[ 78.714034][ T942] ip (942) used greatest stack depth: 23280 bytes left [ 102.969652][ T1418] pm_nl_ctl (1418) used greatest stack depth: 21904 bytes left [ 133.158204][ T66] ================================================================== [ 133.158426][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 133.158627][ T66] Read of size 8 at addr ffff8880093e00f8 by task kworker/u16:1/66 [ 133.158808][ T66] [ 133.158874][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 133.159065][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 133.159232][ T66] Workqueue: netns cleanup_net [ 133.159367][ T66] Call Trace: [ 133.159463][ T66] [ 133.159541][ T66] dump_stack_lvl+0x82/0xd0 [ 133.159675][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 133.159841][ T66] ? cleanup_net+0x932/0xa40 [ 133.159973][ T66] print_report+0xb4/0x270 [ 133.160106][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 133.160232][ T66] kasan_report+0xbd/0xf0 [ 133.160335][ T66] ? cleanup_net+0x932/0xa40 [ 133.160471][ T66] cleanup_net+0x932/0xa40 [ 133.160599][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 133.160730][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 133.160857][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 133.160987][ T66] ? lock_acquire+0x32/0xc0 [ 133.161118][ T66] ? process_one_work+0xe0b/0x16d0 [ 133.161245][ T66] process_one_work+0xe55/0x16d0 [ 133.161373][ T66] ? __pfx___lock_release+0x10/0x10 [ 133.161498][ T66] ? __pfx_process_one_work+0x10/0x10 [ 133.161626][ T66] ? assign_work+0x16c/0x240 [ 133.161751][ T66] worker_thread+0x58c/0xce0 [ 133.161876][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 133.162040][ T66] ? __pfx_worker_thread+0x10/0x10 [ 133.162165][ T66] ? __pfx_worker_thread+0x10/0x10 [ 133.162291][ T66] kthread+0x28a/0x350 [ 133.162387][ T66] ? __pfx_kthread+0x10/0x10 [ 133.162511][ T66] ret_from_fork+0x31/0x70 [ 133.162636][ T66] ? __pfx_kthread+0x10/0x10 [ 133.162759][ T66] ret_from_fork_asm+0x1a/0x30 [ 133.162886][ T66] [ 133.162980][ T66] [ 133.163051][ T66] Allocated by task 240: [ 133.163147][ T66] kasan_save_stack+0x24/0x50 [ 133.163272][ T66] kasan_save_track+0x14/0x30 [ 133.163393][ T66] __kasan_slab_alloc+0x59/0x70 [ 133.163517][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 133.163639][ T66] copy_net_ns+0xc6/0x340 [ 133.163741][ T66] create_new_namespaces+0x35f/0x920 [ 133.163868][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 133.163990][ T66] ksys_unshare+0x2a9/0x660 [ 133.164120][ T66] __x64_sys_unshare+0x31/0x40 [ 133.164246][ T66] do_syscall_64+0xc1/0x1d0 [ 133.164375][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 133.164538][ T66] [ 133.164615][ T66] Freed by task 66: [ 133.164710][ T66] kasan_save_stack+0x24/0x50 [ 133.164843][ T66] kasan_save_track+0x14/0x30 [ 133.164974][ T66] kasan_save_free_info+0x3b/0x60 [ 133.165099][ T66] __kasan_slab_free+0x38/0x50 [ 133.165224][ T66] kmem_cache_free+0xf8/0x330 [ 133.165348][ T66] cleanup_net+0x5a8/0xa40 [ 133.165476][ T66] process_one_work+0xe55/0x16d0 [ 133.165602][ T66] worker_thread+0x58c/0xce0 [ 133.165728][ T66] kthread+0x28a/0x350 [ 133.165824][ T66] ret_from_fork+0x31/0x70 [ 133.165950][ T66] ret_from_fork_asm+0x1a/0x30 [ 133.166081][ T66] [ 133.166151][ T66] Last potentially related work creation: [ 133.166291][ T66] kasan_save_stack+0x24/0x50 [ 133.166428][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 133.166560][ T66] insert_work+0x34/0x230 [ 133.166658][ T66] __queue_work+0x5fd/0xa40 [ 133.166788][ T66] queue_delayed_work_on+0x8c/0xa0 [ 133.166920][ T66] __inet_insert_ifa+0x751/0xb10 [ 133.167053][ T66] inetdev_event+0xb18/0xcf0 [ 133.167177][ T66] notifier_call_chain+0xcd/0x150 [ 133.167309][ T66] __dev_notify_flags+0xe6/0x250 [ 133.167439][ T66] dev_change_flags+0xec/0x160 [ 133.167576][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 133.167712][ T66] rtnl_newlink+0x6de/0xa80 [ 133.167846][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 133.167975][ T66] netlink_rcv_skb+0x130/0x360 [ 133.168104][ T66] netlink_unicast+0x44b/0x710 [ 133.168234][ T66] netlink_sendmsg+0x723/0xbe0 [ 133.168363][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 133.168499][ T66] ___sys_sendmsg+0xee/0x170 [ 133.168635][ T66] __sys_sendmsg+0x109/0x1a0 [ 133.168766][ T66] do_syscall_64+0xc1/0x1d0 [ 133.168892][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 133.169048][ T66] [ 133.169115][ T66] The buggy address belongs to the object at ffff8880093e0040 [ 133.169115][ T66] which belongs to the cache net_namespace of size 6080 [ 133.169455][ T66] The buggy address is located 184 bytes inside of [ 133.169455][ T66] freed 6080-byte region [ffff8880093e0040, ffff8880093e1800) [ 133.169781][ T66] [ 133.169845][ T66] The buggy address belongs to the physical page: [ 133.170003][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880093e4c00 pfn:0x93e0 [ 133.170270][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 133.170461][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 133.170637][ T66] page_type: f5(slab) [ 133.170739][ T66] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 133.170976][ T66] raw: ffff8880093e4c00 0000000000050003 00000001f5000000 0000000000000000 [ 133.171210][ T66] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 133.171442][ T66] head: ffff8880093e4c00 0000000000050003 00000001f5000000 0000000000000000 [ 133.171668][ T66] head: 0080000000000003 ffffea000024f801 ffffffffffffffff 0000000000000000 [ 133.171888][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 133.172109][ T66] page dumped because: kasan: bad access detected [ 133.172270][ T66] [ 133.172333][ T66] Memory state around the buggy address: [ 133.172454][ T66] ffff8880093dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 133.172638][ T66] ffff8880093e0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 133.172818][ T66] >ffff8880093e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 133.173009][ T66] ^ [ 133.173191][ T66] ffff8880093e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 133.173447][ T66] ffff8880093e0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 133.173632][ T66] ================================================================== [ 133.173928][ T66] Disabling lock debugging due to kernel taint