Description
In the Linux kernel, the following vulnerability has been resolved: usb: uas: fix urb unmapping issue when the uas device is remove during ongoing data transfer When a UAS device is unplugged during data transfer, there is a probability of a system panic occurring. The root cause is an access to an invalid memory address during URB callback handling. Specifically, this happens when the dma_direct_unmap_sg() function is called within the usb_hcd_unmap_urb_for_dma() interface, but the sg->dma_address field is 0 and the sg data structure has already been freed. The SCSI driver sends transfer commands by invoking uas_queuecommand_lck() in uas.c, using the uas_submit_urbs() function to submit requests to USB. Within the uas_submit_urbs() implementation, three URBs (sense_urb, data_urb, and cmd_urb) are sequentially submitted. Device removal may occur at any point during uas_submit_urbs execution, which may result in URB submission failure. However, some URBs might have been successfully submitted before the failure, and uas_submit_urbs will return the -ENODEV error code in this case. The current error handling directly calls scsi_done(). In the SCSI driver, this eventually triggers scsi_complete() to invoke scsi_end_request() for releasing the sgtable. The successfully submitted URBs, when being unlinked to giveback, call usb_hcd_unmap_urb_for_dma() in hcd.c, leading to exceptions during sg unmapping operations since the sg data structure has already been freed. This patch modifies the error condition check in the uas_submit_urbs() function. When a UAS device is removed but one or more URBs have already been successfully submitted to USB, it avoids immediately invoking scsi_done() and save the cmnd to devinfo->cmnd array. If the successfully submitted URBs is completed before devinfo->resetting being set, then the scsi_done() function will be called within uas_try_complete() after all pending URB operations are finalized. Otherwise, the scsi_done() function will be called within uas_zap_pending(), which is executed after usb_kill_anchored_urbs(). The error handling only takes effect when uas_queuecommand_lck() calls uas_submit_urbs() and returns the error value -ENODEV . In this case, the device is disconnected, and the flow proceeds to uas_disconnect(), where uas_zap_pending() is invoked to call uas_try_complete().
Product status
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before 6289fc489e94c9beb6be2b502ccc263663733d72
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before 66ac05e7b0d6bbd1bee9fcf729e20fd4cce86d17
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before 75f8e2643085db4f7e136fc6b368eb114dd80a64
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before e3a55221f4de080cb7a91ba10f01c4f708603f8d
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before 2b90a8131c83f6f2be69397d2b7d14d217d95d2f
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before 426edbfc88b22601ea34a441a469092e7b301c52
eb2a86ae8c544be0ab04aa8169390c0669bc7148 (git) before 26d56a9fcb2014b99e654127960aa0a48a391e3c
5.10
Any version before 5.10
5.10.247 (semver)
5.15.197 (semver)
6.1.159 (semver)
6.6.119 (semver)
6.12.61 (semver)
6.17.11 (semver)
6.18 (original_commit_for_fix)
References
git.kernel.org/...c/6289fc489e94c9beb6be2b502ccc263663733d72
git.kernel.org/...c/66ac05e7b0d6bbd1bee9fcf729e20fd4cce86d17
git.kernel.org/...c/75f8e2643085db4f7e136fc6b368eb114dd80a64
git.kernel.org/...c/e3a55221f4de080cb7a91ba10f01c4f708603f8d
git.kernel.org/...c/2b90a8131c83f6f2be69397d2b7d14d217d95d2f
git.kernel.org/...c/426edbfc88b22601ea34a441a469092e7b301c52
git.kernel.org/...c/26d56a9fcb2014b99e654127960aa0a48a391e3c
Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.
