[ 10.866028][ T275] ip (275) used greatest stack depth: 23456 bytes left [ 14.038017][ T65] ================================================================== [ 14.038240][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.038448][ T65] Read of size 8 at addr ffff8880025180f8 by task kworker/u16:1/65 [ 14.038641][ T65] [ 14.038705][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 14.038903][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.039058][ T65] Workqueue: netns cleanup_net [ 14.039189][ T65] Call Trace: [ 14.039290][ T65] [ 14.039359][ T65] dump_stack_lvl+0x82/0xd0 [ 14.039503][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 14.039661][ T65] ? cleanup_net+0xa5d/0xb90 [ 14.039785][ T65] print_report+0xb4/0x270 [ 14.039908][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 14.040030][ T65] kasan_report+0xbd/0xf0 [ 14.040125][ T65] ? cleanup_net+0xa5d/0xb90 [ 14.040250][ T65] cleanup_net+0xa5d/0xb90 [ 14.040387][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.040524][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 14.040645][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 14.040767][ T65] ? lock_acquire+0x32/0xc0 [ 14.040891][ T65] ? process_one_work+0xe0b/0x16d0 [ 14.041015][ T65] process_one_work+0xe55/0x16d0 [ 14.041138][ T65] ? __pfx___lock_release+0x10/0x10 [ 14.041259][ T65] ? __pfx_process_one_work+0x10/0x10 [ 14.041388][ T65] ? assign_work+0x16c/0x240 [ 14.041510][ T65] worker_thread+0x58c/0xce0 [ 14.041633][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 14.041786][ T65] ? __pfx_worker_thread+0x10/0x10 [ 14.041910][ T65] ? __pfx_worker_thread+0x10/0x10 [ 14.042035][ T65] kthread+0x28a/0x350 [ 14.042131][ T65] ? __pfx_kthread+0x10/0x10 [ 14.042253][ T65] ret_from_fork+0x31/0x70 [ 14.042376][ T65] ? __pfx_kthread+0x10/0x10 [ 14.042498][ T65] ret_from_fork_asm+0x1a/0x30 [ 14.042627][ T65] [ 14.042719][ T65] [ 14.042782][ T65] Allocated by task 262: [ 14.042875][ T65] kasan_save_stack+0x24/0x50 [ 14.043010][ T65] kasan_save_track+0x14/0x30 [ 14.043132][ T65] __kasan_slab_alloc+0x59/0x70 [ 14.043253][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.043381][ T65] copy_net_ns+0xc6/0x540 [ 14.043475][ T65] create_new_namespaces+0x35f/0x920 [ 14.043600][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.043722][ T65] ksys_unshare+0x2c4/0x6e0 [ 14.043856][ T65] __x64_sys_unshare+0x31/0x40 [ 14.043987][ T65] do_syscall_64+0xc1/0x1d0 [ 14.044110][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.044267][ T65] [ 14.044331][ T65] Freed by task 65: [ 14.044424][ T65] kasan_save_stack+0x24/0x50 [ 14.044548][ T65] kasan_save_track+0x14/0x30 [ 14.044671][ T65] kasan_save_free_info+0x3b/0x60 [ 14.044797][ T65] __kasan_slab_free+0x38/0x50 [ 14.044935][ T65] kmem_cache_free+0xf8/0x330 [ 14.045059][ T65] cleanup_net+0x5a8/0xb90 [ 14.045183][ T65] process_one_work+0xe55/0x16d0 [ 14.045307][ T65] worker_thread+0x58c/0xce0 [ 14.045430][ T65] kthread+0x28a/0x350 [ 14.045525][ T65] ret_from_fork+0x31/0x70 [ 14.045661][ T65] ret_from_fork_asm+0x1a/0x30 [ 14.045785][ T65] [ 14.045849][ T65] Last potentially related work creation: [ 14.045979][ T65] kasan_save_stack+0x24/0x50 [ 14.046110][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 14.046235][ T65] insert_work+0x34/0x230 [ 14.046332][ T65] __queue_work+0x5fd/0xa40 [ 14.046460][ T65] queue_delayed_work_on+0x8c/0xa0 [ 14.046591][ T65] __inet_insert_ifa+0x751/0xb10 [ 14.046717][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 14.046849][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 14.046989][ T65] netlink_rcv_skb+0x130/0x360 [ 14.047116][ T65] netlink_unicast+0x44b/0x710 [ 14.047241][ T65] netlink_sendmsg+0x723/0xbe0 [ 14.047369][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 14.047497][ T65] ___sys_sendmsg+0xee/0x170 [ 14.047634][ T65] __sys_sendmsg+0x109/0x1a0 [ 14.047758][ T65] do_syscall_64+0xc1/0x1d0 [ 14.047883][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.048042][ T65] [ 14.048116][ T65] Second to last potentially related work creation: [ 14.048275][ T65] kasan_save_stack+0x24/0x50 [ 14.048408][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 14.048542][ T65] insert_work+0x34/0x230 [ 14.048644][ T65] __queue_work+0x5fd/0xa40 [ 14.048780][ T65] queue_delayed_work_on+0x8c/0xa0 [ 14.048916][ T65] __inet_insert_ifa+0x751/0xb10 [ 14.049056][ T65] inetdev_event+0xb18/0xcf0 [ 14.049192][ T65] notifier_call_chain+0xcd/0x150 [ 14.049333][ T65] __dev_notify_flags+0xe6/0x250 [ 14.049475][ T65] dev_change_flags+0xec/0x160 [ 14.049612][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 14.049752][ T65] rtnl_newlink+0x6de/0xa80 [ 14.049895][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 14.050031][ T65] netlink_rcv_skb+0x130/0x360 [ 14.050170][ T65] netlink_unicast+0x44b/0x710 [ 14.050306][ T65] netlink_sendmsg+0x723/0xbe0 [ 14.050443][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 14.050580][ T65] ___sys_sendmsg+0xee/0x170 [ 14.050719][ T65] __sys_sendmsg+0x109/0x1a0 [ 14.050853][ T65] do_syscall_64+0xc1/0x1d0 [ 14.050994][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.051163][ T65] [ 14.051232][ T65] The buggy address belongs to the object at ffff888002518040 [ 14.051232][ T65] which belongs to the cache net_namespace of size 6528 [ 14.051589][ T65] The buggy address is located 184 bytes inside of [ 14.051589][ T65] freed 6528-byte region [ffff888002518040, ffff8880025199c0) [ 14.051920][ T65] [ 14.051990][ T65] The buggy address belongs to the physical page: [ 14.052156][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800251b640 pfn:0x2518 [ 14.052430][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.052641][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.052819][ T65] page_type: f5(slab) [ 14.052929][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.053175][ T65] raw: ffff88800251b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.053417][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.053656][ T65] head: ffff88800251b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.053901][ T65] head: 0080000000000003 ffffea0000094601 ffffffffffffffff 0000000000000000 [ 14.054140][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.054379][ T65] page dumped because: kasan: bad access detected [ 14.054553][ T65] [ 14.054622][ T65] Memory state around the buggy address: [ 14.054759][ T65] ffff888002517f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 14.054956][ T65] ffff888002518000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.055153][ T65] >ffff888002518080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.055351][ T65] ^ [ 14.055548][ T65] ffff888002518100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.055746][ T65] ffff888002518180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.055945][ T65] ================================================================== [ 14.056156][ T65] Disabling lock debugging due to kernel taint [ 45.141836][ T869] IPv6: Can't replace route, no match found [ 47.206320][ T939] IPv6: Can't replace route, no match found [ 86.648733][ T1855] Mirror/redirect action on [ 172.028385][ T2482] veth2: entered promiscuous mode [ 172.055435][ T2482] veth2: left promiscuous mode