twx-linux/kernel/trace
Di Shen 4e2e6841ff bpf: Revert "bpf: remove unnecessary rcu_read_{lock,unlock}() in multi-uprobe attach logic"
This reverts commit 4a8f635a6054.

Althought get_pid_task() internally already calls rcu_read_lock() and
rcu_read_unlock(), the find_vpid() was not.

The documentation for find_vpid() clearly states:
"Must be called with the tasklist_lock or rcu_read_lock() held."

Add proper rcu_read_lock/unlock() to protect the find_vpid().

Fixes: 4a8f635a6054 ("bpf: remove unnecessary rcu_read_{lock,unlock}() in multi-uprobe attach logic")
Reported-by: Xuewen Yan <xuewen.yan@unisoc.com>
Signed-off-by: Di Shen <di.shen@unisoc.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20250520054943.5002-1-xuewen.yan@unisoc.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-05-22 07:49:32 -07:00
..
rv rv: Fix out-of-bound memory access in rv_is_container_monitor() 2025-04-12 12:13:30 -04:00
blktrace.c blktrace: remove redundant return at end of function 2024-12-23 08:17:23 -07:00
bpf_trace.c bpf: Revert "bpf: remove unnecessary rcu_read_{lock,unlock}() in multi-uprobe attach logic" 2025-05-22 07:49:32 -07:00
bpf_trace.h
error_report-traces.c
fgraph.c fgraph: Correct typo in ftrace_return_to_handler comment 2025-03-04 11:15:50 -05:00
fprobe.c tracing: fprobe: Cleanup fprobe hash when module unloading 2025-04-08 08:46:25 +09:00
ftrace_internal.h function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE 2024-06-10 18:08:23 -04:00
ftrace.c ftrace: fix incorrect hash size in register_ftrace_direct() 2025-04-17 15:16:51 -04:00
Kconfig ftrace: Have tracing function args depend on PROBE_EVENTS_BTF_ARGS 2025-04-02 09:50:56 -04:00
kprobe_event_gen_test.c
Makefile
pid_list.c pid: allow pid_max to be set per pid namespace 2024-12-02 11:25:25 +01:00
pid_list.h
power-traces.c
preemptirq_delay_test.c minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
rethook.c
ring_buffer_benchmark.c ring-buffer: Use str_low_high() helper in ring_buffer_producer() 2024-10-19 11:12:25 -04:00
ring_buffer.c Persistent buffer cleanups and simplifications for v6.15: 2025-04-03 16:09:29 -07:00
rpm-traces.c
synth_event_gen_test.c
trace_benchmark.c
trace_benchmark.h
trace_boot.c
trace_branch.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_btf.c
trace_btf.h
trace_clock.c tracing: Use atomic64_inc_return() in trace_clock_counter() 2024-10-09 19:59:49 -04:00
trace_dynevent.c tracing/string: Create and use __free(argv_free) in trace_dynevent.c 2024-12-26 10:38:37 -05:00
trace_dynevent.h
trace_entries.h ftrace: Fix type of ftrace_graph_ent_entry.depth 2025-04-17 15:19:15 -04:00
trace_eprobe.c Probes updates for v6.15: 2025-03-27 19:31:34 -07:00
trace_event_perf.c perf: Remove unnecessary parameter of security check 2025-02-26 14:13:58 -05:00
trace_events_filter_test.h
trace_events_filter.c tracing: Fix filter string testing 2025-04-17 22:16:56 -04:00
trace_events_hist.c tracing updates for v6.15: 2025-03-27 16:22:12 -07:00
trace_events_inject.c tracing: Have format file honor EVENT_FILE_FL_FREED 2024-08-07 18:12:46 -04:00
trace_events_synth.c tracing: Do not add length to print format in synthetic events 2025-04-09 11:34:21 -04:00
trace_events_trigger.c tracing: Constify struct event_trigger_ops 2025-03-20 07:04:00 -04:00
trace_events_user.c tracing/user_events: Slightly simplify user_seq_show() 2025-03-06 13:35:27 -05:00
trace_events.c tracing: Verify event formats that have "%*p.." 2025-04-02 09:51:26 -04:00
trace_export.c
trace_fprobe.c Probes fixes for v6.14: 2025-04-08 12:51:34 -07:00
trace_functions_graph.c ftrace: Do not have print_graph_retval() add a newline 2025-04-12 12:13:30 -04:00
trace_functions.c ftrace: Add arguments to function tracer 2025-03-04 11:27:24 -05:00
trace_hwlat.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_irqsoff.c tracing: Fix use-after-free in print_graph_function_flags during tracer switching 2025-03-22 05:42:42 -04:00
trace_kdb.c trace: kdb: Replace simple_strtoul with kstrtoul in kdb_ftdump 2024-11-02 08:33:13 +00:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c Modules changes for 6.15-rc1 2025-03-30 15:44:36 -07:00
trace_mmiotrace.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_nop.c
trace_osnoise.c tracing updates for v6.15: 2025-03-27 16:22:12 -07:00
trace_output.c ring-buffer updates for v6.15 2025-03-31 13:37:22 -07:00
trace_output.h ftrace: Add print_function_args() 2025-03-04 11:27:23 -05:00
trace_preemptirq.c tracing: Fix archs that still call tracepoints without RCU watching 2024-12-05 09:28:58 -05:00
trace_printk.c
trace_probe_kernel.h
trace_probe_tmpl.h tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS 2024-12-26 10:50:04 -05:00
trace_probe.c tracing: probe-events: Add comments about entry data storing code 2025-03-27 21:19:54 +09:00
trace_probe.h tracing: probe-events: Log error for exceeding the number of arguments 2025-03-27 21:19:54 +09:00
trace_recursion_record.c
trace_sched_switch.c pid: allow pid_max to be set per pid namespace 2024-12-02 11:25:25 +01:00
trace_sched_wakeup.c tracing: Fix use-after-free in print_graph_function_flags during tracer switching 2025-03-22 05:42:42 -04:00
trace_selftest_dynamic.c
trace_selftest.c fgraph: Pass ftrace_regs to retfunc 2024-12-26 10:50:03 -05:00
trace_seq.c
trace_stack.c tracing: Switch trace_stack.c code over to use guard() 2024-12-26 10:38:37 -05:00
trace_stat.c tracing: Switch trace_stat.c code over to use guard() 2024-12-26 10:38:37 -05:00
trace_stat.h
trace_synth.h
trace_syscalls.c tracing/perf: Add might_fault check to syscall probes 2024-10-09 17:09:46 -04:00
trace_uprobe.c bpf: Add support to retrieve ref_ctr_offset for uprobe perf link 2025-05-09 13:01:07 -07:00
trace.c tracing: Hide get_vm_area() from MMUless builds 2025-04-07 12:02:11 -04:00
trace.h Persistent buffer cleanups and simplifications for v6.15: 2025-04-03 16:09:29 -07:00
tracing_map.c tracing: Fix cmp_entries_dup() to respect sort() comparison rules 2024-12-04 10:38:24 -05:00
tracing_map.h