[ 10.135276][ T253] ip (253) used greatest stack depth: 23944 bytes left [ 20.067032][ T11] ================================================================== [ 20.067252][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 20.067447][ T11] Read of size 8 at addr ffff88800b2680f8 by task kworker/u16:0/11 [ 20.067627][ T11] [ 20.067691][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 20.067880][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.068034][ T11] Workqueue: netns cleanup_net [ 20.068165][ T11] Call Trace: [ 20.068260][ T11] [ 20.068330][ T11] dump_stack_lvl+0x82/0xd0 [ 20.068460][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 20.068616][ T11] ? cleanup_net+0xa5d/0xb90 [ 20.068745][ T11] print_report+0xb4/0x270 [ 20.068870][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 20.068994][ T11] kasan_report+0xbd/0xf0 [ 20.069092][ T11] ? cleanup_net+0xa5d/0xb90 [ 20.069220][ T11] cleanup_net+0xa5d/0xb90 [ 20.069345][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.069476][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 20.069600][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 20.069725][ T11] ? lock_acquire+0x32/0xc0 [ 20.069849][ T11] ? process_one_work+0xe0b/0x16d0 [ 20.069977][ T11] process_one_work+0xe55/0x16d0 [ 20.070102][ T11] ? __pfx___lock_release+0x10/0x10 [ 20.070229][ T11] ? __pfx_process_one_work+0x10/0x10 [ 20.070355][ T11] ? assign_work+0x16c/0x240 [ 20.070485][ T11] worker_thread+0x58c/0xce0 [ 20.070613][ T11] ? __pfx_worker_thread+0x10/0x10 [ 20.070739][ T11] kthread+0x28a/0x350 [ 20.070833][ T11] ? __pfx_kthread+0x10/0x10 [ 20.070957][ T11] ret_from_fork+0x31/0x70 [ 20.071081][ T11] ? __pfx_kthread+0x10/0x10 [ 20.071205][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.071336][ T11] [ 20.071429][ T11] [ 20.071492][ T11] Allocated by task 252: [ 20.071585][ T11] kasan_save_stack+0x24/0x50 [ 20.071711][ T11] kasan_save_track+0x14/0x30 [ 20.071832][ T11] __kasan_slab_alloc+0x59/0x70 [ 20.071956][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.072082][ T11] copy_net_ns+0xc6/0x540 [ 20.072176][ T11] create_new_namespaces+0x35f/0x920 [ 20.072303][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 20.072431][ T11] ksys_unshare+0x2c4/0x6e0 [ 20.072557][ T11] __x64_sys_unshare+0x31/0x40 [ 20.072680][ T11] do_syscall_64+0xc1/0x1d0 [ 20.072804][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.072960][ T11] [ 20.073022][ T11] Freed by task 11: [ 20.073113][ T11] kasan_save_stack+0x24/0x50 [ 20.073242][ T11] kasan_save_track+0x14/0x30 [ 20.073366][ T11] kasan_save_free_info+0x3b/0x60 [ 20.073488][ T11] __kasan_slab_free+0x38/0x50 [ 20.073608][ T11] kmem_cache_free+0xf8/0x330 [ 20.073731][ T11] cleanup_net+0x5a8/0xb90 [ 20.073855][ T11] process_one_work+0xe55/0x16d0 [ 20.073978][ T11] worker_thread+0x58c/0xce0 [ 20.074102][ T11] kthread+0x28a/0x350 [ 20.074198][ T11] ret_from_fork+0x31/0x70 [ 20.074324][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.074457][ T11] [ 20.074519][ T11] Last potentially related work creation: [ 20.074643][ T11] kasan_save_stack+0x24/0x50 [ 20.074769][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 20.074895][ T11] insert_work+0x34/0x230 [ 20.074987][ T11] __queue_work+0x5fd/0xa40 [ 20.075111][ T11] queue_delayed_work_on+0x8c/0xa0 [ 20.075235][ T11] __inet_insert_ifa+0x751/0xb10 [ 20.075364][ T11] inetdev_event+0xb18/0xcf0 [ 20.075488][ T11] notifier_call_chain+0xcd/0x150 [ 20.075615][ T11] __dev_notify_flags+0xe6/0x250 [ 20.075738][ T11] dev_change_flags+0xec/0x160 [ 20.075861][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 20.075988][ T11] rtnl_newlink+0x6de/0xa80 [ 20.076113][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 20.076237][ T11] netlink_rcv_skb+0x130/0x360 [ 20.076367][ T11] netlink_unicast+0x44b/0x710 [ 20.076492][ T11] netlink_sendmsg+0x723/0xbe0 [ 20.076623][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 20.076747][ T11] ___sys_sendmsg+0xee/0x170 [ 20.076870][ T11] __sys_sendmsg+0x109/0x1a0 [ 20.076996][ T11] do_syscall_64+0xc1/0x1d0 [ 20.077121][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.077281][ T11] [ 20.077346][ T11] The buggy address belongs to the object at ffff88800b268040 [ 20.077346][ T11] which belongs to the cache net_namespace of size 6528 [ 20.077674][ T11] The buggy address is located 184 bytes inside of [ 20.077674][ T11] freed 6528-byte region [ffff88800b268040, ffff88800b2699c0) [ 20.077972][ T11] [ 20.078039][ T11] The buggy address belongs to the physical page: [ 20.078195][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b26b640 pfn:0xb268 [ 20.078445][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.078635][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.078794][ T11] page_type: f5(slab) [ 20.078893][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.079113][ T11] raw: ffff88800b26b640 0000000000040002 00000001f5000000 0000000000000000 [ 20.079331][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.079554][ T11] head: ffff88800b26b640 0000000000040002 00000001f5000000 0000000000000000 [ 20.079779][ T11] head: 0080000000000003 ffffea00002c9a01 ffffffffffffffff 0000000000000000 [ 20.079998][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.080218][ T11] page dumped because: kasan: bad access detected [ 20.080371][ T11] [ 20.080434][ T11] Memory state around the buggy address: [ 20.080554][ T11] ffff88800b267f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.080737][ T11] ffff88800b268000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.080916][ T11] >ffff88800b268080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.081094][ T11] ^ [ 20.081275][ T11] ffff88800b268100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.081477][ T11] ffff88800b268180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.081654][ T11] ================================================================== [ 20.081855][ T11] Disabling lock debugging due to kernel taint