From: Johan Hovold <johan@kernel.org> stable inclusion from stable-v5.10.259 commit 180996f0ca774001944e4afa452d569ba2f6455c category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16255 CVE: CVE-2026-63928 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 60df93d30f9bdd27db17c4d80ed80ef718d7226b upstream. Make sure that the bulk-out buffers are at least as large as the hardcoded transfer size to avoid user-controlled slab corruption should a malicious device report a smaller endpoint max packet size than expected. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> --- drivers/usb/serial/omninet.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c index e51c9464ea42..dc6140070b99 100644 --- a/drivers/usb/serial/omninet.c +++ b/drivers/usb/serial/omninet.c @@ -29,6 +29,10 @@ /* This one seems to be a re-branded ZyXEL device */ #define BT_IGNITIONPRO_ID 0x2000 +#define OMNINET_HEADERLEN 4 +#define OMNINET_BULKOUTSIZE 64 +#define OMNINET_PAYLOADSIZE (OMNINET_BULKOUTSIZE - OMNINET_HEADERLEN) + /* function prototypes */ static void omninet_process_read_urb(struct urb *urb); static int omninet_prepare_write_buffer(struct usb_serial_port *port, @@ -53,6 +57,7 @@ static struct usb_serial_driver zyxel_omninet_device = { .description = "ZyXEL - omni.net lcd plus usb", .id_table = id_table, .num_bulk_out = 2, + .bulk_out_size = OMNINET_BULKOUTSIZE, .calc_num_ports = omninet_calc_num_ports, .port_probe = omninet_port_probe, .port_remove = omninet_port_remove, @@ -131,10 +136,6 @@ static int omninet_port_remove(struct usb_serial_port *port) return 0; } -#define OMNINET_HEADERLEN 4 -#define OMNINET_BULKOUTSIZE 64 -#define OMNINET_PAYLOADSIZE (OMNINET_BULKOUTSIZE - OMNINET_HEADERLEN) - static void omninet_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; -- 2.34.1