[ 146.883788][ T2495] netdevsim netdevsim10 eni10np2: renamed from eth1 [ 146.909790][ T2427] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 147.039616][ T2499] netdevsim netdevsim10 eni10np3: renamed from eth2 [ 152.648081][ T2502] netdevsim netdevsim10 eni10np4: renamed from eth3 [ 152.650054][ T2507] devlink (2507) used greatest stack depth: 22160 bytes left [ 176.927580][ T2567] netdevsim netdevsim10 eni10np3: renamed from eth2 [ 177.045046][ T2554] netdevsim netdevsim10 eni10np2: renamed from eth1 [ 177.149274][ T2555] netdevsim netdevsim10 eni10np4: renamed from eth3 [ 177.273870][ T2563] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 179.970501][ T2555] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 180.442444][ T2561] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 180.927738][ T2561] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 181.185735][ T2555] netdevsim netdevsim10 eni10np4: renamed from eth3 [ 181.988716][ T11] ================================================================== [ 181.988939][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 181.989134][ T11] Read of size 8 at addr ffff88800e2200f8 by task kworker/u16:0/11 [ 181.989227][ T2555] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 181.989314][ T11] [ 181.989317][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 181.989805][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 181.989962][ T11] Workqueue: netns cleanup_net [ 181.990104][ T11] Call Trace: [ 181.990207][ T11] [ 181.990278][ T11] dump_stack_lvl+0x82/0xd0 [ 181.990418][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 181.990580][ T11] ? cleanup_net+0x932/0xa40 [ 181.990719][ T11] print_report+0xb4/0x270 [ 181.990850][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 181.990983][ T11] kasan_report+0xbd/0xf0 [ 181.991086][ T11] ? cleanup_net+0x932/0xa40 [ 181.991220][ T11] cleanup_net+0x932/0xa40 [ 181.991358][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 181.991488][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 181.991621][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 181.991747][ T11] ? lock_acquire+0x32/0xc0 [ 181.991888][ T11] ? process_one_work+0xe0b/0x16d0 [ 181.992032][ T11] process_one_work+0xe55/0x16d0 [ 181.992168][ T11] ? __pfx___lock_release+0x10/0x10 [ 181.992307][ T11] ? __pfx_process_one_work+0x10/0x10 [ 181.992437][ T11] ? assign_work+0x16c/0x240 [ 181.992576][ T11] worker_thread+0x58c/0xce0 [ 181.992753][ T11] ? __pfx_worker_thread+0x10/0x10 [ 181.992922][ T11] kthread+0x28a/0x350 [ 181.993023][ T11] ? __pfx_kthread+0x10/0x10 [ 181.993154][ T11] ret_from_fork+0x31/0x70 [ 181.993280][ T11] ? __pfx_kthread+0x10/0x10 [ 181.993411][ T11] ret_from_fork_asm+0x1a/0x30 [ 181.993546][ T11] [ 181.993643][ T11] [ 181.993710][ T11] Allocated by task 244: [ 181.993812][ T11] kasan_save_stack+0x24/0x50 [ 181.993961][ T11] kasan_save_track+0x14/0x30 [ 181.994093][ T11] __kasan_slab_alloc+0x59/0x70 [ 181.994238][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 181.994377][ T11] copy_net_ns+0xc6/0x340 [ 181.994475][ T11] create_new_namespaces+0x35f/0x920 [ 181.994604][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 181.994735][ T11] ksys_unshare+0x2a9/0x660 [ 181.994876][ T11] __x64_sys_unshare+0x31/0x40 [ 181.995019][ T11] do_syscall_64+0xc1/0x1d0 [ 181.995163][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 181.995334][ T11] [ 181.995408][ T11] Freed by task 11: [ 181.995520][ T11] kasan_save_stack+0x24/0x50 [ 181.995662][ T11] kasan_save_track+0x14/0x30 [ 181.995800][ T11] kasan_save_free_info+0x3b/0x60 [ 181.995944][ T11] __kasan_slab_free+0x38/0x50 [ 181.996085][ T11] kmem_cache_free+0xf8/0x330 [ 181.996229][ T11] cleanup_net+0x5a8/0xa40 [ 181.996372][ T11] process_one_work+0xe55/0x16d0 [ 181.996518][ T11] worker_thread+0x58c/0xce0 [ 181.996656][ T11] kthread+0x28a/0x350 [ 181.996761][ T11] ret_from_fork+0x31/0x70 [ 181.996900][ T11] ret_from_fork_asm+0x1a/0x30 [ 181.997044][ T11] [ 181.997196][ T11] The buggy address belongs to the object at ffff88800e220040 [ 181.997196][ T11] which belongs to the cache net_namespace of size 5696 [ 181.997553][ T11] The buggy address is located 184 bytes inside of [ 181.997553][ T11] freed 5696-byte region [ffff88800e220040, ffff88800e221680) [ 181.997852][ T11] [ 181.997916][ T11] The buggy address belongs to the physical page: [ 181.998090][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e224780 pfn:0xe220 [ 181.998369][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 181.998559][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 181.998719][ T11] page_type: f5(slab) [ 181.998819][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 181.999050][ T11] raw: ffff88800e224780 0000000000050003 00000001f5000000 0000000000000000 [ 181.999275][ T11] head: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 181.999496][ T11] head: ffff88800e224780 0000000000050003 00000001f5000000 0000000000000000 [ 181.999718][ T11] head: 0080000000000003 ffffea0000388801 ffffffffffffffff 0000000000000000 [ 182.000037][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 182.000335][ T11] page dumped because: kasan: bad access detected [ 182.000525][ T11] [ 182.000594][ T11] Memory state around the buggy address: [ 182.000737][ T11] ffff88800e21ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 182.000922][ T11] ffff88800e220000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 182.001107][ T11] >ffff88800e220080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 182.001289][ T11] ^ [ 182.001477][ T11] ffff88800e220100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 182.001664][ T11] ffff88800e220180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 182.001916][ T11] ================================================================== [ 182.002165][ T11] Disabling lock debugging due to kernel taint [ 182.058434][ T2563] netdevsim netdevsim10 eni10np4: renamed from eth3 [ 182.200531][ T2554] netdevsim netdevsim10 eni10np3: renamed from eth2 [ 182.273548][ T2567] netdevsim netdevsim10 eni10np2: renamed from eth1 [ 184.128528][ T2771] Failed to register fib notifier [ 184.408894][ T2554] netdevsim netdevsim10 eni10np3: renamed from eth2 [ 184.538704][ T2567] netdevsim netdevsim10 eni10np2: renamed from eth1 [ 184.626958][ T2563] netdevsim netdevsim10 eni10np4: renamed from eth3 [ 184.729084][ T2555] netdevsim netdevsim10 eni10np1: renamed from eth0 [ 189.691649][ T3018] netdevsim netdevsim10 eni10npf0vf0: renamed from eth0 [ 189.709974][ T3024] netdevsim netdevsim10 eni10npf0vf3: renamed from eth3 [ 189.841016][ T3020] netdevsim netdevsim10 eni10npf0vf1: renamed from eth1 [ 189.941291][ T3022] netdevsim netdevsim10 eni10npf0vf2: renamed from eth2