syzkaller login: [ 38.800787] BUG: Bad rss-counter state mm:00000000de31c2c6 type:MM_FILEPAGES val:33 [ 38.801995] BUG: Bad rss-counter state mm:00000000de31c2c6 type:MM_ANONPAGES val:22 [ 38.978356] ================================================================== [ 38.979424] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.980509] Read of size 8 at addr ffff88800de414e0 by task sshd/221 [ 38.981377] [ 38.981661] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.982652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.983763] Call Trace: [ 38.984126] [ 38.984445] dump_stack_lvl+0x91/0xf0 [ 38.985022] print_report+0xcc/0x620 [ 38.985615] ? __virt_addr_valid+0x102/0x340 [ 38.986234] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.986936] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987646] kasan_report+0xbe/0xf0 [ 38.988187] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988920] vma_interval_tree_remove+0xc75/0xec0 [ 38.989692] vma_prepare+0xc54/0x11a0 [ 38.990249] __split_vma+0x5af/0x950 [ 38.990916] ? __pfx___split_vma+0x10/0x10 [ 38.991628] ? find_held_lock+0x2c/0x110 [ 38.992235] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.992907] ? lock_is_held_type+0x9f/0x120 [ 38.993593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.994307] ? mtree_range_walk+0x632/0x900 [ 38.994967] ? mas_walk+0x5c7/0x7c0 [ 38.995531] do_vmi_munmap+0x1f1/0x2b0 [ 38.996100] mmap_region+0x1f9/0x2660 [ 38.996685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.997277] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.998152] ? __pfx_lock_acquire+0x10/0x10 [ 38.998799] ? __pfx_mmap_region+0x10/0x10 [ 38.999410] ? security_mmap_addr+0x7d/0xa0 [ 39.000036] ? get_unmapped_area+0x1f5/0x3f0 [ 39.000691] do_mmap+0x854/0xf00 [ 39.001202] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.001827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.002485] ksys_mmap_pgoff+0x3af/0x500 [ 39.003089] do_syscall_64+0x3f/0x90 [ 39.003657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.004401] RIP: 0033:0x7fd49baedd82 [ 39.004948] 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 [ 39.007498] RSP: 002b:00007ffeff852aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.008528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd49baedd82 [ 39.009482] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd49af27000 [ 39.010441] RBP: 00007fd49af27000 R08: 0000000000000009 R09: 0000000000001000 [ 39.011393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5527b7ec0 [ 39.012349] R13: 00007ffeff852ac0 R14: 00007ffeff852af0 R15: 00007ffeff852e50 [ 39.013303] [ 39.013675] [ 39.013917] Allocated by task 214: [ 39.014390] kasan_save_stack+0x22/0x50 [ 39.014970] kasan_set_track+0x25/0x30 [ 39.015535] __kasan_slab_alloc+0x59/0x70 [ 39.016119] kmem_cache_alloc+0x16b/0x370 [ 39.016710] vm_area_dup+0x20/0x160 [ 39.017215] __split_vma+0x170/0x950 [ 39.017778] split_vma+0xc6/0x110 [ 39.018272] mprotect_fixup+0x8d2/0xb30 [ 39.018845] do_mprotect_pkey+0x87e/0xd40 [ 39.019503] __x64_sys_mprotect+0x78/0xc0 [ 39.020088] do_syscall_64+0x3f/0x90 [ 39.020628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021341] [ 39.021624] Freed by task 13: [ 39.022046] kasan_save_stack+0x22/0x50 [ 39.022629] kasan_set_track+0x25/0x30 [ 39.023177] kasan_save_free_info+0x2b/0x50 [ 39.023782] __kasan_slab_free+0x10a/0x190 [ 39.024376] kmem_cache_free+0x10d/0x4d0 [ 39.024957] rcu_core+0x8c8/0x2860 [ 39.025475] __do_softirq+0x1b7/0x7d4 [ 39.026035] [ 39.026280] Last potentially related work creation: [ 39.026947] kasan_save_stack+0x22/0x50 [ 39.027519] __kasan_record_aux_stack+0x8e/0xa0 [ 39.028148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.028890] remove_vma+0x139/0x170 [ 39.029401] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.030039] do_vmi_munmap+0x1f1/0x2b0 [ 39.030593] __vm_munmap+0x138/0x3a0 [ 39.031108] __x64_sys_munmap+0x59/0x80 [ 39.031665] do_syscall_64+0x3f/0x90 [ 39.032189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.032906] [ 39.033140] Second to last potentially related work creation: [ 39.033938] kasan_save_stack+0x22/0x50 [ 39.034508] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035962] remove_vma+0x139/0x170 [ 39.036462] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.037119] do_vmi_munmap+0x1f1/0x2b0 [ 39.037720] mmap_region+0x1f9/0x2660 [ 39.038247] do_mmap+0x854/0xf00 [ 39.038735] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.039272] ksys_mmap_pgoff+0x3af/0x500 [ 39.039834] do_syscall_64+0x3f/0x90 [ 39.040356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.041078] [ 39.041317] The buggy address belongs to the object at ffff88800de41488 [ 39.041317] which belongs to the cache vm_area_struct of size 168 [ 39.042999] The buggy address is located 88 bytes inside of [ 39.042999] freed 168-byte region [ffff88800de41488, ffff88800de41530) [ 39.044570] [ 39.044809] The buggy address belongs to the physical page: [ 39.045591] page:0000000052d23438 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde41 [ 39.046805] memcg:ffff88800ca6c401 [ 39.047274] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.048000] page_type: 0xffffffff() [ 39.048505] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c400 dead000000000002 [ 39.049555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca6c401 [ 39.050554] page dumped because: kasan: bad access detected [ 39.051272] [ 39.051517] Memory state around the buggy address: [ 39.052152] ffff88800de41380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.053097] ffff88800de41400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.054068] >ffff88800de41480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.055017] ^ [ 39.055842] ffff88800de41500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.056783] ffff88800de41580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.057740] ================================================================== [ 39.058831] Disabling lock debugging due to kernel taint [ 40.992138] BUG: Bad rss-counter state mm:00000000ac34eda1 type:MM_FILEPAGES val:33 [ 40.993171] BUG: Bad rss-counter state mm:00000000ac34eda1 type:MM_ANONPAGES val:22 [ 41.488964] BUG: Bad rss-counter state mm:00000000508e63e1 type:MM_FILEPAGES val:33 [ 41.490087] BUG: Bad rss-counter state mm:00000000508e63e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22600' (ECDSA) to the list of known hosts. 2023/06/20 18:19:47 fuzzer started 2023/06/20 18:19:47 dialing manager at localhost:36067 2023/06/20 18:19:47 checking machine... 2023/06/20 18:19:47 checking revisions... [ 42.143853] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:19:47 testing simple program... [ 42.194707] cgroup: Unknown subsys name 'net' [ 42.251525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fa40 RCX=0000000000000001 RDX=1ffff110011b3f5b RSI=ffffffff813782f8 RDI=ffff888008d9fa4c RBP=ffff888008d9fad8 RSP=ffff888008d9f958 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800c986c60 RIP=ffffffff813ad547 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 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=00007fd2107630b0 CR3=0000000008ed0000 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=39313a3831203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3bde RDX=1ffff11001dade6e RSI=1ffff11001dade6d RDI=1ffff11001dade6d RBP=ffff88800ed6f368 RSP=ffff88800ed6f2a0 R8 =ffffffff863b3be2 R9 =ffff88800ed6f350 R10=0000000000038001 R11=000000000008aa79 R12=ffff88800ed6f370 R13=ffff88800ed6f358 R14=ffff88800ed6ff08 R15=ffff88800ed6f310 RIP=ffffffff811310ce 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 00007fd2101ab900 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=00007fd210762618 CR3=000000001c9da000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000