diff options
| author | Pali Rohár <pali@kernel.org> | 2024-09-21 01:29:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-22 12:54:21 -0700 |
| commit | b2bccc729b933a9f0f982ee05f7cf0c59a32311b (patch) | |
| tree | be064b8881e11787ec952a92e3fa1638534c2caf /fs | |
| parent | 061ea46c56f6d62f1a216cdeaf44e6cecb9f6de4 (diff) | |
| download | linux-b2bccc729b933a9f0f982ee05f7cf0c59a32311b.tar.gz linux-b2bccc729b933a9f0f982ee05f7cf0c59a32311b.tar.bz2 linux-b2bccc729b933a9f0f982ee05f7cf0c59a32311b.zip | |
cifs: Validate content of WSL reparse point buffers
[ Upstream commit 1f48660667efb97c3cf70485c7e1977af718b48b ]
WSL socket, fifo, char and block devices have empty reparse buffer.
Validate the length of the reparse buffer.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Stable-dep-of: cad3fc0a4c8c ("cifs: Throw -EOPNOTSUPP error on unsupported reparse point type from parse_reparse_point()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/smb/client/reparse.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/smb/client/reparse.c b/fs/smb/client/reparse.c index e56a8df23fec..bd8808e50d12 100644 --- a/fs/smb/client/reparse.c +++ b/fs/smb/client/reparse.c @@ -651,6 +651,11 @@ int parse_reparse_point(struct reparse_data_buffer *buf, case IO_REPARSE_TAG_LX_FIFO: case IO_REPARSE_TAG_LX_CHR: case IO_REPARSE_TAG_LX_BLK: + if (le16_to_cpu(buf->ReparseDataLength) != 0) { + cifs_dbg(VFS, "srv returned malformed buffer for reparse point: 0x%08x\n", + le32_to_cpu(buf->ReparseTag)); + return -EIO; + } break; default: cifs_tcon_dbg(VFS | ONCE, "unhandled reparse tag: 0x%08x\n", |