CVE-2023-53659

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iavf: Fix out-of-bounds when setting channels on remove<br /> <br /> If we set channels greater during iavf_remove(), and waiting reset done<br /> would be timeout, then returned with error but changed num_active_queues<br /> directly, that will lead to OOB like the following logs. Because the<br /> num_active_queues is greater than tx/rx_rings[] allocated actually.<br /> <br /> Reproducer:<br /> <br /> [root@host ~]# cat repro.sh<br /> #!/bin/bash<br /> <br /> pf_dbsf="0000:41:00.0"<br /> vf0_dbsf="0000:41:02.0"<br /> g_pids=()<br /> <br /> function do_set_numvf()<br /> {<br /> echo 2 &gt;/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs<br /> sleep $((RANDOM%3+1))<br /> echo 0 &gt;/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs<br /> sleep $((RANDOM%3+1))<br /> }<br /> <br /> function do_set_channel()<br /> {<br /> local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)<br /> [ -z "$nic" ] &amp;&amp; { sleep $((RANDOM%3)) ; return 1; }<br /> ifconfig $nic 192.168.18.5 netmask 255.255.255.0<br /> ifconfig $nic up<br /> ethtool -L $nic combined 1<br /> ethtool -L $nic combined 4<br /> sleep $((RANDOM%3))<br /> }<br /> <br /> function on_exit()<br /> {<br /> local pid<br /> for pid in "${g_pids[@]}"; do<br /> kill -0 "$pid" &amp;&gt;/dev/null &amp;&amp; kill "$pid" &amp;&gt;/dev/null<br /> done<br /> g_pids=()<br /> }<br /> <br /> trap "on_exit; exit" EXIT<br /> <br /> while :; do do_set_numvf ; done &amp;<br /> g_pids+=($!)<br /> while :; do do_set_channel ; done &amp;<br /> g_pids+=($!)<br /> <br /> wait<br /> <br /> Result:<br /> <br /> [ 3506.152887] iavf 0000:41:02.0: Removing device<br /> [ 3510.400799] ==================================================================<br /> [ 3510.400820] BUG: KASAN: slab-out-of-bounds in iavf_free_all_tx_resources+0x156/0x160 [iavf]<br /> [ 3510.400823] Read of size 8 at addr ffff88b6f9311008 by task repro.sh/55536<br /> [ 3510.400823]<br /> [ 3510.400830] CPU: 101 PID: 55536 Comm: repro.sh Kdump: loaded Tainted: G O --------- -t - 4.18.0 #1<br /> [ 3510.400832] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021<br /> [ 3510.400835] Call Trace:<br /> [ 3510.400851] dump_stack+0x71/0xab<br /> [ 3510.400860] print_address_description+0x6b/0x290<br /> [ 3510.400865] ? iavf_free_all_tx_resources+0x156/0x160 [iavf]<br /> [ 3510.400868] kasan_report+0x14a/0x2b0<br /> [ 3510.400873] iavf_free_all_tx_resources+0x156/0x160 [iavf]<br /> [ 3510.400880] iavf_remove+0x2b6/0xc70 [iavf]<br /> [ 3510.400884] ? iavf_free_all_rx_resources+0x160/0x160 [iavf]<br /> [ 3510.400891] ? wait_woken+0x1d0/0x1d0<br /> [ 3510.400895] ? notifier_call_chain+0xc1/0x130<br /> [ 3510.400903] pci_device_remove+0xa8/0x1f0<br /> [ 3510.400910] device_release_driver_internal+0x1c6/0x460<br /> [ 3510.400916] pci_stop_bus_device+0x101/0x150<br /> [ 3510.400919] pci_stop_and_remove_bus_device+0xe/0x20<br /> [ 3510.400924] pci_iov_remove_virtfn+0x187/0x420<br /> [ 3510.400927] ? pci_iov_add_virtfn+0xe10/0xe10<br /> [ 3510.400929] ? pci_get_subsys+0x90/0x90<br /> [ 3510.400932] sriov_disable+0xed/0x3e0<br /> [ 3510.400936] ? bus_find_device+0x12d/0x1a0<br /> [ 3510.400953] i40e_free_vfs+0x754/0x1210 [i40e]<br /> [ 3510.400966] ? i40e_reset_all_vfs+0x880/0x880 [i40e]<br /> [ 3510.400968] ? pci_get_device+0x7c/0x90<br /> [ 3510.400970] ? pci_get_subsys+0x90/0x90<br /> [ 3510.400982] ? pci_vfs_assigned.part.7+0x144/0x210<br /> [ 3510.400987] ? __mutex_lock_slowpath+0x10/0x10<br /> [ 3510.400996] i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]<br /> [ 3510.401001] sriov_numvfs_store+0x214/0x290<br /> [ 3510.401005] ? sriov_totalvfs_show+0x30/0x30<br /> [ 3510.401007] ? __mutex_lock_slowpath+0x10/0x10<br /> [ 3510.401011] ? __check_object_size+0x15a/0x350<br /> [ 3510.401018] kernfs_fop_write+0x280/0x3f0<br /> [ 3510.401022] vfs_write+0x145/0x440<br /> [ 3510.401025] ksys_write+0xab/0x160<br /> [ 3510.401028] ? __ia32_sys_read+0xb0/0xb0<br /> [ 3510.401031] ? fput_many+0x1a/0x120<br /> [ 3510.401032] ? filp_close+0xf0/0x130<br /> [ 3510.401038] do_syscall_64+0xa0/0x370<br /> [ 3510.401041] ? page_fault+0x8/0x30<br /> [ 3510.401043] entry_SYSCALL_64_after_hwframe+0x65/0xca<br /> [ 3510.401073] RIP: 0033:0x7f3a9bb842c0<br /> [ 3510.401079] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 3d <br /> ---truncated---