syzkaller login: [ 29.090208] BUG: Bad rss-counter state mm:00000000fde2e1cc type:MM_FILEPAGES val:33 [ 29.091205] BUG: Bad rss-counter state mm:00000000fde2e1cc type:MM_ANONPAGES val:22 [ 29.245633] ================================================================== [ 29.246556] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.247506] Read of size 8 at addr ffff88801a099968 by task sshd/220 [ 29.248281] [ 29.248502] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.249554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.250532] Call Trace: [ 29.250863] [ 29.251148] dump_stack_lvl+0x91/0xf0 [ 29.251661] print_report+0xcc/0x620 [ 29.252155] ? __virt_addr_valid+0x102/0x340 [ 29.252718] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.253367] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.253990] kasan_report+0xbe/0xf0 [ 29.254470] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.255101] vma_interval_tree_remove+0xc75/0xec0 [ 29.255714] vma_prepare+0xc54/0x11a0 [ 29.256192] __split_vma+0x5af/0x950 [ 29.256663] ? __pfx___split_vma+0x10/0x10 [ 29.257218] ? find_held_lock+0x2c/0x110 [ 29.257745] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.258313] ? lock_is_held_type+0x9f/0x120 [ 29.258862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.259479] ? mtree_range_walk+0x632/0x900 [ 29.260043] ? mas_walk+0x5c7/0x7c0 [ 29.260518] do_vmi_munmap+0x1f1/0x2b0 [ 29.261023] mmap_region+0x1f9/0x2660 [ 29.261529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.262043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.262773] ? __pfx_lock_acquire+0x10/0x10 [ 29.263325] ? __pfx_mmap_region+0x10/0x10 [ 29.263862] ? security_mmap_addr+0x7d/0xa0 [ 29.264405] ? get_unmapped_area+0x1f5/0x3f0 [ 29.264974] do_mmap+0x854/0xf00 [ 29.265432] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.265944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.266525] ksys_mmap_pgoff+0x3af/0x500 [ 29.267035] do_syscall_64+0x3f/0x90 [ 29.267530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.268185] RIP: 0033:0x7fc5236a8d82 [ 29.268654] 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 [ 29.270835] RSP: 002b:00007ffc08cd8368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.271758] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5236a8d82 [ 29.272638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc522ae2000 [ 29.273521] RBP: 00007fc522ae2000 R08: 0000000000000009 R09: 0000000000001000 [ 29.274414] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559892006d90 [ 29.275291] R13: 00007ffc08cd8380 R14: 00007ffc08cd83b0 R15: 00007ffc08cd8710 [ 29.276158] [ 29.276452] [ 29.276670] Allocated by task 213: [ 29.277102] kasan_save_stack+0x22/0x50 [ 29.277619] kasan_set_track+0x25/0x30 [ 29.278130] __kasan_slab_alloc+0x59/0x70 [ 29.278668] kmem_cache_alloc+0x16b/0x370 [ 29.279191] vm_area_dup+0x20/0x160 [ 29.279641] __split_vma+0x170/0x950 [ 29.280115] split_vma+0xc6/0x110 [ 29.280556] mprotect_fixup+0x8d2/0xb30 [ 29.281072] do_mprotect_pkey+0x87e/0xd40 [ 29.281617] __x64_sys_mprotect+0x78/0xc0 [ 29.282138] do_syscall_64+0x3f/0x90 [ 29.282616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.283272] [ 29.283487] Freed by task 19: [ 29.283873] kasan_save_stack+0x22/0x50 [ 29.284379] kasan_set_track+0x25/0x30 [ 29.284877] kasan_save_free_info+0x2b/0x50 [ 29.285427] __kasan_slab_free+0x10a/0x190 [ 29.285962] kmem_cache_free+0x10d/0x4d0 [ 29.286487] rcu_core+0x8c8/0x2860 [ 29.286948] __do_softirq+0x1b7/0x7d4 [ 29.287431] [ 29.287648] Last potentially related work creation: [ 29.288238] kasan_save_stack+0x22/0x50 [ 29.288743] __kasan_record_aux_stack+0x8e/0xa0 [ 29.289325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.289973] remove_vma+0x139/0x170 [ 29.290478] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.291055] do_vmi_munmap+0x1f1/0x2b0 [ 29.291570] __vm_munmap+0x138/0x3a0 [ 29.292043] __x64_sys_munmap+0x59/0x80 [ 29.292540] do_syscall_64+0x3f/0x90 [ 29.293025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.293690] [ 29.293908] The buggy address belongs to the object at ffff88801a099910 [ 29.293908] which belongs to the cache vm_area_struct of size 168 [ 29.295395] The buggy address is located 88 bytes inside of [ 29.295395] freed 168-byte region [ffff88801a099910, ffff88801a0999b8) [ 29.296824] [ 29.297044] The buggy address belongs to the physical page: [ 29.297725] page:00000000996f4b8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a099 [ 29.298828] memcg:ffff88800dd1a001 [ 29.299262] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.299902] page_type: 0xffffffff() [ 29.300358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.301305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd1a001 [ 29.302208] page dumped because: kasan: bad access detected [ 29.302869] [ 29.303087] Memory state around the buggy address: [ 29.303666] ffff88801a099800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.304523] ffff88801a099880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.305392] >ffff88801a099900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.306243] ^ [ 29.307017] ffff88801a099980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.307897] ffff88801a099a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.308768] ================================================================== [ 29.309710] Disabling lock debugging due to kernel taint [ 31.130814] BUG: Bad rss-counter state mm:00000000965bc906 type:MM_FILEPAGES val:33 [ 31.131775] BUG: Bad rss-counter state mm:00000000965bc906 type:MM_ANONPAGES val:22 [ 31.623377] BUG: Bad rss-counter state mm:00000000c47ae60c type:MM_FILEPAGES val:33 [ 31.624763] BUG: Bad rss-counter state mm:00000000c47ae60c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55773' (ECDSA) to the list of known hosts. 2023/06/21 01:58:40 fuzzer started 2023/06/21 01:58:40 dialing manager at localhost:36067 2023/06/21 01:58:40 checking machine... 2023/06/21 01:58:40 checking revisions... [ 32.352439] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:58:40 testing simple program... [ 32.392365] cgroup: Unknown subsys name 'net' [ 32.459319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:58:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815345ff RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84512042 RSP=ffff88801ccaff18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801ccaff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534618 RFL=00000002 [-------] 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 00007f58665e1900 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=00007fffa48b9000 CR3=0000000017d5a000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007f4862437140 CR3=0000000014538000 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=2030343a38353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38353a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000