Alexei Starovoitov a7658e1a41 bpf: Check types of arguments passed into helpers ... Introduce new helper that reuses existing skb perf_event output implementation, but can be called from raw_tracepoint programs that receive 'struct sk_buff *' as tracepoint argument or can walk other kernel data structures to skb pointer. In order to do that teach verifier to resolve true C types of bpf helpers into in-kernel BTF ids. The type of kernel pointer passed by raw tracepoint into bpf program will be tracked by the verifier all the way until it's passed into helper function. For example: kfree_skb() kernel function calls trace_kfree_skb(skb, loc); bpf programs receives that skb pointer and may eventually pass it into bpf_skb_output() bpf helper which in-kernel is implemented via bpf_skb_event_output() kernel function. Its first argument in the kernel is 'struct sk_buff *'. The verifier makes sure that types match all the way. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20191016032505.2089704-11-ast@kernel.org		2019-10-17 16:44:36 +02:00
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Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2019-09-18 12:34:53 -07:00
Makefile	tracing: Add unified dynamic event framework	2018-12-08 20:54:09 -05:00
blktrace.c	blktrace: no need to check return value of debugfs_create functions	2019-06-03 15:39:39 +02:00
bpf_trace.c	bpf: Check types of arguments passed into helpers	2019-10-17 16:44:36 +02:00
fgraph.c	ftrace: Look up the address of return_to_handler() using helpers	2019-09-18 12:24:47 +10:00
ftrace.c	Tracing updates:	2019-09-20 11:19:48 -07:00
ftrace_internal.h	treewide: Rename rcu_dereference_raw_notrace() to _check()	2019-08-01 14:16:21 -07:00
power-traces.c	…
preemptirq_delay_test.c	tracing: Use trace_clock_local() for looping in preemptirq_delay_test.c	2018-10-17 15:35:33 -04:00
ring_buffer.c	ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS	2019-05-28 09:36:19 -04:00
ring_buffer_benchmark.c	tracing: Use CONFIG_PREEMPTION	2019-07-31 19:03:35 +02:00
rpm-traces.c	…
trace.c	Tracing updates:	2019-09-20 11:19:48 -07:00
trace.h	tracing: Fix clang -Wint-in-bool-context warnings in IF_ASSIGN macro	2019-09-28 17:13:39 -04:00
trace_benchmark.c	…
trace_benchmark.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_branch.c	x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP	2019-04-03 11:02:24 +02:00
trace_clock.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_dynevent.c	tracing/dynevent: Pass extra arguments to match operation	2019-08-31 12:19:38 -04:00
trace_dynevent.h	tracing/dynevent: Pass extra arguments to match operation	2019-08-31 12:19:38 -04:00
trace_entries.h	tracing: Change the function format to display function names by perf	2019-02-11 14:53:43 -05:00
trace_event_perf.c	tracing: Pass type into tracing_generic_entry_update()	2019-07-16 15:14:48 -04:00
trace_events.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-09-16 17:25:49 -07:00
trace_events_filter.c	tracing: Have error path in predicate_parse() free its allocated memory	2019-09-28 17:13:39 -04:00
trace_events_filter_test.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_events_hist.c	tracing: Make sure variable reference alias has correct var_ref_idx	2019-09-17 11:21:29 -04:00
trace_events_trigger.c	tracing: Add trace_array parameter to create_event_filter()	2019-04-08 09:22:28 -04:00
trace_export.c	tracing: Add trigger file for trace_markers tracefs/ftrace/print	2018-05-29 08:28:53 -04:00
trace_functions.c	…
trace_functions_graph.c	fgraph: Remove redundant ftrace_graph_notrace_addr() test	2019-07-30 21:50:03 -04:00
trace_hwlat.c	sched/core: Provide a pointer to the valid CPU mask	2019-06-03 11:49:37 +02:00
trace_irqsoff.c	The biggest change for this release is in the histogram code.	2019-03-11 17:01:32 -07:00
trace_kdb.c	tracing: Silence GCC 9 array bounds warning	2019-05-25 23:04:30 -04:00
trace_kprobe.c	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
trace_kprobe_selftest.c	selftest/ftrace: Move kprobe selftest function to separate compile unit	2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_mmiotrace.c	…
trace_nop.c	…
trace_output.c	tracing: Be more clever when dumping hex in __print_hex()	2019-09-17 11:21:28 -04:00
trace_output.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_preemptirq.c	kprobes: Prohibit probing on hardirq tracers	2019-02-13 08:16:40 +01:00
trace_printk.c	tracing: Trivia spelling fix containerof() -> container_of()	2018-09-26 12:21:00 +03:00
trace_probe.c	tracing/probe: Fix to check the difference of nr_args before adding probe	2019-09-28 17:07:53 -04:00
trace_probe.h	tracing/probe: Reject exactly same probe event	2019-09-19 11:09:16 -04:00
trace_probe_tmpl.h	tracing/probe: Support user-space dereference	2019-05-25 23:04:42 -04:00
trace_sched_switch.c	…
trace_sched_wakeup.c	sched/core: Convert get_task_struct() to return the task	2019-07-25 15:51:54 +02:00
trace_selftest.c	function_graph: Have selftest also emulate tr->reset() as it did with tr->init()	2019-04-21 19:46:56 -04:00
trace_selftest_dynamic.c	…
trace_seq.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_stack.c	tracing: Document the stack trace algorithm in the comments	2019-08-31 12:19:40 -04:00
trace_stat.c	…
trace_stat.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_syscalls.c	syscalls: Remove start and number from syscall_get_arguments() args	2019-04-05 09:26:43 -04:00
trace_uprobe.c	tracing/probe: Fix same probe event argument matching	2019-09-25 06:34:06 -04:00
tracing_map.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
tracing_map.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00