From: Pavel Begunkov Date: Tue, 13 May 2025 17:26:46 +0000 (+0100) Subject: io_uring/kbuf: account ring io_buffer_list memory X-Git-Tag: v6.12.35~401 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c58b577cf7576e1079d0b358db61832cbeb0dfca;p=thirdparty%2Fkernel%2Fstable.git io_uring/kbuf: account ring io_buffer_list memory commit 475a8d30371604a6363da8e304a608a5959afc40 upstream. Follow the non-ringed pbuf struct io_buffer_list allocations and account it against the memcg. There is low chance of that being an actual problem as ring provided buffer should either pin user memory or allocate it, which is already accounted. Cc: stable@vger.kernel.org # 6.1 Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/3985218b50d341273cafff7234e1a7e6d0db9808.1747150490.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c index 7a8c3a004800e..94602d1f7e6ff 100644 --- a/io_uring/kbuf.c +++ b/io_uring/kbuf.c @@ -728,7 +728,7 @@ int io_register_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg) io_destroy_bl(ctx, bl); } - free_bl = bl = kzalloc(sizeof(*bl), GFP_KERNEL); + free_bl = bl = kzalloc(sizeof(*bl), GFP_KERNEL_ACCOUNT); if (!bl) return -ENOMEM;