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d068144d3b
bpf_probe_read_kernel_str() will add a nul terminator to the dst, then we don't care about if the dst size is big enough. This patch also replaces the hard-coded 16 with TASK_COMM_LEN to make it grepable. Link: https://lkml.kernel.org/r/20211120112738.45980-6-laoar.shao@gmail.com Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: David Hildenbrand <david@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> Cc: Michal Miroslaw <mirq-linux@rere.qmqm.pl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: David Hildenbrand <david@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
37 lines
879 B
C
37 lines
879 B
C
/* Copyright (c) 2016 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include <linux/sched.h>
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#include <uapi/linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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/* from /sys/kernel/debug/tracing/events/task/task_rename/format */
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struct task_rename {
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__u64 pad;
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__u32 pid;
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char oldcomm[TASK_COMM_LEN];
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char newcomm[TASK_COMM_LEN];
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__u16 oom_score_adj;
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};
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SEC("tracepoint/task/task_rename")
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int prog(struct task_rename *ctx)
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{
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return 0;
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}
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/* from /sys/kernel/debug/tracing/events/random/urandom_read/format */
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struct urandom_read {
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__u64 pad;
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int got_bits;
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int pool_left;
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int input_left;
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};
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SEC("tracepoint/random/urandom_read")
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int prog2(struct urandom_read *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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