kernel/linux.git/drivers/usb/class, branch v6.18.22

cdc-acm: new quirk for EPSON HMD

2026-04-11T12:26:44+00:00

commit f97e96c303d689708f7f713d8f3afcc31f1237e9 upstream. This device has a union descriptor that is just garbage and needs a custom descriptor. In principle this could be done with a (conditionally activated) heuristic. That would match more devices without a need for defining a new quirk. However, this always carries the risk that the heuristics does the wrong thing and leads to more breakage. Defining the quirk and telling it exactly what to do is the safe and conservative approach. Signed-off-by: Oliver Neukum Cc: stable Link: https://patch.msgid.link/20260317084139.1461008-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman

usb: usbtmc: Flush anchored URBs in usbtmc_release

2026-04-11T12:26:42+00:00

commit 8a768552f7a8276fb9e01d49773d2094ace7c8f1 upstream. When calling usbtmc_release, pending anchored URBs must be flushed or killed to prevent use-after-free errors (e.g. in the HCD giveback path). Call usbtmc_draw_down() to allow anchored URBs to be completed. Fixes: 4f3c8d6eddc2 ("usb: usbtmc: Support Read Status Byte with SRQ per file") Reported-by: syzbot+9a3c54f52bd1edbd975f@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=9a3c54f52bd1edbd975f Cc: stable Signed-off-by: Heitor Alves de Siqueira Link: https://patch.msgid.link/20260312-usbtmc-flush-release-v1-1-5755e9f4336f@igalia.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman

usb: class: cdc-wdm: fix reordering issue in read code path

2026-03-19T15:08:27+00:00

commit 8df672bfe3ec2268c2636584202755898e547173 upstream. Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1]. Fix it by using WRITE_ONCE and memory barriers. Fixes: afba937e540c9 ("USB: CDC WDM driver") Cc: stable Signed-off-by: Oliver Neukum Closes: https://lore.kernel.org/linux-usb/CALbr=LbrUZn_cfp7CfR-7Z5wDTHF96qeuM=3fO2m-q4cDrnC4A@mail.gmail.com/ Reported-by: Gui-Dong Han Reviewed-by: Gui-Dong Han Link: https://patch.msgid.link/20260304130116.1721682-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman

USB: usbtmc: Use usb_bulk_msg_killable() with user-specified timeouts

2026-03-19T15:08:26+00:00

commit 7784caa413a89487dd14dd5c41db8753483b2acb upstream. The usbtmc driver accepts timeout values specified by the user in an ioctl command, and uses these timeouts for some usb_bulk_msg() calls. Since the user can specify arbitrarily long timeouts and usb_bulk_msg() uses unkillable waits, call usb_bulk_msg_killable() instead to avoid the possibility of the user hanging a kernel thread indefinitely. Reported-by: syzbot+25ba18e2c5040447585d@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-usb/8e1c7ac5-e076-44b0-84b8-1b34b20f0ae1@suse.com/T/#t Tested-by: syzbot+25ba18e2c5040447585d@syzkaller.appspotmail.com Signed-off-by: Alan Stern Fixes: 048c6d88a021 ("usb: usbtmc: Add ioctls to set/get usb timeout") CC: stable@vger.kernel.org Link: https://patch.msgid.link/81c6fc24-0607-40f1-8c20-5270dab2fad5@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman

usb: cdc-acm: Restore CAP_BRK functionnality to CH343

2026-03-19T15:08:26+00:00

commit 14ae24cba291bddfdc296bbcbfd00cd09d0498ef upstream. The CH343 USB/serial adapter is as buggy as it is popular (very). One of its quirks is that despite being capable of signalling a BREAK condition, it doesn't advertise it. This used to work nonetheless until 66aad7d8d3ec5 ("usb: cdc-acm: return correct error code on unsupported break") applied some reasonable restrictions, preventing breaks from being emitted on devices that do not advertise CAP_BRK. Add a quirk for this particular device, so that breaks can still be produced on some of my machines attached to my console server. Fixes: 66aad7d8d3ec5 ("usb: cdc-acm: return correct error code on unsupported break") Signed-off-by: Marc Zyngier Cc: stable Cc: Oliver Neukum Cc: Greg Kroah-Hartman Acked-by: Oliver Neukum Link: https://patch.msgid.link/20260301124440.1192752-1-maz@kernel.org Signed-off-by: Greg Kroah-Hartman

usb: usblp: Use min_t() to improve usblp_read()

2025-09-06T13:20:22+00:00

Use min_t() to improve usblp_read() and avoid calculating 'avail - usblp->readcount' twice. Use min_t(ssize_t,,) instead of min() to avoid a signedness error. Signed-off-by: Thorsten Blum Link: https://lore.kernel.org/r/20250829173713.56222-1-thorsten.blum@linux.dev Signed-off-by: Greg Kroah-Hartman

Merge tag 'usb-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

2025-07-29T17:17:10+00:00

Pull USB / Thunderbolt updates from Greg KH: "Here is the big set of USB and Thunderbolt driver changes for 6.17-rc1. Lots of little things in here, mostly all small cleanups and updates, no major new features this development cycle. Stuff included in here is: - xhci minor tweaks for error handling - typec minor updates and a driver update - gadget driver api cleanups - unused function removals - unbind memory leak fixes - a few new device ids added - a few new devices supported for some drivers - other minor cleanups and changes All of these have been in linux-next with no reported issues, with the leak fixes being in the shortest amount of time, but they are 'obviously correct' :)" * tag 'usb-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (100 commits) usb: musb: omap2430: clean up probe error handling usb: musb: omap2430: fix device leak at unbind usb: gadget: udc: renesas_usb3: fix device leak at unbind usb: dwc3: meson-g12a: fix device leaks at unbind usb: dwc3: imx8mp: fix device leak at unbind usb: musb: omap2430: enable compile testing usb: gadget: udc: renesas_usb3: drop unused module alias usb: xhci: print xhci->xhc_state when queue_command failed usb: atm: cxacru: Merge cxacru_upload_firmware() into cxacru_heavy_init() USB: serial: option: add Foxconn T99W709 usb: core: add urb->sgt parameter description thunderbolt: Fix copy+paste error in match_service_id() usb: typec: ucsi: Update power_supply on power role change usb: typec: ucsi: psy: Set current max to 100mA for BC 1.2 and Default usb: typec: fusb302: cache PD RX state usb: typec: ucsi: yoga-c630: add DRM dependency usb: gadget : fix use-after-free in composite_dev_cleanup() usb: chipidea: imx: Add a missing blank line usb: gadget: f_uac1: replace scnprintf() with sysfs_emit() usb: usblp: clean up assignment inside if conditions ...

usb: usblp: clean up assignment inside if conditions

2025-07-21T14:30:54+00:00

This patch cleans up a few cases where assignments were made inside of if conditions, like if ((rv = func()) < 0) into two lines, to improve readability and be more in-line with Linux kernel coding style. It also cleans up checkpatch warnings like: ERROR: do not use assignment in if condition No functional change, just a style and maintainability fix. Signed-off-by: Darshan Rathod Link: https://lore.kernel.org/r/20250718091045.264129-1-darshan.rathod@siqol.com Signed-off-by: Greg Kroah-Hartman

cdc-acm: fix race between initial clearing halt and open

2025-07-21T14:29:44+00:00

On the devices that need their endpoints to get an initial clear_halt, this needs to be done before the devices can be opened. That means it needs to be before the devices are registered. Fixes: 15bf722e6f6c0 ("cdc-acm: Add support of ATOL FPrint fiscal printers") Cc: stable Signed-off-by: Oliver Neukum Link: https://lore.kernel.org/r/20250717141259.2345605-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman

tty: introduce and use tty_port_tty_vhangup() helper

2025-06-17T11:42:33+00:00

This code (tty_get -> vhangup -> tty_put) is repeated on few places. Introduce a helper similar to tty_port_tty_hangup() (asynchronous) to handle even vhangup (synchronous). And use it on those places. In fact, reuse the tty_port_tty_hangup()'s code and call tty_vhangup() depending on a new bool parameter. Signed-off-by: "Jiri Slaby (SUSE)" Cc: Karsten Keil Cc: David Lin Cc: Johan Hovold Cc: Alex Elder Cc: Oliver Neukum Cc: Marcel Holtmann Cc: Johan Hedberg Cc: Luiz Augusto von Dentz Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20250611100319.186924-2-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman