From: covertusername967@gmail.com
To: covertusername976@gmail.com, 9front@9front.org
Subject: kernel: postnote patch
Date: Sat, 4 Apr 2020 23:48:26 -0500 [thread overview]
Message-ID: <06E1942FE9510AF49AD5A0548E38DB3F@gmail.com> (raw)
Currently, if you do a zero-sized write into the /proc/$pid/note file,
it will post the empty note successfully and cause the process to exit
with no status code. This patch disables zero-sized note strings
altogether.
diff -r f3cc6939a481 sys/src/9/port/proc.c
--- a/sys/src/9/port/proc.c Wed Apr 01 22:57:15 2020 +1030
+++ b/sys/src/9/port/proc.c Sat Apr 04 23:31:39 2020 -0500
@@ -903,6 +903,9 @@
return 0;
}
+ if(strlen(n) == 0)
+ return 0;
+
if(n != nil && flag != NUser && (p->notify == nil || p->notified))
p->nnote = 0;
next reply other threads:[~2020-04-05 4:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-05 4:48 covertusername967 [this message]
2020-04-06 14:07 covertusername967
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