syzkaller login: [ 30.393597] BUG: Bad rss-counter state mm:000000003bcad75b type:MM_FILEPAGES val:33 [ 30.395211] BUG: Bad rss-counter state mm:000000003bcad75b type:MM_ANONPAGES val:22 [ 30.567426] ================================================================== [ 30.568392] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.569332] Read of size 8 at addr ffff88800fc6a968 by task sshd/220 [ 30.570303] [ 30.570527] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.571411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.572392] Call Trace: [ 30.572719] [ 30.573036] dump_stack_lvl+0x91/0xf0 [ 30.573533] print_report+0xcc/0x620 [ 30.574058] ? __virt_addr_valid+0x102/0x340 [ 30.574633] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.575262] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.575874] kasan_report+0xbe/0xf0 [ 30.576350] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.577012] vma_interval_tree_remove+0xc75/0xec0 [ 30.577626] vma_prepare+0xc54/0x11a0 [ 30.578162] __split_vma+0x5af/0x950 [ 30.578644] ? __pfx___split_vma+0x10/0x10 [ 30.579203] ? find_held_lock+0x2c/0x110 [ 30.579723] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.580292] ? lock_is_held_type+0x9f/0x120 [ 30.580837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.581492] ? mtree_range_walk+0x632/0x900 [ 30.582096] ? mas_walk+0x5c7/0x7c0 [ 30.582602] do_vmi_munmap+0x1f1/0x2b0 [ 30.583114] mmap_region+0x1f9/0x2660 [ 30.583600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.584118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.584837] ? __pfx_lock_acquire+0x10/0x10 [ 30.585416] ? __pfx_mmap_region+0x10/0x10 [ 30.585972] ? security_mmap_addr+0x7d/0xa0 [ 30.586554] ? get_unmapped_area+0x1f5/0x3f0 [ 30.587123] do_mmap+0x854/0xf00 [ 30.587561] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.588057] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.588621] ksys_mmap_pgoff+0x3af/0x500 [ 30.589179] do_syscall_64+0x3f/0x90 [ 30.589672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.590386] RIP: 0033:0x7fbbc9415d82 [ 30.590851] 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 [ 30.592972] RSP: 002b:00007ffced135f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.593881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbc9415d82 [ 30.594763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbc884f000 [ 30.595694] RBP: 00007fbbc884f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.596535] R10: 0000000000000812 R11: 0000000000000206 R12: 000056313dd51ec0 [ 30.597381] R13: 00007ffced135fb0 R14: 00007ffced135fe0 R15: 00007ffced136340 [ 30.598253] [ 30.598543] [ 30.598758] Allocated by task 213: [ 30.599256] kasan_save_stack+0x22/0x50 [ 30.599758] kasan_set_track+0x25/0x30 [ 30.600248] __kasan_slab_alloc+0x59/0x70 [ 30.600774] kmem_cache_alloc+0x16b/0x370 [ 30.601291] vm_area_dup+0x20/0x160 [ 30.601747] __split_vma+0x170/0x950 [ 30.602210] split_vma+0xc6/0x110 [ 30.602651] mprotect_fixup+0x8d2/0xb30 [ 30.603173] do_mprotect_pkey+0x87e/0xd40 [ 30.603692] __x64_sys_mprotect+0x78/0xc0 [ 30.604214] do_syscall_64+0x3f/0x90 [ 30.604693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.605346] [ 30.605561] Freed by task 213: [ 30.605958] kasan_save_stack+0x22/0x50 [ 30.606469] kasan_set_track+0x25/0x30 [ 30.606977] kasan_save_free_info+0x2b/0x50 [ 30.607510] __kasan_slab_free+0x10a/0x190 [ 30.608055] kmem_cache_free+0x10d/0x4d0 [ 30.608567] rcu_core+0x8c8/0x2860 [ 30.609013] __do_softirq+0x1b7/0x7d4 [ 30.609490] [ 30.609711] Last potentially related work creation: [ 30.610300] kasan_save_stack+0x22/0x50 [ 30.610811] __kasan_record_aux_stack+0x8e/0xa0 [ 30.611469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.612158] remove_vma+0x139/0x170 [ 30.612623] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.613177] do_vmi_munmap+0x1f1/0x2b0 [ 30.613659] __vm_munmap+0x138/0x3a0 [ 30.614171] __x64_sys_munmap+0x59/0x80 [ 30.614664] do_syscall_64+0x3f/0x90 [ 30.615213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615858] [ 30.616075] Second to last potentially related work creation: [ 30.616747] kasan_save_stack+0x22/0x50 [ 30.617294] __kasan_record_aux_stack+0x8e/0xa0 [ 30.617874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.618573] remove_vma+0x139/0x170 [ 30.619041] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.619598] __do_sys_brk+0x90d/0xc70 [ 30.620071] do_syscall_64+0x3f/0x90 [ 30.620548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.621232] [ 30.621447] The buggy address belongs to the object at ffff88800fc6a910 [ 30.621447] which belongs to the cache vm_area_struct of size 168 [ 30.622972] The buggy address is located 88 bytes inside of [ 30.622972] freed 168-byte region [ffff88800fc6a910, ffff88800fc6a9b8) [ 30.624369] [ 30.624584] The buggy address belongs to the physical page: [ 30.625238] page:000000004f6452fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc6a [ 30.626350] memcg:ffff8880141c4c01 [ 30.626769] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.627562] page_type: 0xffffffff() [ 30.628006] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c840 0000000000000009 [ 30.628915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880141c4c01 [ 30.629865] page dumped because: kasan: bad access detected [ 30.630573] [ 30.630788] Memory state around the buggy address: [ 30.631378] ffff88800fc6a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.632227] ffff88800fc6a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.633099] >ffff88800fc6a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.633953] ^ [ 30.634731] ffff88800fc6a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.635590] ffff88800fc6aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.636432] ================================================================== [ 30.637370] Disabling lock debugging due to kernel taint [ 33.275019] BUG: Bad rss-counter state mm:00000000ac32ba0d type:MM_FILEPAGES val:33 [ 33.276523] BUG: Bad rss-counter state mm:00000000ac32ba0d type:MM_ANONPAGES val:22 [ 33.751553] BUG: Bad rss-counter state mm:00000000cf00b236 type:MM_FILEPAGES val:33 [ 33.752547] BUG: Bad rss-counter state mm:00000000cf00b236 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53967' (ECDSA) to the list of known hosts. 2023/06/20 23:20:05 fuzzer started 2023/06/20 23:20:05 dialing manager at localhost:36067 2023/06/20 23:20:05 checking machine... 2023/06/20 23:20:05 checking revisions... [ 34.492602] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:20:05 testing simple program... [ 34.544450] cgroup: Unknown subsys name 'net' [ 34.594737] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:20:05 Registers: info registers vcpu 0 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcb8 RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88806ce099e0 R8 =ffffffff86138976 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcb8 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f6991aaf700 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=00007f902f9200b0 CR3=0000000019636000 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=2035303a30323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a30323a3332203032 XMM08=3d656e696c646d632022656369767265 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=00007f3a0557a450 CR3=000000000c880000 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=00000000000000000000000000000000 XMM01=9c2c2ca6bcf8e989d444e00af99ad049 XMM02=000000000011f408ec2efd57dc4c00df XMM03=00000000001227b0d642632759999624 XMM04=3b72b0b69576d31f00000000000ae988 XMM05=7e774c9f517754d70000000000134280 XMM06=4fda316b135da52b0000000000133320 XMM07=e042d86d42eb936e0000000000122a30 XMM08=d642632759999624000000000011f468 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000