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-rw-r--r--util/nvmutil/nvmutil.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index 2d613f81..d05d25ce 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -1908,7 +1908,7 @@ rw_file_exact(int fd, u8 *mem, size_t nrw,
while (1) {
/* Prevent theoretical overflow */
- if ((size_t)rv > (nrw - rc))
+ if (rv >= 0 && (size_t)rv > (nrw - rc))
goto err_rw_file_exact;
rc += rv;