From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Xiaomeng Tong <xiam0nd.tong@gmail.com>,
Vinod Koul <vkoul@kernel.org>
Subject: [PATCH 4.19 30/53] dma: at_xdmac: fix a missing check on list iterator
Date: Tue, 26 Apr 2022 10:21:10 +0200 [thread overview]
Message-ID: <20220426081736.533147335@linuxfoundation.org> (raw)
In-Reply-To: <20220426081735.651926456@linuxfoundation.org>
From: Xiaomeng Tong <xiam0nd.tong@gmail.com>
commit 206680c4e46b62fd8909385e0874a36952595b85 upstream.
The bug is here:
__func__, desc, &desc->tx_dma_desc.phys, ret, cookie, residue);
The list iterator 'desc' will point to a bogus position containing
HEAD if the list is empty or no element is found. To avoid dev_dbg()
prints a invalid address, use a new variable 'iter' as the list
iterator, while use the origin variable 'desc' as a dedicated
pointer to point to the found element.
Cc: stable@vger.kernel.org
Fixes: 82e2424635f4c ("dmaengine: xdmac: fix print warning on dma_addr_t variable")
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Link: https://lore.kernel.org/r/20220327061154.4867-1-xiam0nd.tong@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/dma/at_xdmac.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1390,7 +1390,7 @@ at_xdmac_tx_status(struct dma_chan *chan
{
struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
struct at_xdmac *atxdmac = to_at_xdmac(atchan->chan.device);
- struct at_xdmac_desc *desc, *_desc;
+ struct at_xdmac_desc *desc, *_desc, *iter;
struct list_head *descs_list;
enum dma_status ret;
int residue, retry;
@@ -1505,11 +1505,13 @@ at_xdmac_tx_status(struct dma_chan *chan
* microblock.
*/
descs_list = &desc->descs_list;
- list_for_each_entry_safe(desc, _desc, descs_list, desc_node) {
- dwidth = at_xdmac_get_dwidth(desc->lld.mbr_cfg);
- residue -= (desc->lld.mbr_ubc & 0xffffff) << dwidth;
- if ((desc->lld.mbr_nda & 0xfffffffc) == cur_nda)
+ list_for_each_entry_safe(iter, _desc, descs_list, desc_node) {
+ dwidth = at_xdmac_get_dwidth(iter->lld.mbr_cfg);
+ residue -= (iter->lld.mbr_ubc & 0xffffff) << dwidth;
+ if ((iter->lld.mbr_nda & 0xfffffffc) == cur_nda) {
+ desc = iter;
break;
+ }
}
residue += cur_ubc << dwidth;
next prev parent reply other threads:[~2022-04-26 8:39 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-26 8:20 [PATCH 4.19 00/53] 4.19.240-rc1 review Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 01/53] etherdevice: Adjust ether_addr* prototypes to silence -Wstringop-overead Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 02/53] mm: page_alloc: fix building error on -Werror=array-compare Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 03/53] tracing: Dump stacktrace trigger to the corresponding instance Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 04/53] can: usb_8dev: usb_8dev_start_xmit(): fix double dev_kfree_skb() in error path Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 05/53] dm integrity: fix memory corruption when tag_size is less than digest size Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 06/53] gfs2: assign rgrp glock before compute_bitstructs Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 07/53] ALSA: usb-audio: Clear MIDI port active flag after draining Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 08/53] tcp: fix race condition when creating child sockets from syncookies Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 09/53] tcp: Fix potential use-after-free due to double kfree() Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 10/53] ASoC: atmel: Remove system clock tree configuration for at91sam9g20ek Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 11/53] ASoC: msm8916-wcd-digital: Check failure for devm_snd_soc_register_component Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 12/53] dmaengine: imx-sdma: Fix error checking in sdma_event_remap Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 13/53] rxrpc: Restore removed timer deletion Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 14/53] net/packet: fix packet_sock xmit return value checking Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 15/53] net/sched: cls_u32: fix possible leak in u32_init_knode() Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 16/53] netlink: reset network and mac headers in netlink_dump() Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 17/53] ARM: vexpress/spc: Avoid negative array index when !SMP Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 18/53] reset: tegra-bpmp: Restore Handle errors in BPMP response Greg Kroah-Hartman
2022-04-26 8:20 ` [PATCH 4.19 19/53] platform/x86: samsung-laptop: Fix an unsigned comparison which can never be negative Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 20/53] ALSA: usb-audio: Fix undefined behavior due to shift overflowing the constant Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 21/53] vxlan: fix error return code in vxlan_fdb_append Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 22/53] cifs: Check the IOCB_DIRECT flag, not O_DIRECT Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 23/53] mt76: Fix undefined behavior due to shift overflowing the constant Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 24/53] brcmfmac: sdio: " Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 25/53] dpaa_eth: Fix missing of_node_put in dpaa_get_ts_info() Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 26/53] drm/msm/mdp5: check the return of kzalloc() Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 27/53] net: macb: Restart tx only if queue pointer is lagging Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 28/53] stat: fix inconsistency between struct stat and struct compat_stat Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 29/53] ata: pata_marvell: Check the bmdma_addr beforing reading Greg Kroah-Hartman
2022-04-26 8:21 ` Greg Kroah-Hartman [this message]
2022-04-26 8:21 ` [PATCH 4.19 31/53] drm/panel/raspberrypi-touchscreen: Avoid NULL deref if not initialised Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 32/53] drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 33/53] powerpc/perf: Fix power9 event alternatives Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 34/53] openvswitch: fix OOB access in reserve_sfa_size() Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 35/53] ASoC: soc-dapm: fix two incorrect uses of list iterator Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 36/53] e1000e: Fix possible overflow in LTR decoding Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 37/53] ARC: entry: fix syscall_trace_exit argument Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 38/53] arm_pmu: Validate single/group leader events Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 39/53] ext4: fix symlink file size not match to file content Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 40/53] ext4: limit length to bitmap_maxbytes - blocksize in punch_hole Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 41/53] ext4: fix overhead calculation to account for the reserved gdt blocks Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 42/53] ext4: force overhead calculation if the s_overhead_cluster makes no sense Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 43/53] staging: ion: Prevent incorrect reference counting behavour Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 44/53] block/compat_ioctl: fix range check in BLKGETSIZE Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 45/53] ax25: add refcount in ax25_dev to avoid UAF bugs Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 46/53] ax25: fix reference count leaks of ax25_dev Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 47/53] ax25: fix UAF bugs of net_device caused by rebinding operation Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 48/53] ax25: Fix refcount leaks caused by ax25_cb_del() Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 49/53] ax25: fix UAF bug in ax25_send_control() Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 50/53] ax25: fix NPD bug in ax25_disconnect Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 51/53] ax25: Fix NULL pointer dereferences in ax25 timers Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 52/53] ax25: Fix UAF bugs " Greg Kroah-Hartman
2022-04-26 8:21 ` [PATCH 4.19 53/53] Revert "net: micrel: fix KS8851_MLL Kconfig" Greg Kroah-Hartman
2022-04-26 20:00 ` [PATCH 4.19 00/53] 4.19.240-rc1 review Pavel Machek
2022-04-27 11:39 ` Greg Kroah-Hartman
2022-04-29 7:43 ` [PATCH 4.19 00/53] 4.19.240-rc1 review [net: ethernet: stmmac: fix altr_tse_pcs function when using a] Pavel Machek
2022-04-29 9:22 ` Greg Kroah-Hartman
2022-04-29 15:53 ` Dinh Nguyen
2022-04-30 7:56 ` Pavel Machek
2022-04-26 20:12 ` [PATCH 4.19 00/53] 4.19.240-rc1 review Guenter Roeck
2022-04-26 20:15 ` Shuah Khan
2022-04-27 7:05 ` Samuel Zou
2022-04-27 8:30 ` Naresh Kamboju
2022-04-27 11:07 ` Sudip Mukherjee
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