[ 22.529391][ T11] ================================================================== [ 22.529645][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 22.529859][ T11] Read of size 8 at addr ffff8880027b80f8 by task kworker/u16:0/11 [ 22.530069][ T11] [ 22.530157][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 22.530369][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 22.530544][ T11] Workqueue: netns cleanup_net [ 22.530693][ T11] Call Trace: [ 22.530801][ T11] [ 22.530875][ T11] dump_stack_lvl+0x82/0xd0 [ 22.531020][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 22.531199][ T11] ? cleanup_net+0xa5d/0xb90 [ 22.531345][ T11] print_report+0xb4/0x270 [ 22.531486][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 22.531629][ T11] kasan_report+0xbd/0xf0 [ 22.531735][ T11] ? cleanup_net+0xa5d/0xb90 [ 22.531879][ T11] cleanup_net+0xa5d/0xb90 [ 22.532018][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 22.532163][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 22.532304][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 22.532448][ T11] ? lock_acquire+0x32/0xc0 [ 22.532589][ T11] ? process_one_work+0xe0b/0x16d0 [ 22.532731][ T11] process_one_work+0xe55/0x16d0 [ 22.532874][ T11] ? __pfx___lock_release+0x10/0x10 [ 22.533012][ T11] ? __pfx_process_one_work+0x10/0x10 [ 22.533153][ T11] ? assign_work+0x16c/0x240 [ 22.533294][ T11] worker_thread+0x58c/0xce0 [ 22.533437][ T11] ? __pfx_worker_thread+0x10/0x10 [ 22.533687][ T11] kthread+0x28a/0x350 [ 22.533796][ T11] ? __pfx_kthread+0x10/0x10 [ 22.533937][ T11] ret_from_fork+0x31/0x70 [ 22.534079][ T11] ? __pfx_kthread+0x10/0x10 [ 22.534220][ T11] ret_from_fork_asm+0x1a/0x30 [ 22.534365][ T11] [ 22.534472][ T11] [ 22.534543][ T11] Allocated by task 251: [ 22.534652][ T11] kasan_save_stack+0x24/0x50 [ 22.534795][ T11] kasan_save_track+0x14/0x30 [ 22.534943][ T11] __kasan_slab_alloc+0x59/0x70 [ 22.535094][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 22.535238][ T11] copy_net_ns+0xc6/0x540 [ 22.535345][ T11] create_new_namespaces+0x35f/0x920 [ 22.535523][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 22.535668][ T11] ksys_unshare+0x2c4/0x6e0 [ 22.535809][ T11] __x64_sys_unshare+0x31/0x40 [ 22.535949][ T11] do_syscall_64+0xc1/0x1d0 [ 22.536091][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.536268][ T11] [ 22.536339][ T11] Freed by task 11: [ 22.536443][ T11] kasan_save_stack+0x24/0x50 [ 22.536581][ T11] kasan_save_track+0x14/0x30 [ 22.536719][ T11] kasan_save_free_info+0x3b/0x60 [ 22.536865][ T11] __kasan_slab_free+0x38/0x50 [ 22.537004][ T11] kmem_cache_free+0xf8/0x330 [ 22.537147][ T11] cleanup_net+0x5a8/0xb90 [ 22.537284][ T11] process_one_work+0xe55/0x16d0 [ 22.537424][ T11] worker_thread+0x58c/0xce0 [ 22.537564][ T11] kthread+0x28a/0x350 [ 22.537671][ T11] ret_from_fork+0x31/0x70 [ 22.537810][ T11] ret_from_fork_asm+0x1a/0x30 [ 22.537954][ T11] [ 22.538025][ T11] Last potentially related work creation: [ 22.538164][ T11] kasan_save_stack+0x24/0x50 [ 22.538305][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 22.538448][ T11] insert_work+0x34/0x230 [ 22.538556][ T11] __queue_work+0x5fd/0xa40 [ 22.538695][ T11] queue_delayed_work_on+0x8c/0xa0 [ 22.538838][ T11] __inet_insert_ifa+0x751/0xb10 [ 22.538983][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 22.539123][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 22.539266][ T11] netlink_rcv_skb+0x130/0x360 [ 22.539413][ T11] netlink_unicast+0x44b/0x710 [ 22.539555][ T11] netlink_sendmsg+0x723/0xbe0 [ 22.539697][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 22.539848][ T11] ___sys_sendmsg+0xee/0x170 [ 22.539987][ T11] __sys_sendmsg+0x109/0x1a0 [ 22.540129][ T11] do_syscall_64+0xc1/0x1d0 [ 22.540289][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.540461][ T11] [ 22.540535][ T11] Second to last potentially related work creation: [ 22.540709][ T11] kasan_save_stack+0x24/0x50 [ 22.540850][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 22.540993][ T11] insert_work+0x34/0x230 [ 22.541099][ T11] __queue_work+0x5fd/0xa40 [ 22.541240][ T11] queue_delayed_work_on+0x8c/0xa0 [ 22.541381][ T11] __inet_insert_ifa+0x751/0xb10 [ 22.541520][ T11] inetdev_event+0xb18/0xcf0 [ 22.541661][ T11] notifier_call_chain+0xcd/0x150 [ 22.541801][ T11] __dev_notify_flags+0xe6/0x250 [ 22.541947][ T11] dev_change_flags+0xec/0x160 [ 22.542091][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 22.542233][ T11] rtnl_newlink+0x6de/0xa80 [ 22.542376][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 22.542515][ T11] netlink_rcv_skb+0x130/0x360 [ 22.542658][ T11] netlink_unicast+0x44b/0x710 [ 22.542802][ T11] netlink_sendmsg+0x723/0xbe0 [ 22.542947][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 22.543089][ T11] ___sys_sendmsg+0xee/0x170 [ 22.543232][ T11] __sys_sendmsg+0x109/0x1a0 [ 22.543378][ T11] do_syscall_64+0xc1/0x1d0 [ 22.543540][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.543717][ T11] [ 22.543796][ T11] The buggy address belongs to the object at ffff8880027b8040 [ 22.543796][ T11] which belongs to the cache net_namespace of size 6528 [ 22.544167][ T11] The buggy address is located 184 bytes inside of [ 22.544167][ T11] freed 6528-byte region [ffff8880027b8040, ffff8880027b99c0) [ 22.544502][ T11] [ 22.544575][ T11] The buggy address belongs to the physical page: [ 22.544747][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880027bb640 pfn:0x27b8 [ 22.545034][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 22.545250][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 22.545428][ T11] page_type: f5(slab) [ 22.545540][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 22.545791][ T11] raw: ffff8880027bb640 0000000000040002 00000001f5000000 0000000000000000 [ 22.546039][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 22.546289][ T11] head: ffff8880027bb640 0000000000040002 00000001f5000000 0000000000000000 [ 22.546536][ T11] head: 0080000000000003 ffffea000009ee01 ffffffffffffffff 0000000000000000 [ 22.546786][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 22.547038][ T11] page dumped because: kasan: bad access detected [ 22.547211][ T11] [ 22.547284][ T11] Memory state around the buggy address: [ 22.547434][ T11] ffff8880027b7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.547649][ T11] ffff8880027b8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 22.547851][ T11] >ffff8880027b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.548057][ T11] ^ [ 22.548276][ T11] ffff8880027b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.548480][ T11] ffff8880027b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.548679][ T11] ================================================================== [ 22.548946][ T11] Disabling lock debugging due to kernel taint