syzkaller login: [ 31.094488] BUG: Bad rss-counter state mm:000000003f8f7e39 type:MM_FILEPAGES val:33 [ 31.095558] BUG: Bad rss-counter state mm:000000003f8f7e39 type:MM_ANONPAGES val:22 [ 31.264955] ================================================================== [ 31.265867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.266806] Read of size 8 at addr ffff888015d0ca50 by task sshd/220 [ 31.267563] [ 31.267901] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.268772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.269759] Call Trace: [ 31.270078] [ 31.270361] dump_stack_lvl+0x91/0xf0 [ 31.270873] print_report+0xcc/0x620 [ 31.271357] ? __virt_addr_valid+0x102/0x340 [ 31.271946] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273201] kasan_report+0xbe/0xf0 [ 31.273680] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274319] vma_interval_tree_remove+0xc75/0xec0 [ 31.274962] vma_prepare+0xc54/0x11a0 [ 31.275460] __split_vma+0x5af/0x950 [ 31.275981] ? __pfx___split_vma+0x10/0x10 [ 31.276532] ? find_held_lock+0x2c/0x110 [ 31.277102] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.277701] ? lock_is_held_type+0x9f/0x120 [ 31.278292] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.278941] ? mtree_range_walk+0x632/0x900 [ 31.279532] ? mas_walk+0x5c7/0x7c0 [ 31.280069] do_vmi_munmap+0x1f1/0x2b0 [ 31.280577] mmap_region+0x1f9/0x2660 [ 31.281104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.281641] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.282408] ? __pfx_lock_acquire+0x10/0x10 [ 31.282978] ? __pfx_mmap_region+0x10/0x10 [ 31.283534] ? security_mmap_addr+0x7d/0xa0 [ 31.284110] ? get_unmapped_area+0x1f5/0x3f0 [ 31.284693] do_mmap+0x854/0xf00 [ 31.285165] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.285684] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.286274] ksys_mmap_pgoff+0x3af/0x500 [ 31.286824] do_syscall_64+0x3f/0x90 [ 31.287324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288025] RIP: 0033:0x7f7145226d82 [ 31.288507] 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 [ 31.290772] RSP: 002b:00007fff15ec8988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.291760] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7145226d82 [ 31.292650] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7144660000 [ 31.293557] RBP: 00007f7144660000 R08: 0000000000000009 R09: 0000000000001000 [ 31.294457] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fff5c26ec0 [ 31.295348] R13: 00007fff15ec89a0 R14: 00007fff15ec89d0 R15: 00007fff15ec8d30 [ 31.296293] [ 31.296599] [ 31.296848] Allocated by task 213: [ 31.297291] kasan_save_stack+0x22/0x50 [ 31.297832] kasan_set_track+0x25/0x30 [ 31.298352] __kasan_slab_alloc+0x59/0x70 [ 31.298913] kmem_cache_alloc+0x16b/0x370 [ 31.299461] vm_area_dup+0x20/0x160 [ 31.299963] __split_vma+0x170/0x950 [ 31.300455] split_vma+0xc6/0x110 [ 31.300938] mprotect_fixup+0x8d2/0xb30 [ 31.301469] do_mprotect_pkey+0x87e/0xd40 [ 31.302017] __x64_sys_mprotect+0x78/0xc0 [ 31.302559] do_syscall_64+0x3f/0x90 [ 31.303065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303775] [ 31.304000] Freed by task 213: [ 31.304401] kasan_save_stack+0x22/0x50 [ 31.304958] kasan_set_track+0x25/0x30 [ 31.305480] kasan_save_free_info+0x2b/0x50 [ 31.306043] __kasan_slab_free+0x10a/0x190 [ 31.306604] kmem_cache_free+0x10d/0x4d0 [ 31.307148] rcu_core+0x8c8/0x2860 [ 31.307619] __do_softirq+0x1b7/0x7d4 [ 31.308133] [ 31.308361] Last potentially related work creation: [ 31.308987] kasan_save_stack+0x22/0x50 [ 31.309505] __kasan_record_aux_stack+0x8e/0xa0 [ 31.310127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.310822] remove_vma+0x139/0x170 [ 31.311297] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311915] do_vmi_munmap+0x1f1/0x2b0 [ 31.312427] __vm_munmap+0x138/0x3a0 [ 31.312926] __x64_sys_munmap+0x59/0x80 [ 31.313457] do_syscall_64+0x3f/0x90 [ 31.313976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314643] [ 31.314891] The buggy address belongs to the object at ffff888015d0c9f8 [ 31.314891] which belongs to the cache vm_area_struct of size 168 [ 31.316453] The buggy address is located 88 bytes inside of [ 31.316453] freed 168-byte region [ffff888015d0c9f8, ffff888015d0caa0) [ 31.317953] [ 31.318179] The buggy address belongs to the physical page: [ 31.318878] page:0000000048eed1ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d0c [ 31.320062] memcg:ffff888017203201 [ 31.320504] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.321192] page_type: 0xffffffff() [ 31.321665] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.322643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017203201 [ 31.323598] page dumped because: kasan: bad access detected [ 31.324430] [ 31.324713] Memory state around the buggy address: [ 31.325474] ffff888015d0c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.326568] ffff888015d0c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.327660] >ffff888015d0ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.328777] ^ [ 31.329620] ffff888015d0ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.330538] ffff888015d0cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331519] ================================================================== [ 31.332567] Disabling lock debugging due to kernel taint [ 33.308761] BUG: Bad rss-counter state mm:000000005d405579 type:MM_FILEPAGES val:33 [ 33.310017] BUG: Bad rss-counter state mm:000000005d405579 type:MM_ANONPAGES val:22 [ 33.766624] BUG: Bad rss-counter state mm:000000007e73c837 type:MM_FILEPAGES val:33 [ 33.768189] BUG: Bad rss-counter state mm:000000007e73c837 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25584' (ECDSA) to the list of known hosts. 2023/06/21 10:06:13 fuzzer started 2023/06/21 10:06:13 dialing manager at localhost:36067 2023/06/21 10:06:13 checking machine... 2023/06/21 10:06:13 checking revisions... [ 34.498437] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:06:14 testing simple program... [ 34.553221] cgroup: Unknown subsys name 'net' [ 34.598706] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:06:13 Registers: info registers vcpu 0 RAX=ffff888016f14720 RBX=ffff88800844f780 RCX=0000000000000000 RDX=000000000000000c RSI=0000000000000130 RDI=ffff88800844f780 RBP=0000000000000007 RSP=ffff88800e4d7ae8 R8 =0000000000000001 R9 =0000000000000000 R10=ffff888016f14810 R11=00000000000b6a61 R12=ffffea00005bc500 R13=ffff888016f14720 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff81804856 RFL=00000202 [-------] 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 00007f7307ccb900 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=00007fff5b3a1000 CR3=0000000015d0e000 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=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 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=00007f31aa4c32b0 CR3=000000000fb1a000 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=2033313a36303a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000