syzkaller login: [ 44.478693] BUG: Bad rss-counter state mm:00000000bbe130d1 type:MM_FILEPAGES val:33 [ 44.480254] BUG: Bad rss-counter state mm:00000000bbe130d1 type:MM_ANONPAGES val:22 [ 44.647965] ================================================================== [ 44.648819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.649714] Read of size 8 at addr ffff888015b12798 by task sshd/221 [ 44.650442] [ 44.650653] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.651548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.652456] Call Trace: [ 44.652759] [ 44.653027] dump_stack_lvl+0x91/0xf0 [ 44.653515] print_report+0xcc/0x620 [ 44.653976] ? __virt_addr_valid+0x102/0x340 [ 44.654498] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.655080] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.655662] kasan_report+0xbe/0xf0 [ 44.656112] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.656695] vma_interval_tree_remove+0xc75/0xec0 [ 44.657263] vma_prepare+0xc54/0x11a0 [ 44.657728] __split_vma+0x5af/0x950 [ 44.658170] ? __pfx___split_vma+0x10/0x10 [ 44.658680] ? find_held_lock+0x2c/0x110 [ 44.659169] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.659704] ? lock_is_held_type+0x9f/0x120 [ 44.660225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.660826] ? mtree_range_walk+0x632/0x900 [ 44.661397] ? mas_walk+0x5c7/0x7c0 [ 44.661865] do_vmi_munmap+0x1f1/0x2b0 [ 44.662357] mmap_region+0x1f9/0x2660 [ 44.662845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.663354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.664054] ? __pfx_lock_acquire+0x10/0x10 [ 44.664585] ? __pfx_mmap_region+0x10/0x10 [ 44.665106] ? security_mmap_addr+0x7d/0xa0 [ 44.665640] ? get_unmapped_area+0x1f5/0x3f0 [ 44.666196] do_mmap+0x854/0xf00 [ 44.666629] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.667118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.667654] ksys_mmap_pgoff+0x3af/0x500 [ 44.668140] do_syscall_64+0x3f/0x90 [ 44.668592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.669206] RIP: 0033:0x7fde2e2edd82 [ 44.669652] 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 [ 44.671646] RSP: 002b:00007ffec6f55fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.672502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde2e2edd82 [ 44.673297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde2d727000 [ 44.674114] RBP: 00007fde2d727000 R08: 0000000000000009 R09: 0000000000001000 [ 44.674979] R10: 0000000000000812 R11: 0000000000000206 R12: 000055829ae18ec0 [ 44.675978] R13: 00007ffec6f55fc0 R14: 00007ffec6f55ff0 R15: 00007ffec6f56350 [ 44.676989] [ 44.677341] [ 44.677600] Allocated by task 214: [ 44.678104] kasan_save_stack+0x22/0x50 [ 44.678696] kasan_set_track+0x25/0x30 [ 44.679278] __kasan_slab_alloc+0x59/0x70 [ 44.679896] kmem_cache_alloc+0x16b/0x370 [ 44.680501] vm_area_dup+0x20/0x160 [ 44.681033] __split_vma+0x170/0x950 [ 44.681601] split_vma+0xc6/0x110 [ 44.682119] mprotect_fixup+0x8d2/0xb30 [ 44.682711] do_mprotect_pkey+0x87e/0xd40 [ 44.683323] __x64_sys_mprotect+0x78/0xc0 [ 44.683937] do_syscall_64+0x3f/0x90 [ 44.684494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.685249] [ 44.685510] Freed by task 214: [ 44.685972] kasan_save_stack+0x22/0x50 [ 44.686563] kasan_set_track+0x25/0x30 [ 44.687144] kasan_save_free_info+0x2b/0x50 [ 44.687773] __kasan_slab_free+0x10a/0x190 [ 44.688397] kmem_cache_free+0x10d/0x4d0 [ 44.688993] rcu_core+0x8c8/0x2860 [ 44.689534] __do_softirq+0x1b7/0x7d4 [ 44.690093] [ 44.690344] Last potentially related work creation: [ 44.691034] kasan_save_stack+0x22/0x50 [ 44.691626] __kasan_record_aux_stack+0x8e/0xa0 [ 44.692299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.693054] remove_vma+0x139/0x170 [ 44.693599] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.694256] do_vmi_munmap+0x1f1/0x2b0 [ 44.694828] __vm_munmap+0x138/0x3a0 [ 44.695379] __x64_sys_munmap+0x59/0x80 [ 44.695964] do_syscall_64+0x3f/0x90 [ 44.696486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.697202] [ 44.697465] The buggy address belongs to the object at ffff888015b12740 [ 44.697465] which belongs to the cache vm_area_struct of size 168 [ 44.699106] The buggy address is located 88 bytes inside of [ 44.699106] freed 168-byte region [ffff888015b12740, ffff888015b127e8) [ 44.700679] [ 44.700919] The buggy address belongs to the physical page: [ 44.701666] page:00000000379bbb42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b12 [ 44.702781] memcg:ffff888017643c01 [ 44.703214] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.703925] page_type: 0xffffffff() [ 44.704380] raw: 0100000000000200 ffff88800879fc80 ffffea000056c2c0 dead000000000003 [ 44.705307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017643c01 [ 44.706249] page dumped because: kasan: bad access detected [ 44.706924] [ 44.707141] Memory state around the buggy address: [ 44.707729] ffff888015b12680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.708597] ffff888015b12700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.709460] >ffff888015b12780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.710322] ^ [ 44.710824] ffff888015b12800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.711693] ffff888015b12880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.712544] ================================================================== [ 44.713576] Disabling lock debugging due to kernel taint [ 46.545603] BUG: Bad rss-counter state mm:00000000707fb33a type:MM_FILEPAGES val:33 [ 46.546304] BUG: Bad rss-counter state mm:00000000707fb33a type:MM_ANONPAGES val:22 [ 47.041499] BUG: Bad rss-counter state mm:00000000110c2637 type:MM_FILEPAGES val:33 [ 47.042512] BUG: Bad rss-counter state mm:00000000110c2637 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49110' (ECDSA) to the list of known hosts. 2023/06/19 13:52:41 fuzzer started 2023/06/19 13:52:42 dialing manager at localhost:44161 2023/06/19 13:52:42 checking machine... 2023/06/19 13:52:42 checking revisions... [ 47.780052] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:52:42 testing simple program... [ 47.849256] cgroup: Unknown subsys name 'net' [ 47.913006] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:52:27 Registers: info registers vcpu 0 RAX=ed73c4c8445f5f00 RBX=00005600b5f62880 RCX=00005600b60c2c80 RDX=0000000000000000 RSI=00005600b5f62880 RDI=00005600b5f64177 RBP=00005600b60c28c0 RSP=00007f992fff6960 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000001 R12=00005600b5f64177 R13=00005600b60c2e00 R14=00005600b60c2c80 R15=00005600b60c2e30 RIP=00005600b5f21ac8 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f992ffff700 00000000 00000000 GS =0000 0000000000000000 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=00007fea6d22d188 CR3=0000000008da6000 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=2031343a32353a3331203931206e754a XMM01=5f687373203a726f727265203a5d3933 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801874d1c0 RSI=ffffffff8363c7c7 RDI=0000000000000000 RBP=0000000000000010 RSP=ffff88800eff7e18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000009 R14=ffff88801999e1c0 R15=00000000ffffff9f RIP=ffffffff814c0800 RFL=00000246 [---Z-P-] 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 00007faf5d69f900 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=00007ffd40624000 CR3=0000000009482000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000