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termios: Fix infinite loop in receive path

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In canonical mode, the raw input buffer or the canonical buffer may
overflow without an end of line.  Avoid an infinite loop in this case.

Update #2915.
This commit is contained in:
Sebastian Huber
2017-02-24 10:29:05 +01:00
parent 0e8d205559
commit a27128c5dc
1 changed files with 9 additions and 5 deletions
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14
cpukit/libcsupport/src/termios.c
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@@ -1521,13 +1521,17 @@ fillBufferQueue (struct rtems_termios_tty *tty)
/*
* Wait for characters
*/
if ( wait ) {
rtems_status_code sc;
if (wait) {
if (tty->ccount < CBUFSIZE - 1) {
rtems_status_code sc;
sc = rtems_semaphore_obtain(
tty->rawInBuf.Semaphore, tty->rawInBufSemaphoreOptions, timeout);
if (sc != RTEMS_SUCCESSFUL)
sc = rtems_semaphore_obtain(
tty->rawInBuf.Semaphore, tty->rawInBufSemaphoreOptions, timeout);
if (sc != RTEMS_SUCCESSFUL)
break;
} else {
break;
}
}
}
}