[ 112.794125][ T853] sctp: Hash tables configured (bind 32/56) [ 114.590835][ T875] ip (875) used greatest stack depth: 24152 bytes left [ 114.701097][ T877] ip (877) used greatest stack depth: 23744 bytes left [ 141.614009][ C1] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 141.880348][ C0] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 142.235622][ C3] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 142.599796][ C1] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 143.072490][ C3] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 143.742667][ C3] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 143.970738][ C1] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 144.272069][ C3] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 144.454701][ C1] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 175.460596][ T1154] ip (1154) used greatest stack depth: 23280 bytes left [ 181.472235][ T68] ================================================================== [ 181.472536][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 181.472785][ T68] Read of size 8 at addr ffff88800b9280f8 by task kworker/u16:1/68 [ 181.473019][ T68] [ 181.473104][ T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 181.473350][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 181.473550][ T68] Workqueue: netns cleanup_net [ 181.473718][ T68] Call Trace: [ 181.473840][ T68] [ 181.473929][ T68] dump_stack_lvl+0x82/0xd0 [ 181.474100][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 181.474313][ T68] ? cleanup_net+0x932/0xa40 [ 181.474475][ T68] print_report+0xb4/0x270 [ 181.474638][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 181.474797][ T68] kasan_report+0xbd/0xf0 [ 181.474917][ T68] ? cleanup_net+0x932/0xa40 [ 181.475076][ T68] cleanup_net+0x932/0xa40 [ 181.475231][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 181.475397][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 181.475554][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 181.475709][ T68] ? lock_acquire+0x32/0xc0 [ 181.475877][ T68] ? process_one_work+0xe0b/0x16d0 [ 181.476091][ T68] process_one_work+0xe55/0x16d0 [ 181.476316][ T68] ? __pfx___lock_release+0x10/0x10 [ 181.476531][ T68] ? __pfx_process_one_work+0x10/0x10 [ 181.476761][ T68] ? assign_work+0x16c/0x240 [ 181.476975][ T68] worker_thread+0x58c/0xce0 [ 181.477162][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 181.477437][ T68] ? __pfx_worker_thread+0x10/0x10 [ 181.477643][ T68] ? __pfx_worker_thread+0x10/0x10 [ 181.477863][ T68] kthread+0x28a/0x350 [ 181.478036][ T68] ? __pfx_kthread+0x10/0x10 [ 181.478262][ T68] ret_from_fork+0x31/0x70 [ 181.478485][ T68] ? __pfx_kthread+0x10/0x10 [ 181.478722][ T68] ret_from_fork_asm+0x1a/0x30 [ 181.478941][ T68] [ 181.479112][ T68] [ 181.479220][ T68] Allocated by task 251: [ 181.479388][ T68] kasan_save_stack+0x24/0x50 [ 181.479619][ T68] kasan_save_track+0x14/0x30 [ 181.479840][ T68] __kasan_slab_alloc+0x59/0x70 [ 181.480056][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 181.480285][ T68] copy_net_ns+0xc6/0x340 [ 181.480464][ T68] create_new_namespaces+0x35f/0x920 [ 181.480683][ T68] unshare_nsproxy_namespaces+0x8d/0x130 [ 181.480893][ T68] ksys_unshare+0x2a9/0x660 [ 181.481121][ T68] __x64_sys_unshare+0x31/0x40 [ 181.481340][ T68] do_syscall_64+0xc1/0x1d0 [ 181.481558][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 181.481850][ T68] [ 181.481974][ T68] Freed by task 68: [ 181.482150][ T68] kasan_save_stack+0x24/0x50 [ 181.482395][ T68] kasan_save_track+0x14/0x30 [ 181.482625][ T68] kasan_save_free_info+0x3b/0x60 [ 181.482857][ T68] __kasan_slab_free+0x38/0x50 [ 181.483087][ T68] kmem_cache_free+0xf8/0x330 [ 181.483305][ T68] cleanup_net+0x5a8/0xa40 [ 181.483532][ T68] process_one_work+0xe55/0x16d0 [ 181.483765][ T68] worker_thread+0x58c/0xce0 [ 181.483997][ T68] kthread+0x28a/0x350 [ 181.484181][ T68] ret_from_fork+0x31/0x70 [ 181.484420][ T68] ret_from_fork_asm+0x1a/0x30 [ 181.484654][ T68] [ 181.484770][ T68] Last potentially related work creation: [ 181.484991][ T68] kasan_save_stack+0x24/0x50 [ 181.485218][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 181.485445][ T68] insert_work+0x34/0x230 [ 181.485621][ T68] __queue_work+0x5fd/0xa40 [ 181.485877][ T68] queue_delayed_work_on+0x8c/0xa0 [ 181.486112][ T68] __inet_insert_ifa+0x751/0xb10 [ 181.486350][ T68] inetdev_event+0xb18/0xcf0 [ 181.486576][ T68] notifier_call_chain+0xcd/0x150 [ 181.486810][ T68] __dev_notify_flags+0xe6/0x250 [ 181.487044][ T68] dev_change_flags+0xec/0x160 [ 181.487272][ T68] do_setlink.constprop.0+0x79d/0x2300 [ 181.487504][ T68] rtnl_newlink+0x6de/0xa80 [ 181.487751][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 181.487987][ T68] netlink_rcv_skb+0x130/0x360 [ 181.488226][ T68] netlink_unicast+0x44b/0x710 [ 181.488460][ T68] netlink_sendmsg+0x723/0xbe0 [ 181.488685][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 181.488906][ T68] ___sys_sendmsg+0xee/0x170 [ 181.489134][ T68] __sys_sendmsg+0x109/0x1a0 [ 181.489366][ T68] do_syscall_64+0xc1/0x1d0 [ 181.489642][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 181.489959][ T68] [ 181.490078][ T68] The buggy address belongs to the object at ffff88800b928040 [ 181.490078][ T68] which belongs to the cache net_namespace of size 6592 [ 181.490670][ T68] The buggy address is located 184 bytes inside of [ 181.490670][ T68] freed 6592-byte region [ffff88800b928040, ffff88800b929a00) [ 181.491225][ T68] [ 181.491341][ T68] The buggy address belongs to the physical page: [ 181.491621][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb928 [ 181.492026][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 181.492377][ T68] flags: 0x80000000000040(head|node=0|zone=1) [ 181.492669][ T68] page_type: f5(slab) [ 181.492972][ T68] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 181.493388][ T68] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 181.493787][ T68] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 181.494309][ T68] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 181.494728][ T68] head: 0080000000000003 ffffea00002e4a01 ffffffffffffffff 0000000000000000 [ 181.495129][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 181.495527][ T68] page dumped because: kasan: bad access detected [ 181.495835][ T68] [ 181.495948][ T68] Memory state around the buggy address: [ 181.496171][ T68] ffff88800b927f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 181.496446][ T68] ffff88800b928000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 181.496677][ T68] >ffff88800b928080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 181.496911][ T68] ^ [ 181.497145][ T68] ffff88800b928100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 181.497375][ T68] ffff88800b928180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 181.497604][ T68] ================================================================== [ 181.497922][ T68] Disabling lock debugging due to kernel taint