syzkaller login: [ 31.274697] BUG: Bad rss-counter state mm:0000000034a57196 type:MM_FILEPAGES val:33 [ 31.275922] BUG: Bad rss-counter state mm:0000000034a57196 type:MM_ANONPAGES val:22 [ 31.316238] ================================================================== [ 31.317086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.318133] Read of size 8 at addr ffff88800e1ea5c8 by task sshd/219 [ 31.318875] [ 31.319083] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.319908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.320825] Call Trace: [ 31.321129] <TASK> [ 31.321402] dump_stack_lvl+0x91/0xf0 [ 31.321868] print_report+0xcc/0x620 [ 31.322327] ? __virt_addr_valid+0x102/0x340 [ 31.322868] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.324045] kasan_report+0xbe/0xf0 [ 31.324498] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325088] vma_interval_tree_remove+0xc75/0xec0 [ 31.325654] vma_prepare+0xc54/0x11a0 [ 31.326117] __split_vma+0x5af/0x950 [ 31.326592] ? __pfx___split_vma+0x10/0x10 [ 31.327140] ? find_held_lock+0x2c/0x110 [ 31.327664] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.328240] ? lock_is_held_type+0x9f/0x120 [ 31.328778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.329390] ? mtree_range_walk+0x632/0x900 [ 31.329942] ? mas_walk+0x5c7/0x7c0 [ 31.330421] do_vmi_munmap+0x1f1/0x2b0 [ 31.330925] mmap_region+0x1f9/0x2660 [ 31.331401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.331908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.332629] ? __pfx_lock_acquire+0x10/0x10 [ 31.333167] ? __pfx_mmap_region+0x10/0x10 [ 31.333698] ? security_mmap_addr+0x7d/0xa0 [ 31.334238] ? get_unmapped_area+0x1f5/0x3f0 [ 31.334803] do_mmap+0x854/0xf00 [ 31.335267] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.335759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.336316] ksys_mmap_pgoff+0x3af/0x500 [ 31.336825] do_syscall_64+0x3f/0x90 [ 31.337309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337949] RIP: 0033:0x7f11ec0f9d82 [ 31.338401] 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 [ 31.340530] RSP: 002b:00007ffd4e01a548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.341437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11ec0f9d82 [ 31.342284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11eb533000 [ 31.343145] RBP: 00007f11eb533000 R08: 0000000000000009 R09: 0000000000001000 [ 31.344029] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f32982ec0 [ 31.344885] R13: 00007ffd4e01a560 R14: 00007ffd4e01a590 R15: 00007ffd4e01a8f0 [ 31.345771] </TASK> [ 31.346065] [ 31.346286] Allocated by task 212: [ 31.346731] kasan_save_stack+0x22/0x50 [ 31.347240] kasan_set_track+0x25/0x30 [ 31.347741] __kasan_slab_alloc+0x59/0x70 [ 31.348265] kmem_cache_alloc+0x16b/0x370 [ 31.348778] vm_area_dup+0x20/0x160 [ 31.349236] __split_vma+0x170/0x950 [ 31.349718] split_vma+0xc6/0x110 [ 31.350160] mprotect_fixup+0x8d2/0xb30 [ 31.350675] do_mprotect_pkey+0x87e/0xd40 [ 31.351220] __x64_sys_mprotect+0x78/0xc0 [ 31.351761] do_syscall_64+0x3f/0x90 [ 31.352252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.352903] [ 31.353124] Freed by task 212: [ 31.353528] kasan_save_stack+0x22/0x50 [ 31.354037] kasan_set_track+0x25/0x30 [ 31.354538] kasan_save_free_info+0x2b/0x50 [ 31.355097] __kasan_slab_free+0x10a/0x190 [ 31.355639] kmem_cache_free+0x10d/0x4d0 [ 31.356158] rcu_core+0x8c8/0x2860 [ 31.356608] __do_softirq+0x1b7/0x7d4 [ 31.357099] [ 31.357320] Last potentially related work creation: [ 31.357914] kasan_save_stack+0x22/0x50 [ 31.358427] __kasan_record_aux_stack+0x8e/0xa0 [ 31.359017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.359669] remove_vma+0x139/0x170 [ 31.360127] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.360693] do_vmi_munmap+0x1f1/0x2b0 [ 31.361184] __vm_munmap+0x138/0x3a0 [ 31.361657] __x64_sys_munmap+0x59/0x80 [ 31.362183] do_syscall_64+0x3f/0x90 [ 31.362663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.363337] [ 31.363557] Second to last potentially related work creation: [ 31.364262] kasan_save_stack+0x22/0x50 [ 31.364778] __kasan_record_aux_stack+0x8e/0xa0 [ 31.365370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366022] remove_vma+0x139/0x170 [ 31.366481] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367058] do_vmi_munmap+0x1f1/0x2b0 [ 31.367552] mmap_region+0x1f9/0x2660 [ 31.368033] do_mmap+0x854/0xf00 [ 31.368469] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.368966] ksys_mmap_pgoff+0x7d/0x500 [ 31.369466] do_syscall_64+0x3f/0x90 [ 31.369949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370604] [ 31.370837] The buggy address belongs to the object at ffff88800e1ea570 [ 31.370837] which belongs to the cache vm_area_struct of size 168 [ 31.372343] The buggy address is located 88 bytes inside of [ 31.372343] freed 168-byte region [ffff88800e1ea570, ffff88800e1ea618) [ 31.373777] [ 31.373993] The buggy address belongs to the physical page: [ 31.374661] page:000000008029f116 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ea [ 31.375772] memcg:ffff88800e2f3501 [ 31.376207] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.376910] page_type: 0xffffffff() [ 31.377367] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.378293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2f3501 [ 31.379252] page dumped because: kasan: bad access detected [ 31.379923] [ 31.380143] Memory state around the buggy address: [ 31.380735] ffff88800e1ea480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.381597] ffff88800e1ea500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.382456] >ffff88800e1ea580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.383329] ^ [ 31.384001] ffff88800e1ea600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.384869] ffff88800e1ea680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.385733] ================================================================== [ 31.386761] Disabling lock debugging due to kernel taint [ 33.327078] BUG: Bad rss-counter state mm:00000000631f6eff type:MM_FILEPAGES val:33 [ 33.328107] BUG: Bad rss-counter state mm:00000000631f6eff type:MM_ANONPAGES val:22 [ 33.823071] BUG: Bad rss-counter state mm:00000000a125bafa type:MM_FILEPAGES val:33 [ 33.823769] BUG: Bad rss-counter state mm:00000000a125bafa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35724' (ECDSA) to the list of known hosts. 2023/06/21 05:49:17 fuzzer started 2023/06/21 05:49:17 dialing manager at localhost:36067 2023/06/21 05:49:17 checking machine... 2023/06/21 05:49:17 checking revisions... [ 34.498980] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:49:17 testing simple program... [ 34.551865] cgroup: Unknown subsys name 'net' [ 34.590591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:49:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110039a4f12 RSI=ffff88801cd27c40 RDI=ffff88801cd27898 RBP=ffff888019e2c800 RSP=ffff88801cd277d8 R8 =0000000000000001 R9 =ffff88801cd27888 R10=0000000000038001 R11=000000000008af38 R12=ffff88801cd278a8 R13=ffff88801cd27890 R14=ffff88801cd27c40 R15=ffff88801cd27848 RIP=ffffffff81131c60 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 00007ff145d33900 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=00007f5836e35050 CR3=000000000e8ba000 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=2036313a39343a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a39343a3530203132 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=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=00007ffe59c47708 CR3=000000000e4d8000 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=39343a3530203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732036313a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303034 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000