syzkaller login: [ 28.839405] BUG: Bad rss-counter state mm:0000000048e6ee7a type:MM_FILEPAGES val:33 [ 28.840812] BUG: Bad rss-counter state mm:0000000048e6ee7a type:MM_ANONPAGES val:22 [ 28.981116] ================================================================== [ 28.982048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.982984] Read of size 8 at addr ffff88800de14b38 by task sshd/219 [ 28.983767] [ 28.983992] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.984981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.985999] Call Trace: [ 28.986314] [ 28.986607] dump_stack_lvl+0x91/0xf0 [ 28.987103] print_report+0xcc/0x620 [ 28.987602] ? __virt_addr_valid+0x102/0x340 [ 28.988166] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.988797] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.989428] kasan_report+0xbe/0xf0 [ 28.989906] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.990528] vma_interval_tree_remove+0xc75/0xec0 [ 28.991123] vma_prepare+0xc54/0x11a0 [ 28.991598] __split_vma+0x5af/0x950 [ 28.992071] ? __pfx___split_vma+0x10/0x10 [ 28.992591] ? find_held_lock+0x2c/0x110 [ 28.993116] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.993693] ? lock_is_held_type+0x9f/0x120 [ 28.994238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.994839] ? mtree_range_walk+0x632/0x900 [ 28.995403] ? mas_walk+0x5c7/0x7c0 [ 28.995877] do_vmi_munmap+0x1f1/0x2b0 [ 28.996370] mmap_region+0x1f9/0x2660 [ 28.996853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.997386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.998100] ? __pfx_lock_acquire+0x10/0x10 [ 28.998632] ? __pfx_mmap_region+0x10/0x10 [ 28.999166] ? security_mmap_addr+0x7d/0xa0 [ 28.999701] ? get_unmapped_area+0x1f5/0x3f0 [ 29.000245] do_mmap+0x854/0xf00 [ 29.000679] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.001179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.001750] ksys_mmap_pgoff+0x3af/0x500 [ 29.002254] do_syscall_64+0x3f/0x90 [ 29.002729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.003367] RIP: 0033:0x7f2e92e7ed82 [ 29.003824] 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 [ 29.005953] RSP: 002b:00007ffcfcfb1a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.006855] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e92e7ed82 [ 29.007707] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e922b8000 [ 29.008545] RBP: 00007f2e922b8000 R08: 0000000000000009 R09: 0000000000001000 [ 29.009403] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564cb96d4ec0 [ 29.010243] R13: 00007ffcfcfb1a80 R14: 00007ffcfcfb1ab0 R15: 00007ffcfcfb1e10 [ 29.011100] [ 29.011392] [ 29.011609] Allocated by task 212: [ 29.012045] kasan_save_stack+0x22/0x50 [ 29.012557] kasan_set_track+0x25/0x30 [ 29.013055] __kasan_slab_alloc+0x59/0x70 [ 29.013588] kmem_cache_alloc+0x16b/0x370 [ 29.014121] vm_area_dup+0x20/0x160 [ 29.014577] __split_vma+0x170/0x950 [ 29.015048] split_vma+0xc6/0x110 [ 29.015489] mprotect_fixup+0x8d2/0xb30 [ 29.015996] do_mprotect_pkey+0x87e/0xd40 [ 29.016521] __x64_sys_mprotect+0x78/0xc0 [ 29.017040] do_syscall_64+0x3f/0x90 [ 29.017538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.018191] [ 29.018412] Freed by task 19: [ 29.018792] kasan_save_stack+0x22/0x50 [ 29.019301] kasan_set_track+0x25/0x30 [ 29.019805] kasan_save_free_info+0x2b/0x50 [ 29.020348] __kasan_slab_free+0x10a/0x190 [ 29.020884] kmem_cache_free+0x10d/0x4d0 [ 29.021400] rcu_core+0x8c8/0x2860 [ 29.021850] __do_softirq+0x1b7/0x7d4 [ 29.022337] [ 29.022554] Last potentially related work creation: [ 29.023150] kasan_save_stack+0x22/0x50 [ 29.023652] __kasan_record_aux_stack+0x8e/0xa0 [ 29.024228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.024866] remove_vma+0x139/0x170 [ 29.025330] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.025892] do_vmi_munmap+0x1f1/0x2b0 [ 29.026385] __vm_munmap+0x138/0x3a0 [ 29.026854] __x64_sys_munmap+0x59/0x80 [ 29.027346] do_syscall_64+0x3f/0x90 [ 29.027815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.028465] [ 29.028679] Second to last potentially related work creation: [ 29.029388] kasan_save_stack+0x22/0x50 [ 29.029887] __kasan_record_aux_stack+0x8e/0xa0 [ 29.030461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.031117] remove_vma+0x139/0x170 [ 29.031564] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.032116] do_vmi_munmap+0x1f1/0x2b0 [ 29.032605] mmap_region+0x1f9/0x2660 [ 29.033082] do_mmap+0x854/0xf00 [ 29.033521] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.034017] ksys_mmap_pgoff+0x3af/0x500 [ 29.034518] do_syscall_64+0x3f/0x90 [ 29.034986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.035638] [ 29.035852] The buggy address belongs to the object at ffff88800de14ae0 [ 29.035852] which belongs to the cache vm_area_struct of size 168 [ 29.037346] The buggy address is located 88 bytes inside of [ 29.037346] freed 168-byte region [ffff88800de14ae0, ffff88800de14b88) [ 29.038751] [ 29.038969] The buggy address belongs to the physical page: [ 29.039624] page:0000000064926632 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde14 [ 29.040708] memcg:ffff88800cb02a01 [ 29.041137] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.041800] page_type: 0xffffffff() [ 29.042248] raw: 0100000000000200 ffff88800879fc80 ffffea000039e640 dead000000000008 [ 29.043155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb02a01 [ 29.044058] page dumped because: kasan: bad access detected [ 29.044710] [ 29.044928] Memory state around the buggy address: [ 29.045513] ffff88800de14a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.046384] ffff88800de14a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.047245] >ffff88800de14b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.048105] ^ [ 29.048720] ffff88800de14b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.049595] ffff88800de14c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.050451] ================================================================== [ 29.051745] Disabling lock debugging due to kernel taint [ 31.298229] BUG: Bad rss-counter state mm:000000009158db83 type:MM_FILEPAGES val:33 [ 31.299218] BUG: Bad rss-counter state mm:000000009158db83 type:MM_ANONPAGES val:22 [ 31.792565] BUG: Bad rss-counter state mm:000000004cc52d89 type:MM_FILEPAGES val:33 [ 31.794175] BUG: Bad rss-counter state mm:000000004cc52d89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14528' (ECDSA) to the list of known hosts. 2023/06/20 03:39:54 fuzzer started 2023/06/20 03:39:54 dialing manager at localhost:44161 2023/06/20 03:39:55 checking machine... 2023/06/20 03:39:55 checking revisions... [ 32.522253] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:39:55 testing simple program... [ 32.565654] cgroup: Unknown subsys name 'net' [ 32.604439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:39:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffde7d2a588 CR3=0000000019d20000 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=2034353a39333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a39333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880147579a0 RCX=ffffffff86137501 RDX=0000000000000000 RSI=ffffffff8180cd09 RDI=ffff8880147579ac RBP=0000000000000002 RSP=ffff8880147578b8 R8 =ffffffff86137542 R9 =ffff888014757918 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880147579a0 R13=0000000000000000 R14=ffff88800b818000 R15=0000000000000dc0 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007fa0e1270900 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=00007ffebc28cfe8 CR3=000000000e794000 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