[ 28.985786][ T11] ================================================================== [ 28.986018][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 28.986223][ T11] Read of size 8 at addr ffff88800a2080f8 by task kworker/u16:0/11 [ 28.986412][ T11] [ 28.986479][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 28.986677][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 28.986836][ T11] Workqueue: netns cleanup_net [ 28.986969][ T11] Call Trace: [ 28.987066][ T11] [ 28.987138][ T11] dump_stack_lvl+0x82/0xd0 [ 28.987274][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 28.987434][ T11] ? cleanup_net+0xa5d/0xb90 [ 28.987562][ T11] print_report+0xb4/0x270 [ 28.987692][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 28.987820][ T11] kasan_report+0xbd/0xf0 [ 28.987917][ T11] ? cleanup_net+0xa5d/0xb90 [ 28.988045][ T11] cleanup_net+0xa5d/0xb90 [ 28.988169][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 28.988304][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 28.988427][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 28.988554][ T11] ? lock_acquire+0x32/0xc0 [ 28.988682][ T11] ? process_one_work+0xe0b/0x16d0 [ 28.988827][ T11] process_one_work+0xe55/0x16d0 [ 28.988956][ T11] ? __pfx___lock_release+0x10/0x10 [ 28.989081][ T11] ? __pfx_process_one_work+0x10/0x10 [ 28.989215][ T11] ? assign_work+0x16c/0x240 [ 28.989350][ T11] worker_thread+0x58c/0xce0 [ 28.989480][ T11] ? __pfx_worker_thread+0x10/0x10 [ 28.989606][ T11] kthread+0x28a/0x350 [ 28.989703][ T11] ? __pfx_kthread+0x10/0x10 [ 28.989833][ T11] ret_from_fork+0x31/0x70 [ 28.989960][ T11] ? __pfx_kthread+0x10/0x10 [ 28.990088][ T11] ret_from_fork_asm+0x1a/0x30 [ 28.990221][ T11] [ 28.990320][ T11] [ 28.990393][ T11] Allocated by task 272: [ 28.990492][ T11] kasan_save_stack+0x24/0x50 [ 28.990618][ T11] kasan_save_track+0x14/0x30 [ 28.990744][ T11] __kasan_slab_alloc+0x59/0x70 [ 28.990869][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 28.990997][ T11] copy_net_ns+0xc6/0x540 [ 28.991092][ T11] create_new_namespaces+0x35f/0x920 [ 28.991220][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 28.991349][ T11] ksys_unshare+0x2c4/0x6e0 [ 28.991475][ T11] __x64_sys_unshare+0x31/0x40 [ 28.991601][ T11] do_syscall_64+0xc1/0x1d0 [ 28.991729][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.991892][ T11] [ 28.991958][ T11] Freed by task 11: [ 28.992054][ T11] kasan_save_stack+0x24/0x50 [ 28.992184][ T11] kasan_save_track+0x14/0x30 [ 28.992309][ T11] kasan_save_free_info+0x3b/0x60 [ 28.992439][ T11] __kasan_slab_free+0x38/0x50 [ 28.992565][ T11] kmem_cache_free+0xf8/0x330 [ 28.992690][ T11] cleanup_net+0x5a8/0xb90 [ 28.992817][ T11] process_one_work+0xe55/0x16d0 [ 28.992944][ T11] worker_thread+0x58c/0xce0 [ 28.993071][ T11] kthread+0x28a/0x350 [ 28.993167][ T11] ret_from_fork+0x31/0x70 [ 28.993293][ T11] ret_from_fork_asm+0x1a/0x30 [ 28.993421][ T11] [ 28.993487][ T11] Last potentially related work creation: [ 28.993614][ T11] kasan_save_stack+0x24/0x50 [ 28.993742][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 28.993873][ T11] insert_work+0x34/0x230 [ 28.993971][ T11] __queue_work+0x5fd/0xa40 [ 28.994095][ T11] queue_delayed_work_on+0x8c/0xa0 [ 28.994223][ T11] __inet_insert_ifa+0x751/0xb10 [ 28.994353][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 28.994480][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 28.994611][ T11] netlink_rcv_skb+0x130/0x360 [ 28.994744][ T11] netlink_unicast+0x44b/0x710 [ 28.994871][ T11] netlink_sendmsg+0x723/0xbe0 [ 28.994998][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 28.995125][ T11] ___sys_sendmsg+0xee/0x170 [ 28.995252][ T11] __sys_sendmsg+0x109/0x1a0 [ 28.995380][ T11] do_syscall_64+0xc1/0x1d0 [ 28.995510][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.995667][ T11] [ 28.995735][ T11] Second to last potentially related work creation: [ 28.995889][ T11] kasan_save_stack+0x24/0x50 [ 28.996020][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 28.996151][ T11] insert_work+0x34/0x230 [ 28.996248][ T11] __queue_work+0x5fd/0xa40 [ 28.996374][ T11] queue_delayed_work_on+0x8c/0xa0 [ 28.996501][ T11] __inet_insert_ifa+0x751/0xb10 [ 28.996630][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 28.996756][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 28.996885][ T11] netlink_rcv_skb+0x130/0x360 [ 28.997014][ T11] netlink_unicast+0x44b/0x710 [ 28.997138][ T11] netlink_sendmsg+0x723/0xbe0 [ 28.997270][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 28.997400][ T11] ___sys_sendmsg+0xee/0x170 [ 28.997529][ T11] __sys_sendmsg+0x109/0x1a0 [ 28.997655][ T11] do_syscall_64+0xc1/0x1d0 [ 28.997781][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.997941][ T11] [ 28.998006][ T11] The buggy address belongs to the object at ffff88800a208040 [ 28.998006][ T11] which belongs to the cache net_namespace of size 6528 [ 28.998336][ T11] The buggy address is located 184 bytes inside of [ 28.998336][ T11] freed 6528-byte region [ffff88800a208040, ffff88800a2099c0) [ 28.998646][ T11] [ 28.998716][ T11] The buggy address belongs to the physical page: [ 28.998875][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a20b640 pfn:0xa208 [ 28.999138][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 28.999330][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 28.999491][ T11] page_type: f5(slab) [ 28.999595][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 28.999824][ T11] raw: ffff88800a20b640 0000000000040002 00000001f5000000 0000000000000000 [ 29.000054][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 29.000281][ T11] head: ffff88800a20b640 0000000000040002 00000001f5000000 0000000000000000 [ 29.000500][ T11] head: 0080000000000003 ffffea0000288201 ffffffffffffffff 0000000000000000 [ 29.000726][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 29.000950][ T11] page dumped because: kasan: bad access detected [ 29.001284][ T11] [ 29.001348][ T11] Memory state around the buggy address: [ 29.001471][ T11] ffff88800a207f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.001654][ T11] ffff88800a208000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.001833][ T11] >ffff88800a208080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.002019][ T11] ^ [ 29.002202][ T11] ffff88800a208100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.002387][ T11] ffff88800a208180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.002631][ T11] ================================================================== [ 29.002840][ T11] Disabling lock debugging due to kernel taint