syzkaller login: [ 31.113758] BUG: Bad rss-counter state mm:000000009ffd9aa8 type:MM_FILEPAGES val:33 [ 31.114983] BUG: Bad rss-counter state mm:000000009ffd9aa8 type:MM_ANONPAGES val:22 [ 31.261862] ================================================================== [ 31.262764] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.263704] Read of size 8 at addr ffff88801016d798 by task sshd/220 [ 31.264465] [ 31.264681] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.265616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.266593] Call Trace: [ 31.266931] [ 31.267216] dump_stack_lvl+0x91/0xf0 [ 31.267710] print_report+0xcc/0x620 [ 31.268199] ? __virt_addr_valid+0x102/0x340 [ 31.268752] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269371] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269992] kasan_report+0xbe/0xf0 [ 31.270470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271087] vma_interval_tree_remove+0xc75/0xec0 [ 31.271705] vma_prepare+0xc54/0x11a0 [ 31.272201] __split_vma+0x5af/0x950 [ 31.272690] ? __pfx___split_vma+0x10/0x10 [ 31.273221] ? find_held_lock+0x2c/0x110 [ 31.273775] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.274344] ? lock_is_held_type+0x9f/0x120 [ 31.274886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.275494] ? mtree_range_walk+0x632/0x900 [ 31.276073] ? mas_walk+0x5c7/0x7c0 [ 31.276566] do_vmi_munmap+0x1f1/0x2b0 [ 31.277068] mmap_region+0x1f9/0x2660 [ 31.277570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.278097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.278828] ? __pfx_lock_acquire+0x10/0x10 [ 31.279360] ? __pfx_mmap_region+0x10/0x10 [ 31.279902] ? security_mmap_addr+0x7d/0xa0 [ 31.280461] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281031] do_mmap+0x854/0xf00 [ 31.281493] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.282570] ksys_mmap_pgoff+0x3af/0x500 [ 31.283080] do_syscall_64+0x3f/0x90 [ 31.283577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284248] RIP: 0033:0x7f1e96819d82 [ 31.284710] 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 [ 31.286915] RSP: 002b:00007ffc31c0c6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.287833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e96819d82 [ 31.288704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e95c53000 [ 31.289576] RBP: 00007f1e95c53000 R08: 0000000000000009 R09: 0000000000001000 [ 31.290439] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558343fd3d90 [ 31.291312] R13: 00007ffc31c0c710 R14: 00007ffc31c0c740 R15: 00007ffc31c0caa0 [ 31.292207] [ 31.292506] [ 31.292733] Allocated by task 213: [ 31.293174] kasan_save_stack+0x22/0x50 [ 31.293733] kasan_set_track+0x25/0x30 [ 31.294250] __kasan_slab_alloc+0x59/0x70 [ 31.294782] kmem_cache_alloc+0x16b/0x370 [ 31.295297] vm_area_dup+0x20/0x160 [ 31.295755] __split_vma+0x170/0x950 [ 31.296224] split_vma+0xc6/0x110 [ 31.296666] mprotect_fixup+0x8d2/0xb30 [ 31.297172] do_mprotect_pkey+0x87e/0xd40 [ 31.297698] __x64_sys_mprotect+0x78/0xc0 [ 31.298220] do_syscall_64+0x3f/0x90 [ 31.298704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299357] [ 31.299572] Freed by task 213: [ 31.299982] kasan_save_stack+0x22/0x50 [ 31.300503] kasan_set_track+0x25/0x30 [ 31.300997] kasan_save_free_info+0x2b/0x50 [ 31.301557] __kasan_slab_free+0x10a/0x190 [ 31.302122] kmem_cache_free+0x10d/0x4d0 [ 31.302656] rcu_core+0x8c8/0x2860 [ 31.303104] __do_softirq+0x1b7/0x7d4 [ 31.303593] [ 31.303807] Last potentially related work creation: [ 31.304396] kasan_save_stack+0x22/0x50 [ 31.304902] __kasan_record_aux_stack+0x8e/0xa0 [ 31.305486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306158] remove_vma+0x139/0x170 [ 31.306634] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.307195] do_vmi_munmap+0x1f1/0x2b0 [ 31.307683] __vm_munmap+0x138/0x3a0 [ 31.308165] __x64_sys_munmap+0x59/0x80 [ 31.308683] do_syscall_64+0x3f/0x90 [ 31.309162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309841] [ 31.310063] Second to last potentially related work creation: [ 31.310751] kasan_save_stack+0x22/0x50 [ 31.311260] __kasan_record_aux_stack+0x8e/0xa0 [ 31.311836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.312485] remove_vma+0x139/0x170 [ 31.312953] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.313558] do_vmi_munmap+0x1f1/0x2b0 [ 31.314058] mmap_region+0x1f9/0x2660 [ 31.314538] do_mmap+0x854/0xf00 [ 31.314972] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.315467] ksys_mmap_pgoff+0x3af/0x500 [ 31.315968] do_syscall_64+0x3f/0x90 [ 31.316444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317083] [ 31.317297] The buggy address belongs to the object at ffff88801016d740 [ 31.317297] which belongs to the cache vm_area_struct of size 168 [ 31.318773] The buggy address is located 88 bytes inside of [ 31.318773] freed 168-byte region [ffff88801016d740, ffff88801016d7e8) [ 31.320185] [ 31.320398] The buggy address belongs to the physical page: [ 31.321059] page:000000001f84c0fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1016d [ 31.322206] memcg:ffff88800cb39601 [ 31.322632] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.323373] page_type: 0xffffffff() [ 31.323835] raw: 0100000000000200 ffff8880087a0c80 ffffea000059b480 dead000000000003 [ 31.324759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb39601 [ 31.325683] page dumped because: kasan: bad access detected [ 31.326338] [ 31.326555] Memory state around the buggy address: [ 31.327131] ffff88801016d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.327985] ffff88801016d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.328832] >ffff88801016d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.329732] ^ [ 31.330246] ffff88801016d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.331124] ffff88801016d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.332010] ================================================================== [ 31.333062] Disabling lock debugging due to kernel taint [ 33.950250] BUG: Bad rss-counter state mm:00000000fbe4385b type:MM_FILEPAGES val:33 [ 33.950931] BUG: Bad rss-counter state mm:00000000fbe4385b type:MM_ANONPAGES val:22 [ 34.410644] BUG: Bad rss-counter state mm:000000006641cdb3 type:MM_FILEPAGES val:33 [ 34.411655] BUG: Bad rss-counter state mm:000000006641cdb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59951' (ECDSA) to the list of known hosts. 2023/06/21 07:30:57 fuzzer started 2023/06/21 07:30:58 dialing manager at localhost:36067 2023/06/21 07:30:58 checking machine... 2023/06/21 07:30:58 checking revisions... [ 35.145468] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:30:58 testing simple program... [ 35.193066] cgroup: Unknown subsys name 'net' [ 35.237258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:30:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff864bce01 RDX=1ffff1100d9c136c RSI=ffffffff814c027c RDI=ffff88806ce09b6c RBP=000000000000000a RSP=ffff88806ce09a78 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888014598000 R15=ffff88800e731080 RIP=ffffffff813ad525 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fece4a54900 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=00007fece3eb38a0 CR3=000000000cc3e000 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=64657669656365523d4547415353454d XMM01=342074726f7020322e322e302e303120 XMM02=63736964203a31313a32303836342074 XMM03=66207463656e6e6f6373696420646576 XMM04=9915b7a83bc03cff00000000000ae988 XMM05=1319e678c5640f8a0000000000133680 XMM06=94aac670ef06ff6500000000001335e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110012757b5 RBX=ffff8880093abd78 RCX=1ffff1100273a6f8 RDX=dffffc0000000000 RSI=ffff888019d41b40 RDI=ffff8880093abda8 RBP=ffff8880139d3790 RSP=ffff888018effca8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019d41ac8 R13=0000000000000000 R14=ffff88800db992a8 R15=ffff88800db99260 RIP=ffffffff8184767e RFL=00000046 [---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 00007f432e383900 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=00007ffce1934000 CR3=000000000c97a000 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