[ 10.338758][ T237] bond0: (slave eth0): making interface the new active one [ 10.339650][ T237] bond0: (slave eth0): Enslaving as an active interface with an up link [ 10.347930][ T237] ip (237) used greatest stack depth: 23520 bytes left [ 15.119441][ T242] bond0: (slave eth0): Releasing backup interface [ 15.595173][ T245] bond0: (slave eth0): Enslaving as an active interface with an up link [ 20.173001][ T67] bond0: (slave eth0): Releasing backup interface [ 20.512503][ T67] bond0 (unregistering): Released all slaves [ 20.605896][ T67] ================================================================== [ 20.606245][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 20.606575][ T67] Read of size 8 at addr ffff88800a7280f8 by task kworker/u16:1/67 [ 20.606869][ T67] [ 20.606969][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 20.607283][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.607537][ T67] Workqueue: netns cleanup_net [ 20.607753][ T67] Call Trace: [ 20.607897][ T67] [ 20.607996][ T67] dump_stack_lvl+0x82/0xd0 [ 20.608210][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 20.608484][ T67] ? cleanup_net+0x932/0xa40 [ 20.608703][ T67] print_report+0xb4/0x270 [ 20.608920][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 20.609112][ T67] kasan_report+0xbd/0xf0 [ 20.609257][ T67] ? cleanup_net+0x932/0xa40 [ 20.609460][ T67] cleanup_net+0x932/0xa40 [ 20.609654][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.609870][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 20.610074][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 20.610296][ T67] ? lock_acquire+0x32/0xc0 [ 20.610502][ T67] ? process_one_work+0xe0b/0x16d0 [ 20.610723][ T67] process_one_work+0xe55/0x16d0 [ 20.610918][ T67] ? __pfx___lock_release+0x10/0x10 [ 20.611135][ T67] ? __pfx_process_one_work+0x10/0x10 [ 20.611332][ T67] ? assign_work+0x16c/0x240 [ 20.611534][ T67] worker_thread+0x58c/0xce0 [ 20.611727][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 20.611972][ T67] ? __pfx_worker_thread+0x10/0x10 [ 20.612166][ T67] ? __pfx_worker_thread+0x10/0x10 [ 20.612360][ T67] kthread+0x28a/0x350 [ 20.612512][ T67] ? __pfx_kthread+0x10/0x10 [ 20.612707][ T67] ret_from_fork+0x31/0x70 [ 20.612900][ T67] ? __pfx_kthread+0x10/0x10 [ 20.613099][ T67] ret_from_fork_asm+0x1a/0x30 [ 20.613321][ T67] [ 20.613494][ T67] [ 20.613592][ T67] Allocated by task 230: [ 20.613739][ T67] kasan_save_stack+0x24/0x50 [ 20.613959][ T67] kasan_save_track+0x14/0x30 [ 20.614152][ T67] __kasan_slab_alloc+0x59/0x70 [ 20.614346][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.614545][ T67] copy_net_ns+0xc6/0x340 [ 20.614690][ T67] create_new_namespaces+0x35f/0x920 [ 20.614885][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 20.615083][ T67] ksys_unshare+0x2a9/0x660 [ 20.615277][ T67] __x64_sys_unshare+0x31/0x40 [ 20.615479][ T67] do_syscall_64+0xc1/0x1d0 [ 20.615672][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.615917][ T67] [ 20.616013][ T67] Freed by task 67: [ 20.616161][ T67] kasan_save_stack+0x24/0x50 [ 20.616356][ T67] kasan_save_track+0x14/0x30 [ 20.616558][ T67] kasan_save_free_info+0x3b/0x60 [ 20.616751][ T67] __kasan_slab_free+0x38/0x50 [ 20.616946][ T67] kmem_cache_free+0xf8/0x330 [ 20.617140][ T67] cleanup_net+0x5a8/0xa40 [ 20.617335][ T67] process_one_work+0xe55/0x16d0 [ 20.617535][ T67] worker_thread+0x58c/0xce0 [ 20.617729][ T67] kthread+0x28a/0x350 [ 20.617874][ T67] ret_from_fork+0x31/0x70 [ 20.618069][ T67] ret_from_fork_asm+0x1a/0x30 [ 20.618263][ T67] [ 20.618361][ T67] Last potentially related work creation: [ 20.618562][ T67] kasan_save_stack+0x24/0x50 [ 20.618756][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 20.618952][ T67] insert_work+0x34/0x230 [ 20.619098][ T67] __queue_work+0x5fd/0xa40 [ 20.619290][ T67] queue_delayed_work_on+0x8c/0xa0 [ 20.619493][ T67] __inet_insert_ifa+0x751/0xb10 [ 20.619711][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 20.619905][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 20.620130][ T67] netlink_rcv_skb+0x130/0x360 [ 20.620351][ T67] netlink_unicast+0x44b/0x710 [ 20.620548][ T67] netlink_sendmsg+0x723/0xbe0 [ 20.620741][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 20.620940][ T67] ___sys_sendmsg+0xee/0x170 [ 20.621134][ T67] __sys_sendmsg+0x109/0x1a0 [ 20.621327][ T67] do_syscall_64+0xc1/0x1d0 [ 20.621529][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.621775][ T67] [ 20.621891][ T67] The buggy address belongs to the object at ffff88800a728040 [ 20.621891][ T67] which belongs to the cache net_namespace of size 5696 [ 20.622436][ T67] The buggy address is located 184 bytes inside of [ 20.622436][ T67] freed 5696-byte region [ffff88800a728040, ffff88800a729680) [ 20.622942][ T67] [ 20.623039][ T67] The buggy address belongs to the physical page: [ 20.623284][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a72afc0 pfn:0xa728 [ 20.623707][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.624003][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.624270][ T67] page_type: f5(slab) [ 20.624428][ T67] raw: 0080000000000240 ffff888001965240 ffff88800196a088 ffff88800196a088 [ 20.624791][ T67] raw: ffff88800a72afc0 0000000000050002 00000001f5000000 0000000000000000 [ 20.625136][ T67] head: 0080000000000240 ffff888001965240 ffff88800196a088 ffff88800196a088 [ 20.625482][ T67] head: ffff88800a72afc0 0000000000050002 00000001f5000000 0000000000000000 [ 20.625826][ T67] head: 0080000000000003 ffffea000029ca01 ffffffffffffffff 0000000000000000 [ 20.626167][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.626512][ T67] page dumped because: kasan: bad access detected [ 20.626755][ T67] [ 20.626852][ T67] Memory state around the buggy address: [ 20.627048][ T67] ffff88800a727f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 20.627340][ T67] ffff88800a728000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.627648][ T67] >ffff88800a728080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.627939][ T67] ^ [ 20.628232][ T67] ffff88800a728100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.628531][ T67] ffff88800a728180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.628820][ T67] ================================================================== [ 20.629194][ T67] Disabling lock debugging due to kernel taint