syzkaller login: [ 32.748616] BUG: Bad rss-counter state mm:000000007c22849e type:MM_FILEPAGES val:33 [ 32.750194] BUG: Bad rss-counter state mm:000000007c22849e type:MM_ANONPAGES val:22 [ 32.912653] ================================================================== [ 32.913559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.914433] Read of size 8 at addr ffff888009f07a50 by task sshd/220 [ 32.915255] [ 32.915478] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.916287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.917228] Call Trace: [ 32.917549] [ 32.917819] dump_stack_lvl+0x91/0xf0 [ 32.918282] print_report+0xcc/0x620 [ 32.918738] ? __virt_addr_valid+0x102/0x340 [ 32.919265] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.919853] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.920430] kasan_report+0xbe/0xf0 [ 32.920879] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.921470] vma_interval_tree_remove+0xc75/0xec0 [ 32.922040] vma_prepare+0xc54/0x11a0 [ 32.922495] __split_vma+0x5af/0x950 [ 32.922938] ? __pfx___split_vma+0x10/0x10 [ 32.923439] ? find_held_lock+0x2c/0x110 [ 32.923935] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.924472] ? lock_is_held_type+0x9f/0x120 [ 32.925001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.925608] ? mtree_range_walk+0x632/0x900 [ 32.926153] ? mas_walk+0x5c7/0x7c0 [ 32.926617] do_vmi_munmap+0x1f1/0x2b0 [ 32.927097] mmap_region+0x1f9/0x2660 [ 32.927578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.928080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.928786] ? __pfx_lock_acquire+0x10/0x10 [ 32.929335] ? __pfx_mmap_region+0x10/0x10 [ 32.929865] ? security_mmap_addr+0x7d/0xa0 [ 32.930384] ? get_unmapped_area+0x1f5/0x3f0 [ 32.930935] do_mmap+0x854/0xf00 [ 32.931374] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.931866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.932425] ksys_mmap_pgoff+0x3af/0x500 [ 32.932929] do_syscall_64+0x3f/0x90 [ 32.933419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.934055] RIP: 0033:0x7fbb6df8cd82 [ 32.934503] 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 [ 32.936598] RSP: 002b:00007ffd3fc0b108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.937521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb6df8cd82 [ 32.938363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb6d3c6000 [ 32.939205] RBP: 00007fbb6d3c6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.940037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc1b5c4d90 [ 32.940865] R13: 00007ffd3fc0b120 R14: 00007ffd3fc0b150 R15: 00007ffd3fc0b4b0 [ 32.941749] [ 32.942036] [ 32.942250] Allocated by task 213: [ 32.942733] kasan_save_stack+0x22/0x50 [ 32.943225] kasan_set_track+0x25/0x30 [ 32.943728] __kasan_slab_alloc+0x59/0x70 [ 32.944246] kmem_cache_alloc+0x16b/0x370 [ 32.944801] vm_area_dup+0x20/0x160 [ 32.945368] __split_vma+0x170/0x950 [ 32.945940] split_vma+0xc6/0x110 [ 32.946486] mprotect_fixup+0x8d2/0xb30 [ 32.947093] do_mprotect_pkey+0x87e/0xd40 [ 32.947727] __x64_sys_mprotect+0x78/0xc0 [ 32.948357] do_syscall_64+0x3f/0x90 [ 32.948928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.949736] [ 32.949996] Freed by task 213: [ 32.950476] kasan_save_stack+0x22/0x50 [ 32.951087] kasan_set_track+0x25/0x30 [ 32.951695] kasan_save_free_info+0x2b/0x50 [ 32.952338] __kasan_slab_free+0x10a/0x190 [ 32.952983] kmem_cache_free+0x10d/0x4d0 [ 32.953620] rcu_core+0x8c8/0x2860 [ 32.954161] __do_softirq+0x1b7/0x7d4 [ 32.954753] [ 32.955008] Last potentially related work creation: [ 32.955717] kasan_save_stack+0x22/0x50 [ 32.956320] __kasan_record_aux_stack+0x8e/0xa0 [ 32.957032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.957807] remove_vma+0x139/0x170 [ 32.958347] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.959016] do_vmi_munmap+0x1f1/0x2b0 [ 32.959605] __vm_munmap+0x138/0x3a0 [ 32.960178] __x64_sys_munmap+0x59/0x80 [ 32.960777] do_syscall_64+0x3f/0x90 [ 32.961366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.962141] [ 32.962406] The buggy address belongs to the object at ffff888009f079f8 [ 32.962406] which belongs to the cache vm_area_struct of size 168 [ 32.964209] The buggy address is located 88 bytes inside of [ 32.964209] freed 168-byte region [ffff888009f079f8, ffff888009f07aa0) [ 32.965950] [ 32.966213] The buggy address belongs to the physical page: [ 32.967017] page:000000000800324d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f07 [ 32.968347] memcg:ffff8880169e7601 [ 32.968858] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.969554] page_type: 0xffffffff() [ 32.970013] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.970922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169e7601 [ 32.971834] page dumped because: kasan: bad access detected [ 32.972490] [ 32.972707] Memory state around the buggy address: [ 32.973294] ffff888009f07900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.974146] ffff888009f07980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.975002] >ffff888009f07a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.975835] ^ [ 32.976525] ffff888009f07a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.977384] ffff888009f07b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.978231] ================================================================== [ 32.979183] Disabling lock debugging due to kernel taint [ 34.885186] BUG: Bad rss-counter state mm:0000000067b2040c type:MM_FILEPAGES val:33 [ 34.886189] BUG: Bad rss-counter state mm:0000000067b2040c type:MM_ANONPAGES val:22 [ 35.427631] BUG: Bad rss-counter state mm:00000000c5addabd type:MM_FILEPAGES val:33 [ 35.428848] BUG: Bad rss-counter state mm:00000000c5addabd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1538' (ECDSA) to the list of known hosts. 2023/06/19 14:20:16 fuzzer started 2023/06/19 14:20:17 dialing manager at localhost:44161 2023/06/19 14:20:17 checking machine... 2023/06/19 14:20:17 checking revisions... [ 36.044078] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:20:17 testing simple program... [ 36.084169] cgroup: Unknown subsys name 'net' [ 36.131687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86136d88 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801917f788 RSP=ffff88801917f6c0 R8 =ffffffff86136d8c R9 =ffff88801917f770 R10=0000000000038001 R11=0000000000020c48 R12=ffff88801917f790 R13=ffff88801917f778 R14=0000000000000004 R15=ffff88801917f730 RIP=ffffffff81130b1f 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 00007f81259df700 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=00007f6fef934000 CR3=000000000cbfe000 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=2036313a30323a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a30323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c11183 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=dffffc0000000000 RSI=0000000000000000 RDI=ffff888008e57980 RBP=ffff888008e57988 RSP=ffff888008e57870 R8 =ffffffff86088c1e R9 =ffff888008e57970 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e57990 R13=ffff888008e57978 R14=ffff888008e579c8 R15=ffff888008e57930 RIP=ffffffff8113173f RFL=00000212 [----A--] 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 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=00007fff317ef000 CR3=00000000180f4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000