[ 11.181765][ T11] ================================================================== [ 11.182007][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.182205][ T11] Read of size 8 at addr ffff8880598880f8 by task kworker/u16:0/11 [ 11.182380][ T11] [ 11.182462][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.182649][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.182804][ T11] Workqueue: netns cleanup_net [ 11.182953][ T11] Call Trace: [ 11.183048][ T11] [ 11.183115][ T11] dump_stack_lvl+0x82/0xd0 [ 11.183244][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.183410][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.183547][ T11] print_report+0xb4/0x270 [ 11.183673][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.183794][ T11] kasan_report+0xbd/0xf0 [ 11.183887][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.184013][ T11] cleanup_net+0xa5d/0xb90 [ 11.184154][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.184281][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.184424][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.184547][ T11] ? lock_acquire+0x32/0xc0 [ 11.184670][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.184812][ T11] process_one_work+0xe55/0x16d0 [ 11.184938][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.185063][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.185206][ T11] ? assign_work+0x16c/0x240 [ 11.185338][ T11] worker_thread+0x58c/0xce0 [ 11.185470][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.185610][ T11] kthread+0x28a/0x350 [ 11.185708][ T11] ? __pfx_kthread+0x10/0x10 [ 11.185829][ T11] ret_from_fork+0x31/0x70 [ 11.185952][ T11] ? __pfx_kthread+0x10/0x10 [ 11.186095][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.186225][ T11] [ 11.186320][ T11] [ 11.186382][ T11] Allocated by task 253: [ 11.186475][ T11] kasan_save_stack+0x24/0x50 [ 11.186599][ T11] kasan_save_track+0x14/0x30 [ 11.186741][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.186865][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.186989][ T11] copy_net_ns+0xc6/0x540 [ 11.187083][ T11] create_new_namespaces+0x35f/0x920 [ 11.187216][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.187350][ T11] ksys_unshare+0x2c4/0x6e0 [ 11.187474][ T11] __x64_sys_unshare+0x31/0x40 [ 11.187602][ T11] do_syscall_64+0xc1/0x1d0 [ 11.187735][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.187887][ T11] [ 11.187957][ T11] Freed by task 11: [ 11.188059][ T11] kasan_save_stack+0x24/0x50 [ 11.188183][ T11] kasan_save_track+0x14/0x30 [ 11.188318][ T11] kasan_save_free_info+0x3b/0x60 [ 11.188445][ T11] __kasan_slab_free+0x38/0x50 [ 11.188565][ T11] kmem_cache_free+0xf8/0x330 [ 11.188685][ T11] cleanup_net+0x5a8/0xb90 [ 11.188808][ T11] process_one_work+0xe55/0x16d0 [ 11.188955][ T11] worker_thread+0x58c/0xce0 [ 11.189077][ T11] kthread+0x28a/0x350 [ 11.189172][ T11] ret_from_fork+0x31/0x70 [ 11.189312][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.189434][ T11] [ 11.189497][ T11] Last potentially related work creation: [ 11.189633][ T11] kasan_save_stack+0x24/0x50 [ 11.189756][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.189883][ T11] insert_work+0x34/0x230 [ 11.189997][ T11] __queue_work+0x5fd/0xa40 [ 11.190118][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.190240][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.190374][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 11.190503][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.190631][ T11] netlink_rcv_skb+0x130/0x360 [ 11.190754][ T11] netlink_unicast+0x44b/0x710 [ 11.190880][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.191002][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.191126][ T11] ___sys_sendmsg+0xee/0x170 [ 11.191253][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.191381][ T11] do_syscall_64+0xc1/0x1d0 [ 11.191505][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.191662][ T11] [ 11.191726][ T11] Second to last potentially related work creation: [ 11.191881][ T11] kasan_save_stack+0x24/0x50 [ 11.192009][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.192134][ T11] insert_work+0x34/0x230 [ 11.192228][ T11] __queue_work+0x5fd/0xa40 [ 11.192370][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.192494][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.192715][ T11] inetdev_event+0xb18/0xcf0 [ 11.192839][ T11] notifier_call_chain+0xcd/0x150 [ 11.192974][ T11] __dev_notify_flags+0xe6/0x250 [ 11.193103][ T11] dev_change_flags+0xec/0x160 [ 11.193227][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 11.193356][ T11] rtnl_newlink+0x6de/0xa80 [ 11.193481][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.193609][ T11] netlink_rcv_skb+0x130/0x360 [ 11.193740][ T11] netlink_unicast+0x44b/0x710 [ 11.193873][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.193999][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.194127][ T11] ___sys_sendmsg+0xee/0x170 [ 11.194251][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.194385][ T11] do_syscall_64+0xc1/0x1d0 [ 11.194511][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.194669][ T11] [ 11.194733][ T11] The buggy address belongs to the object at ffff888059888040 [ 11.194733][ T11] which belongs to the cache net_namespace of size 6528 [ 11.195069][ T11] The buggy address is located 184 bytes inside of [ 11.195069][ T11] freed 6528-byte region [ffff888059888040, ffff8880598899c0) [ 11.195381][ T11] [ 11.195445][ T11] The buggy address belongs to the physical page: [ 11.195593][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805988b640 pfn:0x59888 [ 11.195846][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.196032][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.196195][ T11] page_type: f5(slab) [ 11.196293][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.196549][ T11] raw: ffff88805988b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.196764][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.196982][ T11] head: ffff88805988b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.197222][ T11] head: 0080000000000003 ffffea0001662201 ffffffffffffffff 0000000000000000 [ 11.197449][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.197665][ T11] page dumped because: kasan: bad access detected [ 11.197814][ T11] [ 11.197877][ T11] Memory state around the buggy address: [ 11.198003][ T11] ffff888059887f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.198185][ T11] ffff888059888000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.198366][ T11] >ffff888059888080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.198547][ T11] ^ [ 11.198727][ T11] ffff888059888100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.198901][ T11] ffff888059888180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.199095][ T11] ================================================================== [ 11.199316][ T11] Disabling lock debugging due to kernel taint [ 22.009971][ C0] IPv4: Oversized IP packet from 172.17.0.2