[lttng-dev] [PATCH lttng-tools] Fix: Properly sanitize input parameter

[Yannick Lamarre]

The lttng client uses the sizeof the containing buffer for input string
sanitation instead of libc defined macro.

Signed-off-by: Yannick Lamarre <ylamarre at efficios.com>
---
lttng-enable_channel was improperly verifying user input and wrongly rejected
valid input.

 src/bin/lttng/commands/enable_channels.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bin/lttng/commands/enable_channels.c b/src/bin/lttng/commands/enable_channels.c
index b4e2942c..5e314d9b 100644
--- a/src/bin/lttng/commands/enable_channels.c
+++ b/src/bin/lttng/commands/enable_channels.c
@@ -244,7 +244,7 @@ static int enable_channel(char *session_name)
 		void *extended_ptr;
 
 		/* Validate channel name's length */
-		if (strlen(channel_name) >= NAME_MAX) {
+		if (strlen(channel_name) > sizeof(chan_opts.name) - 1) {
 			ERR("Channel name is too long (max. %zu characters)",
 					sizeof(chan_opts.name) - 1);
 			error = 1;
-- 
2.11.0