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| author | alc <alc@FreeBSD.org> | 2006-07-17 06:45:03 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2006-07-17 06:45:03 +0000 |
| commit | 50001bf11957ef9bb1be28e28f803df45bae9028 (patch) | |
| tree | 534cdf1add6d7ddbe22439ff48e1c200c8cda080 /lib/libdevinfo/devinfo.c | |
| parent | b92d5e9b3309e7e8e90821b27f84a671c7c48002 (diff) | |
| download | FreeBSD-src-50001bf11957ef9bb1be28e28f803df45bae9028.zip FreeBSD-src-50001bf11957ef9bb1be28e28f803df45bae9028.tar.gz | |
Ensure that vm_object_deallocate() doesn't dereference a stale object
pointer: When vm_object_deallocate() sleeps because of a non-zero
paging in progress count on either object or object's shadow,
vm_object_deallocate() must ensure that object is still the shadow's
backing object when it reawakens. In fact, object may have been
deallocated while vm_object_deallocate() slept. If so, reacquiring
the lock on object can lead to a deadlock.
Submitted by: ups@
MFC after: 3 weeks
Diffstat (limited to 'lib/libdevinfo/devinfo.c')
0 files changed, 0 insertions, 0 deletions
