[ 9.132088][ T11] ================================================================== [ 9.132375][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 9.132563][ T11] Read of size 8 at addr ffff88800cc180f8 by task kworker/u16:0/11 [ 9.132744][ T11] [ 9.132808][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 9.132997][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 9.133151][ T11] Workqueue: netns cleanup_net [ 9.133285][ T11] Call Trace: [ 9.133381][ T11] [ 9.133448][ T11] dump_stack_lvl+0x82/0xd0 [ 9.133578][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 9.133736][ T11] ? cleanup_net+0xa5d/0xb90 [ 9.133864][ T11] print_report+0xb4/0x270 [ 9.133987][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 9.134111][ T11] kasan_report+0xbd/0xf0 [ 9.134208][ T11] ? cleanup_net+0xa5d/0xb90 [ 9.134341][ T11] cleanup_net+0xa5d/0xb90 [ 9.134464][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 9.134591][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 9.134718][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 9.134844][ T11] ? lock_acquire+0x32/0xc0 [ 9.134969][ T11] ? process_one_work+0xe0b/0x16d0 [ 9.135096][ T11] process_one_work+0xe55/0x16d0 [ 9.135221][ T11] ? __pfx___lock_release+0x10/0x10 [ 9.135347][ T11] ? __pfx_process_one_work+0x10/0x10 [ 9.135472][ T11] ? assign_work+0x16c/0x240 [ 9.135600][ T11] worker_thread+0x58c/0xce0 [ 9.135727][ T11] ? __pfx_worker_thread+0x10/0x10 [ 9.135851][ T11] kthread+0x28a/0x350 [ 9.135948][ T11] ? __pfx_kthread+0x10/0x10 [ 9.136073][ T11] ret_from_fork+0x31/0x70 [ 9.136197][ T11] ? __pfx_kthread+0x10/0x10 [ 9.136322][ T11] ret_from_fork_asm+0x1a/0x30 [ 9.136452][ T11] [ 9.136546][ T11] [ 9.136612][ T11] Allocated by task 230: [ 9.136705][ T11] kasan_save_stack+0x24/0x50 [ 9.136831][ T11] kasan_save_track+0x14/0x30 [ 9.136953][ T11] __kasan_slab_alloc+0x59/0x70 [ 9.137073][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 9.137197][ T11] copy_net_ns+0xc6/0x540 [ 9.137299][ T11] create_new_namespaces+0x35f/0x920 [ 9.137425][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 9.137549][ T11] ksys_unshare+0x2c4/0x6e0 [ 9.137677][ T11] __x64_sys_unshare+0x31/0x40 [ 9.137802][ T11] do_syscall_64+0xc1/0x1d0 [ 9.137928][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 9.138084][ T11] [ 9.138146][ T11] Freed by task 11: [ 9.138240][ T11] kasan_save_stack+0x24/0x50 [ 9.138365][ T11] kasan_save_track+0x14/0x30 [ 9.138488][ T11] kasan_save_free_info+0x3b/0x60 [ 9.138613][ T11] __kasan_slab_free+0x38/0x50 [ 9.138735][ T11] kmem_cache_free+0xf8/0x330 [ 9.138858][ T11] cleanup_net+0x5a8/0xb90 [ 9.138980][ T11] process_one_work+0xe55/0x16d0 [ 9.139105][ T11] worker_thread+0x58c/0xce0 [ 9.139228][ T11] kthread+0x28a/0x350 [ 9.139324][ T11] ret_from_fork+0x31/0x70 [ 9.139447][ T11] ret_from_fork_asm+0x1a/0x30 [ 9.139571][ T11] [ 9.139635][ T11] The buggy address belongs to the object at ffff88800cc18040 [ 9.139635][ T11] which belongs to the cache net_namespace of size 6528 [ 9.139961][ T11] The buggy address is located 184 bytes inside of [ 9.139961][ T11] freed 6528-byte region [ffff88800cc18040, ffff88800cc199c0) [ 9.140256][ T11] [ 9.140319][ T11] The buggy address belongs to the physical page: [ 9.140468][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc18 [ 9.140695][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 9.140885][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 9.141043][ T11] page_type: f5(slab) [ 9.141141][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 9.141362][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 9.141580][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 9.141804][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 9.142020][ T11] head: 0080000000000003 ffffea0000330601 ffffffffffffffff 0000000000000000 [ 9.142236][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 9.142453][ T11] page dumped because: kasan: bad access detected [ 9.142609][ T11] [ 9.142672][ T11] Memory state around the buggy address: [ 9.142795][ T11] ffff88800cc17f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 9.142980][ T11] ffff88800cc18000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 9.143155][ T11] >ffff88800cc18080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 9.143333][ T11] ^ [ 9.143511][ T11] ffff88800cc18100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 9.143691][ T11] ffff88800cc18180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 9.143870][ T11] ================================================================== [ 9.144067][ T11] Disabling lock debugging due to kernel taint