f48a920504
Martin KaFai Lau says: ==================== This set addresses issue about accessing invalid ptr returned from bpf_tcp_sock() and bpf_sk_fullsock() after bpf_sk_release(). v4: - Tried the one "id" approach. It does not work well and the reason is in the Patch 1 commit message. - Rename refcount_id to ref_obj_id. - With ref_obj_id, resetting reg->id to 0 is fine in mark_ptr_or_null_reg() because ref_obj_id is passed to release_reference() instead of reg->id. - Also reset reg->ref_obj_id in mark_ptr_or_null_reg() when is_null == true - sk_to_full_sk() is removed from bpf_sk_fullsock() and bpf_tcp_sock(). - bpf_get_listener_sock() is added to do sk_to_full_sk() in Patch 2. - If tp is from bpf_tcp_sock(sk) and sk is a refcounted ptr, bpf_sk_release(tp) is also allowed. v3: - reset reg->refcount_id for the is_null case in mark_ptr_or_null_reg() v2: - Remove refcount_id arg from release_reference() because id == refcount_id - Add a WARN_ON_ONCE to mark_ptr_or_null_regs() to catch an internal verifier bug. ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.