[ 10.661433][ T66] ================================================================== [ 10.661691][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.661881][ T66] Read of size 8 at addr ffff8880051900f8 by task kworker/u16:1/66 [ 10.662062][ T66] [ 10.662135][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 10.662332][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.662500][ T66] Workqueue: netns cleanup_net [ 10.662644][ T66] Call Trace: [ 10.662739][ T66] [ 10.662805][ T66] dump_stack_lvl+0x82/0xd0 [ 10.662937][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 10.663105][ T66] ? cleanup_net+0x932/0xa40 [ 10.663243][ T66] print_report+0xb4/0x270 [ 10.663369][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 10.663494][ T66] kasan_report+0xbd/0xf0 [ 10.663600][ T66] ? cleanup_net+0x932/0xa40 [ 10.663727][ T66] cleanup_net+0x932/0xa40 [ 10.663854][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.663984][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 10.664109][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 10.664246][ T66] ? lock_acquire+0x32/0xc0 [ 10.664371][ T66] ? process_one_work+0xe0b/0x16d0 [ 10.664506][ T66] process_one_work+0xe55/0x16d0 [ 10.664631][ T66] ? __pfx___lock_release+0x10/0x10 [ 10.664765][ T66] ? __pfx_process_one_work+0x10/0x10 [ 10.664897][ T66] ? assign_work+0x16c/0x240 [ 10.665034][ T66] worker_thread+0x58c/0xce0 [ 10.665157][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.665322][ T66] ? __pfx_worker_thread+0x10/0x10 [ 10.665458][ T66] ? __pfx_worker_thread+0x10/0x10 [ 10.665590][ T66] kthread+0x28a/0x350 [ 10.665695][ T66] ? __pfx_kthread+0x10/0x10 [ 10.665821][ T66] ret_from_fork+0x31/0x70 [ 10.665970][ T66] ? __pfx_kthread+0x10/0x10 [ 10.666093][ T66] ret_from_fork_asm+0x1a/0x30 [ 10.666228][ T66] [ 10.666331][ T66] [ 10.666405][ T66] Allocated by task 227: [ 10.666501][ T66] kasan_save_stack+0x24/0x50 [ 10.666650][ T66] kasan_save_track+0x14/0x30 [ 10.666774][ T66] __kasan_slab_alloc+0x59/0x70 [ 10.666907][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.667041][ T66] copy_net_ns+0xc6/0x340 [ 10.667145][ T66] create_new_namespaces+0x35f/0x920 [ 10.667299][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.667450][ T66] ksys_unshare+0x2a9/0x660 [ 10.667609][ T66] __x64_sys_unshare+0x31/0x40 [ 10.667760][ T66] do_syscall_64+0xc1/0x1d0 [ 10.667908][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.668079][ T66] [ 10.668150][ T66] Freed by task 66: [ 10.668254][ T66] kasan_save_stack+0x24/0x50 [ 10.668409][ T66] kasan_save_track+0x14/0x30 [ 10.668547][ T66] kasan_save_free_info+0x3b/0x60 [ 10.668701][ T66] __kasan_slab_free+0x38/0x50 [ 10.668851][ T66] kmem_cache_free+0xf8/0x330 [ 10.668991][ T66] cleanup_net+0x5a8/0xa40 [ 10.669146][ T66] process_one_work+0xe55/0x16d0 [ 10.669296][ T66] worker_thread+0x58c/0xce0 [ 10.669435][ T66] kthread+0x28a/0x350 [ 10.669554][ T66] ret_from_fork+0x31/0x70 [ 10.669691][ T66] ret_from_fork_asm+0x1a/0x30 [ 10.669847][ T66] [ 10.669924][ T66] The buggy address belongs to the object at ffff888005190040 [ 10.669924][ T66] which belongs to the cache net_namespace of size 5696 [ 10.670323][ T66] The buggy address is located 184 bytes inside of [ 10.670323][ T66] freed 5696-byte region [ffff888005190040, ffff888005191680) [ 10.670658][ T66] [ 10.670727][ T66] The buggy address belongs to the physical page: [ 10.670909][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005192fc0 pfn:0x5190 [ 10.671186][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.671393][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.671582][ T66] page_type: f5(slab) [ 10.671706][ T66] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.671952][ T66] raw: ffff888005192fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.672194][ T66] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.672437][ T66] head: ffff888005192fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.672677][ T66] head: 0080000000000003 ffffea0000146401 ffffffffffffffff 0000000000000000 [ 10.672944][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.673192][ T66] page dumped because: kasan: bad access detected [ 10.673367][ T66] [ 10.673439][ T66] Memory state around the buggy address: [ 10.673579][ T66] ffff88800518ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.673810][ T66] ffff888005190000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.674008][ T66] >ffff888005190080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.674215][ T66] ^ [ 10.674419][ T66] ffff888005190100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.674619][ T66] ffff888005190180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.674820][ T66] ================================================================== [ 10.675058][ T66] Disabling lock debugging due to kernel taint [ 12.401876][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.402702][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.403753][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.404595][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.405454][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.535472][ T227] key-management_ (227) used greatest stack depth: 23856 bytes left