syzkaller login: [ 32.420460] BUG: Bad rss-counter state mm:00000000241878fc type:MM_FILEPAGES val:33 [ 32.421710] BUG: Bad rss-counter state mm:00000000241878fc type:MM_ANONPAGES val:22 [ 32.503566] ================================================================== [ 32.504504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.505457] Read of size 8 at addr ffff88800cc61ed8 by task sshd/220 [ 32.506302] [ 32.506518] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.507394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.508386] Call Trace: [ 32.508704] [ 32.508993] dump_stack_lvl+0x91/0xf0 [ 32.509480] print_report+0xcc/0x620 [ 32.509965] ? __virt_addr_valid+0x102/0x340 [ 32.510516] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.511147] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.511762] kasan_report+0xbe/0xf0 [ 32.512237] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.512854] vma_interval_tree_remove+0xc75/0xec0 [ 32.513448] vma_prepare+0xc54/0x11a0 [ 32.513928] __split_vma+0x5af/0x950 [ 32.514394] ? __pfx___split_vma+0x10/0x10 [ 32.514921] ? find_held_lock+0x2c/0x110 [ 32.515464] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.516023] ? lock_is_held_type+0x9f/0x120 [ 32.516556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.517167] ? mtree_range_walk+0x632/0x900 [ 32.517714] ? mas_walk+0x5c7/0x7c0 [ 32.518182] do_vmi_munmap+0x1f1/0x2b0 [ 32.518671] mmap_region+0x1f9/0x2660 [ 32.519164] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.519677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.520385] ? __pfx_lock_acquire+0x10/0x10 [ 32.520912] ? __pfx_mmap_region+0x10/0x10 [ 32.521444] ? security_mmap_addr+0x7d/0xa0 [ 32.521981] ? get_unmapped_area+0x1f5/0x3f0 [ 32.522533] do_mmap+0x854/0xf00 [ 32.522976] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.523482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.524057] ksys_mmap_pgoff+0x3af/0x500 [ 32.524568] do_syscall_64+0x3f/0x90 [ 32.525045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.525696] RIP: 0033:0x7fd255d84d82 [ 32.526150] 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 [ 32.528312] RSP: 002b:00007ffdddfb6028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.529225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd255d84d82 [ 32.530069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2551be000 [ 32.530914] RBP: 00007fd2551be000 R08: 0000000000000009 R09: 0000000000001000 [ 32.531767] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f0d78aec0 [ 32.532608] R13: 00007ffdddfb6040 R14: 00007ffdddfb6070 R15: 00007ffdddfb63d0 [ 32.533457] [ 32.533749] [ 32.533965] Allocated by task 213: [ 32.534391] kasan_save_stack+0x22/0x50 [ 32.534896] kasan_set_track+0x25/0x30 [ 32.535406] __kasan_slab_alloc+0x59/0x70 [ 32.535926] kmem_cache_alloc+0x16b/0x370 [ 32.536441] vm_area_dup+0x20/0x160 [ 32.536922] __split_vma+0x170/0x950 [ 32.537385] split_vma+0xc6/0x110 [ 32.537824] mprotect_fixup+0x8d2/0xb30 [ 32.538321] do_mprotect_pkey+0x87e/0xd40 [ 32.538845] __x64_sys_mprotect+0x78/0xc0 [ 32.539377] do_syscall_64+0x3f/0x90 [ 32.539858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.540498] [ 32.540711] Freed by task 19: [ 32.541089] kasan_save_stack+0x22/0x50 [ 32.541585] kasan_set_track+0x25/0x30 [ 32.542073] kasan_save_free_info+0x2b/0x50 [ 32.542603] __kasan_slab_free+0x10a/0x190 [ 32.543151] kmem_cache_free+0x10d/0x4d0 [ 32.543665] rcu_core+0x8c8/0x2860 [ 32.544106] __do_softirq+0x1b7/0x7d4 [ 32.544589] [ 32.544806] Last potentially related work creation: [ 32.545401] kasan_save_stack+0x22/0x50 [ 32.545904] __kasan_record_aux_stack+0x8e/0xa0 [ 32.546479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.547145] remove_vma+0x139/0x170 [ 32.547602] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.548161] do_vmi_munmap+0x1f1/0x2b0 [ 32.548647] __vm_munmap+0x138/0x3a0 [ 32.549117] __x64_sys_munmap+0x59/0x80 [ 32.549615] do_syscall_64+0x3f/0x90 [ 32.550094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.550736] [ 32.550951] The buggy address belongs to the object at ffff88800cc61e80 [ 32.550951] which belongs to the cache vm_area_struct of size 168 [ 32.552426] The buggy address is located 88 bytes inside of [ 32.552426] freed 168-byte region [ffff88800cc61e80, ffff88800cc61f28) [ 32.553827] [ 32.554043] The buggy address belongs to the physical page: [ 32.554704] page:000000009f083693 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc61 [ 32.555802] memcg:ffff88800e0ef601 [ 32.556232] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.556877] page_type: 0xffffffff() [ 32.557329] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.558248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0ef601 [ 32.559164] page dumped because: kasan: bad access detected [ 32.559827] [ 32.560050] Memory state around the buggy address: [ 32.560633] ffff88800cc61d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.561488] ffff88800cc61e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.562345] >ffff88800cc61e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.563203] ^ [ 32.563931] ffff88800cc61f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.564789] ffff88800cc61f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.565645] ================================================================== [ 32.566641] Disabling lock debugging due to kernel taint [ 34.504790] BUG: Bad rss-counter state mm:00000000c9440414 type:MM_FILEPAGES val:33 [ 34.505768] BUG: Bad rss-counter state mm:00000000c9440414 type:MM_ANONPAGES val:22 [ 35.047189] BUG: Bad rss-counter state mm:00000000c63496ed type:MM_FILEPAGES val:33 [ 35.048200] BUG: Bad rss-counter state mm:00000000c63496ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6566' (ECDSA) to the list of known hosts. 2023/06/20 05:25:59 fuzzer started 2023/06/20 05:25:59 dialing manager at localhost:44161 2023/06/20 05:25:59 checking machine... 2023/06/20 05:25:59 checking revisions... [ 35.713883] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:25:59 testing simple program... [ 35.757250] cgroup: Unknown subsys name 'net' [ 35.803609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:58 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff88800963f4e0 RCX=ffffffff818e993f RDX=0000000000000040 RSI=0000000000000004 RDI=0000000000000004 RBP=0000000000000004 RSP=ffff8880159bfd50 R8 =0000000000000004 R9 =0000000000000004 R10=0000000000000040 R11=0000000000000000 R12=ffff88800963f480 R13=0000000000000040 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c01d0 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 00007f65ef065900 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=00007f65ef61d0b0 CR3=000000000f0f0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd1499f808 CR3=000000000f262000 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=2039353a35323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a35323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000