[ 16.074377][ T11] ================================================================== [ 16.074609][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 16.074812][ T11] Read of size 8 at addr ffff88800d0380f8 by task kworker/u16:0/11 [ 16.075000][ T11] [ 16.075091][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 16.075300][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.075461][ T11] Workqueue: netns cleanup_net [ 16.075598][ T11] Call Trace: [ 16.075698][ T11] [ 16.075772][ T11] dump_stack_lvl+0x82/0xd0 [ 16.075945][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 16.076137][ T11] ? cleanup_net+0xa5d/0xb90 [ 16.076269][ T11] print_report+0xb4/0x270 [ 16.076428][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 16.076562][ T11] kasan_report+0xbd/0xf0 [ 16.076687][ T11] ? cleanup_net+0xa5d/0xb90 [ 16.076866][ T11] cleanup_net+0xa5d/0xb90 [ 16.077044][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.077219][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 16.077419][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 16.077549][ T11] ? lock_acquire+0x32/0xc0 [ 16.077719][ T11] ? process_one_work+0xe0b/0x16d0 [ 16.077909][ T11] process_one_work+0xe55/0x16d0 [ 16.078089][ T11] ? __pfx___lock_release+0x10/0x10 [ 16.078219][ T11] ? __pfx_process_one_work+0x10/0x10 [ 16.078353][ T11] ? assign_work+0x16c/0x240 [ 16.078485][ T11] worker_thread+0x58c/0xce0 [ 16.078616][ T11] ? __pfx_worker_thread+0x10/0x10 [ 16.078750][ T11] kthread+0x28a/0x350 [ 16.078859][ T11] ? __pfx_kthread+0x10/0x10 [ 16.078994][ T11] ret_from_fork+0x31/0x70 [ 16.079126][ T11] ? __pfx_kthread+0x10/0x10 [ 16.079289][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.079451][ T11] [ 16.079550][ T11] [ 16.079615][ T11] Allocated by task 262: [ 16.079729][ T11] kasan_save_stack+0x24/0x50 [ 16.079902][ T11] kasan_save_track+0x14/0x30 [ 16.080062][ T11] __kasan_slab_alloc+0x59/0x70 [ 16.080249][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.080431][ T11] copy_net_ns+0xc6/0x540 [ 16.080578][ T11] create_new_namespaces+0x35f/0x920 [ 16.080743][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 16.080926][ T11] ksys_unshare+0x2c4/0x6e0 [ 16.081062][ T11] __x64_sys_unshare+0x31/0x40 [ 16.081190][ T11] do_syscall_64+0xc1/0x1d0 [ 16.081320][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.081516][ T11] [ 16.081606][ T11] Freed by task 11: [ 16.081706][ T11] kasan_save_stack+0x24/0x50 [ 16.081877][ T11] kasan_save_track+0x14/0x30 [ 16.082013][ T11] kasan_save_free_info+0x3b/0x60 [ 16.082142][ T11] __kasan_slab_free+0x38/0x50 [ 16.082310][ T11] kmem_cache_free+0xf8/0x330 [ 16.082468][ T11] cleanup_net+0x5a8/0xb90 [ 16.082599][ T11] process_one_work+0xe55/0x16d0 [ 16.082760][ T11] worker_thread+0x58c/0xce0 [ 16.082899][ T11] kthread+0x28a/0x350 [ 16.083033][ T11] ret_from_fork+0x31/0x70 [ 16.083159][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.083293][ T11] [ 16.083364][ T11] Last potentially related work creation: [ 16.083526][ T11] kasan_save_stack+0x24/0x50 [ 16.083661][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.083802][ T11] insert_work+0x34/0x230 [ 16.083904][ T11] __queue_work+0x5fd/0xa40 [ 16.084062][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.084193][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.084325][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 16.084454][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.084620][ T11] netlink_rcv_skb+0x130/0x360 [ 16.084752][ T11] netlink_unicast+0x44b/0x710 [ 16.084894][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.085023][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.085164][ T11] ___sys_sendmsg+0xee/0x170 [ 16.085312][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.085473][ T11] do_syscall_64+0xc1/0x1d0 [ 16.085615][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.085828][ T11] [ 16.085928][ T11] Second to last potentially related work creation: [ 16.086104][ T11] kasan_save_stack+0x24/0x50 [ 16.086239][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.086377][ T11] insert_work+0x34/0x230 [ 16.086504][ T11] __queue_work+0x5fd/0xa40 [ 16.086633][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.086796][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.086928][ T11] inetdev_event+0xb18/0xcf0 [ 16.087063][ T11] notifier_call_chain+0xcd/0x150 [ 16.087224][ T11] __dev_notify_flags+0xe6/0x250 [ 16.087357][ T11] dev_change_flags+0xec/0x160 [ 16.087519][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 16.087666][ T11] rtnl_newlink+0x6de/0xa80 [ 16.087831][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.087962][ T11] netlink_rcv_skb+0x130/0x360 [ 16.088097][ T11] netlink_unicast+0x44b/0x710 [ 16.088233][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.088375][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.088537][ T11] ___sys_sendmsg+0xee/0x170 [ 16.088673][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.088849][ T11] do_syscall_64+0xc1/0x1d0 [ 16.088979][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.089175][ T11] [ 16.089241][ T11] The buggy address belongs to the object at ffff88800d038040 [ 16.089241][ T11] which belongs to the cache net_namespace of size 6528 [ 16.089647][ T11] The buggy address is located 184 bytes inside of [ 16.089647][ T11] freed 6528-byte region [ffff88800d038040, ffff88800d0399c0) [ 16.089970][ T11] [ 16.090036][ T11] The buggy address belongs to the physical page: [ 16.090194][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800d03b640 pfn:0xd038 [ 16.090462][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.090663][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.090836][ T11] page_type: f5(slab) [ 16.090962][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 16.091207][ T11] raw: ffff88800d03b640 0000000000040002 00000001f5000000 0000000000000000 [ 16.091477][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 16.091712][ T11] head: ffff88800d03b640 0000000000040002 00000001f5000000 0000000000000000 [ 16.091946][ T11] head: 0080000000000003 ffffea0000340e01 ffffffffffffffff 0000000000000000 [ 16.092173][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.092404][ T11] page dumped because: kasan: bad access detected [ 16.092563][ T11] [ 16.092629][ T11] Memory state around the buggy address: [ 16.092758][ T11] ffff88800d037f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.092962][ T11] ffff88800d038000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.093148][ T11] >ffff88800d038080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.093340][ T11] ^ [ 16.093550][ T11] ffff88800d038100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.093791][ T11] ffff88800d038180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.094069][ T11] ================================================================== [ 16.094391][ T11] Disabling lock debugging due to kernel taint [ 48.752603][ T869] IPv6: Can't replace route, no match found [ 50.951089][ T939] IPv6: Can't replace route, no match found [ 93.082003][ T1855] Mirror/redirect action on [ 180.908711][ T2483] veth2: entered promiscuous mode [ 180.938031][ T2483] veth2: left promiscuous mode