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| author | Kees Cook <keescook@chromium.org> | 2023-09-15 13:14:39 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2023-10-02 09:48:53 -0700 |
| commit | 1c674013547d0b9131dce0acdda74c2a5b95510e (patch) | |
| tree | 55969746b6e126a280bc2499c50843ad6da18ed4 /fs/nfs | |
| parent | c0c64aac4916a2592bd174547b279a408368dd31 (diff) | |
| download | linux-1c674013547d0b9131dce0acdda74c2a5b95510e.tar.gz | |
NFS/flexfiles: Annotate struct nfs4_ff_layout_segment with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct nfs4_ff_layout_segment.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: linux-nfs@vger.kernel.org
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915201434.never.346-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayout.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.h b/fs/nfs/flexfilelayout/flexfilelayout.h index 354a031c69b17..f84b3fb0dddd8 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.h +++ b/fs/nfs/flexfilelayout/flexfilelayout.h @@ -99,7 +99,7 @@ struct nfs4_ff_layout_segment { u64 stripe_unit; u32 flags; u32 mirror_array_cnt; - struct nfs4_ff_layout_mirror *mirror_array[]; + struct nfs4_ff_layout_mirror *mirror_array[] __counted_by(mirror_array_cnt); }; struct nfs4_flexfile_layout { |