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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Sibi Sankar <sibis@codeaurora.org>,
	Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Subject: [PATCH 4.9 03/49] remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load
Date: Mon, 22 Feb 2021 13:36:01 +0100
Message-ID: <20210222121023.011821363@linuxfoundation.org> (raw)
In-Reply-To: <20210222121022.546148341@linuxfoundation.org>

From: Sibi Sankar <sibis@codeaurora.org>

commit e013f455d95add874f310dc47c608e8c70692ae5 upstream

The following mem abort is observed when the mba firmware size exceeds
the allocated mba region. MBA firmware size is restricted to a maximum
size of 1M and remaining memory region is used by modem debug policy
firmware when available. Hence verify whether the MBA firmware size lies
within the allocated memory region and is not greater than 1M before
loading.

Err Logs:
Unable to handle kernel paging request at virtual address
Mem abort info:
...
Call trace:
  __memcpy+0x110/0x180
  rproc_start+0x40/0x218
  rproc_boot+0x5b4/0x608
  state_store+0x54/0xf8
  dev_attr_store+0x44/0x60
  sysfs_kf_write+0x58/0x80
  kernfs_fop_write+0x140/0x230
  vfs_write+0xc4/0x208
  ksys_write+0x74/0xf8
  __arm64_sys_write+0x24/0x30
...

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: 051fb70fd4ea4 ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5")
Cc: stable@vger.kernel.org
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/20200722201047.12975-2-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[sudip: manual backport to old file path]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/remoteproc/qcom_q6v5_pil.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -193,6 +193,12 @@ static int q6v5_load(struct rproc *rproc
 {
 	struct q6v5 *qproc = rproc->priv;
 
+	/* MBA is restricted to a maximum size of 1M */
+	if (fw->size > qproc->mba_size || fw->size > SZ_1M) {
+		dev_err(qproc->dev, "MBA firmware load failed\n");
+		return -EINVAL;
+	}
+
 	memcpy(qproc->mba_region, fw->data, fw->size);
 
 	return 0;



  parent reply index

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-22 12:35 [PATCH 4.9 00/49] 4.9.258-rc1 review Greg Kroah-Hartman
2021-02-22 12:35 ` [PATCH 4.9 01/49] mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 02/49] fgraph: Initialize tracing_graph_pause at task creation Greg Kroah-Hartman
2021-02-22 12:36 ` Greg Kroah-Hartman [this message]
2021-02-22 12:36 ` [PATCH 4.9 04/49] af_key: relax availability checks for skb size calculation Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 05/49] iwlwifi: mvm: take mutex for calling iwl_mvm_get_sync_time() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 06/49] iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 07/49] iwlwifi: mvm: guard against device removal in reprobe Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 08/49] SUNRPC: Move simple_get_bytes and simple_get_netobj into private header Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 09/49] SUNRPC: Handle 0 length opaque XDR object data properly Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 10/49] lib/string: Add strscpy_pad() function Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 11/49] include/trace/events/writeback.h: fix -Wstringop-truncation warnings Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 12/49] memcg: fix a crash in wb_workfn when a device disappears Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 13/49] futex: Ensure the correct return value from futex_lock_pi() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 14/49] futex: Change locking rules Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 15/49] futex: Cure exit race Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 16/49] squashfs: add more sanity checks in id lookup Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 17/49] squashfs: add more sanity checks in inode lookup Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 18/49] squashfs: add more sanity checks in xattr id lookup Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 19/49] tracing: Do not count ftrace events in top level enable output Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 20/49] tracing: Check length before giving out the filter buffer Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 21/49] ovl: skip getxattr of security labels Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 22/49] ARM: dts: lpc32xx: Revert set default clock rate of HCLK PLL Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 23/49] memblock: do not start bottom-up allocations with kernel_end Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 24/49] bpf: Check for integer overflow when using roundup_pow_of_two() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 25/49] netfilter: xt_recent: Fix attempt to update deleted entry Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 26/49] xen/netback: avoid race in xenvif_rx_ring_slots_available() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 27/49] netfilter: conntrack: skip identical origin tuple in same zone only Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 28/49] h8300: fix PREEMPTION build, TI_PRE_COUNT undefined Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 29/49] usb: dwc3: ulpi: fix checkpatch warning Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 30/49] usb: dwc3: ulpi: Replace CPU-based busyloop with Protocol-based one Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 31/49] net/vmw_vsock: improve locking in vsock_connect_timeout() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 32/49] net: watchdog: hold device global xmit lock during tx disable Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 33/49] vsock/virtio: update credit only if socket is not closed Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 34/49] vsock: fix locking in vsock_shutdown() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 35/49] x86/build: Disable CET instrumentation in the kernel for 32-bit too Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 36/49] trace: Use -mcount-record for dynamic ftrace Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 37/49] tracing: Fix SKIP_STACK_VALIDATION=1 build due to bad merge with -mrecord-mcount Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 38/49] tracing: Avoid calling cc-option -mrecord-mcount for every Makefile Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 39/49] Xen/x86: dont bail early from clear_foreign_p2m_mapping() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 40/49] Xen/x86: also check kernel mapping in set_foreign_p2m_mapping() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 41/49] Xen/gntdev: correct dev_bus_addr handling in gntdev_map_grant_pages() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 42/49] Xen/gntdev: correct error checking " Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 43/49] xen/arm: dont ignore return errors from set_phys_to_machine Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 44/49] xen-blkback: dont "handle" error by BUG() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 45/49] xen-netback: " Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 46/49] xen-scsiback: " Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 47/49] xen-blkback: fix error handling in xen_blkbk_map() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 48/49] scsi: qla2xxx: Fix crash during driver load on big endian machines Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 49/49] kvm: check tlbs_dirty directly Greg Kroah-Hartman
2021-02-22 18:24 ` [PATCH 4.9 00/49] 4.9.258-rc1 review Florian Fainelli
2021-02-22 21:27 ` Guenter Roeck
2021-02-23 12:04 ` Naresh Kamboju
2021-02-23 21:19 ` Shuah Khan

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