diff options
Diffstat (limited to 'source3/modules')
| -rw-r--r-- | source3/modules/vfs_default.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/source3/modules/vfs_default.c b/source3/modules/vfs_default.c index 6c1946a99d..aa207056b3 100644 --- a/source3/modules/vfs_default.c +++ b/source3/modules/vfs_default.c @@ -1423,12 +1423,32 @@ static int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_stru static int vfswrap_aio_read(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb) { - return sys_aio_read(aiocb); + int ret; + /* + * aio_read must be done as root, because in the glibc aio + * implementation the helper thread needs to be able to send a signal + * to the main thread, even when it has done a seteuid() to a + * different user. + */ + become_root(); + ret = sys_aio_read(aiocb); + unbecome_root(); + return ret; } static int vfswrap_aio_write(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb) { - return sys_aio_write(aiocb); + int ret; + /* + * aio_write must be done as root, because in the glibc aio + * implementation the helper thread needs to be able to send a signal + * to the main thread, even when it has done a seteuid() to a + * different user. + */ + become_root(); + ret = sys_aio_write(aiocb); + unbecome_root(); + return ret; } static ssize_t vfswrap_aio_return(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb) |