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| author | Eric W. Biederman <ebiederm@xmission.com> | 2022-03-08 13:04:19 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 13:59:04 +0200 |
| commit | 5c6baf808f409b69ad0799a551a704177b5a7ec1 (patch) | |
| tree | 2f4daf92ba99265c2e494f9011ba5cb8fff39002 /samples/connector | |
| parent | 6b73d7715a9899b0a54565a562db6bae39e4ff35 (diff) | |
| download | linux-rt-5c6baf808f409b69ad0799a551a704177b5a7ec1.tar.gz | |
coredump: Use the vma snapshot in fill_files_note
commit 390031c942116d4733310f0684beb8db19885fe6 upstream.
Matthew Wilcox reported that there is a missing mmap_lock in
file_files_note that could possibly lead to a user after free.
Solve this by using the existing vma snapshot for consistency
and to avoid the need to take the mmap_lock anywhere in the
coredump code except for dump_vma_snapshot.
Update the dump_vma_snapshot to capture vm_pgoff and vm_file
that are neeeded by fill_files_note.
Add free_vma_snapshot to free the captured values of vm_file.
Reported-by: Matthew Wilcox <willy@infradead.org>
Link: https://lkml.kernel.org/r/20220131153740.2396974-1-willy@infradead.org
Cc: stable@vger.kernel.org
Fixes: a07279c9a8cd ("binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot")
Fixes: 2aa362c49c31 ("coredump: extend core dump note section to contain file names of mapped files")
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'samples/connector')
0 files changed, 0 insertions, 0 deletions