[ 107.027488][ T1419] pm_nl_ctl (1419) used greatest stack depth: 23088 bytes left [ 136.074691][ T11] ================================================================== [ 136.074996][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 136.075287][ T11] Read of size 8 at addr ffff8880097980f8 by task kworker/u16:0/11 [ 136.075560][ T11] [ 136.075658][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 136.075939][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 136.076173][ T11] Workqueue: netns cleanup_net [ 136.076378][ T11] Call Trace: [ 136.076522][ T11] [ 136.076623][ T11] dump_stack_lvl+0x82/0xd0 [ 136.076817][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 136.077047][ T11] ? cleanup_net+0x932/0xa40 [ 136.077236][ T11] print_report+0xb4/0x270 [ 136.077424][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 136.077609][ T11] kasan_report+0xbd/0xf0 [ 136.077751][ T11] ? cleanup_net+0x932/0xa40 [ 136.077942][ T11] cleanup_net+0x932/0xa40 [ 136.078135][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 136.078325][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 136.078511][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 136.078701][ T11] ? lock_acquire+0x32/0xc0 [ 136.078888][ T11] ? process_one_work+0xe0b/0x16d0 [ 136.079088][ T11] process_one_work+0xe55/0x16d0 [ 136.079285][ T11] ? __pfx___lock_release+0x10/0x10 [ 136.079469][ T11] ? __pfx_process_one_work+0x10/0x10 [ 136.079658][ T11] ? assign_work+0x16c/0x240 [ 136.079844][ T11] worker_thread+0x58c/0xce0 [ 136.080036][ T11] ? __pfx_worker_thread+0x10/0x10 [ 136.080215][ T11] kthread+0x28a/0x350 [ 136.080353][ T11] ? __pfx_kthread+0x10/0x10 [ 136.080532][ T11] ret_from_fork+0x31/0x70 [ 136.080707][ T11] ? __pfx_kthread+0x10/0x10 [ 136.080892][ T11] ret_from_fork_asm+0x1a/0x30 [ 136.081087][ T11] [ 136.081234][ T11] [ 136.081330][ T11] Allocated by task 241: [ 136.081468][ T11] kasan_save_stack+0x24/0x50 [ 136.081651][ T11] kasan_save_track+0x14/0x30 [ 136.081839][ T11] __kasan_slab_alloc+0x59/0x70 [ 136.082030][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 136.082217][ T11] copy_net_ns+0xc6/0x340 [ 136.082351][ T11] create_new_namespaces+0x35f/0x920 [ 136.082528][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 136.082708][ T11] ksys_unshare+0x2a9/0x660 [ 136.082894][ T11] __x64_sys_unshare+0x31/0x40 [ 136.083075][ T11] do_syscall_64+0xc1/0x1d0 [ 136.083253][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 136.083471][ T11] [ 136.083559][ T11] Freed by task 11: [ 136.083682][ T11] kasan_save_stack+0x24/0x50 [ 136.083857][ T11] kasan_save_track+0x14/0x30 [ 136.084022][ T11] kasan_save_free_info+0x3b/0x60 [ 136.084199][ T11] __kasan_slab_free+0x38/0x50 [ 136.084385][ T11] kmem_cache_free+0xf8/0x330 [ 136.084570][ T11] cleanup_net+0x5a8/0xa40 [ 136.084753][ T11] process_one_work+0xe55/0x16d0 [ 136.084927][ T11] worker_thread+0x58c/0xce0 [ 136.085108][ T11] kthread+0x28a/0x350 [ 136.085245][ T11] ret_from_fork+0x31/0x70 [ 136.085425][ T11] ret_from_fork_asm+0x1a/0x30 [ 136.085605][ T11] [ 136.085696][ T11] Last potentially related work creation: [ 136.085869][ T11] kasan_save_stack+0x24/0x50 [ 136.086045][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 136.086221][ T11] insert_work+0x34/0x230 [ 136.086359][ T11] __queue_work+0x5fd/0xa40 [ 136.086533][ T11] queue_delayed_work_on+0x8c/0xa0 [ 136.086712][ T11] __inet_insert_ifa+0x751/0xb10 [ 136.086891][ T11] inetdev_event+0xb18/0xcf0 [ 136.087072][ T11] notifier_call_chain+0xcd/0x150 [ 136.087259][ T11] __dev_notify_flags+0xe6/0x250 [ 136.087441][ T11] dev_change_flags+0xec/0x160 [ 136.087616][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 136.087794][ T11] rtnl_newlink+0x6de/0xa80 [ 136.087987][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 136.088175][ T11] netlink_rcv_skb+0x130/0x360 [ 136.088363][ T11] netlink_unicast+0x44b/0x710 [ 136.088542][ T11] netlink_sendmsg+0x723/0xbe0 [ 136.088729][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 136.088915][ T11] ___sys_sendmsg+0xee/0x170 [ 136.089111][ T11] __sys_sendmsg+0x109/0x1a0 [ 136.089304][ T11] do_syscall_64+0xc1/0x1d0 [ 136.089496][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 136.089725][ T11] [ 136.089823][ T11] The buggy address belongs to the object at ffff888009798040 [ 136.089823][ T11] which belongs to the cache net_namespace of size 6080 [ 136.090306][ T11] The buggy address is located 184 bytes inside of [ 136.090306][ T11] freed 6080-byte region [ffff888009798040, ffff888009799800) [ 136.090742][ T11] [ 136.090937][ T11] The buggy address belongs to the physical page: [ 136.091168][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800979cc00 pfn:0x9798 [ 136.091540][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 136.091930][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 136.092172][ T11] page_type: f5(slab) [ 136.092317][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 136.092868][ T11] raw: ffff88800979cc00 0000000000050003 00000001f5000000 0000000000000000 [ 136.093193][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 136.093524][ T11] head: ffff88800979cc00 0000000000050003 00000001f5000000 0000000000000000 [ 136.093852][ T11] head: 0080000000000003 ffffea000025e601 ffffffffffffffff 0000000000000000 [ 136.094176][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 136.094499][ T11] page dumped because: kasan: bad access detected [ 136.094727][ T11] [ 136.094916][ T11] Memory state around the buggy address: [ 136.095190][ T11] ffff888009797f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 136.095459][ T11] ffff888009798000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 136.095717][ T11] >ffff888009798080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 136.096083][ T11] ^ [ 136.096343][ T11] ffff888009798100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 136.096608][ T11] ffff888009798180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 136.096870][ T11] ================================================================== [ 136.097201][ T11] Disabling lock debugging due to kernel taint