[ 11.221781][ T11] ================================================================== [ 11.222036][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 11.222256][ T11] Read of size 8 at addr ffff8880093880f8 by task kworker/u16:0/11 [ 11.222443][ T11] [ 11.222509][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.222701][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.222876][ T11] Workqueue: netns cleanup_net [ 11.223008][ T11] Call Trace: [ 11.223107][ T11] [ 11.223175][ T11] dump_stack_lvl+0x82/0xd0 [ 11.223314][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.223479][ T11] ? cleanup_net+0x932/0xa40 [ 11.223610][ T11] print_report+0xb4/0x270 [ 11.223736][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.223865][ T11] kasan_report+0xbd/0xf0 [ 11.223966][ T11] ? cleanup_net+0x932/0xa40 [ 11.224092][ T11] cleanup_net+0x932/0xa40 [ 11.224226][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.224364][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.224494][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.224632][ T11] ? lock_acquire+0x32/0xc0 [ 11.224756][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.224882][ T11] process_one_work+0xe55/0x16d0 [ 11.225022][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.225160][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.225311][ T11] ? assign_work+0x16c/0x240 [ 11.225442][ T11] worker_thread+0x58c/0xce0 [ 11.225571][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.225696][ T11] kthread+0x28a/0x350 [ 11.225795][ T11] ? __pfx_kthread+0x10/0x10 [ 11.225924][ T11] ret_from_fork+0x31/0x70 [ 11.226052][ T11] ? __pfx_kthread+0x10/0x10 [ 11.226180][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.226312][ T11] [ 11.226414][ T11] [ 11.226485][ T11] Allocated by task 226: [ 11.226587][ T11] kasan_save_stack+0x24/0x50 [ 11.226727][ T11] kasan_save_track+0x14/0x30 [ 11.226862][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.227002][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.227144][ T11] copy_net_ns+0xc6/0x340 [ 11.227247][ T11] create_new_namespaces+0x35f/0x920 [ 11.227394][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 11.227541][ T11] ksys_unshare+0x2a9/0x660 [ 11.227682][ T11] __x64_sys_unshare+0x31/0x40 [ 11.227823][ T11] do_syscall_64+0xc1/0x1d0 [ 11.227972][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.228156][ T11] [ 11.228228][ T11] Freed by task 11: [ 11.228335][ T11] kasan_save_stack+0x24/0x50 [ 11.228483][ T11] kasan_save_track+0x14/0x30 [ 11.228626][ T11] kasan_save_free_info+0x3b/0x60 [ 11.228766][ T11] __kasan_slab_free+0x38/0x50 [ 11.228910][ T11] kmem_cache_free+0xf8/0x330 [ 11.229052][ T11] cleanup_net+0x5a8/0xa40 [ 11.229192][ T11] process_one_work+0xe55/0x16d0 [ 11.229332][ T11] worker_thread+0x58c/0xce0 [ 11.229470][ T11] kthread+0x28a/0x350 [ 11.229577][ T11] ret_from_fork+0x31/0x70 [ 11.229715][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.229859][ T11] [ 11.229932][ T11] The buggy address belongs to the object at ffff888009388040 [ 11.229932][ T11] which belongs to the cache net_namespace of size 5696 [ 11.230294][ T11] The buggy address is located 184 bytes inside of [ 11.230294][ T11] freed 5696-byte region [ffff888009388040, ffff888009389680) [ 11.230640][ T11] [ 11.230711][ T11] The buggy address belongs to the physical page: [ 11.230884][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800938afc0 pfn:0x9388 [ 11.231170][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.231384][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.231573][ T11] page_type: f5(slab) [ 11.231686][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.231936][ T11] raw: ffff88800938afc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.232185][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.232427][ T11] head: ffff88800938afc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.232675][ T11] head: 0080000000000003 ffffea000024e201 ffffffffffffffff 0000000000000000 [ 11.232921][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.233166][ T11] page dumped because: kasan: bad access detected [ 11.233335][ T11] [ 11.233407][ T11] Memory state around the buggy address: [ 11.233542][ T11] ffff888009387f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.233754][ T11] ffff888009388000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.233951][ T11] >ffff888009388080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.234153][ T11] ^ [ 11.234354][ T11] ffff888009388100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.234555][ T11] ffff888009388180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.234761][ T11] ================================================================== [ 11.234976][ T11] Disabling lock debugging due to kernel taint