According to [0], some program sends NUL for padding purpose. We can discard them.
https://www.gnu.org/software/termutils/manual/termcap-1.3/html_mono/termcap.html#SEC7 Reported-by: Sarah Newman <s...@prgmr.com> Signed-off-by: Wei Liu <wei.l...@citrix.com> --- Cc: Sarah Newman <s...@prgmr.com> Cc: Jan Beulich <jbeul...@suse.com> Cc: Andrew Cooper <andrew.coop...@citrix.com> Cc: Ian Jackson <ian.jack...@eu.citrix.com> A bit RFC. Awaiting test results. --- xen/drivers/char/consoled.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/xen/drivers/char/consoled.c b/xen/drivers/char/consoled.c index 552abf5766..6fcb2aa115 100644 --- a/xen/drivers/char/consoled.c +++ b/xen/drivers/char/consoled.c @@ -72,7 +72,9 @@ size_t consoled_guest_rx(void) { char c = cons_ring->out[MASK_XENCONS_IDX(cons++, cons_ring->out)]; - buf[idx++] = c; + /* Discard NUL. See the "Padding" section of termcap manual. */ + if ( c != '\0' ) + buf[idx++] = c; recv++; if ( idx >= BUF_SZ ) -- 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
