[ 53.841058][ T66] ================================================================== [ 53.841400][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 53.841713][ T66] Read of size 8 at addr ffff88800a1d80f8 by task kworker/u16:1/66 [ 53.842004][ T66] [ 53.842111][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 53.842425][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 53.842676][ T66] Workqueue: netns cleanup_net [ 53.842888][ T66] Call Trace: [ 53.843041][ T66] [ 53.843153][ T66] dump_stack_lvl+0x82/0xd0 [ 53.843364][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 53.843623][ T66] ? cleanup_net+0x932/0xa40 [ 53.843833][ T66] print_report+0xb4/0x270 [ 53.844045][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 53.844256][ T66] kasan_report+0xbd/0xf0 [ 53.844429][ T66] ? cleanup_net+0x932/0xa40 [ 53.844645][ T66] cleanup_net+0x932/0xa40 [ 53.844856][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.845074][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 53.845277][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 53.845490][ T66] ? lock_acquire+0x32/0xc0 [ 53.845691][ T66] ? process_one_work+0xe0b/0x16d0 [ 53.845898][ T66] process_one_work+0xe55/0x16d0 [ 53.846110][ T66] ? __pfx___lock_release+0x10/0x10 [ 53.846320][ T66] ? __pfx_process_one_work+0x10/0x10 [ 53.846530][ T66] ? assign_work+0x16c/0x240 [ 53.846730][ T66] worker_thread+0x58c/0xce0 [ 53.846934][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 53.847201][ T66] ? __pfx_worker_thread+0x10/0x10 [ 53.847412][ T66] ? __pfx_worker_thread+0x10/0x10 [ 53.847617][ T66] kthread+0x28a/0x350 [ 53.847775][ T66] ? __pfx_kthread+0x10/0x10 [ 53.847990][ T66] ret_from_fork+0x31/0x70 [ 53.848198][ T66] ? __pfx_kthread+0x10/0x10 [ 53.848404][ T66] ret_from_fork_asm+0x1a/0x30 [ 53.848622][ T66] [ 53.848782][ T66] [ 53.848891][ T66] Allocated by task 850: [ 53.849047][ T66] kasan_save_stack+0x24/0x50 [ 53.849260][ T66] kasan_save_track+0x14/0x30 [ 53.849467][ T66] __kasan_slab_alloc+0x59/0x70 [ 53.849675][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 53.849880][ T66] copy_net_ns+0xc6/0x340 [ 53.850037][ T66] create_new_namespaces+0x35f/0x920 [ 53.850237][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 53.850438][ T66] ksys_unshare+0x2a9/0x660 [ 53.850635][ T66] __x64_sys_unshare+0x31/0x40 [ 53.850829][ T66] do_syscall_64+0xc1/0x1d0 [ 53.851026][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.851274][ T66] [ 53.851376][ T66] Freed by task 66: [ 53.851524][ T66] kasan_save_stack+0x24/0x50 [ 53.851725][ T66] kasan_save_track+0x14/0x30 [ 53.851937][ T66] kasan_save_free_info+0x3b/0x60 [ 53.852149][ T66] __kasan_slab_free+0x38/0x50 [ 53.852363][ T66] kmem_cache_free+0xf8/0x330 [ 53.852573][ T66] cleanup_net+0x5a8/0xa40 [ 53.852789][ T66] process_one_work+0xe55/0x16d0 [ 53.853003][ T66] worker_thread+0x58c/0xce0 [ 53.853209][ T66] kthread+0x28a/0x350 [ 53.853367][ T66] ret_from_fork+0x31/0x70 [ 53.853577][ T66] ret_from_fork_asm+0x1a/0x30 [ 53.853793][ T66] [ 53.853905][ T66] Last potentially related work creation: [ 53.854129][ T66] kasan_save_stack+0x24/0x50 [ 53.854351][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 53.854618][ T66] insert_work+0x34/0x230 [ 53.854733][ T66] __queue_work+0x5fd/0xa40 [ 53.854876][ T66] queue_delayed_work_on+0x8c/0xa0 [ 53.855029][ T66] __inet_insert_ifa+0x751/0xb10 [ 53.855187][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 53.855343][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 53.855496][ T66] netlink_rcv_skb+0x130/0x360 [ 53.855679][ T66] netlink_unicast+0x44b/0x710 [ 53.855833][ T66] netlink_sendmsg+0x723/0xbe0 [ 53.855987][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 53.856138][ T66] ___sys_sendmsg+0xee/0x170 [ 53.856290][ T66] __sys_sendmsg+0x109/0x1a0 [ 53.856444][ T66] do_syscall_64+0xc1/0x1d0 [ 53.856607][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.856801][ T66] [ 53.856881][ T66] The buggy address belongs to the object at ffff88800a1d8040 [ 53.856881][ T66] which belongs to the cache net_namespace of size 5696 [ 53.857282][ T66] The buggy address is located 184 bytes inside of [ 53.857282][ T66] freed 5696-byte region [ffff88800a1d8040, ffff88800a1d9680) [ 53.857640][ T66] [ 53.857719][ T66] The buggy address belongs to the physical page: [ 53.857908][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a1dc780 pfn:0xa1d8 [ 53.858224][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 53.858462][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 53.858670][ T66] page_type: f5(slab) [ 53.858792][ T66] raw: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 53.859062][ T66] raw: ffff88800a1dc780 0000000000050003 00000001f5000000 0000000000000000 [ 53.859321][ T66] head: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 53.859597][ T66] head: ffff88800a1dc780 0000000000050003 00000001f5000000 0000000000000000 [ 53.859862][ T66] head: 0080000000000003 ffffea0000287601 ffffffffffffffff 0000000000000000 [ 53.860123][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 53.860391][ T66] page dumped because: kasan: bad access detected [ 53.860583][ T66] [ 53.860651][ T66] Memory state around the buggy address: [ 53.860800][ T66] ffff88800a1d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.861021][ T66] ffff88800a1d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 53.861242][ T66] >ffff88800a1d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.861468][ T66] ^ [ 53.861695][ T66] ffff88800a1d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.861915][ T66] ffff88800a1d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.862132][ T66] ================================================================== [ 53.862392][ T66] Disabling lock debugging due to kernel taint