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authorThorsten Blum <[email protected]>2024-08-08 17:00:24 +0200
committerChristian Brauner <[email protected]>2024-08-30 08:22:35 +0200
commit193b72792fdba54aa2af6c3ad72ce16c3f06b4f7 (patch)
tree76257d101ea7bd554673a26b5596c65bfcd03476
parent0f93bb54a3a502077bca4d7beb1fe2a90d3b59db (diff)
fs/select: Annotate struct poll_list with __counted_by()
Add the __counted_by compiler attribute to the flexible array member entries to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE. Signed-off-by: Thorsten Blum <[email protected]> Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Gustavo A. R. Silva <[email protected]> Signed-off-by: Christian Brauner <[email protected]>
-rw-r--r--fs/select.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/select.c b/fs/select.c
index 9515c3fa1a03..1a4849e2afb9 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -840,7 +840,7 @@ SYSCALL_DEFINE1(old_select, struct sel_arg_struct __user *, arg)
struct poll_list {
struct poll_list *next;
unsigned int len;
- struct pollfd entries[];
+ struct pollfd entries[] __counted_by(len);
};
#define POLLFD_PER_PAGE ((PAGE_SIZE-sizeof(struct poll_list)) / sizeof(struct pollfd))