[ 12.010136][ T248] sctp: Hash tables configured (bind 32/56) [ 12.779336][ T260] ip (260) used greatest stack depth: 23800 bytes left [ 38.460238][ C0] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 38.731536][ C0] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 38.931925][ C1] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 39.249345][ C0] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.080255][ C2] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.112472][ C2] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.207680][ C3] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.362362][ C2] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.554550][ C2] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 40.692223][ C3] TCP: request_sock_TCP: Possible SYN flooding on port 127.0.0.1:23456. Sending cookies. [ 75.886190][ T69] ================================================================== [ 75.886407][ T69] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 75.886613][ T69] Read of size 8 at addr ffff8880098200f8 by task kworker/u16:1/69 [ 75.886800][ T69] [ 75.886874][ T69] CPU: 3 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 75.887062][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 75.887224][ T69] Workqueue: netns cleanup_net [ 75.887358][ T69] Call Trace: [ 75.887452][ T69] [ 75.887516][ T69] dump_stack_lvl+0x82/0xd0 [ 75.887643][ T69] print_address_description.constprop.0+0x2c/0x3b0 [ 75.887808][ T69] ? cleanup_net+0x932/0xa40 [ 75.887938][ T69] print_report+0xb4/0x270 [ 75.888063][ T69] ? kasan_addr_to_slab+0x25/0x80 [ 75.888195][ T69] kasan_report+0xbd/0xf0 [ 75.888289][ T69] ? cleanup_net+0x932/0xa40 [ 75.888414][ T69] cleanup_net+0x932/0xa40 [ 75.888542][ T69] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 75.888672][ T69] ? __pfx_cleanup_net+0x10/0x10 [ 75.888806][ T69] ? trace_lock_acquire+0x148/0x1f0 [ 75.888931][ T69] ? lock_acquire+0x32/0xc0 [ 75.889055][ T69] ? process_one_work+0xe0b/0x16d0 [ 75.889191][ T69] process_one_work+0xe55/0x16d0 [ 75.889316][ T69] ? __pfx___lock_release+0x10/0x10 [ 75.889440][ T69] ? __pfx_process_one_work+0x10/0x10 [ 75.889574][ T69] ? assign_work+0x16c/0x240 [ 75.889698][ T69] worker_thread+0x58c/0xce0 [ 75.889837][ T69] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 75.889993][ T69] ? __pfx_worker_thread+0x10/0x10 [ 75.890117][ T69] ? __pfx_worker_thread+0x10/0x10 [ 75.890244][ T69] kthread+0x28a/0x350 [ 75.890339][ T69] ? __pfx_kthread+0x10/0x10 [ 75.890465][ T69] ret_from_fork+0x31/0x70 [ 75.890598][ T69] ? __pfx_kthread+0x10/0x10 [ 75.890721][ T69] ret_from_fork_asm+0x1a/0x30 [ 75.890858][ T69] [ 75.890952][ T69] [ 75.891015][ T69] Allocated by task 253: [ 75.891114][ T69] kasan_save_stack+0x24/0x50 [ 75.891250][ T69] kasan_save_track+0x14/0x30 [ 75.891374][ T69] __kasan_slab_alloc+0x59/0x70 [ 75.891497][ T69] kmem_cache_alloc_noprof+0x10b/0x350 [ 75.891622][ T69] copy_net_ns+0xc6/0x340 [ 75.891733][ T69] create_new_namespaces+0x35f/0x920 [ 75.891859][ T69] unshare_nsproxy_namespaces+0x8d/0x130 [ 75.891992][ T69] ksys_unshare+0x2a9/0x660 [ 75.892131][ T69] __x64_sys_unshare+0x31/0x40 [ 75.892257][ T69] do_syscall_64+0xc1/0x1d0 [ 75.892384][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.892539][ T69] [ 75.892603][ T69] Freed by task 69: [ 75.892696][ T69] kasan_save_stack+0x24/0x50 [ 75.892824][ T69] kasan_save_track+0x14/0x30 [ 75.892948][ T69] kasan_save_free_info+0x3b/0x60 [ 75.893074][ T69] __kasan_slab_free+0x38/0x50 [ 75.893200][ T69] kmem_cache_free+0xf8/0x330 [ 75.893326][ T69] cleanup_net+0x5a8/0xa40 [ 75.893454][ T69] process_one_work+0xe55/0x16d0 [ 75.893578][ T69] worker_thread+0x58c/0xce0 [ 75.893706][ T69] kthread+0x28a/0x350 [ 75.893802][ T69] ret_from_fork+0x31/0x70 [ 75.893924][ T69] ret_from_fork_asm+0x1a/0x30 [ 75.894047][ T69] [ 75.894117][ T69] Last potentially related work creation: [ 75.894239][ T69] kasan_save_stack+0x24/0x50 [ 75.894385][ T69] __kasan_record_aux_stack+0x8e/0xa0 [ 75.894509][ T69] insert_work+0x34/0x230 [ 75.894609][ T69] __queue_work+0x5fd/0xa40 [ 75.894730][ T69] queue_delayed_work_on+0x8c/0xa0 [ 75.894854][ T69] __inet_insert_ifa+0x751/0xb10 [ 75.894979][ T69] inet_rtm_newaddr+0x833/0xbd0 [ 75.895108][ T69] rtnetlink_rcv_msg+0x712/0xc10 [ 75.895231][ T69] netlink_rcv_skb+0x130/0x360 [ 75.895355][ T69] netlink_unicast+0x44b/0x710 [ 75.895476][ T69] netlink_sendmsg+0x723/0xbe0 [ 75.895602][ T69] ____sys_sendmsg+0x7ac/0xa10 [ 75.895728][ T69] ___sys_sendmsg+0xee/0x170 [ 75.895857][ T69] __sys_sendmsg+0x109/0x1a0 [ 75.895983][ T69] do_syscall_64+0xc1/0x1d0 [ 75.896110][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.896269][ T69] [ 75.896335][ T69] Second to last potentially related work creation: [ 75.896486][ T69] kasan_save_stack+0x24/0x50 [ 75.896678][ T69] __kasan_record_aux_stack+0x8e/0xa0 [ 75.896803][ T69] insert_work+0x34/0x230 [ 75.896898][ T69] __queue_work+0x5fd/0xa40 [ 75.897023][ T69] queue_delayed_work_on+0x8c/0xa0 [ 75.897213][ T69] __inet_insert_ifa+0x751/0xb10 [ 75.897402][ T69] inetdev_event+0xb18/0xcf0 [ 75.897530][ T69] notifier_call_chain+0xcd/0x150 [ 75.897654][ T69] __dev_notify_flags+0xe6/0x250 [ 75.897843][ T69] dev_change_flags+0xec/0x160 [ 75.897967][ T69] do_setlink.constprop.0+0x79d/0x2300 [ 75.898092][ T69] rtnl_newlink+0x6de/0xa80 [ 75.898215][ T69] rtnetlink_rcv_msg+0x712/0xc10 [ 75.898341][ T69] netlink_rcv_skb+0x130/0x360 [ 75.898468][ T69] netlink_unicast+0x44b/0x710 [ 75.898591][ T69] netlink_sendmsg+0x723/0xbe0 [ 75.898714][ T69] ____sys_sendmsg+0x7ac/0xa10 [ 75.898837][ T69] ___sys_sendmsg+0xee/0x170 [ 75.898962][ T69] __sys_sendmsg+0x109/0x1a0 [ 75.899088][ T69] do_syscall_64+0xc1/0x1d0 [ 75.899214][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.899494][ T69] [ 75.899562][ T69] The buggy address belongs to the object at ffff888009820040 [ 75.899562][ T69] which belongs to the cache net_namespace of size 6592 [ 75.899954][ T69] The buggy address is located 184 bytes inside of [ 75.899954][ T69] freed 6592-byte region [ffff888009820040, ffff888009821a00) [ 75.900245][ T69] [ 75.900307][ T69] The buggy address belongs to the physical page: [ 75.900518][ T69] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9820 [ 75.900733][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 75.900921][ T69] flags: 0x80000000000040(head|node=0|zone=1) [ 75.901135][ T69] page_type: f5(slab) [ 75.901232][ T69] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 75.901456][ T69] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 75.901751][ T69] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 75.901969][ T69] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 75.902184][ T69] head: 0080000000000003 ffffea0000260801 ffffffffffffffff 0000000000000000 [ 75.902411][ T69] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 75.902701][ T69] page dumped because: kasan: bad access detected [ 75.902855][ T69] [ 75.902930][ T69] Memory state around the buggy address: [ 75.903050][ T69] ffff88800981ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 75.903243][ T69] ffff888009820000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 75.903417][ T69] >ffff888009820080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.903593][ T69] ^ [ 75.903835][ T69] ffff888009820100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.904010][ T69] ffff888009820180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.904186][ T69] ================================================================== [ 75.904473][ T69] Disabling lock debugging due to kernel taint