[ 10.216563][ T11] ================================================================== [ 10.216883][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.217165][ T11] Read of size 8 at addr ffff8880096600f8 by task kworker/u16:0/11 [ 10.217427][ T11] [ 10.217540][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 10.217845][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.218108][ T11] Workqueue: netns cleanup_net [ 10.218326][ T11] Call Trace: [ 10.218484][ T11] [ 10.218594][ T11] dump_stack_lvl+0x82/0xd0 [ 10.218806][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 10.219064][ T11] ? cleanup_net+0x932/0xa40 [ 10.219268][ T11] print_report+0xb4/0x270 [ 10.219459][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 10.219652][ T11] kasan_report+0xbd/0xf0 [ 10.219804][ T11] ? cleanup_net+0x932/0xa40 [ 10.219994][ T11] cleanup_net+0x932/0xa40 [ 10.220195][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.220393][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 10.220587][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 10.220786][ T11] ? lock_acquire+0x32/0xc0 [ 10.220978][ T11] ? process_one_work+0xe0b/0x16d0 [ 10.221169][ T11] process_one_work+0xe55/0x16d0 [ 10.221366][ T11] ? __pfx___lock_release+0x10/0x10 [ 10.221566][ T11] ? __pfx_process_one_work+0x10/0x10 [ 10.221760][ T11] ? assign_work+0x16c/0x240 [ 10.221952][ T11] worker_thread+0x58c/0xce0 [ 10.222151][ T11] ? __pfx_worker_thread+0x10/0x10 [ 10.222345][ T11] kthread+0x28a/0x350 [ 10.222498][ T11] ? __pfx_kthread+0x10/0x10 [ 10.222692][ T11] ret_from_fork+0x31/0x70 [ 10.222883][ T11] ? __pfx_kthread+0x10/0x10 [ 10.223073][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.223291][ T11] [ 10.223449][ T11] [ 10.223555][ T11] Allocated by task 226: [ 10.223711][ T11] kasan_save_stack+0x24/0x50 [ 10.223922][ T11] kasan_save_track+0x14/0x30 [ 10.224122][ T11] __kasan_slab_alloc+0x59/0x70 [ 10.224322][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.224536][ T11] copy_net_ns+0xc6/0x340 [ 10.224690][ T11] create_new_namespaces+0x35f/0x920 [ 10.224893][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.225092][ T11] ksys_unshare+0x2a9/0x660 [ 10.225242][ T11] __x64_sys_unshare+0x31/0x40 [ 10.225414][ T11] do_syscall_64+0xc1/0x1d0 [ 10.225582][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.225757][ T11] [ 10.225830][ T11] Freed by task 11: [ 10.225932][ T11] kasan_save_stack+0x24/0x50 [ 10.226078][ T11] kasan_save_track+0x14/0x30 [ 10.226218][ T11] kasan_save_free_info+0x3b/0x60 [ 10.226372][ T11] __kasan_slab_free+0x38/0x50 [ 10.226507][ T11] kmem_cache_free+0xf8/0x330 [ 10.226649][ T11] cleanup_net+0x5a8/0xa40 [ 10.226789][ T11] process_one_work+0xe55/0x16d0 [ 10.226926][ T11] worker_thread+0x58c/0xce0 [ 10.227064][ T11] kthread+0x28a/0x350 [ 10.227172][ T11] ret_from_fork+0x31/0x70 [ 10.227309][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.227504][ T11] [ 10.227606][ T11] The buggy address belongs to the object at ffff888009660040 [ 10.227606][ T11] which belongs to the cache net_namespace of size 5696 [ 10.228065][ T11] The buggy address is located 184 bytes inside of [ 10.228065][ T11] freed 5696-byte region [ffff888009660040, ffff888009661680) [ 10.228414][ T11] [ 10.228499][ T11] The buggy address belongs to the physical page: [ 10.228665][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009662fc0 pfn:0x9660 [ 10.228939][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.229146][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.229327][ T11] page_type: f5(slab) [ 10.229443][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.229689][ T11] raw: ffff888009662fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.229930][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.230171][ T11] head: ffff888009662fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.230422][ T11] head: 0080000000000003 ffffea0000259801 ffffffffffffffff 0000000000000000 [ 10.230665][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.230905][ T11] page dumped because: kasan: bad access detected [ 10.231073][ T11] [ 10.231141][ T11] Memory state around the buggy address: [ 10.231276][ T11] ffff88800965ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.231490][ T11] ffff888009660000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.231688][ T11] >ffff888009660080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.231888][ T11] ^ [ 10.232085][ T11] ffff888009660100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.232289][ T11] ffff888009660180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.232494][ T11] ================================================================== [ 10.232713][ T11] Disabling lock debugging due to kernel taint [ 14.614788][ C1] TCP: TCP-AO: the keyid 100 from SYN packet is not present - not sending SYNACK