From bippy-d175d3acf727 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , Subject: CVE-2023-52785: scsi: ufs: core: Fix racing issue between ufshcd_mcq_abort() and ISR Description =========== In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Fix racing issue between ufshcd_mcq_abort() and ISR If command timeout happens and cq complete IRQ is raised at the same time, ufshcd_mcq_abort clears lprb->cmd and a NULL pointer deref happens in the ISR. Error log: ufshcd_abort: Device abort task at tag 18 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000108 pc : [0xffffffe27ef867ac] scsi_dma_unmap+0xc/0x44 lr : [0xffffffe27f1b898c] ufshcd_release_scsi_cmd+0x24/0x114 The Linux kernel CVE team has assigned CVE-2023-52785 to this issue. Affected and fixed versions =========================== Issue introduced in 6.5 with commit f1304d442077 and fixed in 6.5.13 with commit 8f15a7e3c054 Issue introduced in 6.5 with commit f1304d442077 and fixed in 6.6.3 with commit f84d461f33a6 Issue introduced in 6.5 with commit f1304d442077 and fixed in 6.7 with commit 27900d7119c4 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2023-52785 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/ufs/core/ufs-mcq.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/8f15a7e3c054d960bbd1521110700450bbf798a1 https://git.kernel.org/stable/c/f84d461f33a6b27304d468d9cfb56c0cefdb4ee7 https://git.kernel.org/stable/c/27900d7119c464b43cd9eac69c85884d17bae240