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-rw-r--r--src/sim.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/sim.c b/src/sim.c
index 1271dedb..49422e4f 100644
--- a/src/sim.c
+++ b/src/sim.c
@@ -792,7 +792,9 @@ static gboolean sim_op_check_cached(struct ofono_modem *modem)
buffer = g_malloc(file_length);
- if (TFR(read(fd, buffer, file_length)) < file_length)
+ len = TFR(read(fd, buffer, file_length));
+
+ if (len < (ssize_t)file_length)
goto cleanup;
for (record = 0; record < file_length / record_length; record++) {