[ 11.713580][ T11] ================================================================== [ 11.713964][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 11.714241][ T11] Read of size 8 at addr ffff88800a2a80f8 by task kworker/u16:0/11 [ 11.714485][ T11] [ 11.714560][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.714777][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.714983][ T11] Workqueue: netns cleanup_net [ 11.715150][ T11] Call Trace: [ 11.715272][ T11] [ 11.715356][ T11] dump_stack_lvl+0x82/0xd0 [ 11.715525][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.715725][ T11] ? cleanup_net+0x932/0xa40 [ 11.715886][ T11] print_report+0xb4/0x270 [ 11.716035][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.716196][ T11] kasan_report+0xbd/0xf0 [ 11.716325][ T11] ? cleanup_net+0x932/0xa40 [ 11.716473][ T11] cleanup_net+0x932/0xa40 [ 11.716619][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.716763][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.716923][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.717104][ T11] ? lock_acquire+0x32/0xc0 [ 11.717249][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.717401][ T11] process_one_work+0xe55/0x16d0 [ 11.717547][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.717690][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.717879][ T11] ? assign_work+0x16c/0x240 [ 11.718039][ T11] worker_thread+0x58c/0xce0 [ 11.718188][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.718335][ T11] kthread+0x28a/0x350 [ 11.718471][ T11] ? __pfx_kthread+0x10/0x10 [ 11.718637][ T11] ret_from_fork+0x31/0x70 [ 11.718822][ T11] ? __pfx_kthread+0x10/0x10 [ 11.718996][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.719189][ T11] [ 11.719335][ T11] [ 11.719430][ T11] Allocated by task 227: [ 11.719598][ T11] kasan_save_stack+0x24/0x50 [ 11.719824][ T11] kasan_save_track+0x14/0x30 [ 11.720013][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.720219][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.720404][ T11] copy_net_ns+0xc6/0x340 [ 11.720512][ T11] create_new_namespaces+0x35f/0x920 [ 11.720683][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 11.720828][ T11] ksys_unshare+0x2a9/0x660 [ 11.721008][ T11] __x64_sys_unshare+0x31/0x40 [ 11.721151][ T11] do_syscall_64+0xc1/0x1d0 [ 11.721295][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.721513][ T11] [ 11.721598][ T11] Freed by task 11: [ 11.721733][ T11] kasan_save_stack+0x24/0x50 [ 11.721916][ T11] kasan_save_track+0x14/0x30 [ 11.722104][ T11] kasan_save_free_info+0x3b/0x60 [ 11.722320][ T11] __kasan_slab_free+0x38/0x50 [ 11.722536][ T11] kmem_cache_free+0xf8/0x330 [ 11.722753][ T11] cleanup_net+0x5a8/0xa40 [ 11.722969][ T11] process_one_work+0xe55/0x16d0 [ 11.723175][ T11] worker_thread+0x58c/0xce0 [ 11.723386][ T11] kthread+0x28a/0x350 [ 11.723549][ T11] ret_from_fork+0x31/0x70 [ 11.723763][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.723976][ T11] [ 11.724098][ T11] The buggy address belongs to the object at ffff88800a2a8040 [ 11.724098][ T11] which belongs to the cache net_namespace of size 5696 [ 11.724642][ T11] The buggy address is located 184 bytes inside of [ 11.724642][ T11] freed 5696-byte region [ffff88800a2a8040, ffff88800a2a9680) [ 11.725146][ T11] [ 11.725255][ T11] The buggy address belongs to the physical page: [ 11.725446][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a2aafc0 pfn:0xa2a8 [ 11.725749][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.726006][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.726189][ T11] page_type: f5(slab) [ 11.726303][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.726565][ T11] raw: ffff88800a2aafc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.726824][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.727107][ T11] head: ffff88800a2aafc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.727381][ T11] head: 0080000000000003 ffffea000028aa01 ffffffffffffffff 0000000000000000 [ 11.727663][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.727950][ T11] page dumped because: kasan: bad access detected [ 11.728155][ T11] [ 11.728233][ T11] Memory state around the buggy address: [ 11.728386][ T11] ffff88800a2a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.728618][ T11] ffff88800a2a8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.728845][ T11] >ffff88800a2a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.729110][ T11] ^ [ 11.729349][ T11] ffff88800a2a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.729580][ T11] ffff88800a2a8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.729802][ T11] ================================================================== [ 11.730082][ T11] Disabling lock debugging due to kernel taint [ 13.831454][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 13.833178][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 13.834397][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 13.835603][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 13.836671][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3