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CVE-2022-28390: can: ems_usb: ems_usb_start_xmit(): fix double dev_kfree_skb() in err… · torvalds/linux@c702227

ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c in the Linux kernel through 5.17.1 has a double free.

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can: ems_usb: ems_usb_start_xmit(): fix double dev_kfree_skb() in err…

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There is no need to call dev_kfree_skb() when usb_submit_urb() fails beacause can_put_echo_skb() deletes the original skb and can_free_echo_skb() deletes the cloned skb.

Link: https://lore.kernel.org/all/[email protected] Fixes: 702171a (“ems_usb: Added support for EMS CPC-USB/ARM7 CAN/USB interface”) Cc: [email protected] Cc: Sebastian Haas [email protected] Signed-off-by: Hangyu Hua [email protected] Signed-off-by: Marc Kleine-Budde [email protected]

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