Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-09 14:43:16 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ipv6: Annotate struct ip6_sf_socklist with __counted_by

Browse Source 
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 ip6_sf_socklist.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922172858.3822653-3-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:28:45 -07:00 committed by Jakub Kicinski
parent 210d4e9c73
commit 5d22b65280
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/if_inet6.h
View File

@ -89,7 +89,7 @@ struct ip6_sf_socklist {
unsigned int sl_max;
unsigned int sl_count;
struct rcu_head rcu;
struct in6_addr sl_addr[];
struct in6_addr sl_addr[] __counted_by(sl_max);
};
#define IP6_SFBLOCK 10 /* allocate this many at once */