[ 11.270045][ T273] ip (273) used greatest stack depth: 23992 bytes left [ 14.500917][ T11] ================================================================== [ 14.501235][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.501452][ T11] Read of size 8 at addr ffff88800bcc80f8 by task kworker/u16:0/11 [ 14.501651][ T11] [ 14.501722][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 14.501931][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.502105][ T11] Workqueue: netns cleanup_net [ 14.502249][ T11] Call Trace: [ 14.502354][ T11] [ 14.502428][ T11] dump_stack_lvl+0x82/0xd0 [ 14.502576][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 14.502751][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.502893][ T11] print_report+0xb4/0x270 [ 14.503032][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 14.503173][ T11] kasan_report+0xbd/0xf0 [ 14.503278][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.503416][ T11] cleanup_net+0xa5d/0xb90 [ 14.503551][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.503694][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 14.503832][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 14.503971][ T11] ? lock_acquire+0x32/0xc0 [ 14.504109][ T11] ? process_one_work+0xe0b/0x16d0 [ 14.504252][ T11] process_one_work+0xe55/0x16d0 [ 14.504395][ T11] ? __pfx___lock_release+0x10/0x10 [ 14.504535][ T11] ? __pfx_process_one_work+0x10/0x10 [ 14.504685][ T11] ? assign_work+0x16c/0x240 [ 14.504826][ T11] worker_thread+0x58c/0xce0 [ 14.504969][ T11] ? __pfx_worker_thread+0x10/0x10 [ 14.505107][ T11] kthread+0x28a/0x350 [ 14.505214][ T11] ? __pfx_kthread+0x10/0x10 [ 14.505355][ T11] ret_from_fork+0x31/0x70 [ 14.505497][ T11] ? __pfx_kthread+0x10/0x10 [ 14.505634][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.505777][ T11] [ 14.505883][ T11] [ 14.505956][ T11] Allocated by task 261: [ 14.506064][ T11] kasan_save_stack+0x24/0x50 [ 14.506208][ T11] kasan_save_track+0x14/0x30 [ 14.506345][ T11] __kasan_slab_alloc+0x59/0x70 [ 14.506496][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.506639][ T11] copy_net_ns+0xc6/0x540 [ 14.506745][ T11] create_new_namespaces+0x35f/0x920 [ 14.506885][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.507018][ T11] ksys_unshare+0x2c4/0x6e0 [ 14.507162][ T11] __x64_sys_unshare+0x31/0x40 [ 14.507295][ T11] do_syscall_64+0xc1/0x1d0 [ 14.507436][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.507606][ T11] [ 14.507678][ T11] Freed by task 11: [ 14.507781][ T11] kasan_save_stack+0x24/0x50 [ 14.507920][ T11] kasan_save_track+0x14/0x30 [ 14.508059][ T11] kasan_save_free_info+0x3b/0x60 [ 14.508198][ T11] __kasan_slab_free+0x38/0x50 [ 14.508336][ T11] kmem_cache_free+0xf8/0x330 [ 14.508473][ T11] cleanup_net+0x5a8/0xb90 [ 14.508609][ T11] process_one_work+0xe55/0x16d0 [ 14.508752][ T11] worker_thread+0x58c/0xce0 [ 14.508889][ T11] kthread+0x28a/0x350 [ 14.508993][ T11] ret_from_fork+0x31/0x70 [ 14.509129][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.509266][ T11] [ 14.509338][ T11] Last potentially related work creation: [ 14.509478][ T11] kasan_save_stack+0x24/0x50 [ 14.509615][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.509753][ T11] insert_work+0x34/0x230 [ 14.509860][ T11] __queue_work+0x5fd/0xa40 [ 14.510000][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.510137][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.510276][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 14.510417][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.510554][ T11] netlink_rcv_skb+0x130/0x360 [ 14.510697][ T11] netlink_unicast+0x44b/0x710 [ 14.510833][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.510973][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.511113][ T11] ___sys_sendmsg+0xee/0x170 [ 14.511252][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.511391][ T11] do_syscall_64+0xc1/0x1d0 [ 14.511534][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.511706][ T11] [ 14.511777][ T11] Second to last potentially related work creation: [ 14.511949][ T11] kasan_save_stack+0x24/0x50 [ 14.512092][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.512232][ T11] insert_work+0x34/0x230 [ 14.512336][ T11] __queue_work+0x5fd/0xa40 [ 14.512475][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.512615][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.512759][ T11] inetdev_event+0xb18/0xcf0 [ 14.512894][ T11] notifier_call_chain+0xcd/0x150 [ 14.513032][ T11] __dev_notify_flags+0xe6/0x250 [ 14.513168][ T11] dev_change_flags+0xec/0x160 [ 14.513309][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 14.513445][ T11] rtnl_newlink+0x6de/0xa80 [ 14.513581][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.513718][ T11] netlink_rcv_skb+0x130/0x360 [ 14.513859][ T11] netlink_unicast+0x44b/0x710 [ 14.513995][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.514132][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.514266][ T11] ___sys_sendmsg+0xee/0x170 [ 14.514402][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.514538][ T11] do_syscall_64+0xc1/0x1d0 [ 14.514672][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.514841][ T11] [ 14.514910][ T11] The buggy address belongs to the object at ffff88800bcc8040 [ 14.514910][ T11] which belongs to the cache net_namespace of size 6528 [ 14.515275][ T11] The buggy address is located 184 bytes inside of [ 14.515275][ T11] freed 6528-byte region [ffff88800bcc8040, ffff88800bcc99c0) [ 14.515601][ T11] [ 14.515670][ T11] The buggy address belongs to the physical page: [ 14.515855][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bccb640 pfn:0xbcc8 [ 14.516135][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.516340][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.516515][ T11] page_type: f5(slab) [ 14.516621][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.516862][ T11] raw: ffff88800bccb640 0000000000040002 00000001f5000000 0000000000000000 [ 14.517108][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.517347][ T11] head: ffff88800bccb640 0000000000040002 00000001f5000000 0000000000000000 [ 14.517585][ T11] head: 0080000000000003 ffffea00002f3201 ffffffffffffffff 0000000000000000 [ 14.517821][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.518060][ T11] page dumped because: kasan: bad access detected [ 14.518233][ T11] [ 14.518302][ T11] Memory state around the buggy address: [ 14.518438][ T11] ffff88800bcc7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.518636][ T11] ffff88800bcc8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.518850][ T11] >ffff88800bcc8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.519053][ T11] ^ [ 14.519251][ T11] ffff88800bcc8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.519449][ T11] ffff88800bcc8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.519649][ T11] ================================================================== [ 14.519886][ T11] Disabling lock debugging due to kernel taint [ 46.198436][ T867] IPv6: Can't replace route, no match found [ 48.488487][ T937] IPv6: Can't replace route, no match found [ 88.048704][ T1853] Mirror/redirect action on [ 173.407557][ T2482] veth2: entered promiscuous mode [ 173.426151][ T2482] veth2: left promiscuous mode