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5da13ab8b0dcaa984c45ae43edf5a4d148603d42
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Masami Hiramatsu 5da13ab8b0 perf/core: Fix perf_kprobe_init() 
Fix error handling in perf_kprobe_init():

	==================================================================
	BUG: KASAN: slab-out-of-bounds in strlen+0x8e/0xa0 lib/string.c:482
	Read of size 1 at addr ffff88003f9cc5c0 by task syz-executor2/23095

	CPU: 0 PID: 23095 Comm: syz-executor2 Not tainted 4.16.0+ #24
	Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
	Call Trace:
	 __dump_stack lib/dump_stack.c:77 [inline]
	 dump_stack+0xca/0x13e lib/dump_stack.c:113
	 print_address_description+0x6e/0x2c0 mm/kasan/report.c:256
	 kasan_report_error mm/kasan/report.c:354 [inline]
	 kasan_report+0x256/0x380 mm/kasan/report.c:412
	 strlen+0x8e/0xa0 lib/string.c:482
	 kstrdup+0x21/0x70 mm/util.c:55
	 alloc_trace_kprobe+0xc8/0x930 kernel/trace/trace_kprobe.c:325
	 create_local_trace_kprobe+0x4f/0x3a0 kernel/trace/trace_kprobe.c:1438
	 perf_kprobe_init+0x149/0x1f0 kernel/trace/trace_event_perf.c:264
	 perf_kprobe_event_init+0xa8/0x120 kernel/events/core.c:8407
	 perf_try_init_event+0xcb/0x2a0 kernel/events/core.c:9719
	 perf_init_event kernel/events/core.c:9750 [inline]
	 perf_event_alloc+0x1367/0x1e20 kernel/events/core.c:10022
	 SYSC_perf_event_open+0x242/0x2330 kernel/events/core.c:10477
	 do_syscall_64+0x198/0x640 arch/x86/entry/common.c:287
	 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Reported-by: 范龙飞 <long7573@126.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: e12f03d703 ("perf/core: Implement the 'perf_kprobe' PMU")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-04-10 07:33:10 +02:00
..
blktrace.c
blktrace: fix trace mutex deadlock
2017-11-27 12:03:58 -07:00
bpf_trace.c
trace/bpf: remove helper bpf_perf_prog_read_value from tracepoint type programs
2018-03-20 23:08:52 +01:00
ftrace.c
ftrace: Remove incorrect setting of glob search field
2018-02-08 10:11:11 -05:00
Kconfig
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-01-17 00:10:42 -05:00
Makefile
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00
power-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ring_buffer_benchmark.c
ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU
2017-08-02 14:23:02 -04:00
ring_buffer.c
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
rpm-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_benchmark.c
trace: Eliminate cond_resched_rcu_qs() in favor of cond_resched()
2017-12-04 10:28:58 -08:00
trace_benchmark.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_branch.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_clock.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>
2017-03-02 08:42:27 +01:00
trace_entries.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_event_perf.c
perf/core: Fix perf_kprobe_init()
2018-04-10 07:33:10 +02:00
trace_events_filter_test.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_events_filter.c
tracing: Fix parsing of globs with a wildcard at the beginning
2018-02-08 10:11:47 -05:00
trace_events_hist.c
tracing: Reimplement log2
2017-10-04 13:10:39 -04:00
trace_events_trigger.c
tracing: Update stack trace skipping for ORC unwinder
2018-01-23 15:57:00 -05:00
trace_events.c
tracing: Make sure the parsed string always terminates with '\0'
2018-01-23 15:57:28 -05:00
trace_export.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_functions_graph.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_functions.c
tracing: Update stack trace skipping for ORC unwinder
2018-01-23 15:57:00 -05:00
trace_hwlat.c
trace: make trace_hwlat timestamp y2038 safe
2017-05-08 17:15:15 -07:00
trace_irqsoff.c
tracing: Add support for preempt and irq enable/disable events
2017-10-10 18:58:43 -04:00
trace_kdb.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_kprobe.c
Merge branch 'perf/urgent' into perf/core
2018-03-29 16:03:48 +02:00
trace_mmiotrace.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_nop.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_output.c
sched/debug: Rename task-state printing helpers
2017-10-10 11:43:29 +02:00
trace_output.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_printk.c
…
trace_probe.c
tracing: probeevent: Fix to support minus offset from symbol
2018-03-23 12:02:37 -04:00
trace_probe.h
Merge branch 'perf/urgent' into perf/core
2018-03-29 16:03:48 +02:00
trace_sched_switch.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_sched_wakeup.c
Merge branch 'linus' into sched/core, to pick up fixes
2017-11-08 10:17:15 +01:00
trace_selftest_dynamic.c
ftrace: Mark function tracer test functions noinline/noclone
2018-01-23 15:57:29 -05:00
trace_selftest.c
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00
trace_seq.c
…
trace_stack.c
tracing: Have stack trace not record if RCU is not watching
2017-12-14 20:48:22 -05:00
trace_stat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_stat.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_syscalls.c
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00
trace_uprobe.c
Merge branch 'perf/urgent' into perf/core, to pick up fixes
2018-02-17 11:39:28 +01:00
trace.c
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
trace.h
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00
tracing_map.c
tracing: Remove lookups from tracing_map hitcount
2017-10-04 13:05:42 -04:00
tracing_map.h
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00