[ 17.864455][ T68] ================================================================== [ 17.864776][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 17.865057][ T68] Read of size 8 at addr ffff8880021280f8 by task kworker/u16:1/68 [ 17.865335][ T68] [ 17.865437][ T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 17.865749][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.865989][ T68] Workqueue: netns cleanup_net [ 17.866193][ T68] Call Trace: [ 17.866355][ T68] [ 17.866462][ T68] dump_stack_lvl+0x82/0xd0 [ 17.866671][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 17.866914][ T68] ? cleanup_net+0x932/0xa40 [ 17.867111][ T68] print_report+0xb4/0x270 [ 17.867320][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 17.867512][ T68] kasan_report+0xbd/0xf0 [ 17.867665][ T68] ? cleanup_net+0x932/0xa40 [ 17.867873][ T68] cleanup_net+0x932/0xa40 [ 17.868065][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.868263][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 17.868454][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 17.868663][ T68] ? lock_acquire+0x32/0xc0 [ 17.868865][ T68] ? process_one_work+0xe0b/0x16d0 [ 17.869062][ T68] process_one_work+0xe55/0x16d0 [ 17.869272][ T68] ? __pfx___lock_release+0x10/0x10 [ 17.869473][ T68] ? __pfx_process_one_work+0x10/0x10 [ 17.869670][ T68] ? assign_work+0x16c/0x240 [ 17.869858][ T68] worker_thread+0x58c/0xce0 [ 17.870031][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 17.870217][ T68] ? __pfx_worker_thread+0x10/0x10 [ 17.870356][ T68] ? __pfx_worker_thread+0x10/0x10 [ 17.870567][ T68] kthread+0x28a/0x350 [ 17.870679][ T68] ? __pfx_kthread+0x10/0x10 [ 17.870818][ T68] ret_from_fork+0x31/0x70 [ 17.870957][ T68] ? __pfx_kthread+0x10/0x10 [ 17.871102][ T68] ret_from_fork_asm+0x1a/0x30 [ 17.871313][ T68] [ 17.871430][ T68] [ 17.871529][ T68] Allocated by task 224: [ 17.871634][ T68] kasan_save_stack+0x24/0x50 [ 17.871782][ T68] kasan_save_track+0x14/0x30 [ 17.871919][ T68] __kasan_slab_alloc+0x59/0x70 [ 17.872062][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 17.872213][ T68] copy_net_ns+0xc6/0x340 [ 17.872319][ T68] create_new_namespaces+0x35f/0x920 [ 17.872473][ T68] unshare_nsproxy_namespaces+0x8d/0x130 [ 17.872614][ T68] ksys_unshare+0x2a9/0x660 [ 17.872759][ T68] __x64_sys_unshare+0x31/0x40 [ 17.872895][ T68] do_syscall_64+0xc1/0x1d0 [ 17.873034][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.873227][ T68] [ 17.873308][ T68] Freed by task 68: [ 17.873411][ T68] kasan_save_stack+0x24/0x50 [ 17.873549][ T68] kasan_save_track+0x14/0x30 [ 17.873689][ T68] kasan_save_free_info+0x3b/0x60 [ 17.873827][ T68] __kasan_slab_free+0x38/0x50 [ 17.873968][ T68] kmem_cache_free+0xf8/0x330 [ 17.874115][ T68] cleanup_net+0x5a8/0xa40 [ 17.874255][ T68] process_one_work+0xe55/0x16d0 [ 17.874394][ T68] worker_thread+0x58c/0xce0 [ 17.874530][ T68] kthread+0x28a/0x350 [ 17.874635][ T68] ret_from_fork+0x31/0x70 [ 17.874777][ T68] ret_from_fork_asm+0x1a/0x30 [ 17.874916][ T68] [ 17.874986][ T68] Last potentially related work creation: [ 17.875147][ T68] kasan_save_stack+0x24/0x50 [ 17.875289][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 17.875433][ T68] insert_work+0x34/0x230 [ 17.875539][ T68] __queue_work+0x5fd/0xa40 [ 17.875681][ T68] queue_delayed_work_on+0x8c/0xa0 [ 17.875822][ T68] __inet_insert_ifa+0x751/0xb10 [ 17.875961][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 17.876102][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 17.876247][ T68] netlink_rcv_skb+0x130/0x360 [ 17.876390][ T68] netlink_unicast+0x44b/0x710 [ 17.876529][ T68] netlink_sendmsg+0x723/0xbe0 [ 17.876671][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 17.876811][ T68] ___sys_sendmsg+0xee/0x170 [ 17.876952][ T68] __sys_sendmsg+0x109/0x1a0 [ 17.877093][ T68] do_syscall_64+0xc1/0x1d0 [ 17.877242][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.877416][ T68] [ 17.877488][ T68] The buggy address belongs to the object at ffff888002128040 [ 17.877488][ T68] which belongs to the cache net_namespace of size 5696 [ 17.877864][ T68] The buggy address is located 184 bytes inside of [ 17.877864][ T68] freed 5696-byte region [ffff888002128040, ffff888002129680) [ 17.878212][ T68] [ 17.878283][ T68] The buggy address belongs to the physical page: [ 17.878448][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800212afc0 pfn:0x2128 [ 17.878737][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 17.878942][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 17.879131][ T68] page_type: f5(slab) [ 17.879246][ T68] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 17.879500][ T68] raw: ffff88800212afc0 0000000000050002 00000001f5000000 0000000000000000 [ 17.879747][ T68] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 17.879999][ T68] head: ffff88800212afc0 0000000000050002 00000001f5000000 0000000000000000 [ 17.880256][ T68] head: 0080000000000003 ffffea0000084a01 ffffffffffffffff 0000000000000000 [ 17.880525][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 17.880822][ T68] page dumped because: kasan: bad access detected [ 17.881054][ T68] [ 17.881156][ T68] Memory state around the buggy address: [ 17.881307][ T68] ffff888002127f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.881592][ T68] ffff888002128000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 17.881888][ T68] >ffff888002128080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.882124][ T68] ^ [ 17.882386][ T68] ffff888002128100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.882594][ T68] ffff888002128180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.882780][ T68] ================================================================== [ 17.883002][ T68] Disabling lock debugging due to kernel taint