[ 10.494194][ T11] ================================================================== [ 10.494535][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.494849][ T11] Read of size 8 at addr ffff8880024d80f8 by task kworker/u16:0/11 [ 10.495145][ T11] [ 10.495249][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 10.495566][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.495828][ T11] Workqueue: netns cleanup_net [ 10.496050][ T11] Call Trace: [ 10.496211][ T11] [ 10.496323][ T11] dump_stack_lvl+0x82/0xd0 [ 10.496550][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 10.496819][ T11] ? cleanup_net+0x932/0xa40 [ 10.497040][ T11] print_report+0xb4/0x270 [ 10.497257][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 10.497475][ T11] kasan_report+0xbd/0xf0 [ 10.497637][ T11] ? cleanup_net+0x932/0xa40 [ 10.497847][ T11] cleanup_net+0x932/0xa40 [ 10.498061][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.498280][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 10.498492][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 10.498706][ T11] ? lock_acquire+0x32/0xc0 [ 10.498918][ T11] ? process_one_work+0xe0b/0x16d0 [ 10.499135][ T11] process_one_work+0xe55/0x16d0 [ 10.499351][ T11] ? __pfx___lock_release+0x10/0x10 [ 10.499563][ T11] ? __pfx_process_one_work+0x10/0x10 [ 10.499781][ T11] ? assign_work+0x16c/0x240 [ 10.500004][ T11] worker_thread+0x58c/0xce0 [ 10.500223][ T11] ? __pfx_worker_thread+0x10/0x10 [ 10.500437][ T11] kthread+0x28a/0x350 [ 10.500614][ T11] ? __pfx_kthread+0x10/0x10 [ 10.500821][ T11] ret_from_fork+0x31/0x70 [ 10.501034][ T11] ? __pfx_kthread+0x10/0x10 [ 10.501243][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.501466][ T11] [ 10.501632][ T11] [ 10.501740][ T11] Allocated by task 227: [ 10.501898][ T11] kasan_save_stack+0x24/0x50 [ 10.502120][ T11] kasan_save_track+0x14/0x30 [ 10.502330][ T11] __kasan_slab_alloc+0x59/0x70 [ 10.502542][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.502757][ T11] copy_net_ns+0xc6/0x340 [ 10.502917][ T11] create_new_namespaces+0x35f/0x920 [ 10.503128][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.503341][ T11] ksys_unshare+0x2a9/0x660 [ 10.503560][ T11] __x64_sys_unshare+0x31/0x40 [ 10.503774][ T11] do_syscall_64+0xc1/0x1d0 [ 10.503984][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.504251][ T11] [ 10.504360][ T11] Freed by task 11: [ 10.504520][ T11] kasan_save_stack+0x24/0x50 [ 10.504736][ T11] kasan_save_track+0x14/0x30 [ 10.504949][ T11] kasan_save_free_info+0x3b/0x60 [ 10.505158][ T11] __kasan_slab_free+0x38/0x50 [ 10.505371][ T11] kmem_cache_free+0xf8/0x330 [ 10.505583][ T11] cleanup_net+0x5a8/0xa40 [ 10.505790][ T11] process_one_work+0xe55/0x16d0 [ 10.506001][ T11] worker_thread+0x58c/0xce0 [ 10.506212][ T11] kthread+0x28a/0x350 [ 10.506371][ T11] ret_from_fork+0x31/0x70 [ 10.506587][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.506795][ T11] [ 10.506904][ T11] The buggy address belongs to the object at ffff8880024d8040 [ 10.506904][ T11] which belongs to the cache net_namespace of size 5696 [ 10.507450][ T11] The buggy address is located 184 bytes inside of [ 10.507450][ T11] freed 5696-byte region [ffff8880024d8040, ffff8880024d9680) [ 10.507947][ T11] [ 10.508053][ T11] The buggy address belongs to the physical page: [ 10.508324][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880024dafc0 pfn:0x24d8 [ 10.508747][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.509058][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.509323][ T11] page_type: f5(slab) [ 10.509489][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.509867][ T11] raw: ffff8880024dafc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.510233][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.510625][ T11] head: ffff8880024dafc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.510992][ T11] head: 0080000000000003 ffffea0000093601 ffffffffffffffff 0000000000000000 [ 10.511370][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.511735][ T11] page dumped because: kasan: bad access detected [ 10.511986][ T11] [ 10.512090][ T11] Memory state around the buggy address: [ 10.512290][ T11] ffff8880024d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.512587][ T11] ffff8880024d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.512894][ T11] >ffff8880024d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.513192][ T11] ^ [ 10.513486][ T11] ffff8880024d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.513777][ T11] ffff8880024d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.514080][ T11] ================================================================== [ 10.514477][ T11] Disabling lock debugging due to kernel taint [ 14.877774][ C2] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK