diff options
| author | dzwdz | 2023-01-24 18:49:58 +0100 |
|---|---|---|
| committer | dzwdz | 2023-01-24 18:49:58 +0100 |
| commit | 52e7fe3c679469032e77a5ca4adf19618ba1201b (patch) | |
| tree | 1359c692e4f2e8ff172fdeb9d6643328f6e89a4c /src/kernel/vfs/procfs.c | |
| parent | ecf724116488651a0dba3880fb89aca308e2251b (diff) | |
kernel/procfs: prevent reading kernel memory
knew it
Diffstat (limited to 'src/kernel/vfs/procfs.c')
| -rw-r--r-- | src/kernel/vfs/procfs.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/kernel/vfs/procfs.c b/src/kernel/vfs/procfs.c index a417606..be907fd 100644 --- a/src/kernel/vfs/procfs.c +++ b/src/kernel/vfs/procfs.c @@ -123,6 +123,10 @@ procfs_accept(struct vfs_request *req) virt_cpy_to(req->caller->pages, req->output.buf, buf, pos); vfsreq_finish_short(req, pos); } else if (req->type == VFSOP_READ && h->type == PhMem) { + if (p->pages == NULL || req->caller->pages == NULL) { + vfsreq_finish_short(req, 0); + return; + } size_t res = virt_cpy( req->caller->pages, req->output.buf, p->pages, (__user void*)req->offset, |