Add `__attribute__((__aligned__))` to the `user_p` to guarantee pointer returned by the `malloc()` is properly aligned for user. This attribute asks the compiler to align a type to the maximum useful alignment for the target machine we are compiling for, which is often, but by no means always, 8 or 16 bytes [1]. Link: https://gcc.gnu.org/onlinedocs/gcc-11.2.0/gcc/Common-Variable-Attributes.html#Common-Variable-Attributes [1] Fixes: https://github.com/axboe/liburing/issues/454 Reported-by: Louvian Lyndal <louvianlyndal@xxxxxxxxx> Signed-off-by: Ammar Faizi <ammar.faizi@xxxxxxxxxxxxxxxxxxxxx> --- src/nolibc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/nolibc.c b/src/nolibc.c index 5582ca0..251780b 100644 --- a/src/nolibc.c +++ b/src/nolibc.c @@ -20,7 +20,7 @@ void *memset(void *s, int c, size_t n) struct uring_heap { size_t len; - char user_p[]; + char user_p[] __attribute__((__aligned__)); }; void *malloc(size_t len) -- 2.30.2
