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.

https://git.kernel.org/stable/c/03d8241112d5e3cccce1a01274a221099f07d2e1

https://git.kernel.org/stable/c/3455607fd7be10b449f5135c00dc306b85dc0d21

https://git.kernel.org/stable/c/35e60ec39e862159cb92923eefd5230d4a873cb9

https://git.kernel.org/stable/c/408bfa1489a3cfe7150b81ab0b0df99b23dd5411

https://git.kernel.org/stable/c/8c004b7dbb340c1e5889f5fb9e5baa6f6e5303e8

https://git.kernel.org/stable/c/bbc118acf7baf9e93c5e1314d14f481301af4d0f

https://git.kernel.org/stable/c/ed9afd967cbfe7da2dc0d5e52c62a778dfe9f16b

https://git.kernel.org/stable/c/f135c65085eed869d10e4e7923ce1015288618da

https://git.kernel.org/stable/c/f5e61d9b4a699dd16f32d5f39eb1cf98d84c92ed