CVE-2025-38042

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> dmaengine: ti: k3-udma-glue: Drop skip_fdq argument from k3_udma_glue_reset_rx_chn<br /> <br /> The user of k3_udma_glue_reset_rx_chn() e.g. ti_am65_cpsw_nuss can<br /> run on multiple platforms having different DMA architectures.<br /> On some platforms there can be one FDQ for all flows in the RX channel<br /> while for others there is a separate FDQ for each flow in the RX channel.<br /> <br /> So far we have been relying on the skip_fdq argument of<br /> k3_udma_glue_reset_rx_chn().<br /> <br /> Instead of relying on the user to provide this information, infer it<br /> based on DMA architecture during k3_udma_glue_request_rx_chn() and save it<br /> in an internal flag &amp;#39;single_fdq&amp;#39;. Use that flag at<br /> k3_udma_glue_reset_rx_chn() to deicide if the FDQ needs<br /> to be cleared for every flow or just for flow 0.<br /> <br /> Fixes the below issue on ti_am65_cpsw_nuss driver on AM62-SK.<br /> <br /> &gt; ip link set eth1 down<br /> &gt; ip link set eth0 down<br /> &gt; ethtool -L eth0 rx 8<br /> &gt; ip link set eth0 up<br /> &gt; modprobe -r ti_am65_cpsw_nuss<br /> <br /> [ 103.045726] ------------[ cut here ]------------<br /> [ 103.050505] k3_knav_desc_pool size 512000 != avail 64000<br /> [ 103.050703] WARNING: CPU: 1 PID: 450 at drivers/net/ethernet/ti/k3-cppi-desc-pool.c:33 k3_cppi_desc_pool_destroy+0xa0/0xa8 [k3_cppi_desc_pool]<br /> [ 103.068810] Modules linked in: ti_am65_cpsw_nuss(-) k3_cppi_desc_pool snd_soc_hdmi_codec crct10dif_ce snd_soc_simple_card snd_soc_simple_card_utils display_connector rtc_ti_k3 k3_j72xx_bandgap tidss drm_client_lib snd_soc_davinci_mcas<br /> p drm_dma_helper tps6598x phylink snd_soc_ti_udma rti_wdt drm_display_helper snd_soc_tlv320aic3x_i2c typec at24 phy_gmii_sel snd_soc_ti_edma snd_soc_tlv320aic3x sii902x snd_soc_ti_sdma sa2ul omap_mailbox drm_kms_helper authenc cfg80211 r<br /> fkill fuse drm drm_panel_orientation_quirks backlight ip_tables x_tables ipv6 [last unloaded: k3_cppi_desc_pool]<br /> [ 103.119950] CPU: 1 UID: 0 PID: 450 Comm: modprobe Not tainted 6.13.0-rc7-00001-g9c5e3435fa66 #1011<br /> [ 103.119968] Hardware name: Texas Instruments AM625 SK (DT)<br /> [ 103.119974] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)<br /> [ 103.119983] pc : k3_cppi_desc_pool_destroy+0xa0/0xa8 [k3_cppi_desc_pool]<br /> [ 103.148007] lr : k3_cppi_desc_pool_destroy+0xa0/0xa8 [k3_cppi_desc_pool]<br /> [ 103.154709] sp : ffff8000826ebbc0<br /> [ 103.158015] x29: ffff8000826ebbc0 x28: ffff0000090b6300 x27: 0000000000000000<br /> [ 103.165145] x26: 0000000000000000 x25: 0000000000000000 x24: ffff0000019df6b0<br /> [ 103.172271] x23: ffff0000019df6b8 x22: ffff0000019df410 x21: ffff8000826ebc88<br /> [ 103.179397] x20: 000000000007d000 x19: ffff00000a3b3000 x18: 0000000000000000<br /> [ 103.186522] x17: 0000000000000000 x16: 0000000000000000 x15: 000001e8c35e1cde<br /> [ 103.193647] x14: 0000000000000396 x13: 000000000000035c x12: 0000000000000000<br /> [ 103.200772] x11: 000000000000003a x10: 00000000000009c0 x9 : ffff8000826eba20<br /> [ 103.207897] x8 : ffff0000090b6d20 x7 : ffff00007728c180 x6 : ffff00007728c100<br /> [ 103.215022] x5 : 0000000000000001 x4 : ffff000000508a50 x3 : ffff7ffff6146000<br /> [ 103.222147] x2 : 0000000000000000 x1 : e300b4173ee6b200 x0 : 0000000000000000<br /> [ 103.229274] Call trace:<br /> [ 103.231714] k3_cppi_desc_pool_destroy+0xa0/0xa8 [k3_cppi_desc_pool] (P)<br /> [ 103.238408] am65_cpsw_nuss_free_rx_chns+0x28/0x4c [ti_am65_cpsw_nuss]<br /> [ 103.244942] devm_action_release+0x14/0x20<br /> [ 103.249040] release_nodes+0x3c/0x68<br /> [ 103.252610] devres_release_all+0x8c/0xdc<br /> [ 103.256614] device_unbind_cleanup+0x18/0x60<br /> [ 103.260876] device_release_driver_internal+0xf8/0x178<br /> [ 103.266004] driver_detach+0x50/0x9c<br /> [ 103.269571] bus_remove_driver+0x6c/0xbc<br /> [ 103.273485] driver_unregister+0x30/0x60<br /> [ 103.277401] platform_driver_unregister+0x14/0x20<br /> [ 103.282096] am65_cpsw_nuss_driver_exit+0x18/0xff4 [ti_am65_cpsw_nuss]<br /> [ 103.288620] __arm64_sys_delete_module+0x17c/0x25c<br /> [ 103.293404] invoke_syscall+0x44/0x100<br /> [ 103.297149] el0_svc_common.constprop.0+0xc0/0xe0<br /> [ 103.301845] do_el0_svc+0x1c/0x28<br /> [ 103.305155] el0_svc+0x28/0x98<br /> ---truncated---