[ 639.451693][ T6531] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 660.331889][ T6876] Failed to register fib notifier [ 696.302233][ T7463] Failed to register fib notifier [ 717.708234][ T7829] Failed to register fib notifier [ 753.795135][ T8415] Failed to register fib notifier [ 755.071929][ T11] ================================================================== [ 755.072234][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 755.072553][ T11] Read of size 8 at addr ffff888008fc80f8 by task kworker/u16:0/11 [ 755.072845][ T11] [ 755.072954][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 755.073265][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 755.073519][ T11] Workqueue: netns cleanup_net [ 755.073743][ T11] Call Trace: [ 755.073900][ T11] [ 755.074012][ T11] dump_stack_lvl+0x82/0xd0 [ 755.074226][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 755.074490][ T11] ? cleanup_net+0x932/0xa40 [ 755.074702][ T11] print_report+0xb4/0x270 [ 755.074911][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 755.075124][ T11] kasan_report+0xbd/0xf0 [ 755.075291][ T11] ? cleanup_net+0x932/0xa40 [ 755.075507][ T11] cleanup_net+0x932/0xa40 [ 755.075709][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 755.075923][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 755.076131][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 755.076343][ T11] ? lock_acquire+0x32/0xc0 [ 755.076549][ T11] ? process_one_work+0xe0b/0x16d0 [ 755.076760][ T11] process_one_work+0xe55/0x16d0 [ 755.076971][ T11] ? __pfx___lock_release+0x10/0x10 [ 755.077179][ T11] ? __pfx_process_one_work+0x10/0x10 [ 755.077390][ T11] ? assign_work+0x16c/0x240 [ 755.077602][ T11] worker_thread+0x58c/0xce0 [ 755.077810][ T11] ? __pfx_worker_thread+0x10/0x10 [ 755.078015][ T11] kthread+0x28a/0x350 [ 755.078170][ T11] ? __pfx_kthread+0x10/0x10 [ 755.078372][ T11] ret_from_fork+0x31/0x70 [ 755.078572][ T11] ? __pfx_kthread+0x10/0x10 [ 755.078773][ T11] ret_from_fork_asm+0x1a/0x30 [ 755.078987][ T11] [ 755.079140][ T11] [ 755.079241][ T11] Allocated by task 249: [ 755.079395][ T11] kasan_save_stack+0x24/0x50 [ 755.079601][ T11] kasan_save_track+0x14/0x30 [ 755.079803][ T11] __kasan_slab_alloc+0x59/0x70 [ 755.080011][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 755.080214][ T11] copy_net_ns+0xc6/0x340 [ 755.080370][ T11] create_new_namespaces+0x35f/0x920 [ 755.080578][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 755.080785][ T11] ksys_unshare+0x2a9/0x660 [ 755.080992][ T11] __x64_sys_unshare+0x31/0x40 [ 755.081192][ T11] do_syscall_64+0xc1/0x1d0 [ 755.081401][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 755.081652][ T11] [ 755.081755][ T11] Freed by task 11: [ 755.081909][ T11] kasan_save_stack+0x24/0x50 [ 755.082117][ T11] kasan_save_track+0x14/0x30 [ 755.082316][ T11] kasan_save_free_info+0x3b/0x60 [ 755.082530][ T11] __kasan_slab_free+0x38/0x50 [ 755.082742][ T11] kmem_cache_free+0xf8/0x330 [ 755.082948][ T11] cleanup_net+0x5a8/0xa40 [ 755.083157][ T11] process_one_work+0xe55/0x16d0 [ 755.083361][ T11] worker_thread+0x58c/0xce0 [ 755.083562][ T11] kthread+0x28a/0x350 [ 755.083727][ T11] ret_from_fork+0x31/0x70 [ 755.083940][ T11] ret_from_fork_asm+0x1a/0x30 [ 755.084145][ T11] [ 755.084249][ T11] Last potentially related work creation: [ 755.084451][ T11] kasan_save_stack+0x24/0x50 [ 755.084656][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 755.084851][ T11] insert_work+0x34/0x230 [ 755.085007][ T11] __queue_work+0x5fd/0xa40 [ 755.085219][ T11] call_timer_fn+0x13b/0x230 [ 755.085426][ T11] __run_timers+0x3ff/0x810 [ 755.085635][ T11] run_timer_softirq+0x154/0x1c0 [ 755.085840][ T11] handle_softirqs+0x1f6/0x5c0 [ 755.086050][ T11] __irq_exit_rcu+0xc4/0x100 [ 755.086252][ T11] irq_exit_rcu+0xe/0x20 [ 755.086409][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 755.086616][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 755.086879][ T11] [ 755.086986][ T11] Second to last potentially related work creation: [ 755.087235][ T11] kasan_save_stack+0x24/0x50 [ 755.087445][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 755.087650][ T11] insert_work+0x34/0x230 [ 755.087805][ T11] __queue_work+0x5fd/0xa40 [ 755.088010][ T11] call_timer_fn+0x13b/0x230 [ 755.088215][ T11] __run_timers+0x3ff/0x810 [ 755.088423][ T11] run_timer_softirq+0x154/0x1c0 [ 755.088631][ T11] handle_softirqs+0x1f6/0x5c0 [ 755.088838][ T11] __irq_exit_rcu+0xc4/0x100 [ 755.089045][ T11] irq_exit_rcu+0xe/0x20 [ 755.089195][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 755.089399][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 755.089653][ T11] [ 755.089758][ T11] The buggy address belongs to the object at ffff888008fc8040 [ 755.089758][ T11] which belongs to the cache net_namespace of size 5696 [ 755.090293][ T11] The buggy address is located 184 bytes inside of [ 755.090293][ T11] freed 5696-byte region [ffff888008fc8040, ffff888008fc9680) [ 755.090770][ T11] [ 755.090874][ T11] The buggy address belongs to the physical page: [ 755.091125][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888008fcafc0 pfn:0x8fc8 [ 755.091525][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 755.091835][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 755.092099][ T11] page_type: f5(slab) [ 755.092258][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 755.092681][ T11] raw: ffff888008fcafc0 0000000000050002 00000001f5000000 0000000000000000 [ 755.093064][ T11] head: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 755.093427][ T11] head: ffff888008fcafc0 0000000000050002 00000001f5000000 0000000000000000 [ 755.093783][ T11] head: 0080000000000003 ffffea000023f201 ffffffffffffffff 0000000000000000 [ 755.094147][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 755.094506][ T11] page dumped because: kasan: bad access detected [ 755.094758][ T11] [ 755.094974][ T11] Memory state around the buggy address: [ 755.095169][ T11] ffff888008fc7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 755.095465][ T11] ffff888008fc8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 755.095761][ T11] >ffff888008fc8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 755.096167][ T11] ^ [ 755.096454][ T11] ffff888008fc8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 755.096742][ T11] ffff888008fc8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 755.097041][ T11] ================================================================== [ 755.097542][ T11] Disabling lock debugging due to kernel taint