Searched hist:c1c390ba (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/target/ |
| H A D | target_core_user.c | c1c390ba Tue Dec 19 04:03:54 CST 2017 Mike Christie <mchristi@redhat.com> tcmu: prevent corruption when invalid data page requested
We will always have a page mapped for cmd data if it is
valid command. If the mapping does not exist then something
bad happened in userspace and it should not proceed. This
has us return VM_FAULT_SIGBUS when this happens instead of
returning a freshly allocated paged. The latter can cause
corruption because userspace might write the pages data
overwriting valid data or return it to the initiator.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
c1c390ba Tue Dec 19 04:03:54 CST 2017 Mike Christie <mchristi@redhat.com> tcmu: prevent corruption when invalid data page requested
We will always have a page mapped for cmd data if it is
valid command. If the mapping does not exist then something
bad happened in userspace and it should not proceed. This
has us return VM_FAULT_SIGBUS when this happens instead of
returning a freshly allocated paged. The latter can cause
corruption because userspace might write the pages data
overwriting valid data or return it to the initiator.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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