[ 13.912111][ T225] TCP: tun0: Driver has suspect GRO implementation, TCP performance may be compromised. [ 16.493416][ T65] ================================================================== [ 16.493705][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 16.493926][ T65] Read of size 8 at addr ffff88800a0c80f8 by task kworker/u16:1/65 [ 16.494142][ T65] [ 16.494214][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 16.494430][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.494615][ T65] Workqueue: netns cleanup_net [ 16.494772][ T65] Call Trace: [ 16.494882][ T65] [ 16.494957][ T65] dump_stack_lvl+0x82/0xd0 [ 16.495119][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 16.495302][ T65] ? cleanup_net+0x932/0xa40 [ 16.495447][ T65] print_report+0xb4/0x270 [ 16.495592][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 16.495741][ T65] kasan_report+0xbd/0xf0 [ 16.495850][ T65] ? cleanup_net+0x932/0xa40 [ 16.496001][ T65] cleanup_net+0x932/0xa40 [ 16.496145][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.496298][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 16.496440][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 16.496585][ T65] ? lock_acquire+0x32/0xc0 [ 16.496738][ T65] ? process_one_work+0xe0b/0x16d0 [ 16.496891][ T65] process_one_work+0xe55/0x16d0 [ 16.497038][ T65] ? __pfx___lock_release+0x10/0x10 [ 16.497187][ T65] ? __pfx_process_one_work+0x10/0x10 [ 16.497334][ T65] ? assign_work+0x16c/0x240 [ 16.497483][ T65] worker_thread+0x58c/0xce0 [ 16.497625][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 16.497799][ T65] ? __pfx_worker_thread+0x10/0x10 [ 16.497939][ T65] ? __pfx_worker_thread+0x10/0x10 [ 16.498077][ T65] kthread+0x28a/0x350 [ 16.498191][ T65] ? __pfx_kthread+0x10/0x10 [ 16.498355][ T65] ret_from_fork+0x31/0x70 [ 16.498502][ T65] ? __pfx_kthread+0x10/0x10 [ 16.498643][ T65] ret_from_fork_asm+0x1a/0x30 [ 16.498841][ T65] [ 16.498940][ T65] [ 16.499010][ T65] Allocated by task 225: [ 16.499111][ T65] kasan_save_stack+0x24/0x50 [ 16.499279][ T65] kasan_save_track+0x14/0x30 [ 16.499412][ T65] __kasan_slab_alloc+0x59/0x70 [ 16.499543][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.499704][ T65] copy_net_ns+0xc6/0x340 [ 16.499815][ T65] create_new_namespaces+0x35f/0x920 [ 16.499965][ T65] unshare_nsproxy_namespaces+0x8d/0x130 [ 16.500104][ T65] ksys_unshare+0x2a9/0x660 [ 16.500248][ T65] __x64_sys_unshare+0x31/0x40 [ 16.500393][ T65] do_syscall_64+0xc1/0x1d0 [ 16.500542][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.500734][ T65] [ 16.500807][ T65] Freed by task 65: [ 16.500913][ T65] kasan_save_stack+0x24/0x50 [ 16.501058][ T65] kasan_save_track+0x14/0x30 [ 16.501200][ T65] kasan_save_free_info+0x3b/0x60 [ 16.501345][ T65] __kasan_slab_free+0x38/0x50 [ 16.501505][ T65] kmem_cache_free+0xf8/0x330 [ 16.501664][ T65] cleanup_net+0x5a8/0xa40 [ 16.501803][ T65] process_one_work+0xe55/0x16d0 [ 16.501953][ T65] worker_thread+0x58c/0xce0 [ 16.502110][ T65] kthread+0x28a/0x350 [ 16.502219][ T65] ret_from_fork+0x31/0x70 [ 16.502357][ T65] ret_from_fork_asm+0x1a/0x30 [ 16.502503][ T65] [ 16.502583][ T65] Last potentially related work creation: [ 16.502729][ T65] kasan_save_stack+0x24/0x50 [ 16.502879][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 16.503046][ T65] insert_work+0x34/0x230 [ 16.503159][ T65] __queue_work+0x5fd/0xa40 [ 16.503299][ T65] queue_delayed_work_on+0x8c/0xa0 [ 16.503452][ T65] __inet_insert_ifa+0x751/0xb10 [ 16.503596][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 16.503789][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 16.503944][ T65] netlink_rcv_skb+0x130/0x360 [ 16.504095][ T65] netlink_unicast+0x44b/0x710 [ 16.504236][ T65] netlink_sendmsg+0x723/0xbe0 [ 16.504386][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 16.504531][ T65] ___sys_sendmsg+0xee/0x170 [ 16.504664][ T65] __sys_sendmsg+0x109/0x1a0 [ 16.504791][ T65] do_syscall_64+0xc1/0x1d0 [ 16.504922][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.505142][ T65] [ 16.505218][ T65] The buggy address belongs to the object at ffff88800a0c8040 [ 16.505218][ T65] which belongs to the cache net_namespace of size 5696 [ 16.505597][ T65] The buggy address is located 184 bytes inside of [ 16.505597][ T65] freed 5696-byte region [ffff88800a0c8040, ffff88800a0c9680) [ 16.505951][ T65] [ 16.506023][ T65] The buggy address belongs to the physical page: [ 16.506205][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a0cafc0 pfn:0xa0c8 [ 16.506491][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.506703][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.506882][ T65] page_type: f5(slab) [ 16.506993][ T65] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.507256][ T65] raw: ffff88800a0cafc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.507501][ T65] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.507755][ T65] head: ffff88800a0cafc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.508010][ T65] head: 0080000000000003 ffffea0000283201 ffffffffffffffff 0000000000000000 [ 16.508254][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.508498][ T65] page dumped because: kasan: bad access detected [ 16.508672][ T65] [ 16.508745][ T65] Memory state around the buggy address: [ 16.508896][ T65] ffff88800a0c7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.509111][ T65] ffff88800a0c8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.509320][ T65] >ffff88800a0c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.509537][ T65] ^ [ 16.509752][ T65] ffff88800a0c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.509964][ T65] ffff88800a0c8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.510163][ T65] ================================================================== [ 16.510496][ T65] Disabling lock debugging due to kernel taint