kernerl make fail when enable CONFIG_BPF_SYSCALL=y/CONFIG_NET_ACT_BPF=y
- Dominant language
- C
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Description
OS: CentOS7.6 4.14.0-115.el7a.0.1.aarch64
issue:
when I enable CONFIG_BPF_SYSCALL=y/CONFIG_NET_ACT_BPF=y through make menuconfig,
and kernel make fails:
CC arch/arm64/kernel/crash_dump.o
CC [M] fs/cifs/smb2file.o
CC [M] fs/cifs/xattr.o
CC [M] fs/cifs/cifsacl.o
CC kernel/bpf/tnum.o
CC mm/list_lru.o
CC mm/workingset.o
kernel/bpf/verifier.c: In function ‘check_call’:
kernel/bpf/verifier.c:1679:4: error: passing argument 1 of ‘verbose’ from incompatible pointer type [-Werror]
verbose(env, "verifier bug\n");
^
kernel/bpf/verifier.c:168:28: note: expected ‘const char *’ but argument is of type ‘struct bpf_verifier_env *’
static __printf(1, 2) void verbose(const char *fmt, ...)
^
CC mm/debug.o
kernel/bpf/verifier.c: In function ‘fixup_bpf_calls’:
kernel/bpf/verifier.c:4233:5: error: passing argument 1 of ‘verbose’ from incompatible pointer type [-Werror]
verbose(env, "tail_call obusing map_ptr\n");
^
kernel/bpf/verifier.c:168:28: note: expected ‘const char *’ but argument is of type ‘struct bpf_verifier_env *’
static __printf(1, 2) void verbose(const char *fmt, ...)
^
CC mm/gup.o
cc1: all warnings being treated as errors
make[2]: *** [kernel/bpf/verifier.o] Error 1
make[2]: *** Waiting for unfinished jobs....
anybody knows why?
Contributor guide
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Research direction
Start with kernel/bpf/verifier.c and the CONFIG_BPF_SYSCALL and CONFIG_NET_ACT_BPF settings described in the report. Reproduce the failure through make menuconfig and the kernel build, then trace the reported verbose() calls and compiler diagnostics. Done means the kernel builds successfully with both options enabled, with the relevant compiler errors addressed.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, linux
- Domain
- build-system, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100