syzkaller login: [ 30.962415] BUG: Bad rss-counter state mm:00000000d32be0c0 type:MM_FILEPAGES val:33 [ 30.963635] BUG: Bad rss-counter state mm:00000000d32be0c0 type:MM_ANONPAGES val:22 [ 30.998121] ================================================================== [ 30.999039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.999988] Read of size 8 at addr ffff888016807798 by task sshd/219 [ 31.000797] [ 31.001015] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.002151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.003143] Call Trace: [ 31.003473] [ 31.003780] dump_stack_lvl+0x91/0xf0 [ 31.004294] print_report+0xcc/0x620 [ 31.004795] ? __virt_addr_valid+0x102/0x340 [ 31.005357] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.005988] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006607] kasan_report+0xbe/0xf0 [ 31.007097] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007732] vma_interval_tree_remove+0xc75/0xec0 [ 31.008461] vma_prepare+0xc54/0x11a0 [ 31.008972] __split_vma+0x5af/0x950 [ 31.009482] ? __pfx___split_vma+0x10/0x10 [ 31.010104] ? find_held_lock+0x2c/0x110 [ 31.010747] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.011397] ? lock_is_held_type+0x9f/0x120 [ 31.011948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.012555] ? mtree_range_walk+0x632/0x900 [ 31.013126] ? mas_walk+0x5c7/0x7c0 [ 31.013611] do_vmi_munmap+0x1f1/0x2b0 [ 31.014105] mmap_region+0x1f9/0x2660 [ 31.014589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.015104] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.015822] ? __pfx_lock_acquire+0x10/0x10 [ 31.016367] ? __pfx_mmap_region+0x10/0x10 [ 31.016922] ? security_mmap_addr+0x7d/0xa0 [ 31.017468] ? get_unmapped_area+0x1f5/0x3f0 [ 31.018031] do_mmap+0x854/0xf00 [ 31.018481] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.018989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.019561] ksys_mmap_pgoff+0x3af/0x500 [ 31.020072] do_syscall_64+0x3f/0x90 [ 31.020564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.021247] RIP: 0033:0x7f9c5c2a4d82 [ 31.021707] 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 [ 31.023873] RSP: 002b:00007fffdfacaaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.024787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c5c2a4d82 [ 31.025639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c5b6de000 [ 31.026493] RBP: 00007f9c5b6de000 R08: 0000000000000009 R09: 0000000000001000 [ 31.027350] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ae6092980 [ 31.028200] R13: 00007fffdfacaac0 R14: 00007fffdfacaaf0 R15: 00007fffdfacae50 [ 31.029081] [ 31.029377] [ 31.029596] Allocated by task 212: [ 31.030021] kasan_save_stack+0x22/0x50 [ 31.030531] kasan_set_track+0x25/0x30 [ 31.031033] __kasan_slab_alloc+0x59/0x70 [ 31.031561] kmem_cache_alloc+0x16b/0x370 [ 31.032083] vm_area_dup+0x20/0x160 [ 31.032548] __split_vma+0x170/0x950 [ 31.033028] split_vma+0xc6/0x110 [ 31.033472] mprotect_fixup+0x8d2/0xb30 [ 31.033983] do_mprotect_pkey+0x87e/0xd40 [ 31.034514] __x64_sys_mprotect+0x78/0xc0 [ 31.035047] do_syscall_64+0x3f/0x90 [ 31.035536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036196] [ 31.036413] Freed by task 212: [ 31.036820] kasan_save_stack+0x22/0x50 [ 31.037341] kasan_set_track+0x25/0x30 [ 31.037852] kasan_save_free_info+0x2b/0x50 [ 31.038399] __kasan_slab_free+0x10a/0x190 [ 31.038980] kmem_cache_free+0x10d/0x4d0 [ 31.039582] rcu_core+0x8c8/0x2860 [ 31.040110] __do_softirq+0x1b7/0x7d4 [ 31.040697] [ 31.040964] Last potentially related work creation: [ 31.041681] kasan_save_stack+0x22/0x50 [ 31.042307] __kasan_record_aux_stack+0x8e/0xa0 [ 31.043111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.043904] remove_vma+0x139/0x170 [ 31.044457] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.045170] do_vmi_munmap+0x1f1/0x2b0 [ 31.045777] __vm_munmap+0x138/0x3a0 [ 31.046352] __x64_sys_munmap+0x59/0x80 [ 31.046965] do_syscall_64+0x3f/0x90 [ 31.047545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048353] [ 31.048613] The buggy address belongs to the object at ffff888016807740 [ 31.048613] which belongs to the cache vm_area_struct of size 168 [ 31.050455] The buggy address is located 88 bytes inside of [ 31.050455] freed 168-byte region [ffff888016807740, ffff8880168077e8) [ 31.052218] [ 31.052483] The buggy address belongs to the physical page: [ 31.053319] page:00000000882aec54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16807 [ 31.054683] memcg:ffff888018e2ce01 [ 31.055214] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.056007] page_type: 0xffffffff() [ 31.056572] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.057718] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e2ce01 [ 31.058838] page dumped because: kasan: bad access detected [ 31.059656] [ 31.059917] Memory state around the buggy address: [ 31.060628] ffff888016807680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.061698] ffff888016807700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.062755] >ffff888016807780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.063791] ^ [ 31.064392] ffff888016807800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.065451] ffff888016807880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.066489] ================================================================== [ 31.067738] Disabling lock debugging due to kernel taint [ 33.122861] BUG: Bad rss-counter state mm:0000000091fd867d type:MM_FILEPAGES val:33 [ 33.123839] BUG: Bad rss-counter state mm:0000000091fd867d type:MM_ANONPAGES val:22 [ 33.607236] BUG: Bad rss-counter state mm:0000000071d300a6 type:MM_FILEPAGES val:33 [ 33.608232] BUG: Bad rss-counter state mm:0000000071d300a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55118' (ECDSA) to the list of known hosts. 2023/06/20 16:59:52 fuzzer started 2023/06/20 16:59:52 dialing manager at localhost:36067 2023/06/20 16:59:52 checking machine... 2023/06/20 16:59:52 checking revisions... [ 34.346534] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:59:52 testing simple program... [ 34.400062] cgroup: Unknown subsys name 'net' [ 34.457515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:59:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffff888015eb8000 RDX=1ffff1100d9c1354 RSI=0000000000000001 RDI=ffff88806ce09aa0 RBP=ffff888015eb7e70 RSP=ffff88806ce099f0 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff888015eb7e78 R15=ffff88806ce09a98 RIP=ffffffff811304f3 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 00007f882015e700 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=00007f9d22b76000 CR3=000000000c97e000 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=39353a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363539 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=ffff88800d52b3f8 RBX=dffffc0000000000 RCX=ffffffff812e0135 RDX=1ffff11001aa567f RSI=ffffffff87b89f80 RDI=ffff88800ed58c58 RBP=ffff88800cfcbea8 RSP=ffff888008e37c78 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=ffff88800ed58c48 R13=fffffbfff0f713f0 R14=ffff88800d0943f8 R15=ffffffff87b89f80 RIP=ffffffff844d25c5 RFL=00000046 [---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 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=00007fd4ff4f6618 CR3=0000000015fe8000 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