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author | Corinna Vinschen <corinna@vinschen.de> | 2023-12-05 22:08:01 +0100 |
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committer | Corinna Vinschen <corinna@vinschen.de> | 2023-12-05 22:19:05 +0100 |
commit | 295bef07d6bd18cd58746e46b400faadfb54b712 (patch) | |
tree | 83904dce62b9457b266eedc2c5ca084b51aa7689 | |
parent | 14d786873c7db25d37b74d8c47ad8f3cbbe1883b (diff) | |
download | newlib-295bef07d6bd18cd58746e46b400faadfb54b712.zip newlib-295bef07d6bd18cd58746e46b400faadfb54b712.tar.gz newlib-295bef07d6bd18cd58746e46b400faadfb54b712.tar.bz2 |
Cygwin: posix_fallocate(3): fix offset and length sanity check
- len must not be <= 0
- offset + len must not exceed off_t (max. file size)
Fixes: 7636b5859062 ("* autoload.cc (NtSetInformationFile): Define.")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
-rw-r--r-- | winsup/cygwin/syscalls.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index b73391d..3edb55b 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -3030,8 +3030,10 @@ extern "C" int posix_fallocate (int fd, off_t offset, off_t len) { int res = 0; - if (offset < 0 || len == 0) + if (offset < 0 || len <= 0) res = EINVAL; + else if (INT64_MAX - len < offset) + res = EFBIG; else { cygheap_fdget cfd (fd); |