Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:EOL][EOL]hv_netvsc: Fix panic during namespace deletion with VF[EOL][EOL]The existing code move the VF NIC to new namespace when NETDEV_REGISTER is[EOL]received on netvsc NIC. During deletion of the namespace,[EOL]default_device_exit_batch() >> default_device_exit_net() is called. When[EOL]netvsc NIC is moved back and registered to the default namespace, it[EOL]automatically brings VF NIC back to the default namespace. This will cause[EOL]the default_device_exit_net() >> for_each_netdev_safe loop unable to detect[EOL]the list end, and hit NULL ptr:[EOL][EOL][  231.449420] mana 7870:00:00.0 enP30832s1: Moved VF to namespace with: eth0[EOL][  231.449656] BUG: kernel NULL pointer dereference, address: 0000000000000010[EOL][  231.450246] #PF: supervisor read access in kernel mode[EOL][  231.450579] #PF: error_code(0x0000) - not-present page[EOL][  231.450916] PGD 17b8a8067 P4D 0[EOL][  231.451163] Oops: Oops: 0000 [#1] SMP NOPTI[EOL][  231.451450] CPU: 82 UID: 0 PID: 1394 Comm: kworker/u768:1 Not tainted 6.16.0-rc4+ #3 VOLUNTARY[EOL][  231.452042] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/21/2024[EOL][  231.452692] Workqueue: netns cleanup_net[EOL][  231.452947] RIP: 0010:default_device_exit_batch+0x16c/0x3f0[EOL][  231.453326] Code: c0 0c f5 b3 e8 d5 db fe ff 48 85 c0 74 15 48 c7 c2 f8 fd ca b2 be 10 00 00 00 48 8d 7d c0 e8 7b 77 25 00 49 8b 86 28 01 00 00 <48> 8b 50 10 4c 8b 2a 4c 8d 62 f0 49 83 ed 10 4c 39 e0 0f 84 d6 00[EOL][  231.454294] RSP: 0018:ff75fc7c9bf9fd00 EFLAGS: 00010246[EOL][  231.454610] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 61c8864680b583eb[EOL][  231.455094] RDX: ff1fa9f71462d800 RSI: ff75fc7c9bf9fd38 RDI: 0000000030766564[EOL][  231.455686] RBP: ff75fc7c9bf9fd78 R08: 0000000000000000 R09: 0000000000000000[EOL][  231.456126] R10: 0000000000000001 R11: 0000000000000004 R12: ff1fa9f70088e340[EOL][  231.456621] R13: ff1fa9f70088e340 R14: ffffffffb3f50c20 R15: ff1fa9f7103e6340[EOL][  231.457161] FS:  0000000000000000(0000) GS:ff1faa6783a08000(0000) knlGS:0000000000000000[EOL][  231.457707] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033[EOL][  231.458031] CR2: 0000000000000010 CR3: 0000000179ab2006 CR4: 0000000000b73ef0[EOL][  231.458434] Call Trace:[EOL][  231.458600]  <TASK>[EOL][  231.458777]  ops_undo_list+0x100/0x220[EOL][  231.459015]  cleanup_net+0x1b8/0x300[EOL][  231.459285]  process_one_work+0x184/0x340[EOL][EOL]To fix it, move the ns change to a workqueue, and take rtnl_lock to avoid[EOL]changing the netdev list when default_device_exit_net() is using it.

CREATE(Triage):(User=admin) [CVE-2025-38683 (https://nvd.nist.gov/vuln/detail/CVE-2025-38683)