[ 10.299108][ T256] gre: GRE over IPv4 demultiplexor driver [ 11.532448][ T279] ip_gre: GRE over IPv4 tunneling driver [ 13.093931][ T11] ================================================================== [ 13.094174][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.094397][ T11] Read of size 8 at addr ffff8880051f80f8 by task kworker/u16:0/11 [ 13.094606][ T11] [ 13.094681][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.094904][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.095091][ T11] Workqueue: netns cleanup_net [ 13.095251][ T11] Call Trace: [ 13.095364][ T11] [ 13.095440][ T11] dump_stack_lvl+0x82/0xd0 [ 13.095596][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.095777][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.095923][ T11] print_report+0xb4/0x270 [ 13.096065][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.096213][ T11] kasan_report+0xbd/0xf0 [ 13.096323][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.096467][ T11] cleanup_net+0xa5d/0xb90 [ 13.096607][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.096756][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.096897][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.097046][ T11] ? lock_acquire+0x32/0xc0 [ 13.097195][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.097340][ T11] process_one_work+0xe55/0x16d0 [ 13.097490][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.097639][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.097783][ T11] ? assign_work+0x16c/0x240 [ 13.097927][ T11] worker_thread+0x58c/0xce0 [ 13.098075][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.098214][ T11] kthread+0x28a/0x350 [ 13.098325][ T11] ? __pfx_kthread+0x10/0x10 [ 13.098469][ T11] ret_from_fork+0x31/0x70 [ 13.098613][ T11] ? __pfx_kthread+0x10/0x10 [ 13.098749][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.098903][ T11] [ 13.099011][ T11] [ 13.099083][ T11] Allocated by task 269: [ 13.099192][ T11] kasan_save_stack+0x24/0x50 [ 13.099340][ T11] kasan_save_track+0x14/0x30 [ 13.099483][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.099627][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.099776][ T11] copy_net_ns+0xc6/0x540 [ 13.099886][ T11] create_new_namespaces+0x35f/0x920 [ 13.100033][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.100177][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.100326][ T11] __x64_sys_unshare+0x31/0x40 [ 13.100475][ T11] do_syscall_64+0xc1/0x1d0 [ 13.100624][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.100809][ T11] [ 13.100883][ T11] Freed by task 11: [ 13.100985][ T11] kasan_save_stack+0x24/0x50 [ 13.101135][ T11] kasan_save_track+0x14/0x30 [ 13.101275][ T11] kasan_save_free_info+0x3b/0x60 [ 13.101414][ T11] __kasan_slab_free+0x38/0x50 [ 13.101555][ T11] kmem_cache_free+0xf8/0x330 [ 13.101693][ T11] cleanup_net+0x5a8/0xb90 [ 13.101838][ T11] process_one_work+0xe55/0x16d0 [ 13.101983][ T11] worker_thread+0x58c/0xce0 [ 13.102129][ T11] kthread+0x28a/0x350 [ 13.102234][ T11] ret_from_fork+0x31/0x70 [ 13.102381][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.102531][ T11] [ 13.102609][ T11] Last potentially related work creation: [ 13.102757][ T11] kasan_save_stack+0x24/0x50 [ 13.102906][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.103057][ T11] insert_work+0x34/0x230 [ 13.103179][ T11] __queue_work+0x5fd/0xa40 [ 13.103323][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.103470][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.103618][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.103766][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.103906][ T11] netlink_rcv_skb+0x130/0x360 [ 13.104049][ T11] netlink_unicast+0x44b/0x710 [ 13.104195][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.104333][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.104472][ T11] ___sys_sendmsg+0xee/0x170 [ 13.104615][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.104778][ T11] do_syscall_64+0xc1/0x1d0 [ 13.104919][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.105094][ T11] [ 13.105174][ T11] Second to last potentially related work creation: [ 13.105348][ T11] kasan_save_stack+0x24/0x50 [ 13.105496][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.105643][ T11] insert_work+0x34/0x230 [ 13.105755][ T11] __queue_work+0x5fd/0xa40 [ 13.105900][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.106043][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.106189][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.106332][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.106472][ T11] netlink_rcv_skb+0x130/0x360 [ 13.106611][ T11] netlink_unicast+0x44b/0x710 [ 13.106750][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.106898][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.107043][ T11] ___sys_sendmsg+0xee/0x170 [ 13.107188][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.107341][ T11] do_syscall_64+0xc1/0x1d0 [ 13.107487][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.107670][ T11] [ 13.107743][ T11] The buggy address belongs to the object at ffff8880051f8040 [ 13.107743][ T11] which belongs to the cache net_namespace of size 6528 [ 13.108098][ T11] The buggy address is located 184 bytes inside of [ 13.108098][ T11] freed 6528-byte region [ffff8880051f8040, ffff8880051f99c0) [ 13.108428][ T11] [ 13.108498][ T11] The buggy address belongs to the physical page: [ 13.108662][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880051fb640 pfn:0x51f8 [ 13.108936][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.109164][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.109339][ T11] page_type: f5(slab) [ 13.109450][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.109701][ T11] raw: ffff8880051fb640 0000000000040002 00000001f5000000 0000000000000000 [ 13.109942][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.110181][ T11] head: ffff8880051fb640 0000000000040002 00000001f5000000 0000000000000000 [ 13.110426][ T11] head: 0080000000000003 ffffea0000147e01 ffffffffffffffff 0000000000000000 [ 13.110663][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.110903][ T11] page dumped because: kasan: bad access detected [ 13.111069][ T11] [ 13.111138][ T11] Memory state around the buggy address: [ 13.111281][ T11] ffff8880051f7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 13.111480][ T11] ffff8880051f8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.111677][ T11] >ffff8880051f8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.111878][ T11] ^ [ 13.112081][ T11] ffff8880051f8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.112278][ T11] ffff8880051f8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.112473][ T11] ================================================================== [ 13.112702][ T11] Disabling lock debugging due to kernel taint [ 38.721927][ T851] ip6_gre: GRE over IPv6 tunneling driver [ 45.356408][ T8] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 50.684383][ T335] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 52.545759][ T1194] ping (1194) used greatest stack depth: 23600 bytes left [ 56.108325][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 59.052306][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 61.676359][ C0] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 64.684312][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured!