From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 9 Sep 2014 22:56:53 +0000 (-0400)
Subject: Fix: syscall filtering: disable all syscalls
X-Git-Tag: v2.6.0-rc1~35
X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=72814741fb45c8f7d4c45cb2a4624e20b5a4a76a

Fix: syscall filtering: disable all syscalls

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 5023c2f9..c23f1d9e 100644
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -1033,6 +1033,12 @@ int lttng_syscall_filter_disable(struct lttng_channel *chan,
 		filter = chan->sc_filter;
 	}
 
+	if (!name) {
+		/* Disable all system calls */
+		bitmap_clear(filter->sc, 0, NR_syscalls);
+		bitmap_clear(filter->sc_compat, 0, NR_compat_syscalls);
+		goto apply_filter;
+	}
 	syscall_nr = get_syscall_nr(name);
 	compat_syscall_nr = get_compat_syscall_nr(name);
 	if (syscall_nr < 0 && compat_syscall_nr < 0) {
@@ -1053,6 +1059,7 @@ int lttng_syscall_filter_disable(struct lttng_channel *chan,
 		}
 		bitmap_clear(chan->sc_filter->sc_compat, compat_syscall_nr, 1);
 	}
+apply_filter:
 	if (!chan->sc_filter)
 		rcu_assign_pointer(chan->sc_filter, filter);
 	chan->syscall_all = 0;