From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Fri, 21 Jul 2017 18:15:24 +0000 (+0200)
Subject: pathtrace: limit amount of checked poll fds similarly to select limit
X-Git-Tag: v4.19~119
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=456c95cdc2f390c231fc6a5cac6069a0e34030f6;p=strace

pathtrace: limit amount of checked poll fds similarly to select limit

* pathtrace.c (pathtrace_match_set): Limit the maximum descriptor number
checked for fd match in poll family syscalls to 1024 * 1024.
---

diff --git a/pathtrace.c b/pathtrace.c
index 4585e26d..b0dd8f99 100644
--- a/pathtrace.c
+++ b/pathtrace.c
@@ -323,6 +323,8 @@ pathtrace_match_set(struct tcb *tcp, struct path_set *set)
 		start = tcp->u_arg[0];
 		nfds = tcp->u_arg[1];
 
+		if (nfds > 1024 * 1024)
+			nfds = 1024 * 1024;
 		end = start + sizeof(fds) * nfds;
 
 		if (nfds == 0 || end < start)