[ 13.638874][ T11] ================================================================== [ 13.639178][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.639374][ T11] Read of size 8 at addr ffff88800e5e80f8 by task kworker/u16:0/11 [ 13.639567][ T11] [ 13.639637][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.639833][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.639999][ T11] Workqueue: netns cleanup_net [ 13.640139][ T11] Call Trace: [ 13.640241][ T11] [ 13.640315][ T11] dump_stack_lvl+0x82/0xd0 [ 13.640451][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.640618][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.640761][ T11] print_report+0xb4/0x270 [ 13.640892][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.641028][ T11] kasan_report+0xbd/0xf0 [ 13.641129][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.641265][ T11] cleanup_net+0xa5d/0xb90 [ 13.641398][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.641537][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.641673][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.641807][ T11] ? lock_acquire+0x32/0xc0 [ 13.641937][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.642067][ T11] process_one_work+0xe55/0x16d0 [ 13.642192][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.642320][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.642448][ T11] ? assign_work+0x16c/0x240 [ 13.642579][ T11] worker_thread+0x58c/0xce0 [ 13.642707][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.642832][ T11] kthread+0x28a/0x350 [ 13.642928][ T11] ? __pfx_kthread+0x10/0x10 [ 13.643052][ T11] ret_from_fork+0x31/0x70 [ 13.643177][ T11] ? __pfx_kthread+0x10/0x10 [ 13.643300][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.643427][ T11] [ 13.643520][ T11] [ 13.643588][ T11] Allocated by task 255: [ 13.643683][ T11] kasan_save_stack+0x24/0x50 [ 13.643810][ T11] kasan_save_track+0x14/0x30 [ 13.643933][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.644055][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.644181][ T11] copy_net_ns+0xc6/0x540 [ 13.644276][ T11] create_new_namespaces+0x35f/0x920 [ 13.644403][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.644528][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.644655][ T11] __x64_sys_unshare+0x31/0x40 [ 13.644784][ T11] do_syscall_64+0xc1/0x1d0 [ 13.644911][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.645066][ T11] [ 13.645130][ T11] Freed by task 11: [ 13.645223][ T11] kasan_save_stack+0x24/0x50 [ 13.645349][ T11] kasan_save_track+0x14/0x30 [ 13.645473][ T11] kasan_save_free_info+0x3b/0x60 [ 13.645603][ T11] __kasan_slab_free+0x38/0x50 [ 13.645730][ T11] kmem_cache_free+0xf8/0x330 [ 13.645852][ T11] cleanup_net+0x5a8/0xb90 [ 13.645978][ T11] process_one_work+0xe55/0x16d0 [ 13.646102][ T11] worker_thread+0x58c/0xce0 [ 13.646225][ T11] kthread+0x28a/0x350 [ 13.646318][ T11] ret_from_fork+0x31/0x70 [ 13.646439][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.646562][ T11] [ 13.646627][ T11] Last potentially related work creation: [ 13.646752][ T11] kasan_save_stack+0x24/0x50 [ 13.646878][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.647002][ T11] insert_work+0x34/0x230 [ 13.647097][ T11] __queue_work+0x5fd/0xa40 [ 13.647221][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.647343][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.647470][ T11] inetdev_event+0xb18/0xcf0 [ 13.647596][ T11] notifier_call_chain+0xcd/0x150 [ 13.647720][ T11] __dev_notify_flags+0xe6/0x250 [ 13.647843][ T11] dev_change_flags+0xec/0x160 [ 13.647966][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.648093][ T11] rtnl_newlink+0x6de/0xa80 [ 13.648216][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.648339][ T11] netlink_rcv_skb+0x130/0x360 [ 13.648466][ T11] netlink_unicast+0x44b/0x710 [ 13.648592][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.648717][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.648840][ T11] ___sys_sendmsg+0xee/0x170 [ 13.648966][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.649091][ T11] do_syscall_64+0xc1/0x1d0 [ 13.649216][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.649371][ T11] [ 13.649436][ T11] The buggy address belongs to the object at ffff88800e5e8040 [ 13.649436][ T11] which belongs to the cache net_namespace of size 6528 [ 13.649762][ T11] The buggy address is located 184 bytes inside of [ 13.649762][ T11] freed 6528-byte region [ffff88800e5e8040, ffff88800e5e99c0) [ 13.650059][ T11] [ 13.650122][ T11] The buggy address belongs to the physical page: [ 13.650272][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e5eb640 pfn:0xe5e8 [ 13.650521][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.650714][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.650875][ T11] page_type: f5(slab) [ 13.650972][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.651191][ T11] raw: ffff88800e5eb640 0000000000040002 00000001f5000000 0000000000000000 [ 13.651406][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.651623][ T11] head: ffff88800e5eb640 0000000000040002 00000001f5000000 0000000000000000 [ 13.651841][ T11] head: 0080000000000003 ffffea0000397a01 ffffffffffffffff 0000000000000000 [ 13.652057][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.652270][ T11] page dumped because: kasan: bad access detected [ 13.652420][ T11] [ 13.652481][ T11] Memory state around the buggy address: [ 13.652604][ T11] ffff88800e5e7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 13.652783][ T11] ffff88800e5e8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.652958][ T11] >ffff88800e5e8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.653135][ T11] ^ [ 13.653311][ T11] ffff88800e5e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.653490][ T11] ffff88800e5e8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.653664][ T11] ================================================================== [ 13.653926][ T11] Disabling lock debugging due to kernel taint [ 13.756693][ T191] make (191) used greatest stack depth: 24152 bytes left