Revision 5d9b70f7d52eb14bb37861c663bae44de9521c35 authored by Mathias Nyman on 08 December 2017, 16:10:05 UTC, committed by Greg Kroah-Hartman on 08 December 2017, 17:26:34 UTC
Avoid null pointer dereference if some function is walking through the devs array accessing members of a new virt_dev that is mid allocation. Add the virt_dev to xhci->devs[i] _after_ the virt_device and all its members are properly allocated. issue found by KASAN: null-ptr-deref in xhci_find_slot_id_by_port "Quick analysis suggests that xhci_alloc_virt_device() is not mutex protected. If so, there is a time frame where xhci->devs[slot_id] is set but not fully initialized. Specifically, xhci->devs[i]->udev can be NULL." Cc: stable <stable@vger.kernel.org> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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| File | Mode | Size |
|---|---|---|
| Design | ||
| 00-INDEX | -rw-r--r-- | 935 bytes |
| NMI-RCU.txt | -rw-r--r-- | 4.2 KB |
| RTFP.txt | -rw-r--r-- | 82.8 KB |
| UP.txt | -rw-r--r-- | 5.6 KB |
| arrayRCU.txt | -rw-r--r-- | 5.1 KB |
| checklist.txt | -rw-r--r-- | 22.7 KB |
| listRCU.txt | -rw-r--r-- | 10.7 KB |
| lockdep-splat.txt | -rw-r--r-- | 4.8 KB |
| lockdep.txt | -rw-r--r-- | 4.4 KB |
| rcu.txt | -rw-r--r-- | 3.7 KB |
| rcu_dereference.txt | -rw-r--r-- | 12.0 KB |
| rcubarrier.txt | -rw-r--r-- | 12.8 KB |
| rculist_nulls.txt | -rw-r--r-- | 5.1 KB |
| rcuref.txt | -rw-r--r-- | 4.2 KB |
| stallwarn.txt | -rw-r--r-- | 15.1 KB |
| torture.txt | -rw-r--r-- | 13.4 KB |
| whatisRCU.txt | -rw-r--r-- | 38.8 KB |
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