fprobe: Fix module reference count leak on error in register_fprobe()

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In register_fprobe(), get_ips_from_filter() resolves target function
addresses and increments module reference counts via try_module_get() for
symbols in kernel modules. If get_ips_from_filter() fails on the second
pass and returns an error, register_fprobe() returned directly without
releasing module references acquired up to that point.

Fix this by ensuring the cleanup loop executing module_put() runs even when
get_ips_from_filter() returns a negative error.

Link: https://lore.kernel.org/all/178528125360.101985.4144133640239273153.stgit@devnote2/

Fixes: d24fa977ee ("tracing: fprobe: Fix to lock module while registering fprobe")
Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

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This commit is contained in:

Masami Hiramatsu (Google) 2026-07-29 08:27:33 +09:00

parent aca0cd1bf1

commit 8cf2f40ceb

1 changed files with 2 additions and 4 deletions

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kernel/trace/fprobe.c

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