[ 10.663517][ T11] ================================================================== [ 10.663824][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.664067][ T11] Read of size 8 at addr ffff88800b5080f8 by task kworker/u16:0/11 [ 10.664296][ T11] [ 10.664381][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 10.664626][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.664827][ T11] Workqueue: netns cleanup_net [ 10.665002][ T11] Call Trace: [ 10.665122][ T11] [ 10.665213][ T11] dump_stack_lvl+0x82/0xd0 [ 10.665378][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 10.665582][ T11] ? cleanup_net+0x932/0xa40 [ 10.665744][ T11] print_report+0xb4/0x270 [ 10.665905][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 10.666062][ T11] kasan_report+0xbd/0xf0 [ 10.666184][ T11] ? cleanup_net+0x932/0xa40 [ 10.666343][ T11] cleanup_net+0x932/0xa40 [ 10.666504][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.666679][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 10.666839][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 10.667003][ T11] ? lock_acquire+0x32/0xc0 [ 10.667170][ T11] ? process_one_work+0xe0b/0x16d0 [ 10.667338][ T11] process_one_work+0xe55/0x16d0 [ 10.667501][ T11] ? __pfx___lock_release+0x10/0x10 [ 10.667659][ T11] ? __pfx_process_one_work+0x10/0x10 [ 10.667826][ T11] ? assign_work+0x16c/0x240 [ 10.667984][ T11] worker_thread+0x58c/0xce0 [ 10.668144][ T11] ? __pfx_worker_thread+0x10/0x10 [ 10.668306][ T11] kthread+0x28a/0x350 [ 10.668429][ T11] ? __pfx_kthread+0x10/0x10 [ 10.668586][ T11] ret_from_fork+0x31/0x70 [ 10.668743][ T11] ? __pfx_kthread+0x10/0x10 [ 10.668900][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.669068][ T11] [ 10.669187][ T11] [ 10.669267][ T11] Allocated by task 227: [ 10.669386][ T11] kasan_save_stack+0x24/0x50 [ 10.669549][ T11] kasan_save_track+0x14/0x30 [ 10.669709][ T11] __kasan_slab_alloc+0x59/0x70 [ 10.669864][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.670025][ T11] copy_net_ns+0xc6/0x340 [ 10.670144][ T11] create_new_namespaces+0x35f/0x920 [ 10.670307][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.670465][ T11] ksys_unshare+0x2a9/0x660 [ 10.670625][ T11] __x64_sys_unshare+0x31/0x40 [ 10.670791][ T11] do_syscall_64+0xc1/0x1d0 [ 10.670951][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.671148][ T11] [ 10.671228][ T11] Freed by task 11: [ 10.671345][ T11] kasan_save_stack+0x24/0x50 [ 10.671504][ T11] kasan_save_track+0x14/0x30 [ 10.671663][ T11] kasan_save_free_info+0x3b/0x60 [ 10.671819][ T11] __kasan_slab_free+0x38/0x50 [ 10.671982][ T11] kmem_cache_free+0xf8/0x330 [ 10.672139][ T11] cleanup_net+0x5a8/0xa40 [ 10.672294][ T11] process_one_work+0xe55/0x16d0 [ 10.672451][ T11] worker_thread+0x58c/0xce0 [ 10.672606][ T11] kthread+0x28a/0x350 [ 10.672727][ T11] ret_from_fork+0x31/0x70 [ 10.672888][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.673043][ T11] [ 10.673124][ T11] The buggy address belongs to the object at ffff88800b508040 [ 10.673124][ T11] which belongs to the cache net_namespace of size 5696 [ 10.673538][ T11] The buggy address is located 184 bytes inside of [ 10.673538][ T11] freed 5696-byte region [ffff88800b508040, ffff88800b509680) [ 10.673912][ T11] [ 10.673993][ T11] The buggy address belongs to the physical page: [ 10.674186][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b50afc0 pfn:0xb508 [ 10.674505][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.674738][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.674961][ T11] page_type: f5(slab) [ 10.675060][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.675277][ T11] raw: ffff88800b50afc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.675498][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.675716][ T11] head: ffff88800b50afc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.675938][ T11] head: 0080000000000003 ffffea00002d4201 ffffffffffffffff 0000000000000000 [ 10.676158][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.676384][ T11] page dumped because: kasan: bad access detected [ 10.676540][ T11] [ 10.676601][ T11] Memory state around the buggy address: [ 10.676731][ T11] ffff88800b507f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.676911][ T11] ffff88800b508000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.677087][ T11] >ffff88800b508080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.677271][ T11] ^ [ 10.677449][ T11] ffff88800b508100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.677624][ T11] ffff88800b508180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.677800][ T11] ================================================================== [ 10.678010][ T11] Disabling lock debugging due to kernel taint [ 12.680764][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.681604][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.682360][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.683085][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.683994][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3