[ 53.768877][ T1504] ip (1504) used greatest stack depth: 24384 bytes left [ 54.504245][ T1514] ip (1514) used greatest stack depth: 23568 bytes left [ 60.234886][ T11] ================================================================== [ 60.235195][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 60.235478][ T11] Read of size 8 at addr ffff888004e580f8 by task kworker/u16:0/11 [ 60.235746][ T11] [ 60.235840][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 60.236125][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 60.236318][ T11] Workqueue: netns cleanup_net [ 60.236454][ T11] Call Trace: [ 60.236549][ T11] [ 60.236649][ T11] dump_stack_lvl+0x82/0xd0 [ 60.236788][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 60.236948][ T11] ? cleanup_net+0x932/0xa40 [ 60.237092][ T11] print_report+0xb4/0x270 [ 60.237265][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 60.237390][ T11] kasan_report+0xbd/0xf0 [ 60.237518][ T11] ? cleanup_net+0x932/0xa40 [ 60.237654][ T11] cleanup_net+0x932/0xa40 [ 60.237781][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 60.237935][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 60.238080][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 60.238267][ T11] ? lock_acquire+0x32/0xc0 [ 60.238395][ T11] ? process_one_work+0xe0b/0x16d0 [ 60.238528][ T11] process_one_work+0xe55/0x16d0 [ 60.238690][ T11] ? __pfx___lock_release+0x10/0x10 [ 60.238819][ T11] ? __pfx_process_one_work+0x10/0x10 [ 60.238948][ T11] ? assign_work+0x16c/0x240 [ 60.239083][ T11] worker_thread+0x58c/0xce0 [ 60.239239][ T11] ? __pfx_worker_thread+0x10/0x10 [ 60.239367][ T11] kthread+0x28a/0x350 [ 60.239468][ T11] ? __pfx_kthread+0x10/0x10 [ 60.239627][ T11] ret_from_fork+0x31/0x70 [ 60.239753][ T11] ? __pfx_kthread+0x10/0x10 [ 60.239878][ T11] ret_from_fork_asm+0x1a/0x30 [ 60.240008][ T11] [ 60.240110][ T11] [ 60.240175][ T11] Allocated by task 238: [ 60.240297][ T11] kasan_save_stack+0x24/0x50 [ 60.240470][ T11] kasan_save_track+0x14/0x30 [ 60.240653][ T11] __kasan_slab_alloc+0x59/0x70 [ 60.240836][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 60.241025][ T11] copy_net_ns+0xc6/0x340 [ 60.241160][ T11] create_new_namespaces+0x35f/0x920 [ 60.241347][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 60.241540][ T11] ksys_unshare+0x2a9/0x660 [ 60.241730][ T11] __x64_sys_unshare+0x31/0x40 [ 60.241917][ T11] do_syscall_64+0xc1/0x1d0 [ 60.242098][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 60.242335][ T11] [ 60.242435][ T11] Freed by task 11: [ 60.242576][ T11] kasan_save_stack+0x24/0x50 [ 60.242770][ T11] kasan_save_track+0x14/0x30 [ 60.242961][ T11] kasan_save_free_info+0x3b/0x60 [ 60.243157][ T11] __kasan_slab_free+0x38/0x50 [ 60.243344][ T11] kmem_cache_free+0xf8/0x330 [ 60.243522][ T11] cleanup_net+0x5a8/0xa40 [ 60.243700][ T11] process_one_work+0xe55/0x16d0 [ 60.243881][ T11] worker_thread+0x58c/0xce0 [ 60.244055][ T11] kthread+0x28a/0x350 [ 60.244195][ T11] ret_from_fork+0x31/0x70 [ 60.244372][ T11] ret_from_fork_asm+0x1a/0x30 [ 60.244548][ T11] [ 60.244638][ T11] Last potentially related work creation: [ 60.244826][ T11] kasan_save_stack+0x24/0x50 [ 60.245009][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 60.245188][ T11] insert_work+0x34/0x230 [ 60.245332][ T11] __queue_work+0x5fd/0xa40 [ 60.245512][ T11] queue_delayed_work_on+0x8c/0xa0 [ 60.245700][ T11] __inet_insert_ifa+0x751/0xb10 [ 60.245886][ T11] inetdev_event+0xb18/0xcf0 [ 60.246073][ T11] notifier_call_chain+0xcd/0x150 [ 60.246258][ T11] __dev_notify_flags+0xe6/0x250 [ 60.246441][ T11] dev_change_flags+0xec/0x160 [ 60.246621][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 60.246807][ T11] rtnl_newlink+0x6de/0xa80 [ 60.246986][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 60.247164][ T11] netlink_rcv_skb+0x130/0x360 [ 60.247346][ T11] netlink_unicast+0x44b/0x710 [ 60.247527][ T11] netlink_sendmsg+0x723/0xbe0 [ 60.247704][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 60.247881][ T11] ___sys_sendmsg+0xee/0x170 [ 60.248066][ T11] __sys_sendmsg+0x109/0x1a0 [ 60.248257][ T11] do_syscall_64+0xc1/0x1d0 [ 60.248452][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 60.248690][ T11] [ 60.248790][ T11] The buggy address belongs to the object at ffff888004e58040 [ 60.248790][ T11] which belongs to the cache net_namespace of size 6080 [ 60.249267][ T11] The buggy address is located 184 bytes inside of [ 60.249267][ T11] freed 6080-byte region [ffff888004e58040, ffff888004e59800) [ 60.249686][ T11] [ 60.249785][ T11] The buggy address belongs to the physical page: [ 60.249993][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004e5cc00 pfn:0x4e58 [ 60.250351][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 60.250634][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 60.250877][ T11] page_type: f5(slab) [ 60.251025][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 60.251347][ T11] raw: ffff888004e5cc00 0000000000050003 00000001f5000000 0000000000000000 [ 60.251670][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 60.252016][ T11] head: ffff888004e5cc00 0000000000050003 00000001f5000000 0000000000000000 [ 60.252343][ T11] head: 0080000000000003 ffffea0000139601 ffffffffffffffff 0000000000000000 [ 60.252678][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 60.253005][ T11] page dumped because: kasan: bad access detected [ 60.253245][ T11] [ 60.253338][ T11] Memory state around the buggy address: [ 60.253515][ T11] ffff888004e57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.253749][ T11] ffff888004e58000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.253989][ T11] >ffff888004e58080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.254253][ T11] ^ [ 60.254524][ T11] ffff888004e58100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.254800][ T11] ffff888004e58180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.255063][ T11] ================================================================== [ 60.255322][ T11] Disabling lock debugging due to kernel taint [ 214.702999][ T4087] netem: version 1.3 [ 1379.272506][T20043] pm_nl_ctl (20043) used greatest stack depth: 22944 bytes left