[ 91.656302][ T68] ================================================================== [ 91.656533][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 91.656740][ T68] Read of size 8 at addr ffff88800c5e00f8 by task kworker/u16:1/68 [ 91.656924][ T68] [ 91.656990][ T68] CPU: 3 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 91.657189][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 91.657349][ T68] Workqueue: netns cleanup_net [ 91.657486][ T68] Call Trace: [ 91.657586][ T68] [ 91.657655][ T68] dump_stack_lvl+0x82/0xd0 [ 91.657790][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 91.657952][ T68] ? cleanup_net+0xa5d/0xb90 [ 91.658086][ T68] print_report+0xb4/0x270 [ 91.658217][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 91.658342][ T68] kasan_report+0xbd/0xf0 [ 91.658439][ T68] ? cleanup_net+0xa5d/0xb90 [ 91.658569][ T68] cleanup_net+0xa5d/0xb90 [ 91.658697][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 91.658845][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 91.658977][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 91.659107][ T68] ? lock_acquire+0x32/0xc0 [ 91.659238][ T68] ? process_one_work+0xe0b/0x16d0 [ 91.659369][ T68] process_one_work+0xe55/0x16d0 [ 91.659501][ T68] ? __pfx___lock_release+0x10/0x10 [ 91.659632][ T68] ? __pfx_process_one_work+0x10/0x10 [ 91.659763][ T68] ? assign_work+0x16c/0x240 [ 91.659893][ T68] worker_thread+0x58c/0xce0 [ 91.660027][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 91.660188][ T68] ? __pfx_worker_thread+0x10/0x10 [ 91.660316][ T68] ? __pfx_worker_thread+0x10/0x10 [ 91.660452][ T68] kthread+0x28a/0x350 [ 91.660551][ T68] ? __pfx_kthread+0x10/0x10 [ 91.660682][ T68] ret_from_fork+0x31/0x70 [ 91.660814][ T68] ? __pfx_kthread+0x10/0x10 [ 91.660940][ T68] ret_from_fork_asm+0x1a/0x30 [ 91.661075][ T68] [ 91.661176][ T68] [ 91.661240][ T68] Allocated by task 260: [ 91.661338][ T68] kasan_save_stack+0x24/0x50 [ 91.661469][ T68] kasan_save_track+0x14/0x30 [ 91.661597][ T68] __kasan_slab_alloc+0x59/0x70 [ 91.661724][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 91.661857][ T68] copy_net_ns+0xc6/0x540 [ 91.661949][ T68] create_new_namespaces+0x35f/0x920 [ 91.662079][ T68] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 91.662210][ T68] ksys_unshare+0x2c4/0x6e0 [ 91.662344][ T68] __x64_sys_unshare+0x31/0x40 [ 91.662476][ T68] do_syscall_64+0xc1/0x1d0 [ 91.662616][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.662773][ T68] [ 91.662842][ T68] Freed by task 68: [ 91.662937][ T68] kasan_save_stack+0x24/0x50 [ 91.663065][ T68] kasan_save_track+0x14/0x30 [ 91.663190][ T68] kasan_save_free_info+0x3b/0x60 [ 91.663327][ T68] __kasan_slab_free+0x38/0x50 [ 91.663455][ T68] kmem_cache_free+0xf8/0x330 [ 91.663583][ T68] cleanup_net+0x5a8/0xb90 [ 91.663707][ T68] process_one_work+0xe55/0x16d0 [ 91.663838][ T68] worker_thread+0x58c/0xce0 [ 91.663966][ T68] kthread+0x28a/0x350 [ 91.664067][ T68] ret_from_fork+0x31/0x70 [ 91.664190][ T68] ret_from_fork_asm+0x1a/0x30 [ 91.664320][ T68] [ 91.664386][ T68] Last potentially related work creation: [ 91.664511][ T68] kasan_save_stack+0x24/0x50 [ 91.664665][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 91.664818][ T68] insert_work+0x34/0x230 [ 91.664912][ T68] __queue_work+0x5fd/0xa40 [ 91.665040][ T68] queue_delayed_work_on+0x8c/0xa0 [ 91.665176][ T68] __inet_insert_ifa+0x751/0xb10 [ 91.665314][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 91.665444][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 91.665574][ T68] netlink_rcv_skb+0x130/0x360 [ 91.665708][ T68] netlink_unicast+0x44b/0x710 [ 91.665849][ T68] netlink_sendmsg+0x723/0xbe0 [ 91.665979][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 91.666118][ T68] ___sys_sendmsg+0xee/0x170 [ 91.666247][ T68] __sys_sendmsg+0x109/0x1a0 [ 91.666377][ T68] do_syscall_64+0xc1/0x1d0 [ 91.666507][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.666665][ T68] [ 91.666735][ T68] Second to last potentially related work creation: [ 91.666893][ T68] kasan_save_stack+0x24/0x50 [ 91.667023][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 91.667155][ T68] insert_work+0x34/0x230 [ 91.667252][ T68] __queue_work+0x5fd/0xa40 [ 91.667387][ T68] queue_delayed_work_on+0x8c/0xa0 [ 91.667515][ T68] __inet_insert_ifa+0x751/0xb10 [ 91.667648][ T68] inetdev_event+0xb18/0xcf0 [ 91.667773][ T68] notifier_call_chain+0xcd/0x150 [ 91.667899][ T68] __dev_notify_flags+0xe6/0x250 [ 91.668027][ T68] dev_change_flags+0xec/0x160 [ 91.668152][ T68] do_setlink.constprop.0+0x79d/0x2300 [ 91.668279][ T68] rtnl_newlink+0x6de/0xa80 [ 91.668402][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 91.668536][ T68] netlink_rcv_skb+0x130/0x360 [ 91.668669][ T68] netlink_unicast+0x44b/0x710 [ 91.668812][ T68] netlink_sendmsg+0x723/0xbe0 [ 91.668943][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 91.669073][ T68] ___sys_sendmsg+0xee/0x170 [ 91.669206][ T68] __sys_sendmsg+0x109/0x1a0 [ 91.669342][ T68] do_syscall_64+0xc1/0x1d0 [ 91.669472][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.669636][ T68] [ 91.669703][ T68] The buggy address belongs to the object at ffff88800c5e0040 [ 91.669703][ T68] which belongs to the cache net_namespace of size 6528 [ 91.670054][ T68] The buggy address is located 184 bytes inside of [ 91.670054][ T68] freed 6528-byte region [ffff88800c5e0040, ffff88800c5e19c0) [ 91.670389][ T68] [ 91.670456][ T68] The buggy address belongs to the physical page: [ 91.670626][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5e0 [ 91.670852][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 91.671049][ T68] flags: 0x80000000000040(head|node=0|zone=1) [ 91.671218][ T68] page_type: f5(slab) [ 91.671319][ T68] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffffea0000310610 [ 91.671548][ T68] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 91.671779][ T68] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffffea0000310610 [ 91.672010][ T68] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 91.672240][ T68] head: 0080000000000003 ffffea0000317801 ffffffffffffffff 0000000000000000 [ 91.672466][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 91.672694][ T68] page dumped because: kasan: bad access detected [ 91.672854][ T68] [ 91.672918][ T68] Memory state around the buggy address: [ 91.673050][ T68] ffff88800c5dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 91.673254][ T68] ffff88800c5e0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 91.673432][ T68] >ffff88800c5e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.673611][ T68] ^ [ 91.673790][ T68] ffff88800c5e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.673977][ T68] ffff88800c5e0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.674161][ T68] ================================================================== [ 91.674360][ T68] Disabling lock debugging due to kernel taint [ 94.170474][ T707] veth0: renamed from veth-rt-1 [ 94.725719][ T715] veth0: renamed from veth-rt-2