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bpf: also show process name/pid in bpf_jit_dump 

It can be useful for testing to see the actual process/pid who is loading
a given filter. I was running some BPF test program and noticed unusual
filter loads from time to time, triggered by some other application in the
background. bpf_jit_disasm is still working after this change.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2015-07-30 12:42:49 +02:00 committed by David S. Miller
parent 485d6511e7
commit b13138ef72
1 changed files with 4 additions and 2 deletions
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6
include/linux/filter.h
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@ -12,6 +12,7 @@
#include <linux/linkage.h>
#include <linux/printk.h>
#include <linux/workqueue.h>
#include <linux/sched.h>
#include <asm/cacheflush.h>
@ -438,8 +439,9 @@ void bpf_jit_free(struct bpf_prog *fp);
static inline void bpf_jit_dump(unsigned int flen, unsigned int proglen,
u32 pass, void *image)
{
pr_err("flen=%u proglen=%u pass=%u image=%pK\n",
flen, proglen, pass, image);
pr_err("flen=%u proglen=%u pass=%u image=%pK from=%s pid=%d\n", flen,
proglen, pass, image, current->comm, task_pid_nr(current));
if (image)
print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_OFFSET,
16, 1, image, proglen, false);