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| author | Thorsten Blum <thorsten.blum@toblux.com> | 2024-08-28 23:42:55 +0200 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-09-21 01:31:03 +0200 |
| commit | 2869b3a00e202ee8d3d90ab7d88f4057c4bb3135 (patch) | |
| tree | 66a6019c086e5a03c8faee6fb80c043fc102bd9a /fs | |
| parent | nfsd: call cache_put if xdr_reserve_space returns NULL (diff) | |
| download | linux-2869b3a00e202ee8d3d90ab7d88f4057c4bb3135.tar.xz linux-2869b3a00e202ee8d3d90ab7d88f4057c4bb3135.zip | |
NFSD: Annotate struct pnfs_block_deviceaddr with __counted_by()
Add the __counted_by compiler attribute to the flexible array member
volumes to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Use struct_size() instead of manually calculating the number of bytes to
allocate for a pnfs_block_deviceaddr with a single volume.
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/blocklayout.c | 6 | ||||
| -rw-r--r-- | fs/nfsd/blocklayoutxdr.h | 2 |
2 files changed, 3 insertions, 5 deletions
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c index 3c040c81c77d..08a20e5bcf7f 100644 --- a/fs/nfsd/blocklayout.c +++ b/fs/nfsd/blocklayout.c @@ -147,8 +147,7 @@ nfsd4_block_get_device_info_simple(struct super_block *sb, struct pnfs_block_deviceaddr *dev; struct pnfs_block_volume *b; - dev = kzalloc(sizeof(struct pnfs_block_deviceaddr) + - sizeof(struct pnfs_block_volume), GFP_KERNEL); + dev = kzalloc(struct_size(dev, volumes, 1), GFP_KERNEL); if (!dev) return -ENOMEM; gdp->gd_device = dev; @@ -255,8 +254,7 @@ nfsd4_block_get_device_info_scsi(struct super_block *sb, const struct pr_ops *ops; int ret; - dev = kzalloc(sizeof(struct pnfs_block_deviceaddr) + - sizeof(struct pnfs_block_volume), GFP_KERNEL); + dev = kzalloc(struct_size(dev, volumes, 1), GFP_KERNEL); if (!dev) return -ENOMEM; gdp->gd_device = dev; diff --git a/fs/nfsd/blocklayoutxdr.h b/fs/nfsd/blocklayoutxdr.h index b0361e8aa9a7..4e28ac8f1127 100644 --- a/fs/nfsd/blocklayoutxdr.h +++ b/fs/nfsd/blocklayoutxdr.h @@ -47,7 +47,7 @@ struct pnfs_block_volume { struct pnfs_block_deviceaddr { u32 nr_volumes; - struct pnfs_block_volume volumes[]; + struct pnfs_block_volume volumes[] __counted_by(nr_volumes); }; __be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr, |