Pengpeng Hou 83f2daf529 tracing/probe: reject non-closed empty immediate strings ...

[ Upstream commit 4346be6577 ]

parse_probe_arg() accepts quoted immediate strings and passes the body
after the opening quote to __parse_imm_string(). That helper currently
computes strlen(str) and immediately dereferences str[len - 1], which
underflows when the body is empty and not closed with double-quotation.

Reject empty non-closed immediate strings before checking for the closing quote.

Link: https://lore.kernel.org/all/20260401160315.88518-1-pengpeng@iscas.ac.cn/

Fixes: a42e3c4de9 ("tracing/probe: Add immediate string parameter support")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-04-22 13:18:52 +02:00

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rv

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blktrace.c

blktrace: fix __this_cpu_read/write in preemptible context

2026-04-18 10:41:56 +02:00

bpf_trace.c

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bpf_trace.h

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error_report-traces.c

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fgraph.c

fgraph: Do not call handlers direct when not using ftrace_ops

2026-03-04 07:21:59 -05:00

fprobe.c

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ftrace_internal.h

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ftrace.c

kallsyms/ftrace: set module buildid in ftrace_mod_address_lookup()

2026-03-04 07:20:02 -05:00

Kconfig

fgraph: Replace fgraph_ret_regs with ftrace_regs

2026-03-04 07:19:36 -05:00

kprobe_event_gen_test.c

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Makefile

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pid_list.c

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pid_list.h

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power-traces.c

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preemptirq_delay_test.c

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rethook.c

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ring_buffer_benchmark.c

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ring_buffer.c

ring-buffer: Fix to update per-subbuf entries of persistent ring buffer

2026-03-25 11:08:56 +01:00

rpm-traces.c

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synth_event_gen_test.c

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trace_benchmark.c

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trace_benchmark.h

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trace_boot.c

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trace_branch.c

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trace_btf.c

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trace_btf.h

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trace_clock.c

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trace_dynevent.c

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trace_dynevent.h

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trace_entries.h

tracing: Fix ftrace event field alignments

2026-02-11 13:40:18 +01:00

trace_eprobe.c

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trace_event_perf.c

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trace_events_filter_test.h

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trace_events_filter.c

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trace_events_hist.c

tracing: Fix checking of freed trace_event_file for hist files

2026-03-04 07:21:59 -05:00

trace_events_inject.c

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trace_events_synth.c

tracing: Fix crash on synthetic stacktrace field usage

2026-01-30 10:28:46 +01:00

trace_events_trigger.c

tracing: Add NULL pointer check to trigger_data_free()

2026-03-13 17:20:47 +01:00

trace_events_user.c

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trace_events.c

tracing: Fix enabling multiple events on the kernel command line and bootconfig

2026-03-25 11:08:37 +01:00

trace_export.c

tracing: Fix ftrace event field alignments

2026-02-11 13:40:18 +01:00

trace_fprobe.c

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace_functions_graph.c

fgraph: Fix thresh_return clear per-task notrace

2026-03-25 11:08:43 +01:00

trace_functions.c

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trace_hwlat.c

tracing: Fix false sharing in hwlat get_sample()

2026-03-04 07:21:21 -05:00

trace_irqsoff.c

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trace_kdb.c

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trace_kprobe_selftest.c

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trace_kprobe_selftest.h

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trace_kprobe.c

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace_mmiotrace.c

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trace_nop.c

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trace_osnoise.c

tracing: Fix potential deadlock in cpu hotplug with osnoise

2026-04-02 13:09:49 +02:00

trace_output.c

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trace_output.h

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trace_preemptirq.c

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trace_printk.c

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trace_probe_kernel.h

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trace_probe_tmpl.h

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trace_probe.c

tracing/probe: reject non-closed empty immediate strings

2026-04-22 13:18:52 +02:00

trace_probe.h

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace_recursion_record.c

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trace_sched_switch.c

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trace_sched_wakeup.c

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trace_selftest_dynamic.c

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trace_selftest.c

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trace_seq.c

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trace_stack.c

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trace_stat.c

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trace_stat.h

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trace_synth.h

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trace_syscalls.c

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trace_uprobe.c

tracing: Fix race condition in kprobe initialization causing NULL pointer dereference

2025-10-19 16:34:01 +02:00

trace.c

tracing: Add recursion protection in kernel stack trace recording

2026-03-25 11:08:44 +01:00

trace.h

tracing: Fix ftrace event field alignments

2026-02-11 13:40:18 +01:00

tracing_map.c

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tracing_map.h

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