[ 11.080559][ T11] ================================================================== [ 11.080819][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 11.081087][ T11] Read of size 8 at addr ffff8880124080f8 by task kworker/u16:0/11 [ 11.081328][ T11] [ 11.081423][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.081634][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.081819][ T11] Workqueue: netns cleanup_net [ 11.082018][ T11] Call Trace: [ 11.082132][ T11] [ 11.082209][ T11] dump_stack_lvl+0x82/0xd0 [ 11.082364][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.082571][ T11] ? cleanup_net+0x932/0xa40 [ 11.082724][ T11] print_report+0xb4/0x270 [ 11.082892][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.083059][ T11] kasan_report+0xbd/0xf0 [ 11.083215][ T11] ? cleanup_net+0x932/0xa40 [ 11.083362][ T11] cleanup_net+0x932/0xa40 [ 11.083510][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.083677][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.083826][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.083968][ T11] ? lock_acquire+0x32/0xc0 [ 11.084115][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.084299][ T11] process_one_work+0xe55/0x16d0 [ 11.084447][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.084586][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.084732][ T11] ? assign_work+0x16c/0x240 [ 11.084873][ T11] worker_thread+0x58c/0xce0 [ 11.085014][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.085187][ T11] kthread+0x28a/0x350 [ 11.085296][ T11] ? __pfx_kthread+0x10/0x10 [ 11.085442][ T11] ret_from_fork+0x31/0x70 [ 11.085584][ T11] ? __pfx_kthread+0x10/0x10 [ 11.085722][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.085886][ T11] [ 11.086015][ T11] [ 11.086098][ T11] Allocated by task 226: [ 11.086210][ T11] kasan_save_stack+0x24/0x50 [ 11.086353][ T11] kasan_save_track+0x14/0x30 [ 11.086502][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.086657][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.086810][ T11] copy_net_ns+0xc6/0x340 [ 11.086937][ T11] create_new_namespaces+0x35f/0x920 [ 11.087126][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 11.087271][ T11] ksys_unshare+0x2a9/0x660 [ 11.087450][ T11] __x64_sys_unshare+0x31/0x40 [ 11.087599][ T11] do_syscall_64+0xc1/0x1d0 [ 11.087726][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.087919][ T11] [ 11.088001][ T11] Freed by task 11: [ 11.088097][ T11] kasan_save_stack+0x24/0x50 [ 11.088235][ T11] kasan_save_track+0x14/0x30 [ 11.088404][ T11] kasan_save_free_info+0x3b/0x60 [ 11.088558][ T11] __kasan_slab_free+0x38/0x50 [ 11.088682][ T11] kmem_cache_free+0xf8/0x330 [ 11.088808][ T11] cleanup_net+0x5a8/0xa40 [ 11.088941][ T11] process_one_work+0xe55/0x16d0 [ 11.089079][ T11] worker_thread+0x58c/0xce0 [ 11.089225][ T11] kthread+0x28a/0x350 [ 11.089354][ T11] ret_from_fork+0x31/0x70 [ 11.089525][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.089667][ T11] [ 11.089738][ T11] The buggy address belongs to the object at ffff888012408040 [ 11.089738][ T11] which belongs to the cache net_namespace of size 5696 [ 11.090103][ T11] The buggy address is located 184 bytes inside of [ 11.090103][ T11] freed 5696-byte region [ffff888012408040, ffff888012409680) [ 11.090462][ T11] [ 11.090540][ T11] The buggy address belongs to the physical page: [ 11.090743][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801240afc0 pfn:0x12408 [ 11.091065][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.091311][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.091527][ T11] page_type: f5(slab) [ 11.091639][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.091926][ T11] raw: ffff88801240afc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.092199][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.092479][ T11] head: ffff88801240afc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.092756][ T11] head: 0080000000000003 ffffea0000490201 ffffffffffffffff 0000000000000000 [ 11.093035][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.093308][ T11] page dumped because: kasan: bad access detected [ 11.093493][ T11] [ 11.093575][ T11] Memory state around the buggy address: [ 11.093736][ T11] ffff888012407f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.093978][ T11] ffff888012408000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.094201][ T11] >ffff888012408080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.094445][ T11] ^ [ 11.094655][ T11] ffff888012408100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.094910][ T11] ffff888012408180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.095127][ T11] ================================================================== [ 11.095421][ T11] Disabling lock debugging due to kernel taint [ 12.993300][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.994592][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.996349][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.997578][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.998739][ T226] TCP: AO key ifindex 200 != sk bound ifindex 3