* [RESEND PATCH v2] ext4: Annotate struct fname with __counted_by()
@ 2024-11-12 18:22 Thorsten Blum
0 siblings, 0 replies; only message in thread
From: Thorsten Blum @ 2024-11-12 18:22 UTC (permalink / raw)
To: Theodore Ts'o, Andreas Dilger, Kees Cook, Gustavo A. R. Silva
Cc: Thorsten Blum, Jan Kara, linux-ext4, linux-kernel,
linux-hardening
Add the __counted_by compiler attribute to the flexible array member
name to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
Changes in v2:
- Split the patch into two separate patches as suggested by Greg KH
- Link to v1: https://lore.kernel.org/r/20241104234214.8094-2-thorsten.blum@linux.dev/
---
fs/ext4/dir.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index ef6a3c8f3a9a..233479647f1b 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -418,7 +418,7 @@ struct fname {
__u32 inode;
__u8 name_len;
__u8 file_type;
- char name[];
+ char name[] __counted_by(name_len);
};
/*
--
2.47.0
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