[ 9.666692][ T67] ================================================================== [ 9.666998][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 9.667235][ T67] Read of size 8 at addr ffff888002a780f8 by task kworker/u16:1/67 [ 9.667461][ T67] [ 9.667545][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 9.667788][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 9.668010][ T67] Workqueue: netns cleanup_net [ 9.668176][ T67] Call Trace: [ 9.668303][ T67] [ 9.668387][ T67] dump_stack_lvl+0x82/0xd0 [ 9.668547][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 9.668747][ T67] ? cleanup_net+0x932/0xa40 [ 9.668911][ T67] print_report+0xb4/0x270 [ 9.669070][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 9.669225][ T67] kasan_report+0xbd/0xf0 [ 9.669349][ T67] ? cleanup_net+0x932/0xa40 [ 9.669509][ T67] cleanup_net+0x932/0xa40 [ 9.669667][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 9.669826][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 9.669983][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 9.670143][ T67] ? lock_acquire+0x32/0xc0 [ 9.670299][ T67] ? process_one_work+0xe0b/0x16d0 [ 9.670458][ T67] process_one_work+0xe55/0x16d0 [ 9.670617][ T67] ? __pfx___lock_release+0x10/0x10 [ 9.670773][ T67] ? __pfx_process_one_work+0x10/0x10 [ 9.670934][ T67] ? assign_work+0x16c/0x240 [ 9.671095][ T67] worker_thread+0x58c/0xce0 [ 9.671254][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 9.671451][ T67] ? __pfx_worker_thread+0x10/0x10 [ 9.671607][ T67] ? __pfx_worker_thread+0x10/0x10 [ 9.671760][ T67] kthread+0x28a/0x350 [ 9.671879][ T67] ? __pfx_kthread+0x10/0x10 [ 9.672043][ T67] ret_from_fork+0x31/0x70 [ 9.672199][ T67] ? __pfx_kthread+0x10/0x10 [ 9.672355][ T67] ret_from_fork_asm+0x1a/0x30 [ 9.672520][ T67] [ 9.672641][ T67] [ 9.672721][ T67] Allocated by task 226: [ 9.672839][ T67] kasan_save_stack+0x24/0x50 [ 9.673008][ T67] kasan_save_track+0x14/0x30 [ 9.673166][ T67] __kasan_slab_alloc+0x59/0x70 [ 9.673323][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 9.673482][ T67] copy_net_ns+0xc6/0x340 [ 9.673601][ T67] create_new_namespaces+0x35f/0x920 [ 9.673765][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 9.673920][ T67] ksys_unshare+0x2a9/0x660 [ 9.674077][ T67] __x64_sys_unshare+0x31/0x40 [ 9.674231][ T67] do_syscall_64+0xc1/0x1d0 [ 9.674387][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 9.674580][ T67] [ 9.674660][ T67] Freed by task 67: [ 9.674777][ T67] kasan_save_stack+0x24/0x50 [ 9.674949][ T67] kasan_save_track+0x14/0x30 [ 9.675104][ T67] kasan_save_free_info+0x3b/0x60 [ 9.675264][ T67] __kasan_slab_free+0x38/0x50 [ 9.675420][ T67] kmem_cache_free+0xf8/0x330 [ 9.675577][ T67] cleanup_net+0x5a8/0xa40 [ 9.675736][ T67] process_one_work+0xe55/0x16d0 [ 9.675892][ T67] worker_thread+0x58c/0xce0 [ 9.676054][ T67] kthread+0x28a/0x350 [ 9.676174][ T67] ret_from_fork+0x31/0x70 [ 9.676331][ T67] ret_from_fork_asm+0x1a/0x30 [ 9.676491][ T67] [ 9.676571][ T67] The buggy address belongs to the object at ffff888002a78040 [ 9.676571][ T67] which belongs to the cache net_namespace of size 5696 [ 9.676986][ T67] The buggy address is located 184 bytes inside of [ 9.676986][ T67] freed 5696-byte region [ffff888002a78040, ffff888002a79680) [ 9.677373][ T67] [ 9.677460][ T67] The buggy address belongs to the physical page: [ 9.677649][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888002a7afc0 pfn:0x2a78 [ 9.677980][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 9.678225][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 9.678425][ T67] page_type: f5(slab) [ 9.678557][ T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 9.678837][ T67] raw: ffff888002a7afc0 0000000000050002 00000001f5000000 0000000000000000 [ 9.679116][ T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 9.679394][ T67] head: ffff888002a7afc0 0000000000050002 00000001f5000000 0000000000000000 [ 9.679668][ T67] head: 0080000000000003 ffffea00000a9e01 ffffffffffffffff 0000000000000000 [ 9.679946][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 9.680214][ T67] page dumped because: kasan: bad access detected [ 9.680408][ T67] [ 9.680489][ T67] Memory state around the buggy address: [ 9.680645][ T67] ffff888002a77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 9.680875][ T67] ffff888002a78000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 9.681097][ T67] >ffff888002a78080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 9.681320][ T67] ^ [ 9.681550][ T67] ffff888002a78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 9.681780][ T67] ffff888002a78180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 9.682001][ T67] ================================================================== [ 9.682256][ T67] Disabling lock debugging due to kernel taint