fprobe: Fix to ensure the number of active retprobes is not zero

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[ Upstream commit 700b2b4397 ]

The number of active retprobes can be zero but it is not acceptable,
so return EINVAL error if detected.

Link: https://lore.kernel.org/all/169750018550.186853.11198884812017796410.stgit@devnote2/

Reported-by: wuqiang.matt <wuqiang.matt@bytedance.com>
Closes: https://lore.kernel.org/all/20231016222103.cb9f426edc60220eabd8aa6a@kernel.org/
Fixes: 5b0ab78998 ("fprobe: Add exit_handler support")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Masami Hiramatsu (Google) 2023-10-17 08:49:45 +09:00 • committed by Greg Kroah-Hartman

parent f177a579d2

commit df2cc87f2c

1 changed files with 3 additions and 3 deletions

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kernel/trace/fprobe.c

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