From: Takashi Iwai <tiwai@suse.de>
To: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Takashi Iwai <tiwai@suse.de>, Peter Huewe <peterhuewe@gmx.de>,
Jason Gunthorpe <jgg@ziepe.ca>,
linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tpm: acpi: Fix memory leak at tpm_read_log_acpi() error path
Date: Mon, 09 Nov 2026 16:55:03 +0100 [thread overview]
Message-ID: <87mrriuhig.wl-tiwai@suse.de> (raw)
In-Reply-To: <avHl-WoBP73QjInD@kernel.org>
On Mon, 09 Nov 2026 16:25:45 +0100,
Jarkko Sakkinen wrote:
>
> On Mon, Nov 09, 2026 at 09:25:24AM +0100, Takashi Iwai wrote:
> > When devm_add_action() returns an error, we do NULL-clear
> > log->bios_event_log unnecessarily before calling tpm_bios_log_free(),
> > and it would lead to a memory leak of the allocated log buffer.
>
> I don't understand this. "NULL-clear" is gibberish when the actual
> bug is just spurious clear of log->bios_event_log.
It's not "spurious", but rather ill-behaving.
Because it sets NULL before calling tpm_bios_log_free(), the actually
allocated buffer won't be freed at all.
Takashi
next prev parent reply other threads:[~2026-11-09 15:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 8:25 [PATCH] tpm: acpi: Fix memory leak at tpm_read_log_acpi() error path Takashi Iwai
2026-11-09 15:25 ` Jarkko Sakkinen
2026-11-09 15:26 ` Jarkko Sakkinen
2026-11-09 15:55 ` Takashi Iwai [this message]
2026-11-09 16:44 ` Jarkko Sakkinen
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