syzkaller login: [ 30.406883] BUG: Bad rss-counter state mm:00000000f0211489 type:MM_FILEPAGES val:33 [ 30.407928] BUG: Bad rss-counter state mm:00000000f0211489 type:MM_ANONPAGES val:22 [ 30.570647] ================================================================== [ 30.571711] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.572835] Read of size 8 at addr ffff88800e1504e0 by task sshd/218 [ 30.573895] [ 30.574157] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.575173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.576349] Call Trace: [ 30.576697] [ 30.576981] dump_stack_lvl+0x91/0xf0 [ 30.577468] print_report+0xcc/0x620 [ 30.577950] ? __virt_addr_valid+0x102/0x340 [ 30.578492] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.579109] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.579737] kasan_report+0xbe/0xf0 [ 30.580210] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.580871] vma_interval_tree_remove+0xc75/0xec0 [ 30.581501] vma_prepare+0xc54/0x11a0 [ 30.581998] __split_vma+0x5af/0x950 [ 30.582488] ? __pfx___split_vma+0x10/0x10 [ 30.583046] ? find_held_lock+0x2c/0x110 [ 30.583583] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.584173] ? lock_is_held_type+0x9f/0x120 [ 30.584748] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.585374] ? mtree_range_walk+0x632/0x900 [ 30.585949] ? mas_walk+0x5c7/0x7c0 [ 30.586444] do_vmi_munmap+0x1f1/0x2b0 [ 30.586950] mmap_region+0x1f9/0x2660 [ 30.587445] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.587969] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.588718] ? __pfx_lock_acquire+0x10/0x10 [ 30.589272] ? __pfx_mmap_region+0x10/0x10 [ 30.589823] ? security_mmap_addr+0x7d/0xa0 [ 30.590371] ? get_unmapped_area+0x1f5/0x3f0 [ 30.590942] do_mmap+0x854/0xf00 [ 30.591393] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.591915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.592490] ksys_mmap_pgoff+0x3af/0x500 [ 30.593034] do_syscall_64+0x3f/0x90 [ 30.593530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.594208] RIP: 0033:0x7f0f6e6ffd82 [ 30.594676] 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 [ 30.596907] RSP: 002b:00007fffc55aecf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.597850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f6e6ffd82 [ 30.598720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f6db39000 [ 30.599606] RBP: 00007f0f6db39000 R08: 0000000000000009 R09: 0000000000001000 [ 30.600476] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ff0374b20 [ 30.601383] R13: 00007fffc55aed10 R14: 00007fffc55aed40 R15: 00007fffc55af0a0 [ 30.602298] [ 30.602603] [ 30.602824] Allocated by task 211: [ 30.603272] kasan_save_stack+0x22/0x50 [ 30.603805] kasan_set_track+0x25/0x30 [ 30.604323] __kasan_slab_alloc+0x59/0x70 [ 30.604887] kmem_cache_alloc+0x16b/0x370 [ 30.605428] vm_area_dup+0x20/0x160 [ 30.605901] __split_vma+0x170/0x950 [ 30.606383] split_vma+0xc6/0x110 [ 30.606841] mprotect_fixup+0x8d2/0xb30 [ 30.607362] do_mprotect_pkey+0x87e/0xd40 [ 30.607911] __x64_sys_mprotect+0x78/0xc0 [ 30.608472] do_syscall_64+0x3f/0x90 [ 30.608979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.609659] [ 30.609885] Freed by task 211: [ 30.610300] kasan_save_stack+0x22/0x50 [ 30.610825] kasan_set_track+0x25/0x30 [ 30.611338] kasan_save_free_info+0x2b/0x50 [ 30.611909] __kasan_slab_free+0x10a/0x190 [ 30.612468] kmem_cache_free+0x10d/0x4d0 [ 30.613016] rcu_core+0x8c8/0x2860 [ 30.613481] __do_softirq+0x1b7/0x7d4 [ 30.613980] [ 30.614203] Last potentially related work creation: [ 30.614819] kasan_save_stack+0x22/0x50 [ 30.615429] __kasan_record_aux_stack+0x8e/0xa0 [ 30.616023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.616720] remove_vma+0x139/0x170 [ 30.617197] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.617791] do_vmi_munmap+0x1f1/0x2b0 [ 30.618303] __vm_munmap+0x138/0x3a0 [ 30.618794] __x64_sys_munmap+0x59/0x80 [ 30.619320] do_syscall_64+0x3f/0x90 [ 30.619817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.620489] [ 30.620733] The buggy address belongs to the object at ffff88800e150488 [ 30.620733] which belongs to the cache vm_area_struct of size 168 [ 30.622293] The buggy address is located 88 bytes inside of [ 30.622293] freed 168-byte region [ffff88800e150488, ffff88800e150530) [ 30.623789] [ 30.624017] The buggy address belongs to the physical page: [ 30.624723] page:0000000022a6601f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe150 [ 30.625861] memcg:ffff88800e0a4801 [ 30.626312] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.626986] page_type: 0xffffffff() [ 30.627455] raw: 0100000000000200 ffff8880087a0c80 ffffea0000250ac0 dead000000000002 [ 30.628428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a4801 [ 30.629386] page dumped because: kasan: bad access detected [ 30.630097] [ 30.630324] Memory state around the buggy address: [ 30.630946] ffff88800e150380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.631862] ffff88800e150400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.632788] >ffff88800e150480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.633695] ^ [ 30.634490] ffff88800e150500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.635388] ffff88800e150580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.636274] ================================================================== [ 30.637245] Disabling lock debugging due to kernel taint [ 32.907123] BUG: Bad rss-counter state mm:0000000076476e39 type:MM_FILEPAGES val:33 [ 32.908299] BUG: Bad rss-counter state mm:0000000076476e39 type:MM_ANONPAGES val:22 [ 33.351856] BUG: Bad rss-counter state mm:000000005591f78c type:MM_FILEPAGES val:33 [ 33.352768] BUG: Bad rss-counter state mm:000000005591f78c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39500' (ECDSA) to the list of known hosts. 2023/06/21 02:41:51 fuzzer started 2023/06/21 02:41:51 dialing manager at localhost:36067 2023/06/21 02:41:51 checking machine... 2023/06/21 02:41:51 checking revisions... [ 34.130315] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:41:51 testing simple program... [ 34.168235] cgroup: Unknown subsys name 'net' [ 34.220946] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e3 RCX=1ffff110039282a0 RDX=0000000000000010 RSI=ffff888017d0be40 RDI=ffff88801c94159c RBP=0000000000001000 RSP=ffff88801c9f7cb0 R8 =0000000000000001 R9 =ffff88801c94159c R10=ffff88801c941553 R11=00000000000b6a61 R12=ffff888015efe600 R13=0000000000000000 R14=ffff88801c941508 R15=ffff88801c9414c0 RIP=ffffffff844d8b34 RFL=00000282 [--S----] 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 00007f3b9dd04900 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=00007f3b9e2bc0b0 CR3=000000000c954000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffc194f64b8 CR3=000000000e748000 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=2030353a31343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a31343a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000