGoqhdpEsekWeTP4=; h=From:To:Cc:Subject:Date:From; b=O3z3mEadgsZM05alBUe0KLPmyx+MuJ+ELLWGYNiGYS8RE0FcfNcESXAqm5yupBuj/ gAem9SRzBPnsDkRxo05EuQyQ3oQMuq+4Rvfr0urZ9Jv9L9BabLBdGQ24FM9oaoDz4S WMImLrh9eRawhLnojGh2+vl6UZTZuzwVZYBBC4PyTfrV7FSiNZyWUp6JYqvKaJ5avD yywsNuFgFlB7Yg7JiXHRGaWXHId2OvxgH0CAFsQpULmMUXtKmWMM69G8kfUOMK9qdz 716tXEqgQEiRD3xSZzr5giJ+xxHZOD37gFguUxlsAPVeYR0vdq72VCEUQJicZy2XzK vtoRzqBbXjSNw== From: Sasha Levin To: stable@vger.kernel.org, mmaddireddy@nvidia.com Cc: Manivannan Sadhasivam , Bjorn Helgaas , Niklas Cassel , Frank Li , linux-pci@vger.kernel.org Subject: FAILED: Patch "PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions" failed to apply to 5.15-stable tree Date: Sat, 28 Feb 2026 20:52:05 -0500 Message-ID: <20260301015205.1718530-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Hint: ignore X-stable: review Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8 Mon Sep 17 00:00:00 2001 From: Manikanta Maddireddy Date: Thu, 8 Jan 2026 11:57:47 +0530 Subject: [PATCH] PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions struct configfs_item_operations callbacks are defined like the following: int (*allow_link)(struct config_item *src, struct config_item *target); void (*drop_link)(struct config_item *src, struct config_item *target); While pci_primary_epc_epf_link() and pci_secondary_epc_epf_link() specify the parameters in the correct order, pci_primary_epc_epf_unlink() and pci_secondary_epc_epf_unlink() specify the parameters in the wrong order, leading to the below kernel crash when using the unlink command in configfs: Unable to handle kernel paging request at virtual address 0000000300000857 Mem abort info: ... pc : string+0x54/0x14c lr : vsnprintf+0x280/0x6e8 ... string+0x54/0x14c vsnprintf+0x280/0x6e8 vprintk_default+0x38/0x4c vprintk+0xc4/0xe0 pci_epf_unbind+0xdc/0x108 configfs_unlink+0xe0/0x208+0x44/0x74 vfs_unlink+0x120/0x29c __arm64_sys_unlinkat+0x3c/0x90 invoke_syscall+0x48/0x134 do_el0_svc+0x1c/0x30prop.0+0xd0/0xf0 Fixes: e85a2d783762 ("PCI: endpoint: Add support in configfs to associate two EPCs with EPF") Signed-off-by: Manikanta Maddireddy [mani: cced stable, changed commit message as per https://lore.kernel.org/linux-pci/aV9joi3jF1R6ca02@ryzen] Signed-off-by: Manivannan Sadhasivam Signed-off-by: Bjorn Helgaas Reviewed-by: Niklas Cassel Reviewed-by: Frank Li Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260108062747.1870669-1-mmaddireddy@nvidia.com --- drivers/pci/endpoint/pci-ep-cfs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/pci/endpoint/pci-ep-cfs.c b/drivers/pci/endpoint/pci-ep-cfs.c index 43feb6139fa36..8b392a8363bb1 100644 --- a/drivers/pci/endpoint/pci-ep-cfs.c +++ b/drivers/pci/endpoint/pci-ep-cfs.c @@ -68,8 +68,8 @@ static int pci_secondary_epc_epf_link(struct config_item *epf_item, return 0; } -static void pci_secondary_epc_epf_unlink(struct config_item *epc_item, - struct config_item *epf_item) +static void pci_secondary_epc_epf_unlink(struct config_item *epf_item, + struct config_item *epc_item) { struct pci_epf_group *epf_group = to_pci_epf_group(epf_item->ci_parent); struct pci_epc_group *epc_group = to_pci_epc_group(epc_item); @@ -132,8 +132,8 @@ static int pci_primary_epc_epf_link(struct config_item *epf_item, return 0; } -static void pci_primary_epc_epf_unlink(struct config_item *epc_item, - struct config_item *epf_item) +static void pci_primary_epc_epf_unlink(struct config_item *epf_item, + struct config_item *epc_item) { struct pci_epf_group *epf_group = to_pci_epf_group(epf_item->ci_parent); struct pci_epc_group *epc_group = to_pci_epc_group(epc_item); -- 2.51.0