[ 10.455575][ T257] ip (257) used greatest stack depth: 24080 bytes left [ 13.784683][ T66] ================================================================== [ 13.784920][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.785114][ T66] Read of size 8 at addr ffff8880057780f8 by task kworker/u16:1/66 [ 13.785304][ T66] [ 13.785371][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 13.785570][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.785737][ T66] Workqueue: netns cleanup_net [ 13.785888][ T66] Call Trace: [ 13.785990][ T66] [ 13.786062][ T66] dump_stack_lvl+0x82/0xd0 [ 13.786196][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 13.786375][ T66] ? cleanup_net+0xa5d/0xb90 [ 13.786504][ T66] print_report+0xb4/0x270 [ 13.786641][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 13.786771][ T66] kasan_report+0xbd/0xf0 [ 13.786874][ T66] ? cleanup_net+0xa5d/0xb90 [ 13.787003][ T66] cleanup_net+0xa5d/0xb90 [ 13.787143][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.787279][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 13.787408][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 13.787534][ T66] ? lock_acquire+0x32/0xc0 [ 13.787663][ T66] ? process_one_work+0xe0b/0x16d0 [ 13.787795][ T66] process_one_work+0xe55/0x16d0 [ 13.787926][ T66] ? __pfx___lock_release+0x10/0x10 [ 13.788056][ T66] ? __pfx_process_one_work+0x10/0x10 [ 13.788189][ T66] ? assign_work+0x16c/0x240 [ 13.788322][ T66] worker_thread+0x58c/0xce0 [ 13.788449][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 13.788620][ T66] ? __pfx_worker_thread+0x10/0x10 [ 13.788747][ T66] ? __pfx_worker_thread+0x10/0x10 [ 13.788892][ T66] kthread+0x28a/0x350 [ 13.788996][ T66] ? __pfx_kthread+0x10/0x10 [ 13.789131][ T66] ret_from_fork+0x31/0x70 [ 13.789257][ T66] ? __pfx_kthread+0x10/0x10 [ 13.789389][ T66] ret_from_fork_asm+0x1a/0x30 [ 13.789529][ T66] [ 13.789632][ T66] [ 13.789704][ T66] Allocated by task 253: [ 13.789804][ T66] kasan_save_stack+0x24/0x50 [ 13.789944][ T66] kasan_save_track+0x14/0x30 [ 13.790070][ T66] __kasan_slab_alloc+0x59/0x70 [ 13.790197][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.790342][ T66] copy_net_ns+0xc6/0x540 [ 13.790453][ T66] create_new_namespaces+0x35f/0x920 [ 13.790579][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.790704][ T66] ksys_unshare+0x2c4/0x6e0 [ 13.790833][ T66] __x64_sys_unshare+0x31/0x40 [ 13.790960][ T66] do_syscall_64+0xc1/0x1d0 [ 13.791086][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.791240][ T66] [ 13.791303][ T66] Freed by task 66: [ 13.791398][ T66] kasan_save_stack+0x24/0x50 [ 13.791526][ T66] kasan_save_track+0x14/0x30 [ 13.791655][ T66] kasan_save_free_info+0x3b/0x60 [ 13.791781][ T66] __kasan_slab_free+0x38/0x50 [ 13.791901][ T66] kmem_cache_free+0xf8/0x330 [ 13.792024][ T66] cleanup_net+0x5a8/0xb90 [ 13.792146][ T66] process_one_work+0xe55/0x16d0 [ 13.792281][ T66] worker_thread+0x58c/0xce0 [ 13.792410][ T66] kthread+0x28a/0x350 [ 13.792506][ T66] ret_from_fork+0x31/0x70 [ 13.792626][ T66] ret_from_fork_asm+0x1a/0x30 [ 13.792746][ T66] [ 13.792808][ T66] Last potentially related work creation: [ 13.792931][ T66] kasan_save_stack+0x24/0x50 [ 13.793060][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 13.793188][ T66] insert_work+0x34/0x230 [ 13.793281][ T66] __queue_work+0x5fd/0xa40 [ 13.793408][ T66] queue_delayed_work_on+0x8c/0xa0 [ 13.793543][ T66] __inet_insert_ifa+0x751/0xb10 [ 13.793670][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 13.793795][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 13.793919][ T66] netlink_rcv_skb+0x130/0x360 [ 13.794046][ T66] netlink_unicast+0x44b/0x710 [ 13.794171][ T66] netlink_sendmsg+0x723/0xbe0 [ 13.794296][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 13.794422][ T66] ___sys_sendmsg+0xee/0x170 [ 13.794557][ T66] __sys_sendmsg+0x109/0x1a0 [ 13.794693][ T66] do_syscall_64+0xc1/0x1d0 [ 13.794820][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.794974][ T66] [ 13.795039][ T66] Second to last potentially related work creation: [ 13.795194][ T66] kasan_save_stack+0x24/0x50 [ 13.795317][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 13.795447][ T66] insert_work+0x34/0x230 [ 13.795543][ T66] __queue_work+0x5fd/0xa40 [ 13.795665][ T66] queue_delayed_work_on+0x8c/0xa0 [ 13.795787][ T66] __inet_insert_ifa+0x751/0xb10 [ 13.795911][ T66] inetdev_event+0xb18/0xcf0 [ 13.796037][ T66] notifier_call_chain+0xcd/0x150 [ 13.796166][ T66] __dev_notify_flags+0xe6/0x250 [ 13.796289][ T66] dev_change_flags+0xec/0x160 [ 13.796410][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 13.796534][ T66] rtnl_newlink+0x6de/0xa80 [ 13.796662][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 13.796790][ T66] netlink_rcv_skb+0x130/0x360 [ 13.796914][ T66] netlink_unicast+0x44b/0x710 [ 13.797053][ T66] netlink_sendmsg+0x723/0xbe0 [ 13.797210][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 13.797336][ T66] ___sys_sendmsg+0xee/0x170 [ 13.797472][ T66] __sys_sendmsg+0x109/0x1a0 [ 13.797607][ T66] do_syscall_64+0xc1/0x1d0 [ 13.797738][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.797900][ T66] [ 13.797968][ T66] The buggy address belongs to the object at ffff888005778040 [ 13.797968][ T66] which belongs to the cache net_namespace of size 6528 [ 13.798317][ T66] The buggy address is located 184 bytes inside of [ 13.798317][ T66] freed 6528-byte region [ffff888005778040, ffff8880057799c0) [ 13.798642][ T66] [ 13.798712][ T66] The buggy address belongs to the physical page: [ 13.798877][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800577d140 pfn:0x5778 [ 13.799145][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.799343][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.799517][ T66] page_type: f5(slab) [ 13.799619][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.799865][ T66] raw: ffff88800577d140 0000000000040003 00000001f5000000 0000000000000000 [ 13.800086][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.800338][ T66] head: ffff88800577d140 0000000000040003 00000001f5000000 0000000000000000 [ 13.800563][ T66] head: 0080000000000003 ffffea000015de01 ffffffffffffffff 0000000000000000 [ 13.800795][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.801034][ T66] page dumped because: kasan: bad access detected [ 13.801201][ T66] [ 13.801270][ T66] Memory state around the buggy address: [ 13.801403][ T66] ffff888005777f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.801603][ T66] ffff888005778000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.801809][ T66] >ffff888005778080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.801998][ T66] ^ [ 13.802187][ T66] ffff888005778100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.802381][ T66] ffff888005778180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.802568][ T66] ================================================================== [ 13.802781][ T66] Disabling lock debugging due to kernel taint