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charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261104-work-procfs-bugfixes-v2-11-bbf7d5546809@kernel.org> References: <20261104-work-procfs-bugfixes-v2-0-bbf7d5546809@kernel.org> In-Reply-To: <20261104-work-procfs-bugfixes-v2-0-bbf7d5546809@kernel.org> 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 X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1161; i=brauner@kernel.org; h=from:subject:message-id; bh=5p0zMz40BbKdivFQo1NNbyIz4tkvEi3yC5tXL4aXaeU=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS9zmaz+l255/dcMbeVTrFanCknSsvkc1YVB3m43Lw5N drx0iaxjlIWBjEuBlkxRRaHdpNwueU8FZuNMjVg5rAygQxh4OIUgIkI32BkeHvU6KWe6gWDSokM AXPh+UdezXsoZMqyb+L5Puufyec6zBkZ1nYtn1J1+eNm5X8arkoP+O5vXXg4NDqzfr7dM//7HjX /+QA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 led_proc_write() looks at the first eight bytes of a write and returns that many, so a writer that loops until everything is written, stdio does, sends the rest as a second command. That one is unknown and switches the LED off. Return the whole count, the rest is ignored. Fixes: ee1858d3122d ("[SPARC]: Add sun4m LED driver.") Signed-off-by: Christian Brauner (Amutable) --- arch/sparc/kernel/led.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/sparc/kernel/led.c b/arch/sparc/kernel/led.c index 9b53ac1fe533..a1478de9fe5d 100644 --- a/arch/sparc/kernel/led.c +++ b/arch/sparc/kernel/led.c @@ -68,6 +68,7 @@ static int led_proc_open(struct inode *inode, struct file *file) static ssize_t led_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { + size_t len = count; char *buf = NULL; if (count > LED_MAX_LENGTH) @@ -102,7 +103,7 @@ static ssize_t led_proc_write(struct file *file, const char __user *buffer, kfree(buf); - return count; + return len; } static const struct proc_ops led_proc_ops = { -- 2.53.0