[ 15.800667][ T65] ================================================================== [ 15.800957][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 15.801151][ T65] Read of size 8 at addr ffff88800b2b80f8 by task kworker/u16:1/65 [ 15.801331][ T65] [ 15.801398][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 15.801607][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.801788][ T65] Workqueue: netns cleanup_net [ 15.801916][ T65] Call Trace: [ 15.802013][ T65] [ 15.802082][ T65] dump_stack_lvl+0x82/0xd0 [ 15.802212][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 15.802371][ T65] ? cleanup_net+0x932/0xa40 [ 15.802498][ T65] print_report+0xb4/0x270 [ 15.802624][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 15.802751][ T65] kasan_report+0xbd/0xf0 [ 15.802847][ T65] ? cleanup_net+0x932/0xa40 [ 15.802976][ T65] cleanup_net+0x932/0xa40 [ 15.803100][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.803229][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 15.803351][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 15.803480][ T65] ? lock_acquire+0x32/0xc0 [ 15.803604][ T65] ? process_one_work+0xe0b/0x16d0 [ 15.803736][ T65] process_one_work+0xe55/0x16d0 [ 15.803861][ T65] ? __pfx___lock_release+0x10/0x10 [ 15.803985][ T65] ? __pfx_process_one_work+0x10/0x10 [ 15.804114][ T65] ? assign_work+0x16c/0x240 [ 15.804238][ T65] worker_thread+0x58c/0xce0 [ 15.804364][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 15.804518][ T65] ? __pfx_worker_thread+0x10/0x10 [ 15.804642][ T65] ? __pfx_worker_thread+0x10/0x10 [ 15.804768][ T65] kthread+0x28a/0x350 [ 15.804864][ T65] ? __pfx_kthread+0x10/0x10 [ 15.804987][ T65] ret_from_fork+0x31/0x70 [ 15.805114][ T65] ? __pfx_kthread+0x10/0x10 [ 15.805238][ T65] ret_from_fork_asm+0x1a/0x30 [ 15.805367][ T65] [ 15.805462][ T65] [ 15.805524][ T65] Allocated by task 222: [ 15.805618][ T65] kasan_save_stack+0x24/0x50 [ 15.805747][ T65] kasan_save_track+0x14/0x30 [ 15.805871][ T65] __kasan_slab_alloc+0x59/0x70 [ 15.805992][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.806119][ T65] copy_net_ns+0xc6/0x340 [ 15.806211][ T65] create_new_namespaces+0x35f/0x920 [ 15.806340][ T65] unshare_nsproxy_namespaces+0x8d/0x130 [ 15.806465][ T65] ksys_unshare+0x2a9/0x660 [ 15.806591][ T65] __x64_sys_unshare+0x31/0x40 [ 15.806714][ T65] do_syscall_64+0xc1/0x1d0 [ 15.806840][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.806996][ T65] [ 15.807059][ T65] Freed by task 65: [ 15.807150][ T65] kasan_save_stack+0x24/0x50 [ 15.807276][ T65] kasan_save_track+0x14/0x30 [ 15.807396][ T65] kasan_save_free_info+0x3b/0x60 [ 15.807518][ T65] __kasan_slab_free+0x38/0x50 [ 15.807640][ T65] kmem_cache_free+0xf8/0x330 [ 15.807768][ T65] cleanup_net+0x5a8/0xa40 [ 15.807892][ T65] process_one_work+0xe55/0x16d0 [ 15.808015][ T65] worker_thread+0x58c/0xce0 [ 15.808136][ T65] kthread+0x28a/0x350 [ 15.808229][ T65] ret_from_fork+0x31/0x70 [ 15.808349][ T65] ret_from_fork_asm+0x1a/0x30 [ 15.808471][ T65] [ 15.808538][ T65] Last potentially related work creation: [ 15.808668][ T65] kasan_save_stack+0x24/0x50 [ 15.808795][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 15.808918][ T65] insert_work+0x34/0x230 [ 15.809016][ T65] __queue_work+0x5fd/0xa40 [ 15.809139][ T65] queue_delayed_work_on+0x8c/0xa0 [ 15.809266][ T65] __inet_insert_ifa+0x751/0xb10 [ 15.809392][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 15.809518][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 15.809643][ T65] netlink_rcv_skb+0x130/0x360 [ 15.809772][ T65] netlink_unicast+0x44b/0x710 [ 15.809897][ T65] netlink_sendmsg+0x723/0xbe0 [ 15.810019][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 15.810143][ T65] ___sys_sendmsg+0xee/0x170 [ 15.810269][ T65] __sys_sendmsg+0x109/0x1a0 [ 15.810411][ T65] do_syscall_64+0xc1/0x1d0 [ 15.810533][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.810691][ T65] [ 15.810755][ T65] The buggy address belongs to the object at ffff88800b2b8040 [ 15.810755][ T65] which belongs to the cache net_namespace of size 5696 [ 15.811127][ T65] The buggy address is located 184 bytes inside of [ 15.811127][ T65] freed 5696-byte region [ffff88800b2b8040, ffff88800b2b9680) [ 15.811455][ T65] [ 15.811527][ T65] The buggy address belongs to the physical page: [ 15.811691][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b2bafc0 pfn:0xb2b8 [ 15.811970][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.812177][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.812356][ T65] page_type: f5(slab) [ 15.812469][ T65] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 15.812712][ T65] raw: ffff88800b2bafc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.812955][ T65] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 15.813199][ T65] head: ffff88800b2bafc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.813439][ T65] head: 0080000000000003 ffffea00002cae01 ffffffffffffffff 0000000000000000 [ 15.813680][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.813920][ T65] page dumped because: kasan: bad access detected [ 15.814091][ T65] [ 15.814159][ T65] Memory state around the buggy address: [ 15.814294][ T65] ffff88800b2b7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.814497][ T65] ffff88800b2b8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.814698][ T65] >ffff88800b2b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.814899][ T65] ^ [ 15.815098][ T65] ffff88800b2b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.815295][ T65] ffff88800b2b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.815492][ T65] ================================================================== [ 15.815827][ T65] Disabling lock debugging due to kernel taint