[ 476.885219][ T11] ================================================================== [ 476.885554][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 476.885761][ T11] Read of size 8 at addr ffff888004d29bf8 by task kworker/u16:0/11 [ 476.885960][ T11] [ 476.886033][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 476.886251][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 476.886434][ T11] Workqueue: netns cleanup_net [ 476.886577][ T11] Call Trace: [ 476.886684][ T11] [ 476.886757][ T11] dump_stack_lvl+0x82/0xd0 [ 476.886900][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 476.887073][ T11] ? cleanup_net+0xa5d/0xb90 [ 476.887215][ T11] print_report+0xb4/0x270 [ 476.887351][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 476.887492][ T11] kasan_report+0xbd/0xf0 [ 476.887596][ T11] ? cleanup_net+0xa5d/0xb90 [ 476.887734][ T11] cleanup_net+0xa5d/0xb90 [ 476.887872][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 476.888009][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 476.888144][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 476.888281][ T11] ? lock_acquire+0x32/0xc0 [ 476.888418][ T11] ? process_one_work+0xe0b/0x16d0 [ 476.888559][ T11] process_one_work+0xe55/0x16d0 [ 476.888695][ T11] ? __pfx___lock_release+0x10/0x10 [ 476.888834][ T11] ? __pfx_process_one_work+0x10/0x10 [ 476.888971][ T11] ? assign_work+0x16c/0x240 [ 476.889109][ T11] worker_thread+0x58c/0xce0 [ 476.889248][ T11] ? __pfx_worker_thread+0x10/0x10 [ 476.889386][ T11] kthread+0x28a/0x350 [ 476.889492][ T11] ? __pfx_kthread+0x10/0x10 [ 476.889628][ T11] ret_from_fork+0x31/0x70 [ 476.889769][ T11] ? __pfx_kthread+0x10/0x10 [ 476.889912][ T11] ret_from_fork_asm+0x1a/0x30 [ 476.890051][ T11] [ 476.890156][ T11] [ 476.890230][ T11] Allocated by task 264: [ 476.890332][ T11] kasan_save_stack+0x24/0x50 [ 476.890473][ T11] kasan_save_track+0x14/0x30 [ 476.890607][ T11] __kasan_slab_alloc+0x59/0x70 [ 476.890741][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 476.890878][ T11] copy_net_ns+0xc6/0x540 [ 476.890983][ T11] create_new_namespaces+0x35f/0x920 [ 476.891122][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 476.891257][ T11] ksys_unshare+0x2c4/0x6e0 [ 476.891394][ T11] __x64_sys_unshare+0x31/0x40 [ 476.891531][ T11] do_syscall_64+0xc1/0x1d0 [ 476.891674][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 476.891844][ T11] [ 476.891916][ T11] Freed by task 11: [ 476.892015][ T11] kasan_save_stack+0x24/0x50 [ 476.892154][ T11] kasan_save_track+0x14/0x30 [ 476.892288][ T11] kasan_save_free_info+0x3b/0x60 [ 476.892427][ T11] __kasan_slab_free+0x38/0x50 [ 476.892560][ T11] kmem_cache_free+0xf8/0x330 [ 476.892711][ T11] cleanup_net+0x5a8/0xb90 [ 476.892847][ T11] process_one_work+0xe55/0x16d0 [ 476.892997][ T11] worker_thread+0x58c/0xce0 [ 476.893135][ T11] kthread+0x28a/0x350 [ 476.893242][ T11] ret_from_fork+0x31/0x70 [ 476.893380][ T11] ret_from_fork_asm+0x1a/0x30 [ 476.893518][ T11] [ 476.893592][ T11] Last potentially related work creation: [ 476.893730][ T11] kasan_save_stack+0x24/0x50 [ 476.893872][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 476.894020][ T11] insert_work+0x34/0x230 [ 476.894124][ T11] __queue_work+0x5fd/0xa40 [ 476.894259][ T11] call_timer_fn+0x13b/0x230 [ 476.894398][ T11] __run_timers+0x3ff/0x810 [ 476.894533][ T11] run_timer_softirq+0x154/0x1c0 [ 476.894669][ T11] handle_softirqs+0x1f6/0x5c0 [ 476.894807][ T11] __irq_exit_rcu+0xc4/0x100 [ 476.894947][ T11] irq_exit_rcu+0xe/0x20 [ 476.895052][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 476.895188][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 476.895356][ T11] [ 476.895428][ T11] Second to last potentially related work creation: [ 476.895598][ T11] kasan_save_stack+0x24/0x50 [ 476.895735][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 476.895880][ T11] insert_work+0x34/0x230 [ 476.895984][ T11] __queue_work+0x5fd/0xa40 [ 476.896122][ T11] call_timer_fn+0x13b/0x230 [ 476.896266][ T11] __run_timers+0x3ff/0x810 [ 476.896402][ T11] run_timer_softirq+0x154/0x1c0 [ 476.896540][ T11] handle_softirqs+0x1f6/0x5c0 [ 476.896677][ T11] do_softirq+0x4d/0xa0 [ 476.896782][ T11] __local_bh_enable_ip+0xf6/0x120 [ 476.896920][ T11] __dev_queue_xmit+0x7bf/0x18d0 [ 476.897060][ T11] ip6_finish_output2+0x659/0x10e0 [ 476.897200][ T11] ip6_finish_output+0x56f/0xe40 [ 476.897337][ T11] ip6_output+0x205/0x780 [ 476.897450][ T11] ip6_xmit+0xb0e/0x2340 [ 476.897553][ T11] inet6_csk_xmit+0x330/0x5c0 [ 476.897690][ T11] __tcp_transmit_skb+0x16c7/0x2f50 [ 476.897828][ T11] tcp_send_syn_data+0x1069/0x2280 [ 476.897965][ T11] tcp_connect+0x848/0x1200 [ 476.898101][ T11] tcp_v6_connect+0x11fa/0x1b70 [ 476.898239][ T11] __inet_stream_connect+0x272/0x9f0 [ 476.898377][ T11] tcp_sendmsg_fastopen+0x365/0x660 [ 476.898514][ T11] tcp_sendmsg_locked+0x16ee/0x3360 [ 476.898649][ T11] tcp_sendmsg+0x2c/0x50 [ 476.898752][ T11] __sys_sendto+0x25c/0x450 [ 476.898894][ T11] __x64_sys_sendto+0xe0/0x1c0 [ 476.899028][ T11] do_syscall_64+0xc1/0x1d0 [ 476.899167][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 476.899341][ T11] [ 476.899412][ T11] The buggy address belongs to the object at ffff888004d29b40 [ 476.899412][ T11] which belongs to the cache net_namespace of size 6528 [ 476.899773][ T11] The buggy address is located 184 bytes inside of [ 476.899773][ T11] freed 6528-byte region [ffff888004d29b40, ffff888004d2b4c0) [ 476.900108][ T11] [ 476.900178][ T11] The buggy address belongs to the physical page: [ 476.900344][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004d2d140 pfn:0x4d28 [ 476.900615][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 476.900822][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 476.901002][ T11] page_type: f5(slab) [ 476.901112][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 476.901353][ T11] raw: ffff888004d2d140 0000000000040003 00000001f5000000 0000000000000000 [ 476.901594][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 476.901836][ T11] head: ffff888004d2d140 0000000000040003 00000001f5000000 0000000000000000 [ 476.902075][ T11] head: 0080000000000003 ffffea0000134a01 ffffffffffffffff 0000000000000000 [ 476.902316][ T11] head: ffff888000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 476.902551][ T11] page dumped because: kasan: bad access detected [ 476.902722][ T11] [ 476.902793][ T11] Memory state around the buggy address: [ 476.902926][ T11] ffff888004d29a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 476.903121][ T11] ffff888004d29b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 476.903318][ T11] >ffff888004d29b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 476.903520][ T11] ^ [ 476.903719][ T11] ffff888004d29c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 476.903916][ T11] ffff888004d29c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 476.904110][ T11] ================================================================== [ 476.904348][ T11] Disabling lock debugging due to kernel taint