[ 14.019049][ T11] ================================================================== [ 14.019345][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.019545][ T11] Read of size 8 at addr ffff888002199bf8 by task kworker/u16:0/11 [ 14.019737][ T11] [ 14.019805][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 14.020009][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.020174][ T11] Workqueue: netns cleanup_net [ 14.020311][ T11] Call Trace: [ 14.020413][ T11] [ 14.020484][ T11] dump_stack_lvl+0x82/0xd0 [ 14.020617][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 14.020779][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.020910][ T11] print_report+0xb4/0x270 [ 14.021035][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 14.021163][ T11] kasan_report+0xbd/0xf0 [ 14.021264][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.021395][ T11] cleanup_net+0xa5d/0xb90 [ 14.021522][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.021652][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 14.021779][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 14.021913][ T11] ? lock_acquire+0x32/0xc0 [ 14.022041][ T11] ? process_one_work+0xe0b/0x16d0 [ 14.022173][ T11] process_one_work+0xe55/0x16d0 [ 14.022307][ T11] ? __pfx___lock_release+0x10/0x10 [ 14.022437][ T11] ? __pfx_process_one_work+0x10/0x10 [ 14.022572][ T11] ? assign_work+0x16c/0x240 [ 14.022703][ T11] worker_thread+0x58c/0xce0 [ 14.022836][ T11] ? __pfx_worker_thread+0x10/0x10 [ 14.022965][ T11] kthread+0x28a/0x350 [ 14.023063][ T11] ? __pfx_kthread+0x10/0x10 [ 14.023190][ T11] ret_from_fork+0x31/0x70 [ 14.023322][ T11] ? __pfx_kthread+0x10/0x10 [ 14.023451][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.023585][ T11] [ 14.023682][ T11] [ 14.023748][ T11] Allocated by task 256: [ 14.023847][ T11] kasan_save_stack+0x24/0x50 [ 14.023977][ T11] kasan_save_track+0x14/0x30 [ 14.024104][ T11] __kasan_slab_alloc+0x59/0x70 [ 14.024229][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.024359][ T11] copy_net_ns+0xc6/0x540 [ 14.024456][ T11] create_new_namespaces+0x35f/0x920 [ 14.024585][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.024714][ T11] ksys_unshare+0x2c4/0x6e0 [ 14.024843][ T11] __x64_sys_unshare+0x31/0x40 [ 14.024970][ T11] do_syscall_64+0xc1/0x1d0 [ 14.025098][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.025263][ T11] [ 14.025330][ T11] Freed by task 11: [ 14.025427][ T11] kasan_save_stack+0x24/0x50 [ 14.025554][ T11] kasan_save_track+0x14/0x30 [ 14.025679][ T11] kasan_save_free_info+0x3b/0x60 [ 14.025809][ T11] __kasan_slab_free+0x38/0x50 [ 14.025938][ T11] kmem_cache_free+0xf8/0x330 [ 14.026064][ T11] cleanup_net+0x5a8/0xb90 [ 14.026190][ T11] process_one_work+0xe55/0x16d0 [ 14.026316][ T11] worker_thread+0x58c/0xce0 [ 14.026444][ T11] kthread+0x28a/0x350 [ 14.026540][ T11] ret_from_fork+0x31/0x70 [ 14.026665][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.026794][ T11] [ 14.026858][ T11] Last potentially related work creation: [ 14.026988][ T11] kasan_save_stack+0x24/0x50 [ 14.027120][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.027250][ T11] insert_work+0x34/0x230 [ 14.027349][ T11] __queue_work+0x5fd/0xa40 [ 14.027480][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.027609][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.027738][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 14.027866][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.027998][ T11] netlink_rcv_skb+0x130/0x360 [ 14.028129][ T11] netlink_unicast+0x44b/0x710 [ 14.028258][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.028388][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.028517][ T11] ___sys_sendmsg+0xee/0x170 [ 14.028645][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.028776][ T11] do_syscall_64+0xc1/0x1d0 [ 14.028906][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.029069][ T11] [ 14.029134][ T11] The buggy address belongs to the object at ffff888002199b40 [ 14.029134][ T11] which belongs to the cache net_namespace of size 6528 [ 14.029469][ T11] The buggy address is located 184 bytes inside of [ 14.029469][ T11] freed 6528-byte region [ffff888002199b40, ffff88800219b4c0) [ 14.029777][ T11] [ 14.029841][ T11] The buggy address belongs to the physical page: [ 14.030011][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800219b640 pfn:0x2198 [ 14.030265][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.030459][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.030624][ T11] page_type: f5(slab) [ 14.030729][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.030956][ T11] raw: ffff88800219b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.031181][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.031410][ T11] head: ffff88800219b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.031637][ T11] head: 0080000000000003 ffffea0000086601 ffffffffffffffff 0000000000000000 [ 14.031861][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.032086][ T11] page dumped because: kasan: bad access detected [ 14.032244][ T11] [ 14.032312][ T11] Memory state around the buggy address: [ 14.032440][ T11] ffff888002199a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.032626][ T11] ffff888002199b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.032808][ T11] >ffff888002199b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.032991][ T11] ^ [ 14.033174][ T11] ffff888002199c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.033358][ T11] ffff888002199c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.033542][ T11] ================================================================== [ 14.033741][ T11] Disabling lock debugging due to kernel taint