syzkaller login: [ 30.077277] BUG: Bad rss-counter state mm:00000000a6c70152 type:MM_FILEPAGES val:33 [ 30.079044] BUG: Bad rss-counter state mm:00000000a6c70152 type:MM_ANONPAGES val:22 [ 30.253338] ================================================================== [ 30.254450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.255589] Read of size 8 at addr ffff88801a183ed8 by task sshd/222 [ 30.256616] [ 30.256851] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.257740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.258795] Call Trace: [ 30.259115] [ 30.259412] dump_stack_lvl+0x91/0xf0 [ 30.259911] print_report+0xcc/0x620 [ 30.260406] ? __virt_addr_valid+0x102/0x340 [ 30.260964] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.261589] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.262216] kasan_report+0xbe/0xf0 [ 30.262709] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.263337] vma_interval_tree_remove+0xc75/0xec0 [ 30.263941] vma_prepare+0xc54/0x11a0 [ 30.264426] __split_vma+0x5af/0x950 [ 30.264907] ? __pfx___split_vma+0x10/0x10 [ 30.265446] ? find_held_lock+0x2c/0x110 [ 30.265979] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.266551] ? lock_is_held_type+0x9f/0x120 [ 30.267116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.267733] ? mtree_range_walk+0x632/0x900 [ 30.268294] ? mas_walk+0x5c7/0x7c0 [ 30.268774] do_vmi_munmap+0x1f1/0x2b0 [ 30.269279] mmap_region+0x1f9/0x2660 [ 30.269765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.270292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.271028] ? __pfx_lock_acquire+0x10/0x10 [ 30.271572] ? __pfx_mmap_region+0x10/0x10 [ 30.272106] ? security_mmap_addr+0x7d/0xa0 [ 30.272640] ? get_unmapped_area+0x1f5/0x3f0 [ 30.273201] do_mmap+0x854/0xf00 [ 30.273642] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.274138] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.274734] ksys_mmap_pgoff+0x3af/0x500 [ 30.275246] do_syscall_64+0x3f/0x90 [ 30.275734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.276385] RIP: 0033:0x7f0276cbad82 [ 30.276843] 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 [ 30.278963] RSP: 002b:00007ffcd264ed28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.279871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0276cbad82 [ 30.280715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02760f4000 [ 30.281562] RBP: 00007f02760f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.282410] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2fb502ec0 [ 30.283270] R13: 00007ffcd264ed40 R14: 00007ffcd264ed70 R15: 00007ffcd264f0d0 [ 30.284132] [ 30.284427] [ 30.284645] Allocated by task 215: [ 30.285075] kasan_save_stack+0x22/0x50 [ 30.285585] kasan_set_track+0x25/0x30 [ 30.286082] __kasan_slab_alloc+0x59/0x70 [ 30.286609] kmem_cache_alloc+0x16b/0x370 [ 30.287148] vm_area_dup+0x20/0x160 [ 30.287604] __split_vma+0x170/0x950 [ 30.288071] split_vma+0xc6/0x110 [ 30.288513] mprotect_fixup+0x8d2/0xb30 [ 30.289017] do_mprotect_pkey+0x87e/0xd40 [ 30.289543] __x64_sys_mprotect+0x78/0xc0 [ 30.290065] do_syscall_64+0x3f/0x90 [ 30.290544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.291207] [ 30.291424] Freed by task 19: [ 30.291807] kasan_save_stack+0x22/0x50 [ 30.292313] kasan_set_track+0x25/0x30 [ 30.292805] kasan_save_free_info+0x2b/0x50 [ 30.293339] __kasan_slab_free+0x10a/0x190 [ 30.293870] kmem_cache_free+0x10d/0x4d0 [ 30.294383] rcu_core+0x8c8/0x2860 [ 30.294844] __do_softirq+0x1b7/0x7d4 [ 30.295332] [ 30.295551] Last potentially related work creation: [ 30.296142] kasan_save_stack+0x22/0x50 [ 30.296647] __kasan_record_aux_stack+0x8e/0xa0 [ 30.297227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.297874] remove_vma+0x139/0x170 [ 30.298329] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.298899] do_vmi_munmap+0x1f1/0x2b0 [ 30.299389] __vm_munmap+0x138/0x3a0 [ 30.299858] __x64_sys_munmap+0x59/0x80 [ 30.300353] do_syscall_64+0x3f/0x90 [ 30.300831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.301475] [ 30.301693] The buggy address belongs to the object at ffff88801a183e80 [ 30.301693] which belongs to the cache vm_area_struct of size 168 [ 30.303187] The buggy address is located 88 bytes inside of [ 30.303187] freed 168-byte region [ffff88801a183e80, ffff88801a183f28) [ 30.304636] [ 30.304852] The buggy address belongs to the physical page: [ 30.305516] page:000000009e34b57a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a183 [ 30.306630] memcg:ffff88800f0d6f01 [ 30.307069] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.307721] page_type: 0xffffffff() [ 30.308186] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.309121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0d6f01 [ 30.310067] page dumped because: kasan: bad access detected [ 30.310758] [ 30.310976] Memory state around the buggy address: [ 30.311572] ffff88801a183d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.312451] ffff88801a183e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.313315] >ffff88801a183e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.314165] ^ [ 30.314905] ffff88801a183f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.315763] ffff88801a183f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.316621] ================================================================== [ 30.317603] Disabling lock debugging due to kernel taint [ 32.388022] BUG: Bad rss-counter state mm:00000000286e9d0a type:MM_FILEPAGES val:33 [ 32.389015] BUG: Bad rss-counter state mm:00000000286e9d0a type:MM_ANONPAGES val:22 [ 32.853508] BUG: Bad rss-counter state mm:00000000b8a51188 type:MM_FILEPAGES val:33 [ 32.854707] BUG: Bad rss-counter state mm:00000000b8a51188 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12836' (ECDSA) to the list of known hosts. 2023/06/20 14:18:47 fuzzer started 2023/06/20 14:18:48 dialing manager at localhost:36067 2023/06/20 14:18:48 checking machine... 2023/06/20 14:18:48 checking revisions... [ 33.482412] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:18:48 testing simple program... [ 33.529536] cgroup: Unknown subsys name 'net' [ 33.584339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffffffff813fab0f RDI=0000000000000005 RBP=000000079bc2b580 RSP=ffffffff85407d70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c04000 R12=ffff88806ce2c240 R13=000000079bb37340 R14=0000000000000000 R15=00000000fffbeaaf RIP=ffffffff813bce64 RFL=00000093 [--S-A-C] 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 0000000000000000 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=00007f36d6158ca0 CR3=000000000cc84000 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=22016c6f02ac24b56e4f29196bf752cd XMM02=000000000011b7b0ec2efd57dc4c00df XMM03=00000000001222884f0c028ef0a06889 XMM04=a0644447e9d82b6200000000000ae988 XMM05=59d5b690e0af863b00000000001323d0 XMM06=9a2b44003a3923560000000000131238 XMM07=e042d86d42eb936e0000000000122508 XMM08=4f0c028ef0a06889000000000011b810 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8113093e RBX=ffffffff85d92bbc RCX=ffffffff81130a5b RDX=0000000000000000 RSI=ffffffff86097ffc RDI=ffffffff85d92bbc RBP=ffffffff85d92bc0 RSP=ffff88806cf099b8 R8 =ffffffff86097ffc R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000607e R12=ffffffff85d92bbc R13=ffffffff85d92bbc R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f83d558e900 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=00007ffdcaa73000 CR3=000000000f30a000 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=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