[ 11.480364][ T11] ================================================================== [ 11.480672][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 11.480917][ T11] Read of size 8 at addr ffff888008fc80f8 by task kworker/u16:0/11 [ 11.481148][ T11] [ 11.481245][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.481522][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.481751][ T11] Workqueue: netns cleanup_net [ 11.481975][ T11] Call Trace: [ 11.482127][ T11] [ 11.482240][ T11] dump_stack_lvl+0x82/0xd0 [ 11.482456][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.482728][ T11] ? cleanup_net+0x932/0xa40 [ 11.482913][ T11] print_report+0xb4/0x270 [ 11.483088][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.483228][ T11] kasan_report+0xbd/0xf0 [ 11.483336][ T11] ? cleanup_net+0x932/0xa40 [ 11.483481][ T11] cleanup_net+0x932/0xa40 [ 11.483639][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.483789][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.483941][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.484123][ T11] ? lock_acquire+0x32/0xc0 [ 11.484265][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.484406][ T11] process_one_work+0xe55/0x16d0 [ 11.484556][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.484687][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.484823][ T11] ? assign_work+0x16c/0x240 [ 11.484955][ T11] worker_thread+0x58c/0xce0 [ 11.485087][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.485212][ T11] kthread+0x28a/0x350 [ 11.485331][ T11] ? __pfx_kthread+0x10/0x10 [ 11.485470][ T11] ret_from_fork+0x31/0x70 [ 11.485599][ T11] ? __pfx_kthread+0x10/0x10 [ 11.485725][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.485902][ T11] [ 11.486018][ T11] [ 11.486095][ T11] Allocated by task 227: [ 11.486189][ T11] kasan_save_stack+0x24/0x50 [ 11.486319][ T11] kasan_save_track+0x14/0x30 [ 11.486446][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.486571][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.486700][ T11] copy_net_ns+0xc6/0x340 [ 11.486798][ T11] create_new_namespaces+0x35f/0x920 [ 11.486931][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 11.487064][ T11] ksys_unshare+0x2a9/0x660 [ 11.487205][ T11] __x64_sys_unshare+0x31/0x40 [ 11.487332][ T11] do_syscall_64+0xc1/0x1d0 [ 11.487476][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.487633][ T11] [ 11.487698][ T11] Freed by task 11: [ 11.487797][ T11] kasan_save_stack+0x24/0x50 [ 11.487929][ T11] kasan_save_track+0x14/0x30 [ 11.488056][ T11] kasan_save_free_info+0x3b/0x60 [ 11.488194][ T11] __kasan_slab_free+0x38/0x50 [ 11.488318][ T11] kmem_cache_free+0xf8/0x330 [ 11.488441][ T11] cleanup_net+0x5a8/0xa40 [ 11.488579][ T11] process_one_work+0xe55/0x16d0 [ 11.488722][ T11] worker_thread+0x58c/0xce0 [ 11.488860][ T11] kthread+0x28a/0x350 [ 11.488960][ T11] ret_from_fork+0x31/0x70 [ 11.489090][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.489223][ T11] [ 11.489291][ T11] The buggy address belongs to the object at ffff888008fc8040 [ 11.489291][ T11] which belongs to the cache net_namespace of size 5696 [ 11.489642][ T11] The buggy address is located 184 bytes inside of [ 11.489642][ T11] freed 5696-byte region [ffff888008fc8040, ffff888008fc9680) [ 11.489975][ T11] [ 11.490063][ T11] The buggy address belongs to the physical page: [ 11.490213][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888008fcafc0 pfn:0x8fc8 [ 11.490466][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.490656][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.490827][ T11] page_type: f5(slab) [ 11.490925][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.491165][ T11] raw: ffff888008fcafc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.491398][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.491624][ T11] head: ffff888008fcafc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.491848][ T11] head: 0080000000000003 ffffea000023f201 ffffffffffffffff 0000000000000000 [ 11.492072][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.492301][ T11] page dumped because: kasan: bad access detected [ 11.492465][ T11] [ 11.492529][ T11] Memory state around the buggy address: [ 11.492662][ T11] ffff888008fc7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.492849][ T11] ffff888008fc8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.493057][ T11] >ffff888008fc8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.493267][ T11] ^ [ 11.493460][ T11] ffff888008fc8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.493651][ T11] ffff888008fc8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.493843][ T11] ================================================================== [ 11.494084][ T11] Disabling lock debugging due to kernel taint [ 15.879889][ C0] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK