From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2DE183019D8; Sat, 12 Sep 2026 13:45:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789220721; cv=none; b=CQTrgUy6Mmryt7nmpB1c9hokfO7zxHfFItsCVIE/STXxEOMLLtvOQ8mrAV6U+3czJCfneipGBaHnckqqneie7PZNOyYuTwbiNVEedf0jOFouPT/fM9v25xsqq+gftXRnjLvW35M5BMXaBjoma7GhRyjAmX3Bh+Yn0vaGCtbrzB4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789220721; c=relaxed/simple; bh=pepEgq+y0O0nWhMO4XddodMzeFnKoMARkQ2vICiVAqQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Bc1yYmTnDO/XGLbK8JV7EnAUu+6wSbkK/5dn2R4KCUYlBC/SGxQl2bQla2/s6kv+865muFUChWzbeBO+BHs703+guywP9dNgRkFoJdbk4IlkIZONqN/gzdDjqf6lbSUoNHWRZ9EQq3poGvRN+t3KkdBPMfS7T2hSX43JLZvOxXQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DfJhbnt7; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DfJhbnt7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C6021F000FF; Sat, 12 Sep 2026 13:45:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789220719; bh=+DsgK6pAZL70Wbmry8ysv8EpVF2tie50CXEQIgTPyxg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DfJhbnt7CsCTPROOBPdM2v4SM71HNW+lHZrNDInWm2kBES48nsLfrGomifyyFX9Gg KRX5OgVY+2TX2iHWU1MKgCOd3lH/tL99uwBFcQIKY8OGWkNg81w6scthrMfmizAT6O eNLCxh2PS4NrM4gkjWbV2sh02oVK0Z7/GTNcdaTQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fan Wu , Ulf Hansson Subject: [PATCH 6.6 0235/1424] mmc: via-sdmmc: stop card-detect handling on probe failure Date: Sat, 12 Sep 2026 08:44:27 +0200 Message-ID: <20260912065612.543637109@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fan Wu commit 088eaa92fcebaa6b957ccf9635afdf39643a577d upstream. request_irq() registers the SD card-detect interrupt and the probe enables it before mmc_add_host() runs. If mmc_add_host() fails, the error path only unmaps the registers and returns: the interrupt stays registered, so the handler keeps running against the host once it is freed. via_sdc_isr() dereferences sdhost and its MMIO base and schedules carddet_work, which via_sdc_card_detect() also runs against freed memory through its container_of() dereference. Add a probe-error path that disables and frees the interrupt and cancels carddet_work before unmapping. carddet_work can re-enable the device interrupt via via_reset_pcictrl(), which restores PCIINTCTRL, so mask it again after cancelling the work. This issue was found by an in-house static analysis tool and confirmed by manual code review. Fixes: e4e46fb61e3b ("mmc: via-sdmmc: fix return value check of mmc_add_host()") Cc: stable@vger.kernel.org Assisted-by: Codex:gpt-5.6 Signed-off-by: Fan Wu Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/via-sdmmc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/mmc/host/via-sdmmc.c +++ b/drivers/mmc/host/via-sdmmc.c @@ -1153,10 +1153,16 @@ static int via_sd_probe(struct pci_dev * ret = mmc_add_host(mmc); if (ret) - goto unmap; + goto free_irq; return 0; +free_irq: + writeb(0x0, sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL); + free_irq(pcidev->irq, sdhost); + cancel_work_sync(&sdhost->carddet_work); + /* carddet_work may re-enable the interrupt via via_reset_pcictrl(). */ + writeb(0x0, sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL); unmap: iounmap(sdhost->mmiobase); free_mmc_host: