[ 14.034136][ T11] ================================================================== [ 14.034442][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.034634][ T11] Read of size 8 at addr ffff88800ca680f8 by task kworker/u16:0/11 [ 14.034818][ T11] [ 14.034886][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 14.035078][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.035240][ T11] Workqueue: netns cleanup_net [ 14.035374][ T11] Call Trace: [ 14.035473][ T11] [ 14.035540][ T11] dump_stack_lvl+0x82/0xd0 [ 14.035674][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 14.035834][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.035961][ T11] print_report+0xb4/0x270 [ 14.036086][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 14.036214][ T11] kasan_report+0xbd/0xf0 [ 14.036311][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.036452][ T11] cleanup_net+0xa5d/0xb90 [ 14.036576][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.036702][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 14.036825][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 14.036948][ T11] ? lock_acquire+0x32/0xc0 [ 14.037076][ T11] ? process_one_work+0xe0b/0x16d0 [ 14.037205][ T11] process_one_work+0xe55/0x16d0 [ 14.037330][ T11] ? __pfx___lock_release+0x10/0x10 [ 14.037457][ T11] ? __pfx_process_one_work+0x10/0x10 [ 14.037583][ T11] ? assign_work+0x16c/0x240 [ 14.037707][ T11] worker_thread+0x58c/0xce0 [ 14.037832][ T11] ? __pfx_worker_thread+0x10/0x10 [ 14.037957][ T11] kthread+0x28a/0x350 [ 14.038054][ T11] ? __pfx_kthread+0x10/0x10 [ 14.038177][ T11] ret_from_fork+0x31/0x70 [ 14.038301][ T11] ? __pfx_kthread+0x10/0x10 [ 14.038423][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.038554][ T11] [ 14.038652][ T11] [ 14.038715][ T11] Allocated by task 259: [ 14.038809][ T11] kasan_save_stack+0x24/0x50 [ 14.038953][ T11] kasan_save_track+0x14/0x30 [ 14.039077][ T11] __kasan_slab_alloc+0x59/0x70 [ 14.039201][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.039329][ T11] copy_net_ns+0xc6/0x540 [ 14.039428][ T11] create_new_namespaces+0x35f/0x920 [ 14.039555][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.039687][ T11] ksys_unshare+0x2c4/0x6e0 [ 14.039814][ T11] __x64_sys_unshare+0x31/0x40 [ 14.039941][ T11] do_syscall_64+0xc1/0x1d0 [ 14.040069][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.040230][ T11] [ 14.040294][ T11] Freed by task 11: [ 14.040391][ T11] kasan_save_stack+0x24/0x50 [ 14.040522][ T11] kasan_save_track+0x14/0x30 [ 14.040652][ T11] kasan_save_free_info+0x3b/0x60 [ 14.040779][ T11] __kasan_slab_free+0x38/0x50 [ 14.040904][ T11] kmem_cache_free+0xf8/0x330 [ 14.041029][ T11] cleanup_net+0x5a8/0xb90 [ 14.041157][ T11] process_one_work+0xe55/0x16d0 [ 14.041281][ T11] worker_thread+0x58c/0xce0 [ 14.041406][ T11] kthread+0x28a/0x350 [ 14.041502][ T11] ret_from_fork+0x31/0x70 [ 14.041628][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.041763][ T11] [ 14.041829][ T11] Last potentially related work creation: [ 14.041952][ T11] kasan_save_stack+0x24/0x50 [ 14.042078][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.042226][ T11] insert_work+0x34/0x230 [ 14.042323][ T11] __queue_work+0x5fd/0xa40 [ 14.042451][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.042577][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.042706][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 14.042836][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.042964][ T11] netlink_rcv_skb+0x130/0x360 [ 14.043093][ T11] netlink_unicast+0x44b/0x710 [ 14.043220][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.043348][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.043474][ T11] ___sys_sendmsg+0xee/0x170 [ 14.043600][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.043741][ T11] do_syscall_64+0xc1/0x1d0 [ 14.043869][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.044039][ T11] [ 14.044103][ T11] Second to last potentially related work creation: [ 14.044252][ T11] kasan_save_stack+0x24/0x50 [ 14.044378][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.044502][ T11] insert_work+0x34/0x230 [ 14.044597][ T11] __queue_work+0x5fd/0xa40 [ 14.044722][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.044846][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.044970][ T11] inetdev_event+0xb18/0xcf0 [ 14.045113][ T11] notifier_call_chain+0xcd/0x150 [ 14.045250][ T11] __dev_notify_flags+0xe6/0x250 [ 14.045378][ T11] dev_change_flags+0xec/0x160 [ 14.045506][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 14.045636][ T11] rtnl_newlink+0x6de/0xa80 [ 14.045765][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.045895][ T11] netlink_rcv_skb+0x130/0x360 [ 14.046023][ T11] netlink_unicast+0x44b/0x710 [ 14.046152][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.046281][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.046408][ T11] ___sys_sendmsg+0xee/0x170 [ 14.046538][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.046672][ T11] do_syscall_64+0xc1/0x1d0 [ 14.046803][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.046967][ T11] [ 14.047034][ T11] The buggy address belongs to the object at ffff88800ca68040 [ 14.047034][ T11] which belongs to the cache net_namespace of size 6528 [ 14.047365][ T11] The buggy address is located 184 bytes inside of [ 14.047365][ T11] freed 6528-byte region [ffff88800ca68040, ffff88800ca699c0) [ 14.047666][ T11] [ 14.047730][ T11] The buggy address belongs to the physical page: [ 14.047895][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ca6b640 pfn:0xca68 [ 14.048141][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.048353][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.048517][ T11] page_type: f5(slab) [ 14.048617][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.048848][ T11] raw: ffff88800ca6b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.049071][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.049294][ T11] head: ffff88800ca6b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.049521][ T11] head: 0080000000000003 ffffea0000329a01 ffffffffffffffff 0000000000000000 [ 14.049743][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.049963][ T11] page dumped because: kasan: bad access detected [ 14.050118][ T11] [ 14.050181][ T11] Memory state around the buggy address: [ 14.050302][ T11] ffff88800ca67f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.050492][ T11] ffff88800ca68000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.050671][ T11] >ffff88800ca68080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.050855][ T11] ^ [ 14.051036][ T11] ffff88800ca68100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.051218][ T11] ffff88800ca68180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.051402][ T11] ================================================================== [ 14.051615][ T11] Disabling lock debugging due to kernel taint [ 24.755728][ T409] GACT probability NOT on