tree 1ae73e591d84d8e7df1aef47b777c582f8ae6870
parent afef866a44cd65fef292c174cad445b3fb526400
author Luca Milanesio <luca.milanesio@gmail.com> 1552255420 +0000
committer Matthias Sohn <matthias.sohn@sap.com> 1552399565 +0100

Check for packfile validity and fd before reading

When reading from a packfile, make sure that is valid
and has a non-null file-descriptor.

Because of concurrency between a thread invalidating a packfile
and another trying to read it, the read() may result into a NPE
that won't be able to be automatically recovered.

Throwing a PackInvalidException would instead cause the packlist
to be refreshed and the read to eventually succeed.

Bug: 544199
Change-Id: I27788b3db759d93ec3212de35c0094ecaafc2434
Signed-off-by: Luca Milanesio <luca.milanesio@gmail.com>