syzkaller login: [ 38.802377] BUG: Bad rss-counter state mm:000000002877a54f type:MM_FILEPAGES val:33 [ 38.803620] BUG: Bad rss-counter state mm:000000002877a54f type:MM_ANONPAGES val:22 [ 38.839482] ================================================================== [ 38.840474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.841436] Read of size 8 at addr ffff88800d92ddf0 by task sshd/219 [ 38.842287] [ 38.842526] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.843427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.844461] Call Trace: [ 38.844799] [ 38.845095] dump_stack_lvl+0x91/0xf0 [ 38.845605] print_report+0xcc/0x620 [ 38.846122] ? __virt_addr_valid+0x102/0x340 [ 38.846719] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847359] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.848034] kasan_report+0xbe/0xf0 [ 38.848533] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849179] vma_interval_tree_remove+0xc75/0xec0 [ 38.849800] vma_prepare+0xc54/0x11a0 [ 38.850298] __split_vma+0x5af/0x950 [ 38.850811] ? __pfx___split_vma+0x10/0x10 [ 38.851363] ? find_held_lock+0x2c/0x110 [ 38.851957] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.852541] ? lock_is_held_type+0x9f/0x120 [ 38.853108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.853730] ? mtree_range_walk+0x632/0x900 [ 38.854306] ? mas_walk+0x5c7/0x7c0 [ 38.854821] do_vmi_munmap+0x1f1/0x2b0 [ 38.855336] mmap_region+0x1f9/0x2660 [ 38.855866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.856403] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.857156] ? __pfx_lock_acquire+0x10/0x10 [ 38.857722] ? __pfx_mmap_region+0x10/0x10 [ 38.858283] ? security_mmap_addr+0x7d/0xa0 [ 38.858870] ? get_unmapped_area+0x1f5/0x3f0 [ 38.859475] do_mmap+0x854/0xf00 [ 38.859948] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.860469] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.861055] ksys_mmap_pgoff+0x3af/0x500 [ 38.861582] do_syscall_64+0x3f/0x90 [ 38.862095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862784] RIP: 0033:0x7fc705dabd82 [ 38.863266] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.865510] RSP: 002b:00007ffe48134288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.866470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc705dabd82 [ 38.867370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7051e5000 [ 38.868288] RBP: 00007fc7051e5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.869175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8879acf70 [ 38.870059] R13: 00007ffe481342a0 R14: 00007ffe481342d0 R15: 00007ffe48134630 [ 38.870976] [ 38.871279] [ 38.871538] Allocated by task 212: [ 38.871988] kasan_save_stack+0x22/0x50 [ 38.872515] kasan_set_track+0x25/0x30 [ 38.873035] __kasan_slab_alloc+0x59/0x70 [ 38.873581] kmem_cache_alloc+0x16b/0x370 [ 38.874121] vm_area_dup+0x20/0x160 [ 38.874616] __split_vma+0x170/0x950 [ 38.875109] split_vma+0xc6/0x110 [ 38.875600] mprotect_fixup+0x8d2/0xb30 [ 38.876125] do_mprotect_pkey+0x87e/0xd40 [ 38.876676] __x64_sys_mprotect+0x78/0xc0 [ 38.877214] do_syscall_64+0x3f/0x90 [ 38.877708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878384] [ 38.878634] Freed by task 212: [ 38.879046] kasan_save_stack+0x22/0x50 [ 38.879607] kasan_set_track+0x25/0x30 [ 38.880120] kasan_save_free_info+0x2b/0x50 [ 38.880682] __kasan_slab_free+0x10a/0x190 [ 38.881236] kmem_cache_free+0x10d/0x4d0 [ 38.881765] rcu_core+0x8c8/0x2860 [ 38.882222] __do_softirq+0x1b7/0x7d4 [ 38.882739] [ 38.882960] Last potentially related work creation: [ 38.883601] kasan_save_stack+0x22/0x50 [ 38.884133] __kasan_record_aux_stack+0x8e/0xa0 [ 38.884735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.885397] remove_vma+0x139/0x170 [ 38.885871] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.886465] do_vmi_munmap+0x1f1/0x2b0 [ 38.886972] __vm_munmap+0x138/0x3a0 [ 38.887490] __x64_sys_munmap+0x59/0x80 [ 38.888008] do_syscall_64+0x3f/0x90 [ 38.888498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889169] [ 38.889391] Second to last potentially related work creation: [ 38.890119] kasan_save_stack+0x22/0x50 [ 38.890667] __kasan_record_aux_stack+0x8e/0xa0 [ 38.891263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.891973] remove_vma+0x139/0x170 [ 38.892520] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.893231] do_vmi_munmap+0x1f1/0x2b0 [ 38.893754] mmap_region+0x1f9/0x2660 [ 38.894260] do_mmap+0x854/0xf00 [ 38.894741] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895251] ksys_mmap_pgoff+0x3af/0x500 [ 38.895806] do_syscall_64+0x3f/0x90 [ 38.896302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896973] [ 38.897193] The buggy address belongs to the object at ffff88800d92dd98 [ 38.897193] which belongs to the cache vm_area_struct of size 168 [ 38.898762] The buggy address is located 88 bytes inside of [ 38.898762] freed 168-byte region [ffff88800d92dd98, ffff88800d92de40) [ 38.900246] [ 38.900470] The buggy address belongs to the physical page: [ 38.901160] page:000000003bcb04f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd92d [ 38.902298] memcg:ffff888009529401 [ 38.902800] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.903451] page_type: 0xffffffff() [ 38.903902] raw: 0100000000000200 ffff8880087a0c80 ffffea0000237280 dead000000000006 [ 38.904825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009529401 [ 38.905731] page dumped because: kasan: bad access detected [ 38.906428] [ 38.906667] Memory state around the buggy address: [ 38.907256] ffff88800d92dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.908114] ffff88800d92dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.908978] >ffff88800d92dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.909837] ^ [ 38.910721] ffff88800d92de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.911584] ffff88800d92de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.912444] ================================================================== [ 38.913632] Disabling lock debugging due to kernel taint [ 41.341796] BUG: Bad rss-counter state mm:0000000084d0b5be type:MM_FILEPAGES val:33 [ 41.343133] BUG: Bad rss-counter state mm:0000000084d0b5be type:MM_ANONPAGES val:22 [ 41.826044] BUG: Bad rss-counter state mm:000000008276e2e3 type:MM_FILEPAGES val:33 [ 41.827229] BUG: Bad rss-counter state mm:000000008276e2e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53475' (ECDSA) to the list of known hosts. 2023/06/21 05:34:37 fuzzer started 2023/06/21 05:34:38 dialing manager at localhost:36067 2023/06/21 05:34:38 checking machine... 2023/06/21 05:34:38 checking revisions... [ 42.531169] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:34:38 testing simple program... [ 42.580892] cgroup: Unknown subsys name 'net' [ 42.625506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:34:37 Registers: info registers vcpu 0 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcbc RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88806ce099e0 R8 =ffffffff86138976 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f39d86fd900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f39d8cb50b0 CR3=000000000e436000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffeef4c6828 CR3=000000000e7ac000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2037333a34333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000