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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=m4qlh5ad; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB963606B2C9; Wed, 4 Nov 2026 19:22:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=m4qlh5ad Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A39E1F000C1; Wed, 4 Nov 2026 19:22:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793820139; bh=frXlYovGKxKiSN/Oj3/IY9GUET6etUhHzbC1M94LuG8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=m4qlh5adzIihmnlMCPV3MfzvM9clEODdoNPI2uMqY4fs5tXjOCWDUSzu6mv2JPcnd rIPr1zKO2U3CjW3V1MIfmNbgfh1n07E+bfpMs8tk02/3DnE87bHvJw3d0jbyRKMVJD IyG1TCJ8IDfIKO9zXzTPhcHA+ABY+MPRa3JEdRoY9H5TpyzNGzOxFD39D4e/nEzri/ xV3khedTdJnJfO/uoKUxMN3c9AMOVj129ZcQ4wKqGT6ApGnU+0jvS+ZI/4rijimnGb 2/KGqEkHg6aA14vgzVafdv5HLYM59RkWvexV7pVOwnU2YNnoy7SUAi1RAXlTmBHVKt aZyeLWcmGYS+Q== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever Subject: [PATCH RESEND v2 25/51] wifi: libipw: don't return 0 from writes to debug_level Date: Wed, 4 Nov 2026 20:22:05 +0100 Message-ID: <20261104-work-procfs-bugfixes-v2-25-021c84d852e0@kernel.org> In-Reply-To: <20261104-work-procfs-bugfixes-v2-0-021c84d852e0@kernel.org> References: <20261104-work-procfs-bugfixes-v2-0-021c84d852e0@kernel.org> X-Mailing-List: netdev@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1059; i=brauner@kernel.org; h=from:subject:message-id; bh=PSZyn/5j7f+UAGnOkF9zGJ8rErtLF7uTzeHltQyv5ig=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS9bny1/eaz260dbT8unLZwrN5tXTy3yfvErX9TPsXMM V8nc4f3WkcpC4MYF4OsmCKLQ7tJuNxynorNRpkaMHNYmUCGMHBxCsBEjHoY/iffUCphqBDzD6jS 3KKZ9/nt+Yxbx7kDk6dL8t/4/j9YjZmR4beq8vlDlkeLZQ/dKD+x8ZzFnrPzDR5/5vD+ZfFD7WF 3CS8A X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit debug_level_proc_write() returns the length of the string it parsed. A write that starts with a NUL byte thus returns 0 and writers that use stdio retry it forever. Return the number of bytes that were written instead, which also stops writes longer than the 11 bytes it looks at from coming up short. Fixes: b453872c35cf ("[NET] ieee80211 subsystem") Signed-off-by: Christian Brauner (Amutable) --- drivers/net/wireless/intel/ipw2x00/libipw_module.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/ipw2x00/libipw_module.c b/drivers/net/wireless/intel/ipw2x00/libipw_module.c index 22358b2c2ecd..552c8ff3928b 100644 --- a/drivers/net/wireless/intel/ipw2x00/libipw_module.c +++ b/drivers/net/wireless/intel/ipw2x00/libipw_module.c @@ -236,7 +236,7 @@ static ssize_t debug_level_proc_write(struct file *file, else libipw_debug_level = val; - return strnlen(buf, len); + return count; } static const struct proc_ops debug_level_proc_ops = { -- 2.53.0