diff options
Diffstat (limited to 'util/nvmutil/nvmutil.c')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index a6790f86..160981ad 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -267,6 +267,10 @@ static const char *mac_str; static const char *fname; static const char *argv0; +#ifndef SSIZE_MAX +#define SSIZE_MAX ((ssize_t)((size_t)-1 >> 1)) +#endif + /* * Use these for .invert in command[]: * If set to 1: read/write inverter (p0->p1, p1->p0) @@ -1327,6 +1331,10 @@ rw_file_exact(int fd, uint8_t *mem, size_t len, err(EIO, "%s: %s: Bad fd %d", path, rw_type_str, fd); if (!len) err(EIO, "%s: %s: Zero length", path, rw_type_str); + if (len > (size_t)SSIZE_MAX) + err(EIO, + "%s: %s: Requested length (%zu) exceeds SSIZE_MAX (%zd)", + path, rw_type_str, len, SSIZE_MAX); for (rc = 0; rc != (ssize_t)len; rc += rval) { if (rw_type == PSCHREIB) |