syzkaller login: [ 30.748101] BUG: Bad rss-counter state mm:0000000056765ea6 type:MM_FILEPAGES val:33 [ 30.749360] BUG: Bad rss-counter state mm:0000000056765ea6 type:MM_ANONPAGES val:22 [ 30.930009] ================================================================== [ 30.930925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.931890] Read of size 8 at addr ffff88800e6be3f8 by task sshd/220 [ 30.932660] [ 30.932883] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.933827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.934809] Call Trace: [ 30.935134] [ 30.935428] dump_stack_lvl+0x91/0xf0 [ 30.935926] print_report+0xcc/0x620 [ 30.936409] ? __virt_addr_valid+0x102/0x340 [ 30.936971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937588] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.938207] kasan_report+0xbe/0xf0 [ 30.938683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.939321] vma_interval_tree_remove+0xc75/0xec0 [ 30.939927] vma_prepare+0xc54/0x11a0 [ 30.940412] __split_vma+0x5af/0x950 [ 30.940891] ? __pfx___split_vma+0x10/0x10 [ 30.941423] ? find_held_lock+0x2c/0x110 [ 30.941948] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.942517] ? lock_is_held_type+0x9f/0x120 [ 30.943078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.943703] ? mtree_range_walk+0x632/0x900 [ 30.944258] ? mas_walk+0x5c7/0x7c0 [ 30.944743] do_vmi_munmap+0x1f1/0x2b0 [ 30.945242] mmap_region+0x1f9/0x2660 [ 30.945735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.946264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.946983] ? __pfx_lock_acquire+0x10/0x10 [ 30.947543] ? __pfx_mmap_region+0x10/0x10 [ 30.948082] ? security_mmap_addr+0x7d/0xa0 [ 30.948613] ? get_unmapped_area+0x1f5/0x3f0 [ 30.949165] do_mmap+0x854/0xf00 [ 30.949607] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.950110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.950676] ksys_mmap_pgoff+0x3af/0x500 [ 30.951188] do_syscall_64+0x3f/0x90 [ 30.951691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952347] RIP: 0033:0x7f58148f4d82 [ 30.952809] 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 [ 30.954921] RSP: 002b:00007ffe8feea6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.955833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58148f4d82 [ 30.956685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5813d2e000 [ 30.957535] RBP: 00007f5813d2e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.958390] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560cffcbec0 [ 30.959241] R13: 00007ffe8feea700 R14: 00007ffe8feea730 R15: 00007ffe8feeaa90 [ 30.960129] [ 30.960423] [ 30.960642] Allocated by task 213: [ 30.961085] kasan_save_stack+0x22/0x50 [ 30.961593] kasan_set_track+0x25/0x30 [ 30.962093] __kasan_slab_alloc+0x59/0x70 [ 30.962620] kmem_cache_alloc+0x16b/0x370 [ 30.963147] vm_area_dup+0x20/0x160 [ 30.963612] __split_vma+0x170/0x950 [ 30.964082] split_vma+0xc6/0x110 [ 30.964525] mprotect_fixup+0x8d2/0xb30 [ 30.965034] do_mprotect_pkey+0x87e/0xd40 [ 30.965555] __x64_sys_mprotect+0x78/0xc0 [ 30.966084] do_syscall_64+0x3f/0x90 [ 30.966565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967222] [ 30.967449] Freed by task 203: [ 30.967854] kasan_save_stack+0x22/0x50 [ 30.968365] kasan_set_track+0x25/0x30 [ 30.968863] kasan_save_free_info+0x2b/0x50 [ 30.969406] __kasan_slab_free+0x10a/0x190 [ 30.969940] kmem_cache_free+0x10d/0x4d0 [ 30.970450] rcu_core+0x8c8/0x2860 [ 30.970900] __do_softirq+0x1b7/0x7d4 [ 30.971413] [ 30.971632] Last potentially related work creation: [ 30.972229] kasan_save_stack+0x22/0x50 [ 30.972743] __kasan_record_aux_stack+0x8e/0xa0 [ 30.973327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.973972] remove_vma+0x139/0x170 [ 30.974427] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974991] do_vmi_munmap+0x1f1/0x2b0 [ 30.975492] __vm_munmap+0x138/0x3a0 [ 30.975958] __x64_sys_munmap+0x59/0x80 [ 30.976455] do_syscall_64+0x3f/0x90 [ 30.976935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977578] [ 30.977797] Second to last potentially related work creation: [ 30.978481] kasan_save_stack+0x22/0x50 [ 30.978982] __kasan_record_aux_stack+0x8e/0xa0 [ 30.979575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.980231] remove_vma+0x139/0x170 [ 30.980687] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.981253] do_vmi_munmap+0x1f1/0x2b0 [ 30.981741] mmap_region+0x1f9/0x2660 [ 30.982221] do_mmap+0x854/0xf00 [ 30.982653] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.983146] ksys_mmap_pgoff+0x3af/0x500 [ 30.983670] do_syscall_64+0x3f/0x90 [ 30.984181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.984863] [ 30.985085] The buggy address belongs to the object at ffff88800e6be3a0 [ 30.985085] which belongs to the cache vm_area_struct of size 168 [ 30.986581] The buggy address is located 88 bytes inside of [ 30.986581] freed 168-byte region [ffff88800e6be3a0, ffff88800e6be448) [ 30.988001] [ 30.988220] The buggy address belongs to the physical page: [ 30.988888] page:00000000d11234ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6be [ 30.989973] memcg:ffff88800df4f801 [ 30.990404] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.991049] page_type: 0xffffffff() [ 30.991526] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.992453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df4f801 [ 30.993366] page dumped because: kasan: bad access detected [ 30.994024] [ 30.994242] Memory state around the buggy address: [ 30.994819] ffff88800e6be280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.995689] ffff88800e6be300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.996547] >ffff88800e6be380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.997403] ^ [ 30.998248] ffff88800e6be400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.999112] ffff88800e6be480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.999985] ================================================================== [ 31.001010] Disabling lock debugging due to kernel taint [ 32.882769] BUG: Bad rss-counter state mm:000000005f3668a1 type:MM_FILEPAGES val:33 [ 32.884074] BUG: Bad rss-counter state mm:000000005f3668a1 type:MM_ANONPAGES val:22 [ 33.352356] BUG: Bad rss-counter state mm:000000004456dc30 type:MM_FILEPAGES val:33 [ 33.353363] BUG: Bad rss-counter state mm:000000004456dc30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17582' (ECDSA) to the list of known hosts. 2023/06/20 18:03:59 fuzzer started 2023/06/20 18:03:59 dialing manager at localhost:36067 2023/06/20 18:03:59 checking machine... 2023/06/20 18:03:59 checking revisions... [ 34.074807] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:03:59 testing simple program... [ 34.118616] cgroup: Unknown subsys name 'net' [ 34.161886] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:03:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138e01 RDX=1ffff1100d9c1353 RSI=ffffffff8180c705 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016561b40 R15=ffff88806ce09a98 RIP=ffffffff8113060b 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 00007f81f9a78900 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=00007ffdd032e000 CR3=000000000b8f8000 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=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 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=00007f907ee89230 CR3=000000000c984000 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=2039353a33303a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000