diff options
| author | Jane Smith <thebugfixers@pm.me> | 2026-07-21 19:45:25 +0000 |
|---|---|---|
| committer | Bojan Novković <bnovkov@FreeBSD.org> | 2026-07-21 19:50:11 +0000 |
| commit | 9724f3f8974957d2cd15f6b796c347ca50250954 (patch) | |
| tree | cae7987776009b8a13a4484bea490f2b14af67fa | |
| parent | ba583f0c2d63f03c834047e48a69095a86a71589 (diff) | |
cat: Fix a NULL pointer dereference
Check the `fdopen` return value before calling `cook_cat`.
Reviewed by: markj, bnovkov
Differential Revision: https://reviews.freebsd.org/D57741
MFC after: 1 week
| -rw-r--r-- | bin/cat/cat.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/bin/cat/cat.c b/bin/cat/cat.c index c4c04fb3fff6..8c10faf7cff9 100644 --- a/bin/cat/cat.c +++ b/bin/cat/cat.c @@ -259,7 +259,8 @@ scanfiles(char *argv[], int cooked __unused) if (fd == STDIN_FILENO) cook_cat(stdin); else { - fp = fdopen(fd, "r"); + if ((fp = fdopen(fd, "r")) == NULL) + err(1, "fdopen"); cook_cat(fp); fclose(fp); } |