[ 19.386647][ T66] ================================================================== [ 19.386899][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 19.387105][ T66] Read of size 8 at addr ffff88800a2e00f8 by task kworker/u16:1/66 [ 19.387298][ T66] [ 19.387373][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 19.387603][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.387771][ T66] Workqueue: netns cleanup_net [ 19.387912][ T66] Call Trace: [ 19.388016][ T66] [ 19.388087][ T66] dump_stack_lvl+0x82/0xd0 [ 19.388230][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 19.388402][ T66] ? cleanup_net+0x932/0xa40 [ 19.388536][ T66] print_report+0xb4/0x270 [ 19.388682][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 19.388817][ T66] kasan_report+0xbd/0xf0 [ 19.388924][ T66] ? cleanup_net+0x932/0xa40 [ 19.389058][ T66] cleanup_net+0x932/0xa40 [ 19.389196][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 19.389337][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 19.389471][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 19.389601][ T66] ? lock_acquire+0x32/0xc0 [ 19.389737][ T66] ? process_one_work+0xe0b/0x16d0 [ 19.389880][ T66] process_one_work+0xe55/0x16d0 [ 19.390014][ T66] ? __pfx___lock_release+0x10/0x10 [ 19.390148][ T66] ? __pfx_process_one_work+0x10/0x10 [ 19.390283][ T66] ? assign_work+0x16c/0x240 [ 19.390418][ T66] worker_thread+0x58c/0xce0 [ 19.390558][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 19.390729][ T66] ? __pfx_worker_thread+0x10/0x10 [ 19.390864][ T66] ? __pfx_worker_thread+0x10/0x10 [ 19.390994][ T66] kthread+0x28a/0x350 [ 19.391098][ T66] ? __pfx_kthread+0x10/0x10 [ 19.391231][ T66] ret_from_fork+0x31/0x70 [ 19.391365][ T66] ? __pfx_kthread+0x10/0x10 [ 19.391495][ T66] ret_from_fork_asm+0x1a/0x30 [ 19.391639][ T66] [ 19.391739][ T66] [ 19.391809][ T66] Allocated by task 250: [ 19.391908][ T66] kasan_save_stack+0x24/0x50 [ 19.392049][ T66] kasan_save_track+0x14/0x30 [ 19.392199][ T66] __kasan_slab_alloc+0x59/0x70 [ 19.392330][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 19.392462][ T66] copy_net_ns+0xc6/0x340 [ 19.392573][ T66] create_new_namespaces+0x35f/0x920 [ 19.392708][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 19.392839][ T66] ksys_unshare+0x2a9/0x660 [ 19.392972][ T66] __x64_sys_unshare+0x31/0x40 [ 19.393118][ T66] do_syscall_64+0xc1/0x1d0 [ 19.393253][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.393421][ T66] [ 19.393489][ T66] Freed by task 66: [ 19.393587][ T66] kasan_save_stack+0x24/0x50 [ 19.393722][ T66] kasan_save_track+0x14/0x30 [ 19.393852][ T66] kasan_save_free_info+0x3b/0x60 [ 19.393989][ T66] __kasan_slab_free+0x38/0x50 [ 19.394125][ T66] kmem_cache_free+0xf8/0x330 [ 19.394262][ T66] cleanup_net+0x5a8/0xa40 [ 19.394396][ T66] process_one_work+0xe55/0x16d0 [ 19.394534][ T66] worker_thread+0x58c/0xce0 [ 19.394667][ T66] kthread+0x28a/0x350 [ 19.394768][ T66] ret_from_fork+0x31/0x70 [ 19.394914][ T66] ret_from_fork_asm+0x1a/0x30 [ 19.395052][ T66] [ 19.395121][ T66] Last potentially related work creation: [ 19.395259][ T66] kasan_save_stack+0x24/0x50 [ 19.395400][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 19.395543][ T66] insert_work+0x34/0x230 [ 19.395644][ T66] __queue_work+0x5fd/0xa40 [ 19.395780][ T66] queue_delayed_work_on+0x8c/0xa0 [ 19.395917][ T66] __inet_insert_ifa+0x751/0xb10 [ 19.396057][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 19.396196][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 19.396339][ T66] netlink_rcv_skb+0x130/0x360 [ 19.396488][ T66] netlink_unicast+0x44b/0x710 [ 19.396624][ T66] netlink_sendmsg+0x723/0xbe0 [ 19.396767][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 19.396912][ T66] ___sys_sendmsg+0xee/0x170 [ 19.397050][ T66] __sys_sendmsg+0x109/0x1a0 [ 19.397194][ T66] do_syscall_64+0xc1/0x1d0 [ 19.397336][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.397545][ T66] [ 19.397624][ T66] Second to last potentially related work creation: [ 19.397799][ T66] kasan_save_stack+0x24/0x50 [ 19.397949][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 19.398095][ T66] insert_work+0x34/0x230 [ 19.398211][ T66] __queue_work+0x5fd/0xa40 [ 19.398359][ T66] queue_delayed_work_on+0x8c/0xa0 [ 19.398509][ T66] __inet_insert_ifa+0x751/0xb10 [ 19.398661][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 19.398820][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 19.398969][ T66] netlink_rcv_skb+0x130/0x360 [ 19.399108][ T66] netlink_unicast+0x44b/0x710 [ 19.399260][ T66] netlink_sendmsg+0x723/0xbe0 [ 19.399399][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 19.399537][ T66] ___sys_sendmsg+0xee/0x170 [ 19.399675][ T66] __sys_sendmsg+0x109/0x1a0 [ 19.399810][ T66] do_syscall_64+0xc1/0x1d0 [ 19.399945][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.400114][ T66] [ 19.400182][ T66] The buggy address belongs to the object at ffff88800a2e0040 [ 19.400182][ T66] which belongs to the cache net_namespace of size 6592 [ 19.400554][ T66] The buggy address is located 184 bytes inside of [ 19.400554][ T66] freed 6592-byte region [ffff88800a2e0040, ffff88800a2e1a00) [ 19.400879][ T66] [ 19.400948][ T66] The buggy address belongs to the physical page: [ 19.401108][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a2e5200 pfn:0xa2e0 [ 19.401378][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.401585][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 19.401752][ T66] page_type: f5(slab) [ 19.401870][ T66] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 19.402115][ T66] raw: ffff88800a2e5200 0000000000040003 00000001f5000000 0000000000000000 [ 19.402350][ T66] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 19.402598][ T66] head: ffff88800a2e5200 0000000000040003 00000001f5000000 0000000000000000 [ 19.402835][ T66] head: 0080000000000003 ffffea000028b801 ffffffffffffffff 0000000000000000 [ 19.403068][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 19.403315][ T66] page dumped because: kasan: bad access detected [ 19.403484][ T66] [ 19.403546][ T66] Memory state around the buggy address: [ 19.403680][ T66] ffff88800a2dff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.403884][ T66] ffff88800a2e0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 19.404075][ T66] >ffff88800a2e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.404271][ T66] ^ [ 19.404478][ T66] ffff88800a2e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.404672][ T66] ffff88800a2e0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.404865][ T66] ================================================================== [ 19.405135][ T66] Disabling lock debugging due to kernel taint