[ 10.843276][ T258] ip (258) used greatest stack depth: 23984 bytes left [ 10.952301][ T259] ip (259) used greatest stack depth: 23152 bytes left [ 12.359303][ T67] ================================================================== [ 12.359532][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 12.359729][ T67] Read of size 8 at addr ffff888009e99bf8 by task kworker/u16:1/67 [ 12.359915][ T67] [ 12.359983][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 12.360193][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.360361][ T67] Workqueue: netns cleanup_net [ 12.360497][ T67] Call Trace: [ 12.360593][ T67] [ 12.360661][ T67] dump_stack_lvl+0x82/0xd0 [ 12.360792][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 12.360957][ T67] ? cleanup_net+0xa5d/0xb90 [ 12.361084][ T67] print_report+0xb4/0x270 [ 12.361211][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 12.361337][ T67] kasan_report+0xbd/0xf0 [ 12.361434][ T67] ? cleanup_net+0xa5d/0xb90 [ 12.361563][ T67] cleanup_net+0xa5d/0xb90 [ 12.361691][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 12.361824][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 12.361951][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 12.362092][ T67] ? lock_acquire+0x32/0xc0 [ 12.362221][ T67] ? process_one_work+0xe0b/0x16d0 [ 12.362355][ T67] process_one_work+0xe55/0x16d0 [ 12.362488][ T67] ? __pfx___lock_release+0x10/0x10 [ 12.362617][ T67] ? __pfx_process_one_work+0x10/0x10 [ 12.362748][ T67] ? assign_work+0x16c/0x240 [ 12.362880][ T67] worker_thread+0x58c/0xce0 [ 12.363013][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 12.363178][ T67] ? __pfx_worker_thread+0x10/0x10 [ 12.363311][ T67] ? __pfx_worker_thread+0x10/0x10 [ 12.363461][ T67] kthread+0x28a/0x350 [ 12.363560][ T67] ? __pfx_kthread+0x10/0x10 [ 12.363688][ T67] ret_from_fork+0x31/0x70 [ 12.363818][ T67] ? __pfx_kthread+0x10/0x10 [ 12.363944][ T67] ret_from_fork_asm+0x1a/0x30 [ 12.364078][ T67] [ 12.364173][ T67] [ 12.364237][ T67] Allocated by task 257: [ 12.364335][ T67] kasan_save_stack+0x24/0x50 [ 12.364466][ T67] kasan_save_track+0x14/0x30 [ 12.364590][ T67] __kasan_slab_alloc+0x59/0x70 [ 12.364725][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 12.364856][ T67] copy_net_ns+0xc6/0x540 [ 12.364953][ T67] create_new_namespaces+0x35f/0x920 [ 12.365079][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 12.365209][ T67] ksys_unshare+0x2c4/0x6e0 [ 12.365339][ T67] __x64_sys_unshare+0x31/0x40 [ 12.365465][ T67] do_syscall_64+0xc1/0x1d0 [ 12.365596][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.365755][ T67] [ 12.365820][ T67] Freed by task 67: [ 12.365917][ T67] kasan_save_stack+0x24/0x50 [ 12.366044][ T67] kasan_save_track+0x14/0x30 [ 12.366175][ T67] kasan_save_free_info+0x3b/0x60 [ 12.366302][ T67] __kasan_slab_free+0x38/0x50 [ 12.366428][ T67] kmem_cache_free+0xf8/0x330 [ 12.366553][ T67] cleanup_net+0x5a8/0xb90 [ 12.366681][ T67] process_one_work+0xe55/0x16d0 [ 12.366817][ T67] worker_thread+0x58c/0xce0 [ 12.366943][ T67] kthread+0x28a/0x350 [ 12.367038][ T67] ret_from_fork+0x31/0x70 [ 12.367166][ T67] ret_from_fork_asm+0x1a/0x30 [ 12.367292][ T67] [ 12.367358][ T67] Last potentially related work creation: [ 12.367483][ T67] kasan_save_stack+0x24/0x50 [ 12.367610][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 12.367737][ T67] insert_work+0x34/0x230 [ 12.367834][ T67] __queue_work+0x5fd/0xa40 [ 12.367961][ T67] queue_delayed_work_on+0x8c/0xa0 [ 12.368089][ T67] __inet_insert_ifa+0x751/0xb10 [ 12.368217][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 12.368347][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 12.368478][ T67] netlink_rcv_skb+0x130/0x360 [ 12.368608][ T67] netlink_unicast+0x44b/0x710 [ 12.368733][ T67] netlink_sendmsg+0x723/0xbe0 [ 12.368861][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 12.368990][ T67] ___sys_sendmsg+0xee/0x170 [ 12.369121][ T67] __sys_sendmsg+0x109/0x1a0 [ 12.369246][ T67] do_syscall_64+0xc1/0x1d0 [ 12.369374][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.369533][ T67] [ 12.369612][ T67] Second to last potentially related work creation: [ 12.369765][ T67] kasan_save_stack+0x24/0x50 [ 12.369891][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 12.370018][ T67] insert_work+0x34/0x230 [ 12.370113][ T67] __queue_work+0x5fd/0xa40 [ 12.370237][ T67] queue_delayed_work_on+0x8c/0xa0 [ 12.370364][ T67] __inet_insert_ifa+0x751/0xb10 [ 12.370493][ T67] inetdev_event+0xb18/0xcf0 [ 12.370619][ T67] notifier_call_chain+0xcd/0x150 [ 12.370748][ T67] __dev_notify_flags+0xe6/0x250 [ 12.370875][ T67] dev_change_flags+0xec/0x160 [ 12.371003][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 12.371134][ T67] rtnl_newlink+0x6de/0xa80 [ 12.371260][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 12.371386][ T67] netlink_rcv_skb+0x130/0x360 [ 12.371515][ T67] netlink_unicast+0x44b/0x710 [ 12.371640][ T67] netlink_sendmsg+0x723/0xbe0 [ 12.371766][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 12.371891][ T67] ___sys_sendmsg+0xee/0x170 [ 12.372020][ T67] __sys_sendmsg+0x109/0x1a0 [ 12.372149][ T67] do_syscall_64+0xc1/0x1d0 [ 12.372275][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.372434][ T67] [ 12.372498][ T67] The buggy address belongs to the object at ffff888009e99b40 [ 12.372498][ T67] which belongs to the cache net_namespace of size 6528 [ 12.372829][ T67] The buggy address is located 184 bytes inside of [ 12.372829][ T67] freed 6528-byte region [ffff888009e99b40, ffff888009e9b4c0) [ 12.373151][ T67] [ 12.373213][ T67] The buggy address belongs to the physical page: [ 12.373371][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009e9b640 pfn:0x9e98 [ 12.373638][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 12.373828][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 12.373990][ T67] page_type: f5(slab) [ 12.374099][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.374330][ T67] raw: ffff888009e9b640 0000000000040002 00000001f5000000 0000000000000000 [ 12.374556][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.374778][ T67] head: ffff888009e9b640 0000000000040002 00000001f5000000 0000000000000000 [ 12.375002][ T67] head: 0080000000000003 ffffea000027a601 ffffffffffffffff 0000000000000000 [ 12.375239][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 12.375458][ T67] page dumped because: kasan: bad access detected [ 12.375618][ T67] [ 12.375680][ T67] Memory state around the buggy address: [ 12.375802][ T67] ffff888009e99a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.375990][ T67] ffff888009e99b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 12.376179][ T67] >ffff888009e99b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.376361][ T67] ^ [ 12.376551][ T67] ffff888009e99c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.376730][ T67] ffff888009e99c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.376921][ T67] ================================================================== [ 12.377126][ T67] Disabling lock debugging due to kernel taint