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Miller" , "Eric Dumazet" , Jakub Kicinski , Paolo Abeni Subject: [PATCH net v2 1/7] octeon_ep: Add checks to fix double free crashes. Date: Thu, 7 Nov 2024 05:28:40 -0800 Message-ID: <20241107132846.1118835-2-srasheed@marvell.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241107132846.1118835-1-srasheed@marvell.com> References: <20241107132846.1118835-1-srasheed@marvell.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: vXNR5pH4jkOuF_O4_aIGicqHD6ubBqwn X-Proofpoint-GUID: vXNR5pH4jkOuF_O4_aIGicqHD6ubBqwn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.687,Hydra:6.0.235,FMLib:17.0.607.475 definitions=2020-10-13_15,2020-10-13_02,2020-04-07_01 X-Patchwork-Delegate: kuba@kernel.org From: Vimlesh Kumar Add required checks to avoid double free. Crashes were observed due to the same on reset scenarios Signed-off-by: Vimlesh Kumar Signed-off-by: Shinas Rasheed --- V2: - No changes V1: https://lore.kernel.org/all/20241101103416.1064930-2-srasheed@marvell.com/ .../ethernet/marvell/octeon_ep/octep_main.c | 39 +++++++++++-------- .../net/ethernet/marvell/octeon_ep/octep_tx.c | 2 + 2 files changed, 25 insertions(+), 16 deletions(-) diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c index 549436efc204..ff72b796bd25 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c @@ -154,9 +154,11 @@ static int octep_enable_msix_range(struct octep_device *oct) */ static void octep_disable_msix(struct octep_device *oct) { - pci_disable_msix(oct->pdev); - kfree(oct->msix_entries); - oct->msix_entries = NULL; + if (oct->msix_entries) { + pci_disable_msix(oct->pdev); + kfree(oct->msix_entries); + oct->msix_entries = NULL; + } dev_info(&oct->pdev->dev, "Disabled MSI-X\n"); } @@ -496,16 +498,18 @@ static void octep_free_irqs(struct octep_device *oct) { int i; - /* First few MSI-X interrupts are non queue interrupts; free them */ - for (i = 0; i < CFG_GET_NON_IOQ_MSIX(oct->conf); i++) - free_irq(oct->msix_entries[i].vector, oct); - kfree(oct->non_ioq_irq_names); - - /* Free IRQs for Input/Output (Tx/Rx) queues */ - for (i = CFG_GET_NON_IOQ_MSIX(oct->conf); i < oct->num_irqs; i++) { - irq_set_affinity_hint(oct->msix_entries[i].vector, NULL); - free_irq(oct->msix_entries[i].vector, - oct->ioq_vector[i - CFG_GET_NON_IOQ_MSIX(oct->conf)]); + if (oct->msix_entries) { + /* First few MSI-X interrupts are non queue interrupts; free them */ + for (i = 0; i < CFG_GET_NON_IOQ_MSIX(oct->conf); i++) + free_irq(oct->msix_entries[i].vector, oct); + kfree(oct->non_ioq_irq_names); + + /* Free IRQs for Input/Output (Tx/Rx) queues */ + for (i = CFG_GET_NON_IOQ_MSIX(oct->conf); i < oct->num_irqs; i++) { + irq_set_affinity_hint(oct->msix_entries[i].vector, NULL); + free_irq(oct->msix_entries[i].vector, + oct->ioq_vector[i - CFG_GET_NON_IOQ_MSIX(oct->conf)]); + } } netdev_info(oct->netdev, "IRQs freed\n"); } @@ -635,8 +639,10 @@ static void octep_napi_delete(struct octep_device *oct) for (i = 0; i < oct->num_oqs; i++) { netdev_dbg(oct->netdev, "Deleting NAPI on Q-%d\n", i); - netif_napi_del(&oct->ioq_vector[i]->napi); - oct->oq[i]->napi = NULL; + if (oct->oq[i]->napi) { + netif_napi_del(&oct->ioq_vector[i]->napi); + oct->oq[i]->napi = NULL; + } } } @@ -666,7 +672,8 @@ static void octep_napi_disable(struct octep_device *oct) for (i = 0; i < oct->num_oqs; i++) { netdev_dbg(oct->netdev, "Disabling NAPI on Q-%d\n", i); - napi_disable(&oct->ioq_vector[i]->napi); + if (oct->oq[i]->napi) + napi_disable(&oct->ioq_vector[i]->napi); } } diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c index 06851b78aa28..157bf489ae19 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c @@ -323,6 +323,8 @@ void octep_free_iqs(struct octep_device *oct) int i; for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++) { + if (!oct->iq[i]) + continue; octep_free_iq(oct->iq[i]); dev_dbg(&oct->pdev->dev, "Successfully destroyed IQ(TxQ)-%d.\n", i);