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| author | Namjae Jeon <linkinjeon@kernel.org> | 2023-03-07 15:56:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-30 13:49:10 +0300 |
| commit | a4e6cd9253c8b6bf1f39c52cdb52355d28ad5ec9 (patch) | |
| tree | 96160543e911e8c706e32f66ee8c29310b92b177 /fs | |
| parent | bd344dc3bbf086f4c9175de3d1d0753e28ea7fdf (diff) | |
| download | linux-a4e6cd9253c8b6bf1f39c52cdb52355d28ad5ec9.tar.xz | |
ksmbd: add low bound validation to FSCTL_QUERY_ALLOCATED_RANGES
[ Upstream commit 342edb60dcda7a409430359b0cac2864bb9dfe44 ]
Smatch static checker warning:
fs/ksmbd/vfs.c:1040 ksmbd_vfs_fqar_lseek() warn: no lower bound on 'length'
fs/ksmbd/vfs.c:1041 ksmbd_vfs_fqar_lseek() warn: no lower bound on 'start'
Fix unexpected result that could caused from negative start and length.
Fixes: f44158485826 ("cifsd: add file operations")
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ksmbd/smb2pdu.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 3bb971831e7c..61d12eab0be1 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -7457,13 +7457,16 @@ static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, if (in_count == 0) return -EINVAL; + start = le64_to_cpu(qar_req->file_offset); + length = le64_to_cpu(qar_req->length); + + if (start < 0 || length < 0) + return -EINVAL; + fp = ksmbd_lookup_fd_fast(work, id); if (!fp) return -ENOENT; - start = le64_to_cpu(qar_req->file_offset); - length = le64_to_cpu(qar_req->length); - ret = ksmbd_vfs_fqar_lseek(fp, start, length, qar_rsp, in_count, out_count); if (ret && ret != -E2BIG) |