Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Chen Zhongjin ac58b88ccb ftrace: Fix invalid address access in lookup_rec() when index is 0 ... commit ee92fa443358f4fc0017c1d0d325c27b37802504 upstream. KASAN reported follow problem: BUG: KASAN: use-after-free in lookup_rec Read of size 8 at addr ffff000199270ff0 by task modprobe CPU: 2 Comm: modprobe Call trace: kasan_report __asan_load8 lookup_rec ftrace_location arch_check_ftrace_location check_kprobe_address_safe register_kprobe When checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a pg which is newly added to ftrace_pages_start in ftrace_process_locs(). Before the first pg->index++, index is 0 and accessing pg->records[-1].ip will cause this problem. Don't check the ip when pg->index is 0. Link: https://lore.kernel.org/linux-trace-kernel/20230309080230.36064-1-chenzhongjin@huawei.com Cc: stable@vger.kernel.org Fixes: 9644302e33 ("ftrace: Speed up search by skipping pages by address") Suggested-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-03-22 13:28:09 +01:00
..
blktrace.c	blktrace: Fix output non-blktrace event when blk_classic option enabled	2023-01-18 11:41:13 +01:00
bpf_trace.c	bpf: Skip task with pid=1 in send_signal_common()	2023-02-06 07:52:48 +01:00
fgraph.c
ftrace.c	ftrace: Fix invalid address access in lookup_rec() when index is 0	2023-03-22 13:28:09 +01:00
ftrace_internal.h
Kconfig
Makefile
power-traces.c
preemptirq_delay_test.c
ring_buffer.c	tracing: Add NULL checks for buffer in ring_buffer_free_read_page()	2023-03-11 16:44:13 +01:00
ring_buffer_benchmark.c
rpm-traces.c
trace.c	tracing: Fix poll() and select() do not work on per_cpu trace_pipe and trace_pipe_raw	2023-02-22 12:50:30 +01:00
trace.h	tracing: Make sure trace_printk() can output as soon as it can be used	2023-02-06 07:52:43 +01:00
trace_benchmark.c
trace_benchmark.h
trace_branch.c
trace_clock.c
trace_dynevent.c	tracing: Free buffers when a used dynamic event is removed	2022-12-08 11:23:04 +01:00
trace_dynevent.h
trace_entries.h
trace_event_perf.c
trace_events.c	tracing: Free buffers when a used dynamic event is removed	2022-12-08 11:23:04 +01:00
trace_events_filter.c
trace_events_filter_test.h
trace_events_hist.c	tracing: Check field value in hist_field_name()	2023-03-22 13:28:08 +01:00
trace_events_trigger.c	tracing: Dump stacktrace trigger to the corresponding instance	2022-04-27 13:50:45 +02:00
trace_export.c
trace_functions.c
trace_functions_graph.c
trace_hwlat.c
trace_irqsoff.c
trace_kdb.c
trace_kprobe.c	tracing: Fix return value of __setup handlers	2022-03-08 19:07:50 +01:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_mmiotrace.c
trace_nop.c
trace_output.c	tracing: Make sure trace_printk() can output as soon as it can be used	2023-02-06 07:52:43 +01:00
trace_output.h
trace_preemptirq.c	tracing: hold caller_addr to hardirq_{enable,disable}_ip	2022-09-28 11:03:57 +02:00
trace_printk.c
trace_probe.c	tracing/probes: Have kprobes and uprobes use $COMM too	2022-08-25 11:18:39 +02:00
trace_probe.h
trace_probe_tmpl.h
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest.c
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_syscalls.c
trace_uprobe.c
tracing_map.c
tracing_map.h