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Message-ID: <20210930095932.03434a3b@canb.auug.org.au>
Date: Thu, 30 Sep 2021 09:59:32 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc: Kees Cook <keescook@...omium.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the kspp-gustavo tree
Hi all,
After merging the kspp-gustavo tree, today's linux-next build (x86_64
allmodconfig) failed like this:
In file included from include/linux/bpf_verifier.h:9,
from kernel/bpf/verifier.c:12:
kernel/bpf/verifier.c: In function 'jit_subprogs':
include/linux/filter.h:366:4: error: cast between incompatible function types from 'unsigned int (*)(const void *, const struct bpf_insn *)' to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12472:16: note: in expansion of macro 'BPF_CAST_CALL'
12472 | insn->imm = BPF_CAST_CALL(func[subprog]->bpf_func) -
| ^~~~~~~~~~~~~
kernel/bpf/verifier.c: In function 'do_misc_fixups':
include/linux/filter.h:366:4: error: cast between incompatible function types from 'void * (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12953:17: note: in expansion of macro 'BPF_CAST_CALL'
12953 | insn->imm = BPF_CAST_CALL(ops->map_lookup_elem) -
| ^~~~~~~~~~~~~
include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *, void *, u64)' {aka 'int (* const)(struct bpf_map *, void *, void *, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12957:17: note: in expansion of macro 'BPF_CAST_CALL'
12957 | insn->imm = BPF_CAST_CALL(ops->map_update_elem) -
| ^~~~~~~~~~~~~
include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12961:17: note: in expansion of macro 'BPF_CAST_CALL'
12961 | insn->imm = BPF_CAST_CALL(ops->map_delete_elem) -
| ^~~~~~~~~~~~~
include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *, u64)' {aka 'int (* const)(struct bpf_map *, void *, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12965:17: note: in expansion of macro 'BPF_CAST_CALL'
12965 | insn->imm = BPF_CAST_CALL(ops->map_push_elem) -
| ^~~~~~~~~~~~~
include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12969:17: note: in expansion of macro 'BPF_CAST_CALL'
12969 | insn->imm = BPF_CAST_CALL(ops->map_pop_elem) -
| ^~~~~~~~~~~~~
include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12973:17: note: in expansion of macro 'BPF_CAST_CALL'
12973 | insn->imm = BPF_CAST_CALL(ops->map_peek_elem) -
| ^~~~~~~~~~~~~
include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, u32, u64)' {aka 'int (* const)(struct bpf_map *, unsigned int, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
| ^
kernel/bpf/verifier.c:12977:17: note: in expansion of macro 'BPF_CAST_CALL'
12977 | insn->imm = BPF_CAST_CALL(ops->map_redirect) -
| ^~~~~~~~~~~~~
cc1: all warnings being treated as errors
Caused by commit
ffea83dd8823 ("Makefile: Enable -Wcast-function-type")
I have reverted that commit for today.
--
Cheers,
Stephen Rothwell
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