WSL2-Linux-Kernel/drivers/infiniband
Faisal Latif c12e56ef69 RDMA/nes: Don't allow userspace QPs to use STag zero
STag zero is a special STag that allows consumers to access any bus
address without registering memory.  The nes driver unfortunately
allows STag zero to be used even with QPs created by unprivileged
userspace consumers, which means that any process with direct verbs
access to the nes device can read and write any memory accessible to
the underlying PCI device (usually any memory in the system).  Such
access is usually given for cluster software such as MPI to use, so
this is a local privilege escalation bug on most systems running this
driver.

The driver was using STag zero to receive the last streaming mode
data; to allow STag zero to be disabled for unprivileged QPs, the
driver now registers a special MR for this data.

Cc: <stable@kernel.org>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-12 16:21:41 -07:00
..
core infiniband: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:39 -08:00
hw RDMA/nes: Don't allow userspace QPs to use STag zero 2009-03-12 16:21:41 -07:00
ulp IPoIB: Do not print error messages for multicast join retries 2009-01-16 13:42:59 -08:00
Kconfig RDMA/addr: Fix build breakage when IPv6 is disabled 2008-12-29 23:37:14 -08:00
Makefile RDMA/nes: Add a driver for NetEffect RNICs 2008-02-04 20:20:45 -08:00