CVE-2022-50215
scsi: sg: Allow waiting for commands to complete on removed device
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scsi: sg: Allow waiting for commands to complete on removed device
In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Allow waiting for commands to complete on removed device When a SCSI device is removed while in active use, currently sg will immediately return -ENODEV on any attempt to wait for active commands that were sent before the removal. This is problematic for commands that use SG_FLAG_DIRECT_IO since the data buffer may still be in use by the kernel when userspace frees or reuses it after getting ENODEV, leading to corrupted userspace memory (in the case of READ-type commands) or corrupted data being sent to the device (in the case of WRITE-type commands). This has been seen in practice when logging out of a iscsi_tcp session, where the iSCSI driver may still be processing commands after the device has been marked for removal. Change the policy to allow userspace to wait for active sg commands even when the device is being removed. Return -ENODEV only when there are no more responses to read.
Reserved 2025-06-18 | Published 2025-06-18 | Updated 2025-06-18 | Assigner Linuxgit.kernel.org/...c/bbc118acf7baf9e93c5e1314d14f481301af4d0f
git.kernel.org/...c/f5e61d9b4a699dd16f32d5f39eb1cf98d84c92ed
git.kernel.org/...c/ed9afd967cbfe7da2dc0d5e52c62a778dfe9f16b
git.kernel.org/...c/f135c65085eed869d10e4e7923ce1015288618da
git.kernel.org/...c/408bfa1489a3cfe7150b81ab0b0df99b23dd5411
git.kernel.org/...c/8c004b7dbb340c1e5889f5fb9e5baa6f6e5303e8
git.kernel.org/...c/35e60ec39e862159cb92923eefd5230d4a873cb9
git.kernel.org/...c/03d8241112d5e3cccce1a01274a221099f07d2e1
git.kernel.org/...c/3455607fd7be10b449f5135c00dc306b85dc0d21
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