[ 15.087212][ T11] ================================================================== [ 15.087452][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 15.087666][ T11] Read of size 8 at addr ffff888012211bf8 by task kworker/u16:0/11 [ 15.087863][ T11] [ 15.087935][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 15.088146][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.088317][ T11] Workqueue: netns cleanup_net [ 15.088463][ T11] Call Trace: [ 15.088566][ T11] [ 15.088647][ T11] dump_stack_lvl+0x82/0xd0 [ 15.088791][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 15.088969][ T11] ? cleanup_net+0xa5d/0xb90 [ 15.089108][ T11] print_report+0xb4/0x270 [ 15.089246][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 15.089382][ T11] kasan_report+0xbd/0xf0 [ 15.089487][ T11] ? cleanup_net+0xa5d/0xb90 [ 15.089623][ T11] cleanup_net+0xa5d/0xb90 [ 15.089760][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.089902][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 15.090036][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 15.090174][ T11] ? lock_acquire+0x32/0xc0 [ 15.090310][ T11] ? process_one_work+0xe0b/0x16d0 [ 15.090450][ T11] process_one_work+0xe55/0x16d0 [ 15.090588][ T11] ? __pfx___lock_release+0x10/0x10 [ 15.090726][ T11] ? __pfx_process_one_work+0x10/0x10 [ 15.090861][ T11] ? assign_work+0x16c/0x240 [ 15.090999][ T11] worker_thread+0x58c/0xce0 [ 15.091140][ T11] ? __pfx_worker_thread+0x10/0x10 [ 15.091273][ T11] kthread+0x28a/0x350 [ 15.091378][ T11] ? __pfx_kthread+0x10/0x10 [ 15.091516][ T11] ret_from_fork+0x31/0x70 [ 15.091657][ T11] ? __pfx_kthread+0x10/0x10 [ 15.091794][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.091936][ T11] [ 15.092041][ T11] [ 15.092110][ T11] Allocated by task 254: [ 15.092214][ T11] kasan_save_stack+0x24/0x50 [ 15.092353][ T11] kasan_save_track+0x14/0x30 [ 15.092490][ T11] __kasan_slab_alloc+0x59/0x70 [ 15.092633][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.092780][ T11] copy_net_ns+0xc6/0x540 [ 15.092887][ T11] create_new_namespaces+0x35f/0x920 [ 15.093025][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 15.093162][ T11] ksys_unshare+0x2c4/0x6e0 [ 15.093300][ T11] __x64_sys_unshare+0x31/0x40 [ 15.093435][ T11] do_syscall_64+0xc1/0x1d0 [ 15.093573][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.093743][ T11] [ 15.093812][ T11] Freed by task 11: [ 15.093914][ T11] kasan_save_stack+0x24/0x50 [ 15.094049][ T11] kasan_save_track+0x14/0x30 [ 15.094186][ T11] kasan_save_free_info+0x3b/0x60 [ 15.094322][ T11] __kasan_slab_free+0x38/0x50 [ 15.094464][ T11] kmem_cache_free+0xf8/0x330 [ 15.094603][ T11] cleanup_net+0x5a8/0xb90 [ 15.094740][ T11] process_one_work+0xe55/0x16d0 [ 15.094874][ T11] worker_thread+0x58c/0xce0 [ 15.095010][ T11] kthread+0x28a/0x350 [ 15.095114][ T11] ret_from_fork+0x31/0x70 [ 15.095249][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.095384][ T11] [ 15.095455][ T11] Last potentially related work creation: [ 15.095590][ T11] kasan_save_stack+0x24/0x50 [ 15.095731][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 15.095868][ T11] insert_work+0x34/0x230 [ 15.095971][ T11] __queue_work+0x5fd/0xa40 [ 15.096108][ T11] queue_delayed_work_on+0x8c/0xa0 [ 15.096245][ T11] __inet_insert_ifa+0x751/0xb10 [ 15.096387][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 15.096523][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 15.096661][ T11] netlink_rcv_skb+0x130/0x360 [ 15.096800][ T11] netlink_unicast+0x44b/0x710 [ 15.096936][ T11] netlink_sendmsg+0x723/0xbe0 [ 15.097074][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 15.097211][ T11] ___sys_sendmsg+0xee/0x170 [ 15.097346][ T11] __sys_sendmsg+0x109/0x1a0 [ 15.097481][ T11] do_syscall_64+0xc1/0x1d0 [ 15.097622][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.097798][ T11] [ 15.097867][ T11] The buggy address belongs to the object at ffff888012211b40 [ 15.097867][ T11] which belongs to the cache net_namespace of size 6528 [ 15.098225][ T11] The buggy address is located 184 bytes inside of [ 15.098225][ T11] freed 6528-byte region [ffff888012211b40, ffff8880122134c0) [ 15.098555][ T11] [ 15.098637][ T11] The buggy address belongs to the physical page: [ 15.098804][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888012213640 pfn:0x12210 [ 15.099080][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.099288][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.099464][ T11] page_type: f5(slab) [ 15.099571][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.099817][ T11] raw: ffff888012213640 0000000000040002 00000001f5000000 0000000000000000 [ 15.100055][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.100295][ T11] head: ffff888012213640 0000000000040002 00000001f5000000 0000000000000000 [ 15.100533][ T11] head: 0080000000000003 ffffea0000488401 ffffffffffffffff 0000000000000000 [ 15.100772][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.101009][ T11] page dumped because: kasan: bad access detected [ 15.101173][ T11] [ 15.101240][ T11] Memory state around the buggy address: [ 15.101373][ T11] ffff888012211a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.101573][ T11] ffff888012211b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.101768][ T11] >ffff888012211b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.101966][ T11] ^ [ 15.102162][ T11] ffff888012211c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.102355][ T11] ffff888012211c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.102552][ T11] ================================================================== [ 15.102772][ T11] Disabling lock debugging due to kernel taint