[ 10.281649][ T252] sctp: Hash tables configured (bind 32/56) [ 31.497169][ T417] sctp_hello (417) used greatest stack depth: 24136 bytes left [ 47.994919][ T11] ================================================================== [ 47.995155][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 47.995363][ T11] Read of size 8 at addr ffff88800aab80f8 by task kworker/u16:0/11 [ 47.995549][ T11] [ 47.995616][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 47.995804][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 47.995962][ T11] Workqueue: netns cleanup_net [ 47.996103][ T11] Call Trace: [ 47.996200][ T11] [ 47.996270][ T11] dump_stack_lvl+0x82/0xd0 [ 47.996403][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 47.996564][ T11] ? cleanup_net+0xa5d/0xb90 [ 47.996699][ T11] print_report+0xb4/0x270 [ 47.996832][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 47.996988][ T11] kasan_report+0xbd/0xf0 [ 47.997084][ T11] ? cleanup_net+0xa5d/0xb90 [ 47.997214][ T11] cleanup_net+0xa5d/0xb90 [ 47.997346][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 47.997481][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 47.997613][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 47.997744][ T11] ? lock_acquire+0x32/0xc0 [ 47.997875][ T11] ? process_one_work+0xe0b/0x16d0 [ 47.998012][ T11] process_one_work+0xe55/0x16d0 [ 47.998142][ T11] ? __pfx___lock_release+0x10/0x10 [ 47.998274][ T11] ? __pfx_process_one_work+0x10/0x10 [ 47.998407][ T11] ? assign_work+0x16c/0x240 [ 47.998540][ T11] worker_thread+0x58c/0xce0 [ 47.998677][ T11] ? __pfx_worker_thread+0x10/0x10 [ 47.998809][ T11] kthread+0x28a/0x350 [ 47.998916][ T11] ? __pfx_kthread+0x10/0x10 [ 47.999039][ T11] ret_from_fork+0x31/0x70 [ 47.999167][ T11] ? __pfx_kthread+0x10/0x10 [ 47.999294][ T11] ret_from_fork_asm+0x1a/0x30 [ 47.999432][ T11] [ 47.999534][ T11] [ 47.999608][ T11] Allocated by task 256: [ 47.999712][ T11] kasan_save_stack+0x24/0x50 [ 47.999851][ T11] kasan_save_track+0x14/0x30 [ 47.999993][ T11] __kasan_slab_alloc+0x59/0x70 [ 48.000135][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 48.000269][ T11] copy_net_ns+0xc6/0x540 [ 48.000365][ T11] create_new_namespaces+0x35f/0x920 [ 48.000496][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 48.000623][ T11] ksys_unshare+0x2c4/0x6e0 [ 48.000757][ T11] __x64_sys_unshare+0x31/0x40 [ 48.000882][ T11] do_syscall_64+0xc1/0x1d0 [ 48.001009][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.001182][ T11] [ 48.001249][ T11] Freed by task 11: [ 48.001341][ T11] kasan_save_stack+0x24/0x50 [ 48.001468][ T11] kasan_save_track+0x14/0x30 [ 48.001594][ T11] kasan_save_free_info+0x3b/0x60 [ 48.001723][ T11] __kasan_slab_free+0x38/0x50 [ 48.001846][ T11] kmem_cache_free+0xf8/0x330 [ 48.001975][ T11] cleanup_net+0x5a8/0xb90 [ 48.002105][ T11] process_one_work+0xe55/0x16d0 [ 48.002229][ T11] worker_thread+0x58c/0xce0 [ 48.002353][ T11] kthread+0x28a/0x350 [ 48.002452][ T11] ret_from_fork+0x31/0x70 [ 48.002586][ T11] ret_from_fork_asm+0x1a/0x30 [ 48.002724][ T11] [ 48.002789][ T11] Last potentially related work creation: [ 48.002916][ T11] kasan_save_stack+0x24/0x50 [ 48.003048][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 48.003182][ T11] insert_work+0x34/0x230 [ 48.003281][ T11] __queue_work+0x5fd/0xa40 [ 48.003409][ T11] queue_delayed_work_on+0x8c/0xa0 [ 48.003537][ T11] __inet_insert_ifa+0x751/0xb10 [ 48.003685][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 48.003819][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 48.003948][ T11] netlink_rcv_skb+0x130/0x360 [ 48.004084][ T11] netlink_unicast+0x44b/0x710 [ 48.004215][ T11] netlink_sendmsg+0x723/0xbe0 [ 48.004348][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 48.004480][ T11] ___sys_sendmsg+0xee/0x170 [ 48.004616][ T11] __sys_sendmsg+0x109/0x1a0 [ 48.004746][ T11] do_syscall_64+0xc1/0x1d0 [ 48.004872][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.005037][ T11] [ 48.005100][ T11] Second to last potentially related work creation: [ 48.005256][ T11] kasan_save_stack+0x24/0x50 [ 48.005388][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 48.005518][ T11] insert_work+0x34/0x230 [ 48.005612][ T11] __queue_work+0x5fd/0xa40 [ 48.005742][ T11] queue_delayed_work_on+0x8c/0xa0 [ 48.005865][ T11] __inet_insert_ifa+0x751/0xb10 [ 48.005995][ T11] inetdev_event+0xb18/0xcf0 [ 48.006123][ T11] notifier_call_chain+0xcd/0x150 [ 48.006255][ T11] __dev_notify_flags+0xe6/0x250 [ 48.006384][ T11] dev_change_flags+0xec/0x160 [ 48.006515][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 48.006645][ T11] rtnl_newlink+0x6de/0xa80 [ 48.006787][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 48.006926][ T11] netlink_rcv_skb+0x130/0x360 [ 48.007057][ T11] netlink_unicast+0x44b/0x710 [ 48.007186][ T11] netlink_sendmsg+0x723/0xbe0 [ 48.007317][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 48.007447][ T11] ___sys_sendmsg+0xee/0x170 [ 48.007576][ T11] __sys_sendmsg+0x109/0x1a0 [ 48.007709][ T11] do_syscall_64+0xc1/0x1d0 [ 48.007844][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.008006][ T11] [ 48.008073][ T11] The buggy address belongs to the object at ffff88800aab8040 [ 48.008073][ T11] which belongs to the cache net_namespace of size 6528 [ 48.008413][ T11] The buggy address is located 184 bytes inside of [ 48.008413][ T11] freed 6528-byte region [ffff88800aab8040, ffff88800aab99c0) [ 48.008724][ T11] [ 48.008794][ T11] The buggy address belongs to the physical page: [ 48.008950][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800aabd140 pfn:0xaab8 [ 48.009217][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 48.009414][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 48.009582][ T11] page_type: f5(slab) [ 48.009685][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 48.009922][ T11] raw: ffff88800aabd140 0000000000040003 00000001f5000000 0000000000000000 [ 48.010151][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 48.010383][ T11] head: ffff88800aabd140 0000000000040003 00000001f5000000 0000000000000000 [ 48.010683][ T11] head: 0080000000000003 ffffea00002aae01 ffffffffffffffff 0000000000000000 [ 48.010911][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 48.011137][ T11] page dumped because: kasan: bad access detected [ 48.011298][ T11] [ 48.011363][ T11] Memory state around the buggy address: [ 48.011489][ T11] ffff88800aab7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.011801][ T11] ffff88800aab8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 48.011989][ T11] >ffff88800aab8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.012241][ T11] ^ [ 48.012425][ T11] ffff88800aab8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.012615][ T11] ffff88800aab8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.012794][ T11] ================================================================== [ 48.013008][ T11] Disabling lock debugging due to kernel taint