[ 18.010319][ T11] ================================================================== [ 18.010577][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 18.010818][ T11] Read of size 8 at addr ffff888004e000f8 by task kworker/u16:0/11 [ 18.011018][ T11] [ 18.011090][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.011282][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.011463][ T11] Workqueue: netns cleanup_net [ 18.011613][ T11] Call Trace: [ 18.011730][ T11] [ 18.011813][ T11] dump_stack_lvl+0x82/0xd0 [ 18.011972][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.012150][ T11] ? cleanup_net+0x932/0xa40 [ 18.012292][ T11] print_report+0xb4/0x270 [ 18.012451][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.012598][ T11] kasan_report+0xbd/0xf0 [ 18.012702][ T11] ? cleanup_net+0x932/0xa40 [ 18.012855][ T11] cleanup_net+0x932/0xa40 [ 18.012991][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.013137][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.013273][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.013432][ T11] ? lock_acquire+0x32/0xc0 [ 18.013582][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.013725][ T11] process_one_work+0xe55/0x16d0 [ 18.013883][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.014027][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.014167][ T11] ? assign_work+0x16c/0x240 [ 18.014305][ T11] worker_thread+0x58c/0xce0 [ 18.014473][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.014622][ T11] kthread+0x28a/0x350 [ 18.014728][ T11] ? __pfx_kthread+0x10/0x10 [ 18.014899][ T11] ret_from_fork+0x31/0x70 [ 18.015079][ T11] ? __pfx_kthread+0x10/0x10 [ 18.015216][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.015377][ T11] [ 18.015496][ T11] [ 18.015574][ T11] Allocated by task 224: [ 18.015682][ T11] kasan_save_stack+0x24/0x50 [ 18.015836][ T11] kasan_save_track+0x14/0x30 [ 18.015977][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.016112][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.016258][ T11] copy_net_ns+0xc6/0x340 [ 18.016374][ T11] create_new_namespaces+0x35f/0x920 [ 18.016522][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 18.016654][ T11] ksys_unshare+0x2a9/0x660 [ 18.016799][ T11] __x64_sys_unshare+0x31/0x40 [ 18.016953][ T11] do_syscall_64+0xc1/0x1d0 [ 18.017094][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.017271][ T11] [ 18.017339][ T11] Freed by task 11: [ 18.017470][ T11] kasan_save_stack+0x24/0x50 [ 18.017625][ T11] kasan_save_track+0x14/0x30 [ 18.017768][ T11] kasan_save_free_info+0x3b/0x60 [ 18.017907][ T11] __kasan_slab_free+0x38/0x50 [ 18.018061][ T11] kmem_cache_free+0xf8/0x330 [ 18.018202][ T11] cleanup_net+0x5a8/0xa40 [ 18.018342][ T11] process_one_work+0xe55/0x16d0 [ 18.018535][ T11] worker_thread+0x58c/0xce0 [ 18.018725][ T11] kthread+0x28a/0x350 [ 18.018849][ T11] ret_from_fork+0x31/0x70 [ 18.018983][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.019112][ T11] [ 18.019193][ T11] Last potentially related work creation: [ 18.019336][ T11] kasan_save_stack+0x24/0x50 [ 18.019473][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.019605][ T11] insert_work+0x34/0x230 [ 18.019709][ T11] __queue_work+0x5fd/0xa40 [ 18.019876][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.020025][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.020153][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 18.020277][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.020416][ T11] netlink_rcv_skb+0x130/0x360 [ 18.020545][ T11] netlink_unicast+0x44b/0x710 [ 18.020674][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.020803][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.020938][ T11] ___sys_sendmsg+0xee/0x170 [ 18.021068][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.021201][ T11] do_syscall_64+0xc1/0x1d0 [ 18.021334][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.021526][ T11] [ 18.021594][ T11] The buggy address belongs to the object at ffff888004e00040 [ 18.021594][ T11] which belongs to the cache net_namespace of size 5696 [ 18.021948][ T11] The buggy address is located 184 bytes inside of [ 18.021948][ T11] freed 5696-byte region [ffff888004e00040, ffff888004e01680) [ 18.022343][ T11] [ 18.022414][ T11] The buggy address belongs to the physical page: [ 18.022572][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004e02fc0 pfn:0x4e00 [ 18.022842][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.023062][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.023234][ T11] page_type: f5(slab) [ 18.023341][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.023593][ T11] raw: ffff888004e02fc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.023848][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.024094][ T11] head: ffff888004e02fc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.024346][ T11] head: 0080000000000003 ffffea0000138001 ffffffffffffffff 0000000000000000 [ 18.024599][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.024877][ T11] page dumped because: kasan: bad access detected [ 18.025042][ T11] [ 18.025113][ T11] Memory state around the buggy address: [ 18.025243][ T11] ffff888004dfff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.025448][ T11] ffff888004e00000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.025671][ T11] >ffff888004e00080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.025867][ T11] ^ [ 18.026060][ T11] ffff888004e00100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.026243][ T11] ffff888004e00180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.026439][ T11] ================================================================== [ 18.026656][ T11] Disabling lock debugging due to kernel taint