[ 17.177661][ T358] Initializing XFRM netlink socket [ 547.194676][ T11] ================================================================== [ 547.194895][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 547.195083][ T11] Read of size 8 at addr ffff8880096580f8 by task kworker/u16:0/11 [ 547.195267][ T11] [ 547.195333][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 547.195525][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 547.195686][ T11] Workqueue: netns cleanup_net [ 547.195824][ T11] Call Trace: [ 547.195921][ T11] [ 547.195990][ T11] dump_stack_lvl+0x82/0xd0 [ 547.196121][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 547.196285][ T11] ? cleanup_net+0xa5d/0xb90 [ 547.196414][ T11] print_report+0xb4/0x270 [ 547.196536][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 547.196664][ T11] kasan_report+0xbd/0xf0 [ 547.196759][ T11] ? cleanup_net+0xa5d/0xb90 [ 547.196884][ T11] cleanup_net+0xa5d/0xb90 [ 547.197004][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 547.197134][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 547.197261][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 547.197385][ T11] ? lock_acquire+0x32/0xc0 [ 547.197510][ T11] ? process_one_work+0xe0b/0x16d0 [ 547.197637][ T11] process_one_work+0xe55/0x16d0 [ 547.197764][ T11] ? __pfx___lock_release+0x10/0x10 [ 547.197887][ T11] ? __pfx_process_one_work+0x10/0x10 [ 547.198009][ T11] ? assign_work+0x16c/0x240 [ 547.198132][ T11] worker_thread+0x58c/0xce0 [ 547.198256][ T11] ? __pfx_worker_thread+0x10/0x10 [ 547.198377][ T11] kthread+0x28a/0x350 [ 547.198472][ T11] ? __pfx_kthread+0x10/0x10 [ 547.198597][ T11] ret_from_fork+0x31/0x70 [ 547.198725][ T11] ? __pfx_kthread+0x10/0x10 [ 547.198849][ T11] ret_from_fork_asm+0x1a/0x30 [ 547.198975][ T11] [ 547.199069][ T11] [ 547.199132][ T11] Allocated by task 299: [ 547.199228][ T11] kasan_save_stack+0x24/0x50 [ 547.199359][ T11] kasan_save_track+0x14/0x30 [ 547.199481][ T11] __kasan_slab_alloc+0x59/0x70 [ 547.199603][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 547.199728][ T11] copy_net_ns+0xc6/0x540 [ 547.199825][ T11] create_new_namespaces+0x35f/0x920 [ 547.199947][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 547.200070][ T11] ksys_unshare+0x2c4/0x6e0 [ 547.200197][ T11] __x64_sys_unshare+0x31/0x40 [ 547.200319][ T11] do_syscall_64+0xc1/0x1d0 [ 547.200439][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 547.200589][ T11] [ 547.200650][ T11] Freed by task 11: [ 547.200745][ T11] kasan_save_stack+0x24/0x50 [ 547.200867][ T11] kasan_save_track+0x14/0x30 [ 547.200985][ T11] kasan_save_free_info+0x3b/0x60 [ 547.201106][ T11] __kasan_slab_free+0x38/0x50 [ 547.201228][ T11] kmem_cache_free+0xf8/0x330 [ 547.201349][ T11] cleanup_net+0x5a8/0xb90 [ 547.201468][ T11] process_one_work+0xe55/0x16d0 [ 547.201588][ T11] worker_thread+0x58c/0xce0 [ 547.201715][ T11] kthread+0x28a/0x350 [ 547.201808][ T11] ret_from_fork+0x31/0x70 [ 547.201928][ T11] ret_from_fork_asm+0x1a/0x30 [ 547.202050][ T11] [ 547.202112][ T11] Last potentially related work creation: [ 547.202235][ T11] kasan_save_stack+0x24/0x50 [ 547.202360][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 547.202482][ T11] insert_work+0x34/0x230 [ 547.202579][ T11] __queue_work+0x5fd/0xa40 [ 547.202702][ T11] call_timer_fn+0x13b/0x230 [ 547.202825][ T11] __run_timers+0x3ff/0x810 [ 547.202947][ T11] run_timer_softirq+0x154/0x1c0 [ 547.203067][ T11] handle_softirqs+0x1f6/0x5c0 [ 547.203191][ T11] __irq_exit_rcu+0xc4/0x100 [ 547.203313][ T11] irq_exit_rcu+0xe/0x20 [ 547.203405][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 547.203529][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 547.203681][ T11] [ 547.203744][ T11] Second to last potentially related work creation: [ 547.203894][ T11] kasan_save_stack+0x24/0x50 [ 547.204020][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 547.204142][ T11] insert_work+0x34/0x230 [ 547.204239][ T11] __queue_work+0x2ff/0xa40 [ 547.204362][ T11] call_timer_fn+0x13b/0x230 [ 547.204483][ T11] __run_timers+0x3ff/0x810 [ 547.204606][ T11] run_timer_softirq+0x154/0x1c0 [ 547.204728][ T11] handle_softirqs+0x1f6/0x5c0 [ 547.204849][ T11] __irq_exit_rcu+0xc4/0x100 [ 547.204971][ T11] irq_exit_rcu+0xe/0x20 [ 547.205065][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 547.205188][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 547.205345][ T11] [ 547.205407][ T11] The buggy address belongs to the object at ffff888009658040 [ 547.205407][ T11] which belongs to the cache net_namespace of size 6528 [ 547.205725][ T11] The buggy address is located 184 bytes inside of [ 547.205725][ T11] freed 6528-byte region [ffff888009658040, ffff8880096599c0) [ 547.206017][ T11] [ 547.206081][ T11] The buggy address belongs to the physical page: [ 547.206232][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9658 [ 547.206442][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 547.206626][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 547.206781][ T11] page_type: f5(slab) [ 547.206878][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 547.207099][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 547.207319][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 547.207537][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 547.207749][ T11] head: 0080000000000003 ffffea0000259601 ffffffffffffffff 0000000000000000 [ 547.207964][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 547.208183][ T11] page dumped because: kasan: bad access detected [ 547.208331][ T11] [ 547.208392][ T11] Memory state around the buggy address: [ 547.208513][ T11] ffff888009657f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 547.208687][ T11] ffff888009658000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 547.208860][ T11] >ffff888009658080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 547.209042][ T11] ^ [ 547.209219][ T11] ffff888009658100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 547.209390][ T11] ffff888009658180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 547.209568][ T11] ================================================================== [ 547.209766][ T11] Disabling lock debugging due to kernel taint