[ 11.037574][ T11] ================================================================== [ 11.037852][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 11.038072][ T11] Read of size 8 at addr ffff888010c780f8 by task kworker/u16:0/11 [ 11.038281][ T11] [ 11.038355][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.038576][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.038752][ T11] Workqueue: netns cleanup_net [ 11.038905][ T11] Call Trace: [ 11.039014][ T11] [ 11.039096][ T11] dump_stack_lvl+0x82/0xd0 [ 11.039267][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.039452][ T11] ? cleanup_net+0x932/0xa40 [ 11.039631][ T11] print_report+0xb4/0x270 [ 11.039773][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.039917][ T11] kasan_report+0xbd/0xf0 [ 11.040023][ T11] ? cleanup_net+0x932/0xa40 [ 11.040167][ T11] cleanup_net+0x932/0xa40 [ 11.040303][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.040445][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.040590][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.040734][ T11] ? lock_acquire+0x32/0xc0 [ 11.040872][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.041018][ T11] process_one_work+0xe55/0x16d0 [ 11.041171][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.041318][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.041461][ T11] ? assign_work+0x16c/0x240 [ 11.041606][ T11] worker_thread+0x58c/0xce0 [ 11.041757][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.041894][ T11] kthread+0x28a/0x350 [ 11.042005][ T11] ? __pfx_kthread+0x10/0x10 [ 11.042155][ T11] ret_from_fork+0x31/0x70 [ 11.042298][ T11] ? __pfx_kthread+0x10/0x10 [ 11.042455][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.042614][ T11] [ 11.042718][ T11] [ 11.042813][ T11] Allocated by task 226: [ 11.042921][ T11] kasan_save_stack+0x24/0x50 [ 11.043088][ T11] kasan_save_track+0x14/0x30 [ 11.043229][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.043389][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.043546][ T11] copy_net_ns+0xc6/0x340 [ 11.043654][ T11] create_new_namespaces+0x35f/0x920 [ 11.043807][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 11.043954][ T11] ksys_unshare+0x2a9/0x660 [ 11.044112][ T11] __x64_sys_unshare+0x31/0x40 [ 11.044254][ T11] do_syscall_64+0xc1/0x1d0 [ 11.044397][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.044605][ T11] [ 11.044686][ T11] Freed by task 11: [ 11.044799][ T11] kasan_save_stack+0x24/0x50 [ 11.044957][ T11] kasan_save_track+0x14/0x30 [ 11.045097][ T11] kasan_save_free_info+0x3b/0x60 [ 11.045258][ T11] __kasan_slab_free+0x38/0x50 [ 11.045406][ T11] kmem_cache_free+0xf8/0x330 [ 11.045589][ T11] cleanup_net+0x5a8/0xa40 [ 11.045756][ T11] process_one_work+0xe55/0x16d0 [ 11.045905][ T11] worker_thread+0x58c/0xce0 [ 11.046042][ T11] kthread+0x28a/0x350 [ 11.046167][ T11] ret_from_fork+0x31/0x70 [ 11.046313][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.046478][ T11] [ 11.046552][ T11] The buggy address belongs to the object at ffff888010c78040 [ 11.046552][ T11] which belongs to the cache net_namespace of size 5696 [ 11.046932][ T11] The buggy address is located 184 bytes inside of [ 11.046932][ T11] freed 5696-byte region [ffff888010c78040, ffff888010c79680) [ 11.047278][ T11] [ 11.047367][ T11] The buggy address belongs to the physical page: [ 11.047534][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888010c7afc0 pfn:0x10c78 [ 11.047842][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.048076][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.048253][ T11] page_type: f5(slab) [ 11.048363][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.048609][ T11] raw: ffff888010c7afc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.048858][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.049101][ T11] head: ffff888010c7afc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.049339][ T11] head: 0080000000000003 ffffea0000431e01 ffffffffffffffff 0000000000000000 [ 11.049592][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.049840][ T11] page dumped because: kasan: bad access detected [ 11.050017][ T11] [ 11.050087][ T11] Memory state around the buggy address: [ 11.050230][ T11] ffff888010c77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.050453][ T11] ffff888010c78000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.050657][ T11] >ffff888010c78080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.050873][ T11] ^ [ 11.051099][ T11] ffff888010c78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.051300][ T11] ffff888010c78180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.051505][ T11] ================================================================== [ 11.051803][ T11] Disabling lock debugging due to kernel taint