syzkaller login: [ 31.208387] BUG: Bad rss-counter state mm:00000000c382f4c7 type:MM_FILEPAGES val:33 [ 31.209562] BUG: Bad rss-counter state mm:00000000c382f4c7 type:MM_ANONPAGES val:22 [ 31.248357] ================================================================== [ 31.249344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250369] Read of size 8 at addr ffff88800df12228 by task sshd/219 [ 31.251171] [ 31.251399] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253275] Call Trace: [ 31.253605] [ 31.253893] dump_stack_lvl+0x91/0xf0 [ 31.254425] print_report+0xcc/0x620 [ 31.254921] ? __virt_addr_valid+0x102/0x340 [ 31.255491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256125] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256772] kasan_report+0xbe/0xf0 [ 31.257251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257886] vma_interval_tree_remove+0xc75/0xec0 [ 31.258513] vma_prepare+0xc54/0x11a0 [ 31.259008] __split_vma+0x5af/0x950 [ 31.259492] ? __pfx___split_vma+0x10/0x10 [ 31.260025] ? find_held_lock+0x2c/0x110 [ 31.260551] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.261136] ? lock_is_held_type+0x9f/0x120 [ 31.261685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262310] ? mtree_range_walk+0x632/0x900 [ 31.262878] ? mas_walk+0x5c7/0x7c0 [ 31.263370] do_vmi_munmap+0x1f1/0x2b0 [ 31.263868] mmap_region+0x1f9/0x2660 [ 31.264352] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.264868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.265590] ? __pfx_lock_acquire+0x10/0x10 [ 31.266132] ? __pfx_mmap_region+0x10/0x10 [ 31.266690] ? security_mmap_addr+0x7d/0xa0 [ 31.267236] ? get_unmapped_area+0x1f5/0x3f0 [ 31.267797] do_mmap+0x854/0xf00 [ 31.268247] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.268757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269331] ksys_mmap_pgoff+0x3af/0x500 [ 31.269846] do_syscall_64+0x3f/0x90 [ 31.270344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271005] RIP: 0033:0x7f040cdf2d82 [ 31.271475] 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 [ 31.273639] RSP: 002b:00007ffea78f4ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.274578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f040cdf2d82 [ 31.275429] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f040c22c000 [ 31.276289] RBP: 00007f040c22c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.277152] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651de648ec0 [ 31.278022] R13: 00007ffea78f4ae0 R14: 00007ffea78f4b10 R15: 00007ffea78f4e70 [ 31.278910] [ 31.279204] [ 31.279427] Allocated by task 212: [ 31.279865] kasan_save_stack+0x22/0x50 [ 31.280376] kasan_set_track+0x25/0x30 [ 31.280886] __kasan_slab_alloc+0x59/0x70 [ 31.281417] kmem_cache_alloc+0x16b/0x370 [ 31.281944] vm_area_dup+0x20/0x160 [ 31.282415] __split_vma+0x170/0x950 [ 31.282892] split_vma+0xc6/0x110 [ 31.283337] mprotect_fixup+0x8d2/0xb30 [ 31.283857] do_mprotect_pkey+0x87e/0xd40 [ 31.284387] __x64_sys_mprotect+0x78/0xc0 [ 31.284917] do_syscall_64+0x3f/0x90 [ 31.285405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286062] [ 31.286298] Freed by task 212: [ 31.286692] kasan_save_stack+0x22/0x50 [ 31.287211] kasan_set_track+0x25/0x30 [ 31.287716] kasan_save_free_info+0x2b/0x50 [ 31.288260] __kasan_slab_free+0x10a/0x190 [ 31.288810] kmem_cache_free+0x10d/0x4d0 [ 31.289332] rcu_core+0x8c8/0x2860 [ 31.289791] __do_softirq+0x1b7/0x7d4 [ 31.290288] [ 31.290512] Last potentially related work creation: [ 31.291112] kasan_save_stack+0x22/0x50 [ 31.291627] __kasan_record_aux_stack+0x8e/0xa0 [ 31.292217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.292869] remove_vma+0x139/0x170 [ 31.293330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.293891] do_vmi_munmap+0x1f1/0x2b0 [ 31.294391] __vm_munmap+0x138/0x3a0 [ 31.294869] __x64_sys_munmap+0x59/0x80 [ 31.295374] do_syscall_64+0x3f/0x90 [ 31.295863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296513] [ 31.296736] Second to last potentially related work creation: [ 31.297434] kasan_save_stack+0x22/0x50 [ 31.297947] __kasan_record_aux_stack+0x8e/0xa0 [ 31.298549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.299208] remove_vma+0x139/0x170 [ 31.299666] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.300229] do_vmi_munmap+0x1f1/0x2b0 [ 31.300723] mmap_region+0x1f9/0x2660 [ 31.301210] do_mmap+0x854/0xf00 [ 31.301656] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.302157] ksys_mmap_pgoff+0x3af/0x500 [ 31.302679] do_syscall_64+0x3f/0x90 [ 31.303167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303817] [ 31.304040] The buggy address belongs to the object at ffff88800df121d0 [ 31.304040] which belongs to the cache vm_area_struct of size 168 [ 31.305559] The buggy address is located 88 bytes inside of [ 31.305559] freed 168-byte region [ffff88800df121d0, ffff88800df12278) [ 31.307014] [ 31.307236] The buggy address belongs to the physical page: [ 31.307915] page:0000000063be958a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf12 [ 31.309022] memcg:ffff888009981a01 [ 31.309455] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.310163] page_type: 0xffffffff() [ 31.310628] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354fc0 dead000000000003 [ 31.311580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009981a01 [ 31.312503] page dumped because: kasan: bad access detected [ 31.313184] [ 31.313403] Memory state around the buggy address: [ 31.314000] ffff88800df12100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.314891] ffff88800df12180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.315764] >ffff88800df12200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.316624] ^ [ 31.317197] ffff88800df12280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.318069] ffff88800df12300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.318940] ================================================================== [ 31.320089] Disabling lock debugging due to kernel taint [ 32.940203] BUG: Bad rss-counter state mm:00000000211b147e type:MM_FILEPAGES val:33 [ 32.941425] BUG: Bad rss-counter state mm:00000000211b147e type:MM_ANONPAGES val:22 [ 33.296645] BUG: Bad rss-counter state mm:00000000871609e2 type:MM_FILEPAGES val:33 [ 33.297397] BUG: Bad rss-counter state mm:00000000871609e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21247' (ECDSA) to the list of known hosts. 2023/06/20 15:59:20 fuzzer started 2023/06/20 15:59:20 dialing manager at localhost:36067 2023/06/20 15:59:20 checking machine... 2023/06/20 15:59:20 checking revisions... [ 33.927654] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:59:20 testing simple program... [ 33.977117] cgroup: Unknown subsys name 'net' [ 34.019875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800efe6cd8 RCX=ffffffff86138e01 RDX=1ffff11001dfcda6 RSI=0000000000000000 RDI=ffffffff8180effe RBP=ffff88800efe6d30 RSP=ffff88800efe6cc0 R8 =ffffffff86138e90 R9 =ffff88800efe6d18 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800efe6da0 R13=0000000000000000 R14=ffff88800d5f51c0 R15=ffff88800efe71f8 RIP=ffffffff811303b2 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 00007fcc13551900 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=00007fcc1351b008 CR3=00000000146ce000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 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=00007f83a6bf1e20 CR3=0000000014550000 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=2030323a39353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39353a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000