[ 14.049154][ T66] ================================================================== [ 14.049458][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.049658][ T66] Read of size 8 at addr ffff8880092d00f8 by task kworker/u16:1/66 [ 14.049846][ T66] [ 14.049914][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 14.050115][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.050277][ T66] Workqueue: netns cleanup_net [ 14.050408][ T66] Call Trace: [ 14.050508][ T66] [ 14.050576][ T66] dump_stack_lvl+0x82/0xd0 [ 14.050712][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 14.050873][ T66] ? cleanup_net+0xa5d/0xb90 [ 14.051000][ T66] print_report+0xb4/0x270 [ 14.051131][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 14.051260][ T66] kasan_report+0xbd/0xf0 [ 14.051358][ T66] ? cleanup_net+0xa5d/0xb90 [ 14.051487][ T66] cleanup_net+0xa5d/0xb90 [ 14.051615][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.051748][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 14.051876][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 14.052003][ T66] ? lock_acquire+0x32/0xc0 [ 14.052128][ T66] ? process_one_work+0xe0b/0x16d0 [ 14.052254][ T66] process_one_work+0xe55/0x16d0 [ 14.052380][ T66] ? __pfx___lock_release+0x10/0x10 [ 14.052505][ T66] ? __pfx_process_one_work+0x10/0x10 [ 14.052630][ T66] ? assign_work+0x16c/0x240 [ 14.052754][ T66] worker_thread+0x58c/0xce0 [ 14.052882][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 14.053039][ T66] ? __pfx_worker_thread+0x10/0x10 [ 14.053162][ T66] ? __pfx_worker_thread+0x10/0x10 [ 14.053292][ T66] kthread+0x28a/0x350 [ 14.053391][ T66] ? __pfx_kthread+0x10/0x10 [ 14.053516][ T66] ret_from_fork+0x31/0x70 [ 14.053641][ T66] ? __pfx_kthread+0x10/0x10 [ 14.053766][ T66] ret_from_fork_asm+0x1a/0x30 [ 14.053899][ T66] [ 14.054008][ T66] [ 14.054072][ T66] Allocated by task 253: [ 14.054166][ T66] kasan_save_stack+0x24/0x50 [ 14.054299][ T66] kasan_save_track+0x14/0x30 [ 14.054425][ T66] __kasan_slab_alloc+0x59/0x70 [ 14.054550][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.054679][ T66] copy_net_ns+0xc6/0x540 [ 14.054775][ T66] create_new_namespaces+0x35f/0x920 [ 14.054904][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.055029][ T66] ksys_unshare+0x2c4/0x6e0 [ 14.055159][ T66] __x64_sys_unshare+0x31/0x40 [ 14.055286][ T66] do_syscall_64+0xc1/0x1d0 [ 14.055412][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.055572][ T66] [ 14.055636][ T66] Freed by task 66: [ 14.055728][ T66] kasan_save_stack+0x24/0x50 [ 14.055856][ T66] kasan_save_track+0x14/0x30 [ 14.055978][ T66] kasan_save_free_info+0x3b/0x60 [ 14.056102][ T66] __kasan_slab_free+0x38/0x50 [ 14.056237][ T66] kmem_cache_free+0xf8/0x330 [ 14.056361][ T66] cleanup_net+0x5a8/0xb90 [ 14.056485][ T66] process_one_work+0xe55/0x16d0 [ 14.056607][ T66] worker_thread+0x58c/0xce0 [ 14.056729][ T66] kthread+0x28a/0x350 [ 14.056825][ T66] ret_from_fork+0x31/0x70 [ 14.056947][ T66] ret_from_fork_asm+0x1a/0x30 [ 14.057071][ T66] [ 14.057141][ T66] Last potentially related work creation: [ 14.057265][ T66] kasan_save_stack+0x24/0x50 [ 14.057391][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 14.057519][ T66] insert_work+0x34/0x230 [ 14.057612][ T66] __queue_work+0x5fd/0xa40 [ 14.057737][ T66] queue_delayed_work_on+0x8c/0xa0 [ 14.057862][ T66] __inet_insert_ifa+0x751/0xb10 [ 14.057991][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 14.058116][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 14.058244][ T66] netlink_rcv_skb+0x130/0x360 [ 14.058373][ T66] netlink_unicast+0x44b/0x710 [ 14.058498][ T66] netlink_sendmsg+0x723/0xbe0 [ 14.058626][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 14.058757][ T66] ___sys_sendmsg+0xee/0x170 [ 14.058886][ T66] __sys_sendmsg+0x109/0x1a0 [ 14.059019][ T66] do_syscall_64+0xc1/0x1d0 [ 14.059165][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.059329][ T66] [ 14.059403][ T66] Second to last potentially related work creation: [ 14.059557][ T66] kasan_save_stack+0x24/0x50 [ 14.059683][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 14.059809][ T66] insert_work+0x34/0x230 [ 14.059909][ T66] __queue_work+0x5fd/0xa40 [ 14.060042][ T66] queue_delayed_work_on+0x8c/0xa0 [ 14.060168][ T66] __inet_insert_ifa+0x751/0xb10 [ 14.060302][ T66] inetdev_event+0xb18/0xcf0 [ 14.060425][ T66] notifier_call_chain+0xcd/0x150 [ 14.060551][ T66] __dev_notify_flags+0xe6/0x250 [ 14.060680][ T66] dev_change_flags+0xec/0x160 [ 14.060812][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 14.060941][ T66] rtnl_newlink+0x6de/0xa80 [ 14.061069][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 14.061198][ T66] netlink_rcv_skb+0x130/0x360 [ 14.061334][ T66] netlink_unicast+0x44b/0x710 [ 14.061464][ T66] netlink_sendmsg+0x723/0xbe0 [ 14.061591][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 14.061719][ T66] ___sys_sendmsg+0xee/0x170 [ 14.061848][ T66] __sys_sendmsg+0x109/0x1a0 [ 14.061978][ T66] do_syscall_64+0xc1/0x1d0 [ 14.062105][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.062270][ T66] [ 14.062337][ T66] The buggy address belongs to the object at ffff8880092d0040 [ 14.062337][ T66] which belongs to the cache net_namespace of size 6528 [ 14.062673][ T66] The buggy address is located 184 bytes inside of [ 14.062673][ T66] freed 6528-byte region [ffff8880092d0040, ffff8880092d19c0) [ 14.062966][ T66] [ 14.063029][ T66] The buggy address belongs to the physical page: [ 14.063185][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880092d5140 pfn:0x92d0 [ 14.063435][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.063618][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.063776][ T66] page_type: f5(slab) [ 14.063878][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.064098][ T66] raw: ffff8880092d5140 0000000000040003 00000001f5000000 0000000000000000 [ 14.064319][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.064543][ T66] head: ffff8880092d5140 0000000000040003 00000001f5000000 0000000000000000 [ 14.064763][ T66] head: 0080000000000003 ffffea000024b401 ffffffffffffffff 0000000000000000 [ 14.064976][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.065200][ T66] page dumped because: kasan: bad access detected [ 14.065360][ T66] [ 14.065423][ T66] Memory state around the buggy address: [ 14.065546][ T66] ffff8880092cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.065738][ T66] ffff8880092d0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.065917][ T66] >ffff8880092d0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.066104][ T66] ^ [ 14.066282][ T66] ffff8880092d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.066456][ T66] ffff8880092d0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.066634][ T66] ================================================================== [ 14.066867][ T66] Disabling lock debugging due to kernel taint