[lttng-dev] [PATCH lttng-tools] Fix: Integer overflowed argument

[Mathieu Desnoyers]

Found by Coverity:

CID 1242317 (#1 of 2): Integer overflowed argument (INTEGER_OVERFLOW)25.
overflow_sink: Overflowed or truncated value (or a value computed from
an overflowed or truncated value) new_nbmem * 304UL used as critical
argument to function.

CID 1242317 (#2 of 2): Integer overflowed argument (INTEGER_OVERFLOW)27.
overflow_sink: Overflowed or truncated value (or a value computed from
an overflowed or truncated value) (new_nbmem - nbmem) * 304UL used as
critical argument to function.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
---
 src/bin/lttng-sessiond/syscall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bin/lttng-sessiond/syscall.c b/src/bin/lttng-sessiond/syscall.c
index 02fec15..cbc8cdf 100644
--- a/src/bin/lttng-sessiond/syscall.c
+++ b/src/bin/lttng-sessiond/syscall.c
@@ -82,7 +82,7 @@ int syscall_init_table(void)
 
 			/* Double memory size. */
 			new_nbmem = max(index, nbmem << 1);
-			if (new_nbmem < nbmem) {
+			if (new_nbmem > SIZE_MAX / sizeof(*new_list)) {
 				/* Overflow, stop everything, something went really wrong. */
 				ERR("Syscall listing memory size overflow. Stopping");
 				free(syscall_table);
-- 
2.1.4