Probes fixes for v7.2-rc4:

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- tracing/probes: Avoid temporary buffer truncation in match_command_args()
   Compare argument name, delimiter, and comm expression directly instead of
   formatting into a stack buffer to prevent false matching failures.
 
 - tracing/probes: Prevent out-of-bounds write in __trace_probe_log_err()
   Return early when trace_probe_log.argc is zero to prevent out-of-bounds
   access when constructing the formatted error command string.
 
 - tracing/probes: Fix potential underflow in LEN_OR_ZERO macro
   Ensure buffer length is greater than current position before subtraction
   to prevent unsigned size underflow when formatting print strings.
 
 - tracing/eprobe: Fix exact system name matching in eprobe_dyn_event_match()
   Check system name null-termination to avoid partial prefix matching when
   comparing event probe target system names.
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Merge tag 'probes-fixes-v7.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull probes fixes from Masami Hiramatsu:

 - Avoid temporary buffer truncation in match_command_args()

   Compare argument name, delimiter, and comm expression directly
   instead of formatting into a stack buffer to prevent false
   matching failures

 - Prevent out-of-bounds write in __trace_probe_log_err()

   Return early when trace_probe_log.argc is zero to prevent
   out-of-bounds access when constructing the formatted error
   command string

 - Fix potential underflow in LEN_OR_ZERO macro

   Ensure buffer length is greater than current position before
   subtraction to prevent unsigned size underflow when formatting
   print strings

 - Fix exact system name matching in eprobe_dyn_event_match()

   Check system name null-termination to avoid partial prefix
   matching when comparing event probe target system names

* tag 'probes-fixes-v7.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing/eprobe: Fix exact system name matching in eprobe_dyn_event_match()
  tracing/probes: Fix potential underflow in LEN_OR_ZERO macro
  tracing/probes: Prevent out-of-bounds write in __trace_probe_log_err()
  tracing/probes: Avoid temporary buffer truncation in trace_probe_match_command_args()

...

This commit is contained in:

Linus Torvalds 2026-07-21 08:18:27 -07:00

parent 51f247c4b2 f418d68d71

commit cdb65777c4

2 changed files with 9 additions and 7 deletions

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3

kernel/trace/trace_eprobe.c

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13

kernel/trace/trace_probe.c

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