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Code Issues Releases Wiki Activity

bpf: Fix sparse warnings in kprobe_multi_resolve_syms 

Adding missing __user tags to fix sparse warnings:

kernel/trace/bpf_trace.c:2370:34: warning: incorrect type in argument 2 (different address spaces)
kernel/trace/bpf_trace.c:2370:34:    expected void const [noderef] __user *from
kernel/trace/bpf_trace.c:2370:34:    got void const *usyms
kernel/trace/bpf_trace.c:2376:51: warning: incorrect type in argument 2 (different address spaces)
kernel/trace/bpf_trace.c:2376:51:    expected char const [noderef] __user *src
kernel/trace/bpf_trace.c:2376:51:    got char const *
kernel/trace/bpf_trace.c:2443:49: warning: incorrect type in argument 1 (different address spaces)
kernel/trace/bpf_trace.c:2443:49:    expected void const *usyms
kernel/trace/bpf_trace.c:2443:49:    got void [noderef] __user *[assigned] usyms

Fixes: 0dcac27254 ("bpf: Add multi kprobe link")
Reported-by: Alexei Starovoitov <ast@kernel.org>
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220330110510.398558-1-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2022-03-30 13:05:10 +02:00 committed by Daniel Borkmann
parent 522574fd78
commit d31e0386a2
1 changed files with 2 additions and 2 deletions
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4
kernel/trace/bpf_trace.c
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@ -2349,11 +2349,11 @@ kprobe_multi_link_handler(struct fprobe *fp, unsigned long entry_ip,
}
static int
kprobe_multi_resolve_syms(const void *usyms, u32 cnt,
kprobe_multi_resolve_syms(const void __user *usyms, u32 cnt,
unsigned long *addrs)
{
unsigned long addr, size;
const char **syms;
const char __user **syms;
int err = -ENOMEM;
unsigned int i;
char *func;