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From cb78974394a9af865e1d2d606e838dbec0de80e8 Mon Sep 17 00:00:00 2001
From: Michael Jeanson <mjeanson@efficios.com>
Date: Mon, 5 Oct 2020 15:31:42 -0400
Subject: [PATCH 01/16] fix: strncpy equals destination size warning
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Some versions of GCC when called with -Wstringop-truncation will warn
when doing a copy of the same size as the destination buffer with
strncpy :
‘strncpy’ specified bound 256 equals destination size [-Werror=stringop-truncation]
Since we unconditionally write '\0' in the last byte, reduce the copy
size by one.
Upstream-Status: Backport
Change-Id: Idb907c9550817a06fc0dffc489740f63d440e7d4
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
---
lttng-syscalls.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 49c0d81b..b43dd570 100644
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -719,7 +719,7 @@ int fill_table(const struct trace_syscall_entry *table, size_t table_len,
ev.u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_COMPAT;
break;
}
- strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
+ strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN - 1);
ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
ev.instrumentation = LTTNG_KERNEL_SYSCALL;
chan_table[i] = _lttng_event_create(chan, &ev, filter,
--
2.25.1
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