[ 11.678290][ T66] ================================================================== [ 11.678511][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.678708][ T66] Read of size 8 at addr ffff8880096300f8 by task kworker/u16:1/66 [ 11.678893][ T66] [ 11.678959][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.679145][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.679312][ T66] Workqueue: netns cleanup_net [ 11.679446][ T66] Call Trace: [ 11.679540][ T66] [ 11.679604][ T66] dump_stack_lvl+0x82/0xd0 [ 11.679727][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 11.679888][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.680009][ T66] print_report+0xb4/0x270 [ 11.680134][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 11.680255][ T66] kasan_report+0xbd/0xf0 [ 11.680346][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.680466][ T66] cleanup_net+0xa5d/0xb90 [ 11.680584][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.680709][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 11.680828][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 11.680952][ T66] ? lock_acquire+0x32/0xc0 [ 11.681091][ T66] ? process_one_work+0xe0b/0x16d0 [ 11.681220][ T66] process_one_work+0xe55/0x16d0 [ 11.681350][ T66] ? __pfx___lock_release+0x10/0x10 [ 11.681476][ T66] ? __pfx_process_one_work+0x10/0x10 [ 11.681604][ T66] ? assign_work+0x16c/0x240 [ 11.681728][ T66] worker_thread+0x58c/0xce0 [ 11.681850][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.682006][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.682128][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.682259][ T66] kthread+0x28a/0x350 [ 11.682352][ T66] ? __pfx_kthread+0x10/0x10 [ 11.682477][ T66] ret_from_fork+0x31/0x70 [ 11.682598][ T66] ? __pfx_kthread+0x10/0x10 [ 11.682715][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.682840][ T66] [ 11.682932][ T66] [ 11.682994][ T66] Allocated by task 251: [ 11.683087][ T66] kasan_save_stack+0x24/0x50 [ 11.683209][ T66] kasan_save_track+0x14/0x30 [ 11.683330][ T66] __kasan_slab_alloc+0x59/0x70 [ 11.683448][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.683573][ T66] copy_net_ns+0xc6/0x540 [ 11.683663][ T66] create_new_namespaces+0x35f/0x920 [ 11.683782][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.683902][ T66] ksys_unshare+0x2c4/0x6e0 [ 11.684026][ T66] __x64_sys_unshare+0x31/0x40 [ 11.684167][ T66] do_syscall_64+0xc1/0x1d0 [ 11.684325][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.684541][ T66] [ 11.684631][ T66] Freed by task 66: [ 11.684756][ T66] kasan_save_stack+0x24/0x50 [ 11.684907][ T66] kasan_save_track+0x14/0x30 [ 11.685033][ T66] kasan_save_free_info+0x3b/0x60 [ 11.685161][ T66] __kasan_slab_free+0x38/0x50 [ 11.685285][ T66] kmem_cache_free+0xf8/0x330 [ 11.685410][ T66] cleanup_net+0x5a8/0xb90 [ 11.685538][ T66] process_one_work+0xe55/0x16d0 [ 11.685662][ T66] worker_thread+0x58c/0xce0 [ 11.685796][ T66] kthread+0x28a/0x350 [ 11.685893][ T66] ret_from_fork+0x31/0x70 [ 11.686015][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.686147][ T66] [ 11.686212][ T66] Last potentially related work creation: [ 11.686336][ T66] kasan_save_stack+0x24/0x50 [ 11.686473][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.686606][ T66] insert_work+0x34/0x230 [ 11.686719][ T66] __queue_work+0x5fd/0xa40 [ 11.686855][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.686994][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.687123][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 11.687255][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.687387][ T66] netlink_rcv_skb+0x130/0x360 [ 11.687518][ T66] netlink_unicast+0x44b/0x710 [ 11.687650][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.687781][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.687911][ T66] ___sys_sendmsg+0xee/0x170 [ 11.688042][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.688176][ T66] do_syscall_64+0xc1/0x1d0 [ 11.688305][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.688467][ T66] [ 11.688535][ T66] Second to last potentially related work creation: [ 11.688689][ T66] kasan_save_stack+0x24/0x50 [ 11.688826][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.688965][ T66] insert_work+0x34/0x230 [ 11.689060][ T66] __queue_work+0x5fd/0xa40 [ 11.689188][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.689319][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.689447][ T66] inetdev_event+0xb18/0xcf0 [ 11.689573][ T66] notifier_call_chain+0xcd/0x150 [ 11.689705][ T66] __dev_notify_flags+0xe6/0x250 [ 11.689832][ T66] dev_change_flags+0xec/0x160 [ 11.689967][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 11.690098][ T66] rtnl_newlink+0x6de/0xa80 [ 11.690229][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.690357][ T66] netlink_rcv_skb+0x130/0x360 [ 11.690484][ T66] netlink_unicast+0x44b/0x710 [ 11.690627][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.690756][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.690898][ T66] ___sys_sendmsg+0xee/0x170 [ 11.691029][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.691157][ T66] do_syscall_64+0xc1/0x1d0 [ 11.691287][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.691457][ T66] [ 11.691521][ T66] The buggy address belongs to the object at ffff888009630040 [ 11.691521][ T66] which belongs to the cache net_namespace of size 6528 [ 11.691879][ T66] The buggy address is located 184 bytes inside of [ 11.691879][ T66] freed 6528-byte region [ffff888009630040, ffff8880096319c0) [ 11.692184][ T66] [ 11.692247][ T66] The buggy address belongs to the physical page: [ 11.692406][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009633640 pfn:0x9630 [ 11.692671][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.692863][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.693031][ T66] page_type: f5(slab) [ 11.693134][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.693370][ T66] raw: ffff888009633640 0000000000040002 00000001f5000000 0000000000000000 [ 11.693598][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.693825][ T66] head: ffff888009633640 0000000000040002 00000001f5000000 0000000000000000 [ 11.694052][ T66] head: 0080000000000003 ffffea0000258c01 ffffffffffffffff 0000000000000000 [ 11.694291][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.694520][ T66] page dumped because: kasan: bad access detected [ 11.694688][ T66] [ 11.694752][ T66] Memory state around the buggy address: [ 11.694879][ T66] ffff88800962ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.695070][ T66] ffff888009630000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.695253][ T66] >ffff888009630080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.695447][ T66] ^ [ 11.695645][ T66] ffff888009630100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.695830][ T66] ffff888009630180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.696012][ T66] ================================================================== [ 11.696218][ T66] Disabling lock debugging due to kernel taint