From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 DB51D15530C; Thu, 15 Jan 2026 17:20:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497609; cv=none; b=Y4uM/ScqLzj3mogwF2qzSBI9yxGFHkljvanXFw9kQL9m5nctmn/K0RmnPHkaoJV5orbb2VdtuUhCtGFsETF4qVZbcrEtRbU1ghXJI4Ax1OfZdi3IHfYA4l1XKOBRAjYuEm+NBqZaeriiyiA6cLVJ8A1iASBjRlFhdJcWk0icVVo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497609; c=relaxed/simple; bh=GivHQIFwhmiC4F9aSfR4UZD1MxzU+dd3LBSo937oyvw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SuCpY5bLBNkUTvlAnzjpkCLihDCu7f75aWQnUhHdzJEtd7OXzpFH8arCqJgnxXtF/M84ewRGNW2YsZcp8/Xj8tuZesRdcl53Q7C+cD0929TcJ4+EdI1+s/jjpdAJQ7oMzQX4Gq9UYj+zQQFZwsfq6Ch2w11uC/0PM7Qohj+xVng= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Kq+PEyZn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Kq+PEyZn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65548C16AAE; Thu, 15 Jan 2026 17:20:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768497609; bh=GivHQIFwhmiC4F9aSfR4UZD1MxzU+dd3LBSo937oyvw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kq+PEyZnzSp/CtgjS5K0FglhKkFlzw62YznDP4Y/VTz2oeGfv5gfCO+bQjbl8CkSe DKdfX8iel5m0DTjT7fkQQ3w70LVDE8ghu8uBoFH99BQlsL2zNU1vXscokYz2GrTWnv 5g7rH4qgQxJmVJcDM4JYtPRWjWSNqNztecwgRWNc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Krzysztof Czurylo , Tatyana Nikolova , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.15 142/554] RDMA/irdma: Fix data race in irdma_free_pble Date: Thu, 15 Jan 2026 17:43:28 +0100 Message-ID: <20260115164251.391252814@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Krzysztof Czurylo [ Upstream commit 81f44409fb4f027d1e6d54edbeba5156ad94b214 ] Protects pble_rsrc counters with mutex to prevent data race. Fixes the following data race in irdma_free_pble reported by KCSAN: BUG: KCSAN: data-race in irdma_free_pble [irdma] / irdma_free_pble [irdma] write to 0xffff91430baa0078 of 8 bytes by task 16956 on cpu 5: irdma_free_pble+0x3b/0xb0 [irdma] irdma_dereg_mr+0x108/0x110 [irdma] ib_dereg_mr_user+0x74/0x160 [ib_core] uverbs_free_mr+0x26/0x30 [ib_uverbs] destroy_hw_idr_uobject+0x4a/0x90 [ib_uverbs] uverbs_destroy_uobject+0x7b/0x330 [ib_uverbs] uobj_destroy+0x61/0xb0 [ib_uverbs] ib_uverbs_run_method+0x1f2/0x380 [ib_uverbs] ib_uverbs_cmd_verbs+0x365/0x440 [ib_uverbs] ib_uverbs_ioctl+0x111/0x190 [ib_uverbs] __x64_sys_ioctl+0xc9/0x100 do_syscall_64+0x44/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 read to 0xffff91430baa0078 of 8 bytes by task 16953 on cpu 2: irdma_free_pble+0x23/0xb0 [irdma] irdma_dereg_mr+0x108/0x110 [irdma] ib_dereg_mr_user+0x74/0x160 [ib_core] uverbs_free_mr+0x26/0x30 [ib_uverbs] destroy_hw_idr_uobject+0x4a/0x90 [ib_uverbs] uverbs_destroy_uobject+0x7b/0x330 [ib_uverbs] uobj_destroy+0x61/0xb0 [ib_uverbs] ib_uverbs_run_method+0x1f2/0x380 [ib_uverbs] ib_uverbs_cmd_verbs+0x365/0x440 [ib_uverbs] ib_uverbs_ioctl+0x111/0x190 [ib_uverbs] __x64_sys_ioctl+0xc9/0x100 do_syscall_64+0x44/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 value changed: 0x0000000000005a62 -> 0x0000000000005a68 Fixes: e8c4dbc2fcac ("RDMA/irdma: Add PBLE resource manager") Signed-off-by: Krzysztof Czurylo Signed-off-by: Tatyana Nikolova Link: https://patch.msgid.link/20251125025350.180-3-tatyana.e.nikolova@intel.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/irdma/pble.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/irdma/pble.c b/drivers/infiniband/hw/irdma/pble.c index 6562592695b70..f4d5d1cee681f 100644 --- a/drivers/infiniband/hw/irdma/pble.c +++ b/drivers/infiniband/hw/irdma/pble.c @@ -507,12 +507,14 @@ enum irdma_status_code irdma_get_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, void irdma_free_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, struct irdma_pble_alloc *palloc) { - pble_rsrc->freedpbles += palloc->total_cnt; - if (palloc->level == PBLE_LEVEL_2) free_lvl2(pble_rsrc, palloc); else irdma_prm_return_pbles(&pble_rsrc->pinfo, &palloc->level1.chunkinfo); + + mutex_lock(&pble_rsrc->pble_mutex_lock); + pble_rsrc->freedpbles += palloc->total_cnt; pble_rsrc->stats_alloc_freed++; + mutex_unlock(&pble_rsrc->pble_mutex_lock); } -- 2.51.0