[ 10.415929][ T66] ================================================================== [ 10.416159][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.416350][ T66] Read of size 8 at addr ffff888009d900f8 by task kworker/u16:1/66 [ 10.416544][ T66] [ 10.416609][ T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 10.416794][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.416959][ T66] Workqueue: netns cleanup_net [ 10.417104][ T66] Call Trace: [ 10.417203][ T66] [ 10.417269][ T66] dump_stack_lvl+0x82/0xd0 [ 10.417401][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 10.417558][ T66] ? cleanup_net+0x932/0xa40 [ 10.417686][ T66] print_report+0xb4/0x270 [ 10.417812][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 10.417936][ T66] kasan_report+0xbd/0xf0 [ 10.418030][ T66] ? cleanup_net+0x932/0xa40 [ 10.418159][ T66] cleanup_net+0x932/0xa40 [ 10.418284][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.418410][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 10.418552][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 10.418677][ T66] ? lock_acquire+0x32/0xc0 [ 10.418799][ T66] ? process_one_work+0xe0b/0x16d0 [ 10.418923][ T66] process_one_work+0xe55/0x16d0 [ 10.419049][ T66] ? __pfx___lock_release+0x10/0x10 [ 10.419177][ T66] ? __pfx_process_one_work+0x10/0x10 [ 10.419322][ T66] ? assign_work+0x16c/0x240 [ 10.419444][ T66] worker_thread+0x58c/0xce0 [ 10.419566][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.419724][ T66] ? __pfx_worker_thread+0x10/0x10 [ 10.419845][ T66] ? __pfx_worker_thread+0x10/0x10 [ 10.419967][ T66] kthread+0x28a/0x350 [ 10.420062][ T66] ? __pfx_kthread+0x10/0x10 [ 10.420191][ T66] ret_from_fork+0x31/0x70 [ 10.420314][ T66] ? __pfx_kthread+0x10/0x10 [ 10.420436][ T66] ret_from_fork_asm+0x1a/0x30 [ 10.420566][ T66] [ 10.420660][ T66] [ 10.420724][ T66] Allocated by task 226: [ 10.420816][ T66] kasan_save_stack+0x24/0x50 [ 10.420946][ T66] kasan_save_track+0x14/0x30 [ 10.421068][ T66] __kasan_slab_alloc+0x59/0x70 [ 10.421194][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.421320][ T66] copy_net_ns+0xc6/0x340 [ 10.421414][ T66] create_new_namespaces+0x35f/0x920 [ 10.421539][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.421667][ T66] ksys_unshare+0x2a9/0x660 [ 10.421789][ T66] __x64_sys_unshare+0x31/0x40 [ 10.421912][ T66] do_syscall_64+0xc1/0x1d0 [ 10.422043][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.422202][ T66] [ 10.422264][ T66] Freed by task 66: [ 10.422357][ T66] kasan_save_stack+0x24/0x50 [ 10.422480][ T66] kasan_save_track+0x14/0x30 [ 10.422602][ T66] kasan_save_free_info+0x3b/0x60 [ 10.422727][ T66] __kasan_slab_free+0x38/0x50 [ 10.422857][ T66] kmem_cache_free+0xf8/0x330 [ 10.422991][ T66] cleanup_net+0x5a8/0xa40 [ 10.423126][ T66] process_one_work+0xe55/0x16d0 [ 10.423260][ T66] worker_thread+0x58c/0xce0 [ 10.423395][ T66] kthread+0x28a/0x350 [ 10.423496][ T66] ret_from_fork+0x31/0x70 [ 10.423625][ T66] ret_from_fork_asm+0x1a/0x30 [ 10.423760][ T66] [ 10.423829][ T66] The buggy address belongs to the object at ffff888009d90040 [ 10.423829][ T66] which belongs to the cache net_namespace of size 5696 [ 10.424189][ T66] The buggy address is located 184 bytes inside of [ 10.424189][ T66] freed 5696-byte region [ffff888009d90040, ffff888009d91680) [ 10.424516][ T66] [ 10.424585][ T66] The buggy address belongs to the physical page: [ 10.424754][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009d92fc0 pfn:0x9d90 [ 10.425031][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.425252][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.425425][ T66] page_type: f5(slab) [ 10.425541][ T66] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.425778][ T66] raw: ffff888009d92fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.426018][ T66] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.426258][ T66] head: ffff888009d92fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.426496][ T66] head: 0080000000000003 ffffea0000276401 ffffffffffffffff 0000000000000000 [ 10.426731][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.426969][ T66] page dumped because: kasan: bad access detected [ 10.427143][ T66] [ 10.427211][ T66] Memory state around the buggy address: [ 10.427342][ T66] ffff888009d8ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.427541][ T66] ffff888009d90000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.427736][ T66] >ffff888009d90080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.427936][ T66] ^ [ 10.428133][ T66] ffff888009d90100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.428327][ T66] ffff888009d90180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.428534][ T66] ================================================================== [ 10.428769][ T66] Disabling lock debugging due to kernel taint [ 14.836510][ C0] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK