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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2014-02-04 18:52:05 +0100
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2014-02-04 18:52:05 +0100
commit9a54b8d78e9d63987379206a0cbc856c46a2ef44 (patch)
tree55f8cb2aa713dfa37343be90e4c80f1a509a1ea7
parent03df518586e3cfd106eb20827781f12a0596e48c (diff)
Fix potential NULL dereference
Found by Coverity. * i386/i386at/com.c (comopen): On com_reprobe() returning success, check for `isai' again.
-rw-r--r--i386/i386at/com.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/i386/i386at/com.c b/i386/i386at/com.c
index 8f293af..e1ba71a 100644
--- a/i386/i386at/com.c
+++ b/i386/i386at/com.c
@@ -338,6 +338,8 @@ io_return_t comopen(
*/
if (!com_reprobe(unit))
return D_NO_SUCH_DEVICE;
+ if ((isai = cominfo[unit]) == 0 || isai->alive == 0)
+ return D_NO_SUCH_DEVICE;
}
tp = &com_tty[unit];