From: Edward Adam Davis eadavis@qq.com

mainline inclusion from mainline-v6.12-rc1 commit 625fa77151f00c1bd00d34d60d6f2e710b3f9aad category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAVU7U CVE: CVE-2024-47671

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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The syzbot reported a kernel-usb-infoleak in usbtmc_write, we need to clear the structure before filling fields.

Fixes: 4ddc645f40e9 ("usb: usbtmc: Add ioctl for vendor specific write") Reported-and-tested-by: syzbot+9d34f80f841e948c3fdb@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=9d34f80f841e948c3fdb Signed-off-by: Edward Adam Davis eadavis@qq.com Cc: stable stable@kernel.org Link: https://lore.kernel.org/r/tencent_9649AA6EC56EDECCA8A7D106C792D1C66B06@qq.co... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/class/usbtmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index 311007b1d904..c2e666e82857 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -754,7 +754,7 @@ static struct urb *usbtmc_create_urb(void) if (!urb) return NULL;

- dmabuf = kmalloc(bufsize, GFP_KERNEL); + dmabuf = kzalloc(bufsize, GFP_KERNEL); if (!dmabuf) { usb_free_urb(urb); return NULL;