syzkaller login: [ 32.765182] BUG: Bad rss-counter state mm:00000000ef0881f0 type:MM_FILEPAGES val:33 [ 32.766366] BUG: Bad rss-counter state mm:00000000ef0881f0 type:MM_ANONPAGES val:22 [ 32.913431] ================================================================== [ 32.914337] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.915276] Read of size 8 at addr ffff88801832c6b0 by task sshd/218 [ 32.916043] [ 32.916263] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.917209] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.918172] Call Trace: [ 32.918490] [ 32.918809] dump_stack_lvl+0x91/0xf0 [ 32.919296] print_report+0xcc/0x620 [ 32.919776] ? __virt_addr_valid+0x102/0x340 [ 32.920327] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.920946] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.921554] kasan_report+0xbe/0xf0 [ 32.922023] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.922642] vma_interval_tree_remove+0xc75/0xec0 [ 32.923260] vma_prepare+0xc54/0x11a0 [ 32.923736] __split_vma+0x5af/0x950 [ 32.924216] ? __pfx___split_vma+0x10/0x10 [ 32.924749] ? find_held_lock+0x2c/0x110 [ 32.925266] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.925830] ? lock_is_held_type+0x9f/0x120 [ 32.926363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.927005] ? mtree_range_walk+0x632/0x900 [ 32.927552] ? mas_walk+0x5c7/0x7c0 [ 32.928026] do_vmi_munmap+0x1f1/0x2b0 [ 32.928523] mmap_region+0x1f9/0x2660 [ 32.929011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.929523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.930239] ? __pfx_lock_acquire+0x10/0x10 [ 32.930780] ? __pfx_mmap_region+0x10/0x10 [ 32.931309] ? security_mmap_addr+0x7d/0xa0 [ 32.931838] ? get_unmapped_area+0x1f5/0x3f0 [ 32.932386] do_mmap+0x854/0xf00 [ 32.932827] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.933317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.933872] ksys_mmap_pgoff+0x3af/0x500 [ 32.934381] do_syscall_64+0x3f/0x90 [ 32.934869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.935509] RIP: 0033:0x7f82e2255d82 [ 32.935962] 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 [ 32.938090] RSP: 002b:00007fff007122e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.939014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82e2255d82 [ 32.939868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82e168f000 [ 32.940710] RBP: 00007f82e168f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.941558] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d850c6b20 [ 32.942407] R13: 00007fff00712300 R14: 00007fff00712330 R15: 00007fff00712690 [ 32.943282] [ 32.943580] [ 32.943801] Allocated by task 211: [ 32.944223] kasan_save_stack+0x22/0x50 [ 32.944730] kasan_set_track+0x25/0x30 [ 32.945218] __kasan_slab_alloc+0x59/0x70 [ 32.945740] kmem_cache_alloc+0x16b/0x370 [ 32.946258] vm_area_dup+0x20/0x160 [ 32.946711] __split_vma+0x170/0x950 [ 32.947188] split_vma+0xc6/0x110 [ 32.947640] mprotect_fixup+0x8d2/0xb30 [ 32.948142] do_mprotect_pkey+0x87e/0xd40 [ 32.948658] __x64_sys_mprotect+0x78/0xc0 [ 32.949179] do_syscall_64+0x3f/0x90 [ 32.949647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.950282] [ 32.950495] Freed by task 211: [ 32.950897] kasan_save_stack+0x22/0x50 [ 32.951394] kasan_set_track+0x25/0x30 [ 32.951881] kasan_save_free_info+0x2b/0x50 [ 32.952407] __kasan_slab_free+0x10a/0x190 [ 32.952937] kmem_cache_free+0x10d/0x4d0 [ 32.953443] rcu_core+0x8c8/0x2860 [ 32.953890] __do_softirq+0x1b7/0x7d4 [ 32.954372] [ 32.954587] Last potentially related work creation: [ 32.955183] kasan_save_stack+0x22/0x50 [ 32.955686] __kasan_record_aux_stack+0x8e/0xa0 [ 32.956258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.956911] remove_vma+0x139/0x170 [ 32.957359] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.957913] do_vmi_munmap+0x1f1/0x2b0 [ 32.958396] __vm_munmap+0x138/0x3a0 [ 32.958876] __x64_sys_munmap+0x59/0x80 [ 32.959371] do_syscall_64+0x3f/0x90 [ 32.959842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.960491] [ 32.960707] The buggy address belongs to the object at ffff88801832c658 [ 32.960707] which belongs to the cache vm_area_struct of size 168 [ 32.962175] The buggy address is located 88 bytes inside of [ 32.962175] freed 168-byte region [ffff88801832c658, ffff88801832c700) [ 32.963584] [ 32.963807] The buggy address belongs to the physical page: [ 32.964481] page:00000000c7814fad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1832c [ 32.965574] memcg:ffff88800f1f6301 [ 32.966005] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.966647] page_type: 0xffffffff() [ 32.967112] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.968030] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1f6301 [ 32.968935] page dumped because: kasan: bad access detected [ 32.969592] [ 32.969810] Memory state around the buggy address: [ 32.970393] ffff88801832c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.971260] ffff88801832c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.972125] >ffff88801832c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.972987] ^ [ 32.973581] ffff88801832c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.974435] ffff88801832c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.975303] ================================================================== [ 32.976388] Disabling lock debugging due to kernel taint [ 35.054067] BUG: Bad rss-counter state mm:00000000351b6cbe type:MM_FILEPAGES val:33 [ 35.055218] BUG: Bad rss-counter state mm:00000000351b6cbe type:MM_ANONPAGES val:22 [ 35.560578] BUG: Bad rss-counter state mm:000000003da518f6 type:MM_FILEPAGES val:33 [ 35.561840] BUG: Bad rss-counter state mm:000000003da518f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3453' (ECDSA) to the list of known hosts. 2023/06/19 18:22:45 fuzzer started 2023/06/19 18:22:45 dialing manager at localhost:44161 2023/06/19 18:22:45 checking machine... 2023/06/19 18:22:45 checking revisions... [ 36.211452] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:22:45 testing simple program... [ 36.255630] cgroup: Unknown subsys name 'net' [ 36.292564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:22:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000002d00 RCX=ffffffff818d8c88 RDX=ffff8880147db680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce36278 RSP=ffff88801684fdd0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000002d81 R13=0000000000000000 R14=1ffff11002d09fd1 R15=0000000000000000 RIP=ffffffff814c01fc 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 00007f6a760bb900 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=00007f6a76670650 CR3=000000000f04c000 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=0000000000000000 RBX=ffffed1001c52f12 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff81b3dc61 RDI=0000000000000005 RBP=ffff888018e13e20 RSP=ffff88800e297860 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801ba850b0 R13=ffff88800e2978d0 R14=0000000000000000 R15=0000000000000020 RIP=ffffffff81b3dc85 RFL=00000286 [--S--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 00007f3c1fe2a700 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=00007ffe195373b8 CR3=0000000019a50000 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=2034343a32323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a32323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000