diff options
| author | Florent Revest <revest@chromium.org> | 2025-11-14 12:05:46 +0100 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2025-11-14 11:43:32 +0000 |
| commit | e8b93029aa041e365d10718a98ee015f1d72fab6 (patch) | |
| tree | f035a44140205e53e4d779007193c8bf21bd872b | |
| parent | 07e030dea6e6d9ca88b75bb3be2810f47083b328 (diff) | |
executor: disallow O_CREAT in syz_open_dev
I can't think of a valid reason to create nodes under /dev/ if they
don't already exist.
On systems where /dev/ isn't backed by a virtual/temp file system,
O_CREAT lets syzkaller create persistent files on disk and may
unnecessarily clutter or fill the disk with files that have nothing to
do with the intended syscall descriptions.
| -rw-r--r-- | executor/common_linux.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/executor/common_linux.h b/executor/common_linux.h index 5d477a16a..7b35f284f 100644 --- a/executor/common_linux.h +++ b/executor/common_linux.h @@ -2422,7 +2422,7 @@ static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2) *hash = '0' + (char)(nb % 10); // 10 devices should be enough for everyone. nb /= 10; } - return open(buf, a2, 0); + return open(buf, a2 & ~O_CREAT, 0); } } #endif |