[ 18.072765][ T11] ================================================================== [ 18.073062][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 18.073251][ T11] Read of size 8 at addr ffff88800b8a80f8 by task kworker/u16:0/11 [ 18.073433][ T11] [ 18.073501][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.073688][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.073843][ T11] Workqueue: netns cleanup_net [ 18.073975][ T11] Call Trace: [ 18.074070][ T11] [ 18.074137][ T11] dump_stack_lvl+0x82/0xd0 [ 18.074266][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.074423][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.074549][ T11] print_report+0xb4/0x270 [ 18.074672][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.074797][ T11] kasan_report+0xbd/0xf0 [ 18.074893][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.075018][ T11] cleanup_net+0xa5d/0xb90 [ 18.075143][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.075274][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.075398][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.075524][ T11] ? lock_acquire+0x32/0xc0 [ 18.075646][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.075774][ T11] process_one_work+0xe55/0x16d0 [ 18.075901][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.076027][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.076153][ T11] ? assign_work+0x16c/0x240 [ 18.076278][ T11] worker_thread+0x58c/0xce0 [ 18.076404][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.076528][ T11] kthread+0x28a/0x350 [ 18.076624][ T11] ? __pfx_kthread+0x10/0x10 [ 18.076749][ T11] ret_from_fork+0x31/0x70 [ 18.076875][ T11] ? __pfx_kthread+0x10/0x10 [ 18.076998][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.077127][ T11] [ 18.077221][ T11] [ 18.077285][ T11] Allocated by task 251: [ 18.077379][ T11] kasan_save_stack+0x24/0x50 [ 18.077506][ T11] kasan_save_track+0x14/0x30 [ 18.077628][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.077753][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.077880][ T11] copy_net_ns+0xc6/0x540 [ 18.077973][ T11] create_new_namespaces+0x35f/0x920 [ 18.078097][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 18.078224][ T11] ksys_unshare+0x2c4/0x6e0 [ 18.078350][ T11] __x64_sys_unshare+0x31/0x40 [ 18.078475][ T11] do_syscall_64+0xc1/0x1d0 [ 18.078601][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.078757][ T11] [ 18.078821][ T11] Freed by task 11: [ 18.078917][ T11] kasan_save_stack+0x24/0x50 [ 18.079075][ T11] kasan_save_track+0x14/0x30 [ 18.079198][ T11] kasan_save_free_info+0x3b/0x60 [ 18.079322][ T11] __kasan_slab_free+0x38/0x50 [ 18.079444][ T11] kmem_cache_free+0xf8/0x330 [ 18.079567][ T11] cleanup_net+0x5a8/0xb90 [ 18.079691][ T11] process_one_work+0xe55/0x16d0 [ 18.079814][ T11] worker_thread+0x58c/0xce0 [ 18.079936][ T11] kthread+0x28a/0x350 [ 18.080030][ T11] ret_from_fork+0x31/0x70 [ 18.080156][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.080281][ T11] [ 18.080348][ T11] Last potentially related work creation: [ 18.080472][ T11] kasan_save_stack+0x24/0x50 [ 18.080599][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.080726][ T11] insert_work+0x34/0x230 [ 18.080823][ T11] __queue_work+0x5fd/0xa40 [ 18.080947][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.081073][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.081200][ T11] inetdev_event+0xb18/0xcf0 [ 18.081327][ T11] notifier_call_chain+0xcd/0x150 [ 18.081452][ T11] __dev_notify_flags+0xe6/0x250 [ 18.081576][ T11] dev_change_flags+0xec/0x160 [ 18.081702][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 18.081831][ T11] rtnl_newlink+0x6de/0xa80 [ 18.081957][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.082080][ T11] netlink_rcv_skb+0x130/0x360 [ 18.082207][ T11] netlink_unicast+0x44b/0x710 [ 18.082332][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.082460][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.082588][ T11] ___sys_sendmsg+0xee/0x170 [ 18.082711][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.082846][ T11] do_syscall_64+0xc1/0x1d0 [ 18.082970][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.083127][ T11] [ 18.083190][ T11] The buggy address belongs to the object at ffff88800b8a8040 [ 18.083190][ T11] which belongs to the cache net_namespace of size 6528 [ 18.083524][ T11] The buggy address is located 184 bytes inside of [ 18.083524][ T11] freed 6528-byte region [ffff88800b8a8040, ffff88800b8a99c0) [ 18.083826][ T11] [ 18.083890][ T11] The buggy address belongs to the physical page: [ 18.084041][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b8ab640 pfn:0xb8a8 [ 18.084297][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.084489][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.084649][ T11] page_type: f5(slab) [ 18.084751][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 18.084975][ T11] raw: ffff88800b8ab640 0000000000040002 00000001f5000000 0000000000000000 [ 18.085195][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 18.085418][ T11] head: ffff88800b8ab640 0000000000040002 00000001f5000000 0000000000000000 [ 18.085635][ T11] head: 0080000000000003 ffffea00002e2a01 ffffffffffffffff 0000000000000000 [ 18.085858][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.086075][ T11] page dumped because: kasan: bad access detected [ 18.086227][ T11] [ 18.086293][ T11] Memory state around the buggy address: [ 18.086416][ T11] ffff88800b8a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.086596][ T11] ffff88800b8a8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.086776][ T11] >ffff88800b8a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.086957][ T11] ^ [ 18.087133][ T11] ffff88800b8a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.087315][ T11] ffff88800b8a8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.087494][ T11] ================================================================== [ 18.087731][ T11] Disabling lock debugging due to kernel taint [ 105.000036][ T246] perl (246) used greatest stack depth: 24360 bytes left