syzkaller login: [ 30.444245] BUG: Bad rss-counter state mm:00000000220b8851 type:MM_FILEPAGES val:33 [ 30.445160] BUG: Bad rss-counter state mm:00000000220b8851 type:MM_ANONPAGES val:22 [ 30.557175] ================================================================== [ 30.557865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.558580] Read of size 8 at addr ffff888015843d08 by task sshd/219 [ 30.559132] [ 30.559292] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.559916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.560624] Call Trace: [ 30.560855] [ 30.561069] dump_stack_lvl+0x91/0xf0 [ 30.561683] print_report+0xcc/0x620 [ 30.562030] ? __virt_addr_valid+0x102/0x340 [ 30.562421] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.562888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.563324] kasan_report+0xbe/0xf0 [ 30.563665] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.564144] vma_interval_tree_remove+0xc75/0xec0 [ 30.564588] vma_prepare+0xc54/0x11a0 [ 30.564940] __split_vma+0x5af/0x950 [ 30.565289] ? __pfx___split_vma+0x10/0x10 [ 30.565667] ? find_held_lock+0x2c/0x110 [ 30.566032] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.566447] ? lock_is_held_type+0x9f/0x120 [ 30.566872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.567303] ? mtree_range_walk+0x632/0x900 [ 30.567697] ? mas_walk+0x5c7/0x7c0 [ 30.568037] do_vmi_munmap+0x1f1/0x2b0 [ 30.568394] mmap_region+0x1f9/0x2660 [ 30.568737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.569098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.569616] ? __pfx_lock_acquire+0x10/0x10 [ 30.570006] ? __pfx_mmap_region+0x10/0x10 [ 30.570389] ? security_mmap_addr+0x7d/0xa0 [ 30.570844] ? get_unmapped_area+0x1f5/0x3f0 [ 30.571244] do_mmap+0x854/0xf00 [ 30.571564] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.571924] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.572338] ksys_mmap_pgoff+0x3af/0x500 [ 30.572712] do_syscall_64+0x3f/0x90 [ 30.573061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.573538] RIP: 0033:0x7f5d70219d82 [ 30.573862] 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 [ 30.575411] RSP: 002b:00007fff54c0a098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.576051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d70219d82 [ 30.576679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d6f653000 [ 30.577285] RBP: 00007f5d6f653000 R08: 0000000000000009 R09: 0000000000001000 [ 30.577911] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9e49ddec0 [ 30.578546] R13: 00007fff54c0a0b0 R14: 00007fff54c0a0e0 R15: 00007fff54c0a440 [ 30.579171] [ 30.579385] [ 30.579538] Allocated by task 212: [ 30.579851] kasan_save_stack+0x22/0x50 [ 30.580217] kasan_set_track+0x25/0x30 [ 30.580575] __kasan_slab_alloc+0x59/0x70 [ 30.580947] kmem_cache_alloc+0x16b/0x370 [ 30.581318] vm_area_dup+0x20/0x160 [ 30.581645] __split_vma+0x170/0x950 [ 30.581974] split_vma+0xc6/0x110 [ 30.582284] mprotect_fixup+0x8d2/0xb30 [ 30.582680] do_mprotect_pkey+0x87e/0xd40 [ 30.583043] __x64_sys_mprotect+0x78/0xc0 [ 30.583405] do_syscall_64+0x3f/0x90 [ 30.583746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.584207] [ 30.584363] Freed by task 19: [ 30.584645] kasan_save_stack+0x22/0x50 [ 30.585009] kasan_set_track+0x25/0x30 [ 30.585369] kasan_save_free_info+0x2b/0x50 [ 30.585745] __kasan_slab_free+0x10a/0x190 [ 30.586118] kmem_cache_free+0x10d/0x4d0 [ 30.586474] rcu_core+0x8c8/0x2860 [ 30.586821] __do_softirq+0x1b7/0x7d4 [ 30.587155] [ 30.587309] Last potentially related work creation: [ 30.587716] kasan_save_stack+0x22/0x50 [ 30.588071] __kasan_record_aux_stack+0x8e/0xa0 [ 30.588477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.588928] remove_vma+0x139/0x170 [ 30.589258] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.589657] do_vmi_munmap+0x1f1/0x2b0 [ 30.590015] __vm_munmap+0x138/0x3a0 [ 30.590356] __x64_sys_munmap+0x59/0x80 [ 30.590768] do_syscall_64+0x3f/0x90 [ 30.591115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.591578] [ 30.591733] The buggy address belongs to the object at ffff888015843cb0 [ 30.591733] which belongs to the cache vm_area_struct of size 168 [ 30.592781] The buggy address is located 88 bytes inside of [ 30.592781] freed 168-byte region [ffff888015843cb0, ffff888015843d58) [ 30.593772] [ 30.593926] The buggy address belongs to the physical page: [ 30.594397] page:000000005faec153 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15843 [ 30.595214] memcg:ffff888016b9c501 [ 30.595525] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.595998] page_type: 0xffffffff() [ 30.596325] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.596985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b9c501 [ 30.597619] page dumped because: kasan: bad access detected [ 30.598100] [ 30.598259] Memory state around the buggy address: [ 30.598702] ffff888015843c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.599307] ffff888015843c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.599919] >ffff888015843d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.600515] ^ [ 30.600823] ffff888015843d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.601434] ffff888015843e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.602052] ================================================================== [ 30.602905] Disabling lock debugging due to kernel taint [ 32.103173] BUG: Bad rss-counter state mm:00000000df828628 type:MM_FILEPAGES val:33 [ 32.103826] BUG: Bad rss-counter state mm:00000000df828628 type:MM_ANONPAGES val:22 [ 32.475355] BUG: Bad rss-counter state mm:00000000771fba07 type:MM_FILEPAGES val:33 [ 32.476089] BUG: Bad rss-counter state mm:00000000771fba07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17874' (ECDSA) to the list of known hosts. 2023/06/21 08:39:02 fuzzer started 2023/06/21 08:39:02 dialing manager at localhost:36067 2023/06/21 08:39:02 checking machine... 2023/06/21 08:39:02 checking revisions... [ 33.051598] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:39:02 testing simple program... [ 33.100440] cgroup: Unknown subsys name 'net' [ 33.139309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:39:02 Registers: info registers vcpu 0 RAX=1ffff11001ad7cf7 RBX=ffff88800d6be788 RCX=1ffff11001ac2814 RDX=dffffc0000000000 RSI=ffff88800dd70020 RDI=ffff88800d6be7b8 RBP=ffff88800ce16538 RSP=ffff88800e49f6c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800dd70000 R13=0000000000000000 R14=ffff8880163a5178 R15=ffff8880163a5130 RIP=ffffffff8184767e 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 00007f3922d7a700 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=00007ffcbf372ae8 CR3=0000000018e2a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032303a3933 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303537 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=ffffffff810bd0bc RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88806cf099e0 R8 =ffffffff8608a556 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--S-A-C] 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 00007f3aca165900 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=00007f3aca71d0b0 CR3=000000000eb5c000 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=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