[ 10.119417][ T255] gre: GRE over IPv4 demultiplexor driver [ 11.351829][ T278] ip_gre: GRE over IPv4 tunneling driver [ 13.001094][ T67] ================================================================== [ 13.001340][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.001563][ T67] Read of size 8 at addr ffff88800b9900f8 by task kworker/u16:1/67 [ 13.001774][ T67] [ 13.001851][ T67] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 13.002066][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.002250][ T67] Workqueue: netns cleanup_net [ 13.002402][ T67] Call Trace: [ 13.002508][ T67] [ 13.002584][ T67] dump_stack_lvl+0x82/0xd0 [ 13.002733][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 13.002913][ T67] ? cleanup_net+0xa5d/0xb90 [ 13.003062][ T67] print_report+0xb4/0x270 [ 13.003208][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 13.003350][ T67] kasan_report+0xbd/0xf0 [ 13.003466][ T67] ? cleanup_net+0xa5d/0xb90 [ 13.003609][ T67] cleanup_net+0xa5d/0xb90 [ 13.003755][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.003909][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 13.004048][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 13.004214][ T67] ? lock_acquire+0x32/0xc0 [ 13.004359][ T67] ? process_one_work+0xe0b/0x16d0 [ 13.004509][ T67] process_one_work+0xe55/0x16d0 [ 13.004655][ T67] ? __pfx___lock_release+0x10/0x10 [ 13.004799][ T67] ? __pfx_process_one_work+0x10/0x10 [ 13.004946][ T67] ? assign_work+0x16c/0x240 [ 13.005095][ T67] worker_thread+0x58c/0xce0 [ 13.005245][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 13.005428][ T67] ? __pfx_worker_thread+0x10/0x10 [ 13.005569][ T67] ? __pfx_worker_thread+0x10/0x10 [ 13.005715][ T67] kthread+0x28a/0x350 [ 13.005829][ T67] ? __pfx_kthread+0x10/0x10 [ 13.005974][ T67] ret_from_fork+0x31/0x70 [ 13.006115][ T67] ? __pfx_kthread+0x10/0x10 [ 13.006265][ T67] ret_from_fork_asm+0x1a/0x30 [ 13.006415][ T67] [ 13.006527][ T67] [ 13.006600][ T67] Allocated by task 268: [ 13.006706][ T67] kasan_save_stack+0x24/0x50 [ 13.006854][ T67] kasan_save_track+0x14/0x30 [ 13.007000][ T67] __kasan_slab_alloc+0x59/0x70 [ 13.007149][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.007293][ T67] copy_net_ns+0xc6/0x540 [ 13.007402][ T67] create_new_namespaces+0x35f/0x920 [ 13.007546][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.007691][ T67] ksys_unshare+0x2c4/0x6e0 [ 13.007831][ T67] __x64_sys_unshare+0x31/0x40 [ 13.007970][ T67] do_syscall_64+0xc1/0x1d0 [ 13.008117][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.008296][ T67] [ 13.008369][ T67] Freed by task 67: [ 13.008472][ T67] kasan_save_stack+0x24/0x50 [ 13.008616][ T67] kasan_save_track+0x14/0x30 [ 13.008756][ T67] kasan_save_free_info+0x3b/0x60 [ 13.008895][ T67] __kasan_slab_free+0x38/0x50 [ 13.009034][ T67] kmem_cache_free+0xf8/0x330 [ 13.009174][ T67] cleanup_net+0x5a8/0xb90 [ 13.009312][ T67] process_one_work+0xe55/0x16d0 [ 13.009449][ T67] worker_thread+0x58c/0xce0 [ 13.009586][ T67] kthread+0x28a/0x350 [ 13.009694][ T67] ret_from_fork+0x31/0x70 [ 13.009834][ T67] ret_from_fork_asm+0x1a/0x30 [ 13.009972][ T67] [ 13.010042][ T67] Last potentially related work creation: [ 13.010183][ T67] kasan_save_stack+0x24/0x50 [ 13.010341][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 13.010488][ T67] insert_work+0x34/0x230 [ 13.010598][ T67] __queue_work+0x5fd/0xa40 [ 13.010739][ T67] queue_delayed_work_on+0x8c/0xa0 [ 13.010881][ T67] __inet_insert_ifa+0x751/0xb10 [ 13.011024][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 13.011180][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 13.011328][ T67] netlink_rcv_skb+0x130/0x360 [ 13.011471][ T67] netlink_unicast+0x44b/0x710 [ 13.011617][ T67] netlink_sendmsg+0x723/0xbe0 [ 13.011765][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 13.011912][ T67] ___sys_sendmsg+0xee/0x170 [ 13.012058][ T67] __sys_sendmsg+0x109/0x1a0 [ 13.012204][ T67] do_syscall_64+0xc1/0x1d0 [ 13.012351][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.012536][ T67] [ 13.012608][ T67] Second to last potentially related work creation: [ 13.012782][ T67] kasan_save_stack+0x24/0x50 [ 13.012926][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 13.013069][ T67] insert_work+0x34/0x230 [ 13.013178][ T67] __queue_work+0x5fd/0xa40 [ 13.013319][ T67] queue_delayed_work_on+0x8c/0xa0 [ 13.013480][ T67] __inet_insert_ifa+0x751/0xb10 [ 13.013629][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 13.013773][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 13.013920][ T67] netlink_rcv_skb+0x130/0x360 [ 13.014065][ T67] netlink_unicast+0x44b/0x710 [ 13.014210][ T67] netlink_sendmsg+0x723/0xbe0 [ 13.014351][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 13.014498][ T67] ___sys_sendmsg+0xee/0x170 [ 13.014643][ T67] __sys_sendmsg+0x109/0x1a0 [ 13.014786][ T67] do_syscall_64+0xc1/0x1d0 [ 13.014928][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.015103][ T67] [ 13.015175][ T67] The buggy address belongs to the object at ffff88800b990040 [ 13.015175][ T67] which belongs to the cache net_namespace of size 6528 [ 13.015557][ T67] The buggy address is located 184 bytes inside of [ 13.015557][ T67] freed 6528-byte region [ffff88800b990040, ffff88800b9919c0) [ 13.015894][ T67] [ 13.015966][ T67] The buggy address belongs to the physical page: [ 13.016137][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b993640 pfn:0xb990 [ 13.016416][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.016630][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.016810][ T67] page_type: f5(slab) [ 13.016918][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.017167][ T67] raw: ffff88800b993640 0000000000040002 00000001f5000000 0000000000000000 [ 13.017422][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.017686][ T67] head: ffff88800b993640 0000000000040002 00000001f5000000 0000000000000000 [ 13.017931][ T67] head: 0080000000000003 ffffea00002e6401 ffffffffffffffff 0000000000000000 [ 13.018173][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.018418][ T67] page dumped because: kasan: bad access detected [ 13.018598][ T67] [ 13.018670][ T67] Memory state around the buggy address: [ 13.018816][ T67] ffff88800b98ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.019020][ T67] ffff88800b990000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.019217][ T67] >ffff88800b990080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.019423][ T67] ^ [ 13.019624][ T67] ffff88800b990100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.019827][ T67] ffff88800b990180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.020030][ T67] ================================================================== [ 13.020254][ T67] Disabling lock debugging due to kernel taint [ 38.416047][ T854] ip6_gre: GRE over IPv6 tunneling driver [ 51.174507][ T50] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 56.742358][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 59.686365][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 62.438353][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 65.575337][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured!