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Tue, 14 Sep 2021 05:38:15 -0700 (PDT) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Kumar Kartikeya Dwivedi , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , Jesper Dangaard Brouer , =?utf-8?q?Toke_H=C3=B8iland-J?= =?utf-8?b?w7hyZ2Vuc2Vu?= , netdev@vger.kernel.org Subject: [PATCH bpf-next v2 06/10] bpf: Bump MAX_BPF_STACK size to 768 bytes Date: Tue, 14 Sep 2021 18:07:45 +0530 Message-Id: <20210914123750.460750-7-memxor@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210914123750.460750-1-memxor@gmail.com> References: <20210914123750.460750-1-memxor@gmail.com> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=912; h=from:subject; bh=B19ILwR6K3rnkHTsjQYwJPYCeDgJJfCXMOYYCnC9Rck=; b=owEBbQKS/ZANAwAIAUzgyIZIvxHKAcsmYgBhQJdW3LKRLbzT7lxBhQPvK4fFFNC2ILXCx90krbkD YYg+LBWJAjMEAAEIAB0WIQRLvip+Buz51YI8YRFM4MiGSL8RygUCYUCXVgAKCRBM4MiGSL8RymO/D/ 96CbCCvvSNET6IxUjrLbI/OHXI2yo5UeZ9puFOxSgPOyhxx005s/C8bVWtAEllZvdh/htmO7rc+7uq oGEOGHG9DU0XhjcgaMIvbKwQHQ/PDX9DXcigUGbDqND6Ysf98qRMwVKExMaF9GQ795L2nG0JMoGv0j zRjdrl/iB+dh/Bp6eOmBDlgpNb+JyqHRjQqhp5HbCeMr2DKR+yMvxwVlXbWz3sUKlTqXHnwisMqXes Bn16rdhSA9CzBKEAcj1efIy/6S7tqBAW/55lFw4WP4ZLvgH7QtpIBNRQvdFOkHfL7YDXsbQXA1YiZT rNEm6ftxqkjZKEB39U6mAauKLQo0S7Wmmm1JqwBUlr7J7WjfLipxFu/rpbBzsKeqhQ+EPn2Tvxr4cK KvqJC69uVy3+bKQqjcB99oCPsdXZOU0/QINqjODE6qVJv0z5TrsNWcYBlWoDp6OUPNEUMznhsjQRcR Dnti5q2dRrKu1nNzErCgDG0a1cb4MGeCdYJFzumLGXLRiT6MZQaC8OoDPl8hLZeLSZ8Nd8YLA2si+y 878myrCUx7l73qoEXI0uDoQHJaC1UIGDLB6qyEZF4XTZF6PhUH8NorzbydEV0h2OJ4+Zxm4Mid26GG 9Hdmumq5x5u5eb87OZ8n9VV4Qexd2U7aMb+2CC08LiMON2YHxkp7YDYsxk7g== X-Developer-Key: i=memxor@gmail.com; a=openpgp; fpr=4BBE2A7E06ECF9D5823C61114CE0C88648BF11CA Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Increase the maximum stack size accessible to BPF program to 768 bytes. This is done so that gen_loader can use 94 additional fds for kfunc BTFs that it passes in to fd_array from the remaining space available for the loader_stack struct to expand. Signed-off-by: Kumar Kartikeya Dwivedi --- include/linux/filter.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/filter.h b/include/linux/filter.h index 4a93c12543ee..b214189ece62 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -82,8 +82,8 @@ struct ctl_table_header; */ #define BPF_SYM_ELF_TYPE 't' -/* BPF program can access up to 512 bytes of stack space. */ -#define MAX_BPF_STACK 512 +/* BPF program can access up to 768 bytes of stack space. */ +#define MAX_BPF_STACK 768 /* Helper macros for filter block array initializers. */