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bpf: fix u64_stats_init() usage in bpf_prog_alloc() 

We need to iterate through all possible cpus.

Fixes: 492ecee892 ("bpf: enable program stats")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Eric Dumazet 2019-03-01 14:33:11 -08:00 committed by Daniel Borkmann
parent 3860d38f28
commit 4b9113045b
1 changed files with 7 additions and 1 deletions
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8
kernel/bpf/core.c
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@ -109,6 +109,7 @@ struct bpf_prog *bpf_prog_alloc(unsigned int size, gfp_t gfp_extra_flags)
{
gfp_t gfp_flags = GFP_KERNEL | __GFP_ZERO | gfp_extra_flags;
struct bpf_prog *prog;
int cpu;
prog = bpf_prog_alloc_no_stats(size, gfp_extra_flags);
if (!prog)
@ -121,7 +122,12 @@ struct bpf_prog *bpf_prog_alloc(unsigned int size, gfp_t gfp_extra_flags)
return NULL;
}
u64_stats_init(&prog->aux->stats->syncp);
for_each_possible_cpu(cpu) {
struct bpf_prog_stats *pstats;
pstats = per_cpu_ptr(prog->aux->stats, cpu);
u64_stats_init(&pstats->syncp);
}
return prog;
}
EXPORT_SYMBOL_GPL(bpf_prog_alloc);