Module Name: src
Committed By: chs
Date: Mon Aug 5 17:36:42 UTC 2019
Modified Files:
src/sys/uvm: uvm_fault.c
Log Message:
fix two bugs reported in
https://syzkaller.appspot.com/bug?id=8840dce484094a926e1ec388ffb83acb2fa291c9
- in uvm_fault_check(), if the map entry is wired, handle the fault the same
way
that we would handle UVM_FAULT_WIRE. faulting on wired mappings is valid
if the mapped object was truncated and then later grown again.
- in uvm_fault_unwire_locked(), we must hold the locks for the vm_map_entry
while calling pmap_extract() in order to avoid races with the mapped object
being truncated while we are unwiring it.
Reported-by: syzbot+2e0ae2fc35ab7301c...@syzkaller.appspotmail.com
To generate a diff of this commit:
cvs rdiff -u -r1.206 -r1.207 src/sys/uvm/uvm_fault.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
