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authorSebastian Huber <sebastian.huber@embedded-brains.de>2020-03-10 17:07:19 +0100
committerSebastian Huber <sebastian.huber@embedded-brains.de>2020-03-13 09:57:04 +0100
commitc2287ba2cff59a50848151833404bce0e3cf0a70 (patch)
tree24fbd290baf4722b2dd56df731f44b41b6765c45 /c/src
parent2ff83634668c56598c9505809bb016c8697ed24e (diff)
downloadrtems-c2287ba2cff59a50848151833404bce0e3cf0a70.tar.bz2
libio: Robust file descriptor reference counting
There was a race conditon in the reference counting of file descriptors during a close() operation. After the call to the close handler, the rtems_libio_free() function cleared the flags to zero. However, at this point in time there may still exist some holders of the file descriptor. With RTEMS_DEBUG enabled this could lead to failed assertions in rtems_libio_iop_drop(). Change the code to use only atomic read-modify-write operations on the rtems_libio_iop::flags.
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