From 9062d50e75c24dc7911be05c9b1719b3b256af15 Mon Sep 17 00:00:00 2001 From: Liu Chao Date: Mon, 21 Sep 2026 15:25:51 +0800 Subject: usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd generic_set_cmd() and generic_get_cmd() use the low nibble of ctrl->bRequest as an index into con->data[]: u8 cmd = (ctrl->bRequest & 0x0F); /* 0 .. 15 */ ... con->data[cmd] = value; /* OOB when cmd >= 5 */ struct usb_audio_control (include/linux/usb/audio.h) declares data as a 5-element array, so indices 5 through 15 write (or read) up to 44 bytes past the end of the array on the heap. A malicious USB host can craft a class-specific SET_CUR / GET_CUR request with an arbitrary bRequest value, triggering the out-of-bounds access from an IRQ completion handler with no further preconditions. Add an ARRAY_SIZE() guard to both functions. Fixes: c47d7b09891a ("USB: audio: add USB audio class definitions") Cc: stable Reviewed-by: Weibin Liu Signed-off-by: Liu Chao Reviewed-by: Ivy Lopez Link: https://patch.msgid.link/20260921072551.3708191-1-liuc63@xiaopeng.com Signed-off-by: Greg Kroah-Hartman --- Documentation/input/input_kapi.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 Documentation/input/input_kapi.rst (limited to 'Documentation/input/input_kapi.rst') diff --git a/Documentation/input/input_kapi.rst b/Documentation/input/input_kapi.rst new file mode 100644 index 000000000..9937522da --- /dev/null +++ b/Documentation/input/input_kapi.rst @@ -0,0 +1,14 @@ +.. include:: + +################################ +Linux Input Subsystem kernel API +################################ + +.. toctree:: + :caption: Table of Contents + :maxdepth: 2 + :numbered: + + input-programming + gameport-programming + notifier -- cgit v1.3.1