[ 10.536648][ T65] ================================================================== [ 10.536931][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.537171][ T65] Read of size 8 at addr ffff8880098000f8 by task kworker/u16:1/65 [ 10.537409][ T65] [ 10.537493][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 10.537737][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.537935][ T65] Workqueue: netns cleanup_net [ 10.538107][ T65] Call Trace: [ 10.538233][ T65] [ 10.538321][ T65] dump_stack_lvl+0x82/0xd0 [ 10.538501][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 10.538701][ T65] ? cleanup_net+0x932/0xa40 [ 10.538862][ T65] print_report+0xb4/0x270 [ 10.539023][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 10.539188][ T65] kasan_report+0xbd/0xf0 [ 10.539310][ T65] ? cleanup_net+0x932/0xa40 [ 10.539472][ T65] cleanup_net+0x932/0xa40 [ 10.539645][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.539812][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 10.539971][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 10.540134][ T65] ? lock_acquire+0x32/0xc0 [ 10.540295][ T65] ? process_one_work+0xe0b/0x16d0 [ 10.540463][ T65] process_one_work+0xe55/0x16d0 [ 10.540628][ T65] ? __pfx___lock_release+0x10/0x10 [ 10.540788][ T65] ? __pfx_process_one_work+0x10/0x10 [ 10.540952][ T65] ? assign_work+0x16c/0x240 [ 10.541120][ T65] worker_thread+0x58c/0xce0 [ 10.541279][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.541477][ T65] ? __pfx_worker_thread+0x10/0x10 [ 10.541644][ T65] ? __pfx_worker_thread+0x10/0x10 [ 10.541804][ T65] kthread+0x28a/0x350 [ 10.541927][ T65] ? __pfx_kthread+0x10/0x10 [ 10.542089][ T65] ret_from_fork+0x31/0x70 [ 10.542250][ T65] ? __pfx_kthread+0x10/0x10 [ 10.542408][ T65] ret_from_fork_asm+0x1a/0x30 [ 10.542570][ T65] [ 10.542694][ T65] [ 10.542775][ T65] Allocated by task 227: [ 10.542897][ T65] kasan_save_stack+0x24/0x50 [ 10.543062][ T65] kasan_save_track+0x14/0x30 [ 10.543224][ T65] __kasan_slab_alloc+0x59/0x70 [ 10.543382][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.543547][ T65] copy_net_ns+0xc6/0x340 [ 10.543670][ T65] create_new_namespaces+0x35f/0x920 [ 10.543835][ T65] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.544002][ T65] ksys_unshare+0x2a9/0x660 [ 10.544161][ T65] __x64_sys_unshare+0x31/0x40 [ 10.544319][ T65] do_syscall_64+0xc1/0x1d0 [ 10.544491][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.544690][ T65] [ 10.544774][ T65] Freed by task 65: [ 10.544896][ T65] kasan_save_stack+0x24/0x50 [ 10.545056][ T65] kasan_save_track+0x14/0x30 [ 10.545214][ T65] kasan_save_free_info+0x3b/0x60 [ 10.545375][ T65] __kasan_slab_free+0x38/0x50 [ 10.545531][ T65] kmem_cache_free+0xf8/0x330 [ 10.545692][ T65] cleanup_net+0x5a8/0xa40 [ 10.545849][ T65] process_one_work+0xe55/0x16d0 [ 10.546013][ T65] worker_thread+0x58c/0xce0 [ 10.546170][ T65] kthread+0x28a/0x350 [ 10.546290][ T65] ret_from_fork+0x31/0x70 [ 10.546447][ T65] ret_from_fork_asm+0x1a/0x30 [ 10.546609][ T65] [ 10.546689][ T65] The buggy address belongs to the object at ffff888009800040 [ 10.546689][ T65] which belongs to the cache net_namespace of size 5696 [ 10.547107][ T65] The buggy address is located 184 bytes inside of [ 10.547107][ T65] freed 5696-byte region [ffff888009800040, ffff888009801680) [ 10.547490][ T65] [ 10.547571][ T65] The buggy address belongs to the physical page: [ 10.547764][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009802fc0 pfn:0x9800 [ 10.548094][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.548331][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.548532][ T65] page_type: f5(slab) [ 10.548660][ T65] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.548939][ T65] raw: ffff888009802fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.549220][ T65] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.549499][ T65] head: ffff888009802fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.549791][ T65] head: 0080000000000003 ffffea0000260001 ffffffffffffffff 0000000000000000 [ 10.550086][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.550309][ T65] page dumped because: kasan: bad access detected [ 10.550462][ T65] [ 10.550525][ T65] Memory state around the buggy address: [ 10.550666][ T65] ffff8880097fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.550848][ T65] ffff888009800000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.551082][ T65] >ffff888009800080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.551314][ T65] ^ [ 10.551542][ T65] ffff888009800100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.551771][ T65] ffff888009800180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.552007][ T65] ================================================================== [ 10.552254][ T65] Disabling lock debugging due to kernel taint [ 10.981613][ T227] icmps-accept_ip (227) used greatest stack depth: 24504 bytes left