syzkaller login: [ 30.792278] BUG: Bad rss-counter state mm:000000005fdbbad0 type:MM_FILEPAGES val:33 [ 30.793054] BUG: Bad rss-counter state mm:000000005fdbbad0 type:MM_ANONPAGES val:22 [ 30.927375] ================================================================== [ 30.928110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.928837] Read of size 8 at addr ffff88800ed90b38 by task sshd/220 [ 30.929439] [ 30.929605] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.930290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.931180] Call Trace: [ 30.931422] [ 30.931646] dump_stack_lvl+0x91/0xf0 [ 30.932035] print_report+0xcc/0x620 [ 30.932408] ? __virt_addr_valid+0x102/0x340 [ 30.932858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.933347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.933838] kasan_report+0xbe/0xf0 [ 30.934227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934713] vma_interval_tree_remove+0xc75/0xec0 [ 30.935172] vma_prepare+0xc54/0x11a0 [ 30.935545] __split_vma+0x5af/0x950 [ 30.935912] ? __pfx___split_vma+0x10/0x10 [ 30.936335] ? find_held_lock+0x2c/0x110 [ 30.936735] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.937185] ? lock_is_held_type+0x9f/0x120 [ 30.937597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.938064] ? mtree_range_walk+0x632/0x900 [ 30.938513] ? mas_walk+0x5c7/0x7c0 [ 30.938872] do_vmi_munmap+0x1f1/0x2b0 [ 30.939250] mmap_region+0x1f9/0x2660 [ 30.939616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.940024] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.940594] ? __pfx_lock_acquire+0x10/0x10 [ 30.941010] ? __pfx_mmap_region+0x10/0x10 [ 30.941452] ? security_mmap_addr+0x7d/0xa0 [ 30.941873] ? get_unmapped_area+0x1f5/0x3f0 [ 30.942296] do_mmap+0x854/0xf00 [ 30.942641] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.943022] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.943469] ksys_mmap_pgoff+0x3af/0x500 [ 30.943870] do_syscall_64+0x3f/0x90 [ 30.944248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.944747] RIP: 0033:0x7f2ef914dd82 [ 30.945104] 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 [ 30.946824] RSP: 002b:00007ffeeeee1b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.947522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ef914dd82 [ 30.948191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ef8587000 [ 30.948841] RBP: 00007f2ef8587000 R08: 0000000000000009 R09: 0000000000001000 [ 30.949497] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7cd7e0980 [ 30.950152] R13: 00007ffeeeee1b80 R14: 00007ffeeeee1bb0 R15: 00007ffeeeee1f10 [ 30.950814] [ 30.951037] [ 30.951199] Allocated by task 213: [ 30.951537] kasan_save_stack+0x22/0x50 [ 30.951937] kasan_set_track+0x25/0x30 [ 30.952318] __kasan_slab_alloc+0x59/0x70 [ 30.952715] kmem_cache_alloc+0x16b/0x370 [ 30.953108] vm_area_dup+0x20/0x160 [ 30.953477] __split_vma+0x170/0x950 [ 30.953848] split_vma+0xc6/0x110 [ 30.954179] mprotect_fixup+0x8d2/0xb30 [ 30.954561] do_mprotect_pkey+0x87e/0xd40 [ 30.954969] __x64_sys_mprotect+0x78/0xc0 [ 30.955372] do_syscall_64+0x3f/0x90 [ 30.955743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.956249] [ 30.956411] Freed by task 203: [ 30.956715] kasan_save_stack+0x22/0x50 [ 30.957105] kasan_set_track+0x25/0x30 [ 30.957482] kasan_save_free_info+0x2b/0x50 [ 30.957888] __kasan_slab_free+0x10a/0x190 [ 30.958311] kmem_cache_free+0x10d/0x4d0 [ 30.958704] rcu_core+0x8c8/0x2860 [ 30.959059] __do_softirq+0x1b7/0x7d4 [ 30.959423] [ 30.959587] Last potentially related work creation: [ 30.960046] kasan_save_stack+0x22/0x50 [ 30.960447] __kasan_record_aux_stack+0x8e/0xa0 [ 30.960887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.961392] remove_vma+0x139/0x170 [ 30.961738] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.962192] do_vmi_munmap+0x1f1/0x2b0 [ 30.962575] __vm_munmap+0x138/0x3a0 [ 30.962960] __x64_sys_munmap+0x59/0x80 [ 30.963341] do_syscall_64+0x3f/0x90 [ 30.963712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.964232] [ 30.964394] Second to last potentially related work creation: [ 30.964930] kasan_save_stack+0x22/0x50 [ 30.965310] __kasan_record_aux_stack+0x8e/0xa0 [ 30.965750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.966242] remove_vma+0x139/0x170 [ 30.966592] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.967018] do_vmi_munmap+0x1f1/0x2b0 [ 30.967406] mmap_region+0x1f9/0x2660 [ 30.967772] do_mmap+0x854/0xf00 [ 30.968117] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.968502] ksys_mmap_pgoff+0x3af/0x500 [ 30.968890] do_syscall_64+0x3f/0x90 [ 30.969267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.969761] [ 30.969931] The buggy address belongs to the object at ffff88800ed90ae0 [ 30.969931] which belongs to the cache vm_area_struct of size 168 [ 30.971058] The buggy address is located 88 bytes inside of [ 30.971058] freed 168-byte region [ffff88800ed90ae0, ffff88800ed90b88) [ 30.972162] [ 30.972329] The buggy address belongs to the physical page: [ 30.972836] page:00000000418ec153 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed90 [ 30.973673] memcg:ffff88800ea13301 [ 30.974008] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.974542] page_type: 0xffffffff() [ 30.974893] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a2c0 dead000000000007 [ 30.975609] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea13301 [ 30.976320] page dumped because: kasan: bad access detected [ 30.976830] [ 30.976996] Memory state around the buggy address: [ 30.977445] ffff88800ed90a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.978109] ffff88800ed90a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.978772] >ffff88800ed90b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.979425] ^ [ 30.979895] ffff88800ed90b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.980566] ffff88800ed90c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.981224] ================================================================== [ 30.981989] Disabling lock debugging due to kernel taint [ 32.648394] BUG: Bad rss-counter state mm:00000000cb23b9c8 type:MM_FILEPAGES val:33 [ 32.649586] BUG: Bad rss-counter state mm:00000000cb23b9c8 type:MM_ANONPAGES val:22 [ 33.040734] BUG: Bad rss-counter state mm:00000000a95a385e type:MM_FILEPAGES val:33 [ 33.041734] BUG: Bad rss-counter state mm:00000000a95a385e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40949' (ECDSA) to the list of known hosts. 2023/06/20 18:13:44 fuzzer started 2023/06/20 18:13:44 dialing manager at localhost:36067 2023/06/20 18:13:44 checking machine... 2023/06/20 18:13:44 checking revisions... [ 33.776354] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:13:44 testing simple program... [ 33.816872] cgroup: Unknown subsys name 'net' [ 33.853709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:13:44 Registers: info registers vcpu 0 RAX=ffff888014766000 RBX=ffff88800e13b198 RCX=1ffff110019ea9b6 RDX=dffffc0000000000 RSI=ffff88801476c780 RDI=ffff88800e13b1c8 RBP=ffff88800cf54d80 RSP=ffff888009dffc88 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801476c000 R13=0000000000000000 R14=ffff88800ff09638 R15=ffff88800ff095f0 RIP=ffffffff81847688 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 00007efec1271900 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=00007efec1826650 CR3=000000000d976000 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=00007efd9094c5f0 CR3=000000001015e000 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=2033343a33313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a33313a3831203032 XMM08=00000000000000000000005600000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000