[ 105.238290][ T1738] br1: port 1(vx100) entered blocking state [ 105.238595][ T1738] br1: port 1(vx100) entered disabled state [ 105.238878][ T1738] vx100: entered allmulticast mode [ 105.241548][ T1738] vx100: entered promiscuous mode [ 105.242332][ T1738] br1: port 1(vx100) entered blocking state [ 105.242595][ T1738] br1: port 1(vx100) entered forwarding state [ 105.416859][ T1740] br1: port 2(veth1) entered blocking state [ 105.417134][ T1740] br1: port 2(veth1) entered disabled state [ 105.417416][ T1740] veth1: entered allmulticast mode [ 105.419442][ T1740] veth1: entered promiscuous mode [ 105.498922][ T39] br1: port 2(veth1) entered blocking state [ 105.499218][ T39] br1: port 2(veth1) entered forwarding state [ 105.658011][ T1743] br1: port 3(veth2) entered blocking state [ 105.658969][ T1743] br1: port 3(veth2) entered disabled state [ 105.659284][ T1743] veth2: entered allmulticast mode [ 105.661169][ T1743] veth2: entered promiscuous mode [ 105.758928][ T45] br1: port 3(veth2) entered blocking state [ 105.759286][ T45] br1: port 3(veth2) entered forwarding state [ 109.258498][ T1791] br2: port 1(w1) entered blocking state [ 109.258776][ T1791] br2: port 1(w1) entered disabled state [ 109.259061][ T1791] w1: entered allmulticast mode [ 109.262492][ T1791] w1: entered promiscuous mode [ 109.894312][ T1798] br2: port 2(vx100) entered blocking state [ 109.894888][ T1798] br2: port 2(vx100) entered disabled state [ 109.895354][ T1798] vx100: entered allmulticast mode [ 109.897976][ T1798] vx100: entered promiscuous mode [ 109.898553][ T1798] br2: port 2(vx100) entered blocking state [ 109.898817][ T1798] br2: port 2(vx100) entered forwarding state [ 110.587912][ T45] br2: port 1(w1) entered blocking state [ 110.588202][ T45] br2: port 1(w1) entered forwarding state [ 112.940132][ T1838] br2: port 1(w1) entered blocking state [ 112.940427][ T1838] br2: port 1(w1) entered disabled state [ 112.940682][ T1838] w1: entered allmulticast mode [ 112.942712][ T1838] w1: entered promiscuous mode [ 113.543502][ T1845] br2: port 2(vx100) entered blocking state [ 113.543869][ T1845] br2: port 2(vx100) entered disabled state [ 113.544204][ T1845] vx100: entered allmulticast mode [ 113.546971][ T1845] vx100: entered promiscuous mode [ 113.547601][ T1845] br2: port 2(vx100) entered blocking state [ 113.547891][ T1845] br2: port 2(vx100) entered forwarding state [ 114.237986][ T45] br2: port 1(w1) entered blocking state [ 114.238396][ T45] br2: port 1(w1) entered forwarding state [ 126.585953][ T67] vx100: left allmulticast mode [ 126.586345][ T67] vx100: left promiscuous mode [ 126.586732][ T67] br2: port 2(vx100) entered disabled state [ 126.590401][ T67] w1: left allmulticast mode [ 126.590616][ T67] w1: left promiscuous mode [ 126.590923][ T67] br2: port 1(w1) entered disabled state [ 127.000164][ T67] vx100: left allmulticast mode [ 127.000445][ T67] vx100: left promiscuous mode [ 127.000844][ T67] br2: port 2(vx100) entered disabled state [ 127.005813][ T67] w1: left allmulticast mode [ 127.006139][ T67] w1: left promiscuous mode [ 127.006640][ T67] br2: port 1(w1) entered disabled state [ 127.381304][ T67] ================================================================== [ 127.381577][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 127.381772][ T67] Read of size 8 at addr ffff88800e991a38 by task kworker/u16:1/67 [ 127.381956][ T67] [ 127.382023][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 127.382221][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 127.382383][ T67] Workqueue: netns cleanup_net [ 127.382523][ T67] Call Trace: [ 127.382671][ T67] [ 127.382748][ T67] dump_stack_lvl+0x82/0xd0 [ 127.382898][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 127.383099][ T67] ? cleanup_net+0x932/0xa40 [ 127.383231][ T67] print_report+0xb4/0x270 [ 127.383357][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 127.383482][ T67] kasan_report+0xbd/0xf0 [ 127.383599][ T67] ? cleanup_net+0x932/0xa40 [ 127.383778][ T67] cleanup_net+0x932/0xa40 [ 127.383925][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 127.384071][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 127.384236][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 127.384363][ T67] ? lock_acquire+0x32/0xc0 [ 127.384525][ T67] ? process_one_work+0xe0b/0x16d0 [ 127.384668][ T67] process_one_work+0xe55/0x16d0 [ 127.384801][ T67] ? __pfx___lock_release+0x10/0x10 [ 127.384925][ T67] ? __pfx_process_one_work+0x10/0x10 [ 127.385054][ T67] ? assign_work+0x16c/0x240 [ 127.385180][ T67] worker_thread+0x58c/0xce0 [ 127.385306][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 127.385462][ T67] ? __pfx_worker_thread+0x10/0x10 [ 127.385609][ T67] ? __pfx_worker_thread+0x10/0x10 [ 127.385760][ T67] kthread+0x28a/0x350 [ 127.385856][ T67] ? __pfx_kthread+0x10/0x10 [ 127.385983][ T67] ret_from_fork+0x31/0x70 [ 127.386143][ T67] ? __pfx_kthread+0x10/0x10 [ 127.386325][ T67] ret_from_fork_asm+0x1a/0x30 [ 127.386458][ T67] [ 127.386561][ T67] [ 127.386630][ T67] Allocated by task 1817: [ 127.386724][ T67] kasan_save_stack+0x24/0x50 [ 127.386859][ T67] kasan_save_track+0x14/0x30 [ 127.386984][ T67] __kasan_slab_alloc+0x59/0x70 [ 127.387108][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 127.387236][ T67] copy_net_ns+0xc6/0x340 [ 127.387334][ T67] create_new_namespaces+0x35f/0x920 [ 127.387461][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 127.387604][ T67] ksys_unshare+0x2a9/0x660 [ 127.387781][ T67] __x64_sys_unshare+0x31/0x40 [ 127.387929][ T67] do_syscall_64+0xc1/0x1d0 [ 127.388079][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 127.388237][ T67] [ 127.388305][ T67] Freed by task 67: [ 127.388398][ T67] kasan_save_stack+0x24/0x50 [ 127.388527][ T67] kasan_save_track+0x14/0x30 [ 127.388707][ T67] kasan_save_free_info+0x3b/0x60 [ 127.388843][ T67] __kasan_slab_free+0x38/0x50 [ 127.389007][ T67] kmem_cache_free+0xf8/0x330 [ 127.389168][ T67] cleanup_net+0x5a8/0xa40 [ 127.389297][ T67] process_one_work+0xe55/0x16d0 [ 127.389448][ T67] worker_thread+0x58c/0xce0 [ 127.389601][ T67] kthread+0x28a/0x350 [ 127.389696][ T67] ret_from_fork+0x31/0x70 [ 127.389824][ T67] ret_from_fork_asm+0x1a/0x30 [ 127.389953][ T67] [ 127.390051][ T67] The buggy address belongs to the object at ffff88800e991980 [ 127.390051][ T67] which belongs to the cache net_namespace of size 6080 [ 127.390409][ T67] The buggy address is located 184 bytes inside of [ 127.390409][ T67] freed 6080-byte region [ffff88800e991980, ffff88800e993140) [ 127.390716][ T67] [ 127.390783][ T67] The buggy address belongs to the physical page: [ 127.390943][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e9932c0 pfn:0xe990 [ 127.391195][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 127.391391][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 127.391608][ T67] page_type: f5(slab) [ 127.391709][ T67] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 127.391980][ T67] raw: ffff88800e9932c0 0000000000050002 00000001f5000000 0000000000000000 [ 127.392205][ T67] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 127.392499][ T67] head: ffff88800e9932c0 0000000000050002 00000001f5000000 0000000000000000 [ 127.392804][ T67] head: 0080000000000003 ffffea00003a6401 ffffffffffffffff 0000000000000000 [ 127.393089][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 127.393342][ T67] page dumped because: kasan: bad access detected [ 127.393530][ T67] [ 127.393637][ T67] Memory state around the buggy address: [ 127.393805][ T67] ffff88800e991900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 127.394023][ T67] ffff88800e991980: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.394224][ T67] >ffff88800e991a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.394431][ T67] ^ [ 127.394614][ T67] ffff88800e991a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.394819][ T67] ffff88800e991b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.395028][ T67] ================================================================== [ 127.395301][ T67] Disabling lock debugging due to kernel taint [ 128.751877][ T1967] br1: port 3(veth2) entered disabled state [ 128.815388][ T1968] veth2: left allmulticast mode [ 128.815583][ T1968] veth2: left promiscuous mode [ 128.815851][ T1968] br1: port 3(veth2) entered disabled state [ 128.936747][ T1970] br1: port 2(veth1) entered disabled state [ 128.985996][ T1971] veth1: left allmulticast mode [ 128.986234][ T1971] veth1: left promiscuous mode [ 128.986915][ T1971] br1: port 2(veth1) entered disabled state [ 129.060389][ T1972] vx100: left allmulticast mode [ 129.060602][ T1972] vx100: left promiscuous mode [ 129.060877][ T1972] br1: port 1(vx100) entered disabled state