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 DECB434DCC3; Tue, 26 Aug 2025 13:57:04 +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=1756216625; cv=none; b=fUBU6B3QSvu5CSLTOs5qA16TpPcBVFYfoGrYVEgLndm44gEIuvY1+r/t7EMBXTlgz0EvXkfXzlmRFUDrmB+fG17iX/hSJrHUKm1ojuspii5EVqVmy1zpBJE8Cubc+OecIO8rdcPv6g+aqimjmRXP1XusYj4agfsPP9W2T7ELR3A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216625; c=relaxed/simple; bh=2mRogVjEvW7YIZP4hGukKUqyAUTDpxDispERX8nLckU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XgGEZY0LrditNxVQneH7yNduo+ZmXjmBJlF9zDKcn/eQGGtXC01JVfkyMWDaiEYelj2Q8Bt57PByXWFplwcY5oLehY/bXG8oky9gJgudy0dnSntm7iwlAoE57aPBMXHemMqK0wzGb1ZrxgjPfTOXPp01n5kJ9t9BMSUecng0ep0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Wz5DToBk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Wz5DToBk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6DA9AC113CF; Tue, 26 Aug 2025 13:57:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216624; bh=2mRogVjEvW7YIZP4hGukKUqyAUTDpxDispERX8nLckU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wz5DToBkBgbQ5GTlOFbNfy7eyx0tPtlVsbbzc/1nOurJnc3ADxhR4kr1FQZwt51v3 2puKyFGX0xgrn8dEuKYCSMpXDuELEDOA+VvhEW6f/V0vcP/9JOkfot77QUpzb3S1ti xpLuNS1uTN8NXyCcyQKUby/FbaP0lePHl6992XfI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Damien Le Moal , Manivannan Sadhasivam , Niklas Cassel Subject: [PATCH 5.15 482/644] PCI: endpoint: Fix configfs group list head handling Date: Tue, 26 Aug 2025 13:09:33 +0200 Message-ID: <20250826110958.429689727@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Damien Le Moal commit d79123d79a8154b4318529b7b2ff7e15806f480b upstream. Doing a list_del() on the epf_group field of struct pci_epf_driver in pci_epf_remove_cfs() is not correct as this field is a list head, not a list entry. This list_del() call triggers a KASAN warning when an endpoint function driver which has a configfs attribute group is torn down: ================================================================== BUG: KASAN: slab-use-after-free in pci_epf_remove_cfs+0x17c/0x198 Write of size 8 at addr ffff00010f4a0d80 by task rmmod/319 CPU: 3 UID: 0 PID: 319 Comm: rmmod Not tainted 6.16.0-rc2 #1 NONE Hardware name: Radxa ROCK 5B (DT) Call trace: show_stack+0x2c/0x84 (C) dump_stack_lvl+0x70/0x98 print_report+0x17c/0x538 kasan_report+0xb8/0x190 __asan_report_store8_noabort+0x20/0x2c pci_epf_remove_cfs+0x17c/0x198 pci_epf_unregister_driver+0x18/0x30 nvmet_pci_epf_cleanup_module+0x24/0x30 [nvmet_pci_epf] __arm64_sys_delete_module+0x264/0x424 invoke_syscall+0x70/0x260 el0_svc_common.constprop.0+0xac/0x230 do_el0_svc+0x40/0x58 el0_svc+0x48/0xdc el0t_64_sync_handler+0x10c/0x138 el0t_64_sync+0x198/0x19c ... Remove this incorrect list_del() call from pci_epf_remove_cfs(). Fixes: ef1433f717a2 ("PCI: endpoint: Create configfs entry for each pci_epf_device_id table entry") Signed-off-by: Damien Le Moal Signed-off-by: Manivannan Sadhasivam Reviewed-by: Niklas Cassel Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250624114544.342159-2-dlemoal@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/endpoint/pci-epf-core.c | 1 - 1 file changed, 1 deletion(-) --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -343,7 +343,6 @@ static void pci_epf_remove_cfs(struct pc mutex_lock(&pci_epf_mutex); list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry) pci_ep_cfs_remove_epf_group(group); - list_del(&driver->epf_group); mutex_unlock(&pci_epf_mutex); }