[ 10.268448][ T67] ================================================================== [ 10.268666][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.268859][ T67] Read of size 8 at addr ffff88800ad500f8 by task kworker/u16:1/67 [ 10.269039][ T67] [ 10.269105][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 10.269294][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.269456][ T67] Workqueue: netns cleanup_net [ 10.269586][ T67] Call Trace: [ 10.269679][ T67] [ 10.269746][ T67] dump_stack_lvl+0x82/0xd0 [ 10.269877][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 10.270034][ T67] ? cleanup_net+0x932/0xa40 [ 10.270162][ T67] print_report+0xb4/0x270 [ 10.270290][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 10.270416][ T67] kasan_report+0xbd/0xf0 [ 10.270512][ T67] ? cleanup_net+0x932/0xa40 [ 10.270639][ T67] cleanup_net+0x932/0xa40 [ 10.270766][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.270893][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 10.271017][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 10.271142][ T67] ? lock_acquire+0x32/0xc0 [ 10.271264][ T67] ? process_one_work+0xe0b/0x16d0 [ 10.271396][ T67] process_one_work+0xe55/0x16d0 [ 10.271524][ T67] ? __pfx___lock_release+0x10/0x10 [ 10.271657][ T67] ? __pfx_process_one_work+0x10/0x10 [ 10.271786][ T67] ? assign_work+0x16c/0x240 [ 10.271911][ T67] worker_thread+0x58c/0xce0 [ 10.272035][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.272193][ T67] ? __pfx_worker_thread+0x10/0x10 [ 10.272317][ T67] ? __pfx_worker_thread+0x10/0x10 [ 10.272441][ T67] kthread+0x28a/0x350 [ 10.272538][ T67] ? __pfx_kthread+0x10/0x10 [ 10.272663][ T67] ret_from_fork+0x31/0x70 [ 10.272787][ T67] ? __pfx_kthread+0x10/0x10 [ 10.272911][ T67] ret_from_fork_asm+0x1a/0x30 [ 10.273044][ T67] [ 10.273140][ T67] [ 10.273205][ T67] Allocated by task 226: [ 10.273299][ T67] kasan_save_stack+0x24/0x50 [ 10.273430][ T67] kasan_save_track+0x14/0x30 [ 10.273591][ T67] __kasan_slab_alloc+0x59/0x70 [ 10.273714][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.273840][ T67] copy_net_ns+0xc6/0x340 [ 10.273943][ T67] create_new_namespaces+0x35f/0x920 [ 10.274068][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.274191][ T67] ksys_unshare+0x2a9/0x660 [ 10.274347][ T67] __x64_sys_unshare+0x31/0x40 [ 10.274484][ T67] do_syscall_64+0xc1/0x1d0 [ 10.274623][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.274778][ T67] [ 10.274851][ T67] Freed by task 67: [ 10.274954][ T67] kasan_save_stack+0x24/0x50 [ 10.275092][ T67] kasan_save_track+0x14/0x30 [ 10.275223][ T67] kasan_save_free_info+0x3b/0x60 [ 10.275357][ T67] __kasan_slab_free+0x38/0x50 [ 10.275487][ T67] kmem_cache_free+0xf8/0x330 [ 10.275616][ T67] cleanup_net+0x5a8/0xa40 [ 10.275755][ T67] process_one_work+0xe55/0x16d0 [ 10.275878][ T67] worker_thread+0x58c/0xce0 [ 10.276003][ T67] kthread+0x28a/0x350 [ 10.276097][ T67] ret_from_fork+0x31/0x70 [ 10.276221][ T67] ret_from_fork_asm+0x1a/0x30 [ 10.276344][ T67] [ 10.276408][ T67] The buggy address belongs to the object at ffff88800ad50040 [ 10.276408][ T67] which belongs to the cache net_namespace of size 5696 [ 10.276750][ T67] The buggy address is located 184 bytes inside of [ 10.276750][ T67] freed 5696-byte region [ffff88800ad50040, ffff88800ad51680) [ 10.277062][ T67] [ 10.277134][ T67] The buggy address belongs to the physical page: [ 10.277289][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ad52fc0 pfn:0xad50 [ 10.277563][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.277749][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.277908][ T67] page_type: f5(slab) [ 10.278007][ T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.278229][ T67] raw: ffff88800ad52fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.278444][ T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.278665][ T67] head: ffff88800ad52fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.278878][ T67] head: 0080000000000003 ffffea00002b5401 ffffffffffffffff 0000000000000000 [ 10.279097][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.279312][ T67] page dumped because: kasan: bad access detected [ 10.279464][ T67] [ 10.279530][ T67] Memory state around the buggy address: [ 10.279653][ T67] ffff88800ad4ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.279850][ T67] ffff88800ad50000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.280030][ T67] >ffff88800ad50080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.280208][ T67] ^ [ 10.280386][ T67] ffff88800ad50100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.280571][ T67] ffff88800ad50180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.280760][ T67] ================================================================== [ 10.281056][ T67] Disabling lock debugging due to kernel taint [ 12.200641][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.201455][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.202205][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.202951][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.203655][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.322029][ T226] key-management_ (226) used greatest stack depth: 23968 bytes left