[ 641.063802][ T6529] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 661.225847][ T6876] Failed to register fib notifier [ 696.250556][ T7462] Failed to register fib notifier [ 717.785347][ T7828] Failed to register fib notifier [ 753.002485][ T8414] Failed to register fib notifier [ 754.295992][ T11] ================================================================== [ 754.296227][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 754.296430][ T11] Read of size 8 at addr ffff88800a2900f8 by task kworker/u16:0/11 [ 754.296620][ T11] [ 754.296685][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 754.296879][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 754.297044][ T11] Workqueue: netns cleanup_net [ 754.297232][ T11] Call Trace: [ 754.297370][ T11] [ 754.297465][ T11] dump_stack_lvl+0x82/0xd0 [ 754.297652][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 754.297902][ T11] ? cleanup_net+0x932/0xa40 [ 754.298097][ T11] print_report+0xb4/0x270 [ 754.298285][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 754.298484][ T11] kasan_report+0xbd/0xf0 [ 754.298644][ T11] ? cleanup_net+0x932/0xa40 [ 754.298840][ T11] cleanup_net+0x932/0xa40 [ 754.299037][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 754.299244][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 754.299433][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 754.299637][ T11] ? lock_acquire+0x32/0xc0 [ 754.299835][ T11] ? process_one_work+0xe0b/0x16d0 [ 754.300035][ T11] process_one_work+0xe55/0x16d0 [ 754.300235][ T11] ? __pfx___lock_release+0x10/0x10 [ 754.300430][ T11] ? __pfx_process_one_work+0x10/0x10 [ 754.300629][ T11] ? assign_work+0x16c/0x240 [ 754.300825][ T11] worker_thread+0x58c/0xce0 [ 754.301026][ T11] ? __pfx_worker_thread+0x10/0x10 [ 754.301228][ T11] kthread+0x28a/0x350 [ 754.301384][ T11] ? __pfx_kthread+0x10/0x10 [ 754.301583][ T11] ret_from_fork+0x31/0x70 [ 754.301788][ T11] ? __pfx_kthread+0x10/0x10 [ 754.301995][ T11] ret_from_fork_asm+0x1a/0x30 [ 754.302197][ T11] [ 754.302344][ T11] [ 754.302444][ T11] Allocated by task 249: [ 754.302589][ T11] kasan_save_stack+0x24/0x50 [ 754.302780][ T11] kasan_save_track+0x14/0x30 [ 754.302960][ T11] __kasan_slab_alloc+0x59/0x70 [ 754.303138][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 754.303316][ T11] copy_net_ns+0xc6/0x340 [ 754.303460][ T11] create_new_namespaces+0x35f/0x920 [ 754.303641][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 754.303824][ T11] ksys_unshare+0x2a9/0x660 [ 754.304004][ T11] __x64_sys_unshare+0x31/0x40 [ 754.304182][ T11] do_syscall_64+0xc1/0x1d0 [ 754.304368][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 754.304606][ T11] [ 754.304707][ T11] Freed by task 11: [ 754.304853][ T11] kasan_save_stack+0x24/0x50 [ 754.305046][ T11] kasan_save_track+0x14/0x30 [ 754.305240][ T11] kasan_save_free_info+0x3b/0x60 [ 754.305419][ T11] __kasan_slab_free+0x38/0x50 [ 754.305599][ T11] kmem_cache_free+0xf8/0x330 [ 754.305797][ T11] cleanup_net+0x5a8/0xa40 [ 754.306002][ T11] process_one_work+0xe55/0x16d0 [ 754.306313][ T11] worker_thread+0x58c/0xce0 [ 754.306509][ T11] kthread+0x28a/0x350 [ 754.306653][ T11] ret_from_fork+0x31/0x70 [ 754.306854][ T11] ret_from_fork_asm+0x1a/0x30 [ 754.307166][ T11] [ 754.307268][ T11] Last potentially related work creation: [ 754.307470][ T11] kasan_save_stack+0x24/0x50 [ 754.307693][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 754.307987][ T11] insert_work+0x34/0x230 [ 754.308137][ T11] __queue_work+0x5fd/0xa40 [ 754.308341][ T11] call_timer_fn+0x13b/0x230 [ 754.308553][ T11] __run_timers+0x3ff/0x810 [ 754.308767][ T11] run_timer_softirq+0x154/0x1c0 [ 754.309094][ T11] handle_softirqs+0x1f6/0x5c0 [ 754.309304][ T11] __irq_exit_rcu+0xc4/0x100 [ 754.309512][ T11] irq_exit_rcu+0xe/0x20 [ 754.309672][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 754.309991][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 754.310249][ T11] [ 754.310357][ T11] Second to last potentially related work creation: [ 754.310612][ T11] kasan_save_stack+0x24/0x50 [ 754.310946][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 754.311166][ T11] insert_work+0x34/0x230 [ 754.311319][ T11] __queue_work+0x5fd/0xa40 [ 754.311515][ T11] call_timer_fn+0x13b/0x230 [ 754.311789][ T11] __run_timers+0x3ff/0x810 [ 754.311964][ T11] run_timer_softirq+0x154/0x1c0 [ 754.312172][ T11] handle_softirqs+0x1f6/0x5c0 [ 754.312383][ T11] __irq_exit_rcu+0xc4/0x100 [ 754.312705][ T11] irq_exit_rcu+0xe/0x20 [ 754.312874][ T11] sysvec_apic_timer_interrupt+0x78/0x90 [ 754.313082][ T11] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 754.313346][ T11] [ 754.313454][ T11] The buggy address belongs to the object at ffff88800a290040 [ 754.313454][ T11] which belongs to the cache net_namespace of size 5696 [ 754.314046][ T11] The buggy address is located 184 bytes inside of [ 754.314046][ T11] freed 5696-byte region [ffff88800a290040, ffff88800a291680) [ 754.314449][ T11] [ 754.314519][ T11] The buggy address belongs to the physical page: [ 754.314690][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a292fc0 pfn:0xa290 [ 754.315035][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 754.315252][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 754.315431][ T11] page_type: f5(slab) [ 754.315608][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 754.315855][ T11] raw: ffff88800a292fc0 0000000000050002 00000001f5000000 0000000000000000 [ 754.316109][ T11] head: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 754.316428][ T11] head: ffff88800a292fc0 0000000000050002 00000001f5000000 0000000000000000 [ 754.316674][ T11] head: 0080000000000003 ffffea000028a401 ffffffffffffffff 0000000000000000 [ 754.316985][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 754.317234][ T11] page dumped because: kasan: bad access detected [ 754.317481][ T11] [ 754.317560][ T11] Memory state around the buggy address: [ 754.317696][ T11] ffff88800a28ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 754.317897][ T11] ffff88800a290000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 754.318165][ T11] >ffff88800a290080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 754.318391][ T11] ^ [ 754.318697][ T11] ffff88800a290100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 754.319174][ T11] ffff88800a290180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 754.319453][ T11] ================================================================== [ 754.319903][ T11] Disabling lock debugging due to kernel taint