[ 10.720119][ T276] veth0: renamed from veth-rt-1 [ 11.570673][ T285] veth0: renamed from veth-rt-2 [ 18.479400][ T66] ================================================================== [ 18.479622][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 18.479809][ T66] Read of size 8 at addr ffff88800b0d80f8 by task kworker/u16:1/66 [ 18.479988][ T66] [ 18.480052][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 18.480244][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.480398][ T66] Workqueue: netns cleanup_net [ 18.480532][ T66] Call Trace: [ 18.480627][ T66] [ 18.480694][ T66] dump_stack_lvl+0x82/0xd0 [ 18.480827][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 18.480981][ T66] ? cleanup_net+0xa5d/0xb90 [ 18.481106][ T66] print_report+0xb4/0x270 [ 18.481228][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 18.481353][ T66] kasan_report+0xbd/0xf0 [ 18.481448][ T66] ? cleanup_net+0xa5d/0xb90 [ 18.481577][ T66] cleanup_net+0xa5d/0xb90 [ 18.481699][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.481828][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 18.481952][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 18.482075][ T66] ? lock_acquire+0x32/0xc0 [ 18.482198][ T66] ? process_one_work+0xe0b/0x16d0 [ 18.482328][ T66] process_one_work+0xe55/0x16d0 [ 18.482453][ T66] ? __pfx___lock_release+0x10/0x10 [ 18.482574][ T66] ? __pfx_process_one_work+0x10/0x10 [ 18.482703][ T66] ? assign_work+0x16c/0x240 [ 18.482829][ T66] worker_thread+0x58c/0xce0 [ 18.482952][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 18.483109][ T66] ? __pfx_worker_thread+0x10/0x10 [ 18.483232][ T66] ? __pfx_worker_thread+0x10/0x10 [ 18.483357][ T66] kthread+0x28a/0x350 [ 18.483452][ T66] ? __pfx_kthread+0x10/0x10 [ 18.483577][ T66] ret_from_fork+0x31/0x70 [ 18.483700][ T66] ? __pfx_kthread+0x10/0x10 [ 18.483827][ T66] ret_from_fork_asm+0x1a/0x30 [ 18.483958][ T66] [ 18.484055][ T66] [ 18.484121][ T66] Allocated by task 262: [ 18.484219][ T66] kasan_save_stack+0x24/0x50 [ 18.484355][ T66] kasan_save_track+0x14/0x30 [ 18.484477][ T66] __kasan_slab_alloc+0x59/0x70 [ 18.484598][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.484725][ T66] copy_net_ns+0xc6/0x540 [ 18.484819][ T66] create_new_namespaces+0x35f/0x920 [ 18.484946][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 18.485074][ T66] ksys_unshare+0x2c4/0x6e0 [ 18.485199][ T66] __x64_sys_unshare+0x31/0x40 [ 18.485326][ T66] do_syscall_64+0xc1/0x1d0 [ 18.485452][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.485608][ T66] [ 18.485672][ T66] Freed by task 66: [ 18.485772][ T66] kasan_save_stack+0x24/0x50 [ 18.485931][ T66] kasan_save_track+0x14/0x30 [ 18.486055][ T66] kasan_save_free_info+0x3b/0x60 [ 18.486184][ T66] __kasan_slab_free+0x38/0x50 [ 18.486311][ T66] kmem_cache_free+0xf8/0x330 [ 18.486434][ T66] cleanup_net+0x5a8/0xb90 [ 18.486556][ T66] process_one_work+0xe55/0x16d0 [ 18.486681][ T66] worker_thread+0x58c/0xce0 [ 18.486805][ T66] kthread+0x28a/0x350 [ 18.486900][ T66] ret_from_fork+0x31/0x70 [ 18.487021][ T66] ret_from_fork_asm+0x1a/0x30 [ 18.487148][ T66] [ 18.487212][ T66] Last potentially related work creation: [ 18.487335][ T66] kasan_save_stack+0x24/0x50 [ 18.487458][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 18.487584][ T66] insert_work+0x34/0x230 [ 18.487682][ T66] __queue_work+0x5fd/0xa40 [ 18.487822][ T66] queue_delayed_work_on+0x8c/0xa0 [ 18.487945][ T66] __inet_insert_ifa+0x751/0xb10 [ 18.488074][ T66] inetdev_event+0xb18/0xcf0 [ 18.488198][ T66] notifier_call_chain+0xcd/0x150 [ 18.488324][ T66] __dev_notify_flags+0xe6/0x250 [ 18.488449][ T66] dev_change_flags+0xec/0x160 [ 18.488574][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 18.488700][ T66] rtnl_newlink+0x6de/0xa80 [ 18.488826][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 18.488949][ T66] netlink_rcv_skb+0x130/0x360 [ 18.489079][ T66] netlink_unicast+0x44b/0x710 [ 18.489205][ T66] netlink_sendmsg+0x723/0xbe0 [ 18.489330][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 18.489454][ T66] ___sys_sendmsg+0xee/0x170 [ 18.489575][ T66] __sys_sendmsg+0x109/0x1a0 [ 18.489700][ T66] do_syscall_64+0xc1/0x1d0 [ 18.489825][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.489980][ T66] [ 18.490048][ T66] The buggy address belongs to the object at ffff88800b0d8040 [ 18.490048][ T66] which belongs to the cache net_namespace of size 6528 [ 18.490368][ T66] The buggy address is located 184 bytes inside of [ 18.490368][ T66] freed 6528-byte region [ffff88800b0d8040, ffff88800b0d99c0) [ 18.490680][ T66] [ 18.490743][ T66] The buggy address belongs to the physical page: [ 18.490896][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb0d8 [ 18.491112][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.491299][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 18.491455][ T66] page_type: f5(slab) [ 18.491553][ T66] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 18.491775][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 18.491993][ T66] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 18.492218][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 18.492431][ T66] head: 0080000000000003 ffffea00002c3601 ffffffffffffffff 0000000000000000 [ 18.492649][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.492933][ T66] page dumped because: kasan: bad access detected [ 18.493084][ T66] [ 18.493148][ T66] Memory state around the buggy address: [ 18.493271][ T66] ffff88800b0d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.493445][ T66] ffff88800b0d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.493685][ T66] >ffff88800b0d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.493923][ T66] ^ [ 18.494099][ T66] ffff88800b0d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.494280][ T66] ffff88800b0d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.494524][ T66] ================================================================== [ 18.494721][ T66] Disabling lock debugging due to kernel taint