syzkaller login: [ 28.702584] BUG: Bad rss-counter state mm:0000000071ae416d type:MM_FILEPAGES val:33 [ 28.703526] BUG: Bad rss-counter state mm:0000000071ae416d type:MM_ANONPAGES val:22 [ 28.878135] ================================================================== [ 28.879011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.879890] Read of size 8 at addr ffff88800e2096b0 by task sshd/222 [ 28.880642] [ 28.880928] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.881743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.882726] Call Trace: [ 28.883029] [ 28.883301] dump_stack_lvl+0x91/0xf0 [ 28.883767] print_report+0xcc/0x620 [ 28.884235] ? __virt_addr_valid+0x102/0x340 [ 28.884777] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885374] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885977] kasan_report+0xbe/0xf0 [ 28.886433] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887028] vma_interval_tree_remove+0xc75/0xec0 [ 28.887602] vma_prepare+0xc54/0x11a0 [ 28.888051] __split_vma+0x5af/0x950 [ 28.888518] ? __pfx___split_vma+0x10/0x10 [ 28.889035] ? find_held_lock+0x2c/0x110 [ 28.889521] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.890063] ? lock_is_held_type+0x9f/0x120 [ 28.890583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.891167] ? mtree_range_walk+0x632/0x900 [ 28.891692] ? mas_walk+0x5c7/0x7c0 [ 28.892181] do_vmi_munmap+0x1f1/0x2b0 [ 28.892720] mmap_region+0x1f9/0x2660 [ 28.893199] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.893710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.894515] ? __pfx_lock_acquire+0x10/0x10 [ 28.895088] ? __pfx_mmap_region+0x10/0x10 [ 28.895610] ? security_mmap_addr+0x7d/0xa0 [ 28.896144] ? get_unmapped_area+0x1f5/0x3f0 [ 28.896702] do_mmap+0x854/0xf00 [ 28.897140] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.897649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.898259] ksys_mmap_pgoff+0x3af/0x500 [ 28.898764] do_syscall_64+0x3f/0x90 [ 28.899251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.899931] RIP: 0033:0x7f4524f26d82 [ 28.900428] 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 [ 28.902597] RSP: 002b:00007ffd6eeab658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.903507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4524f26d82 [ 28.904347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4524360000 [ 28.905181] RBP: 00007f4524360000 R08: 0000000000000009 R09: 0000000000001000 [ 28.906113] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d8c330980 [ 28.906957] R13: 00007ffd6eeab670 R14: 00007ffd6eeab6a0 R15: 00007ffd6eeaba00 [ 28.907840] [ 28.908153] [ 28.908372] Allocated by task 212: [ 28.908792] kasan_save_stack+0x22/0x50 [ 28.909303] kasan_set_track+0x25/0x30 [ 28.909837] __kasan_slab_alloc+0x59/0x70 [ 28.910360] kmem_cache_alloc+0x16b/0x370 [ 28.910887] vm_area_dup+0x20/0x160 [ 28.911366] __split_vma+0x170/0x950 [ 28.911850] split_vma+0xc6/0x110 [ 28.912281] mprotect_fixup+0x8d2/0xb30 [ 28.912781] do_mprotect_pkey+0x87e/0xd40 [ 28.913291] __x64_sys_mprotect+0x78/0xc0 [ 28.913836] do_syscall_64+0x3f/0x90 [ 28.914321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914971] [ 28.915187] Freed by task 212: [ 28.915613] kasan_save_stack+0x22/0x50 [ 28.916112] kasan_set_track+0x25/0x30 [ 28.916608] kasan_save_free_info+0x2b/0x50 [ 28.917176] __kasan_slab_free+0x10a/0x190 [ 28.917722] kmem_cache_free+0x10d/0x4d0 [ 28.918232] rcu_core+0x8c8/0x2860 [ 28.918690] __do_softirq+0x1b7/0x7d4 [ 28.919163] [ 28.919379] Last potentially related work creation: [ 28.919958] kasan_save_stack+0x22/0x50 [ 28.920487] __kasan_record_aux_stack+0x8e/0xa0 [ 28.921054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.921695] remove_vma+0x139/0x170 [ 28.922186] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.922755] do_vmi_munmap+0x1f1/0x2b0 [ 28.923237] __vm_munmap+0x138/0x3a0 [ 28.923722] __x64_sys_munmap+0x59/0x80 [ 28.924245] do_syscall_64+0x3f/0x90 [ 28.924721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.925361] [ 28.925597] Second to last potentially related work creation: [ 28.926306] kasan_save_stack+0x22/0x50 [ 28.926813] __kasan_record_aux_stack+0x8e/0xa0 [ 28.927432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.928110] remove_vma+0x139/0x170 [ 28.928556] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.929126] do_vmi_munmap+0x1f1/0x2b0 [ 28.929655] mmap_region+0x1f9/0x2660 [ 28.930136] do_mmap+0x854/0xf00 [ 28.930568] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.931054] ksys_mmap_pgoff+0x3af/0x500 [ 28.931573] do_syscall_64+0x3f/0x90 [ 28.932047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932688] [ 28.932919] The buggy address belongs to the object at ffff88800e209658 [ 28.932919] which belongs to the cache vm_area_struct of size 168 [ 28.934434] The buggy address is located 88 bytes inside of [ 28.934434] freed 168-byte region [ffff88800e209658, ffff88800e209700) [ 28.935887] [ 28.936103] The buggy address belongs to the physical page: [ 28.936762] page:000000003e248c01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe209 [ 28.937856] memcg:ffff88800dd6e001 [ 28.938288] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.938990] page_type: 0xffffffff() [ 28.939439] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.940345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6e001 [ 28.941272] page dumped because: kasan: bad access detected [ 28.941939] [ 28.942160] Memory state around the buggy address: [ 28.942789] ffff88800e209580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.943638] ffff88800e209600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.944533] >ffff88800e209680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.945389] ^ [ 28.945987] ffff88800e209700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 28.946878] ffff88800e209780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.947762] ================================================================== [ 28.948757] Disabling lock debugging due to kernel taint [ 31.444597] BUG: Bad rss-counter state mm:000000001ef0c296 type:MM_FILEPAGES val:33 [ 31.446258] BUG: Bad rss-counter state mm:000000001ef0c296 type:MM_ANONPAGES val:22 [ 31.940802] BUG: Bad rss-counter state mm:000000008a7006f4 type:MM_FILEPAGES val:33 [ 31.941788] BUG: Bad rss-counter state mm:000000008a7006f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27041' (ECDSA) to the list of known hosts. 2023/06/20 19:04:02 fuzzer started 2023/06/20 19:04:02 dialing manager at localhost:36067 2023/06/20 19:04:02 checking machine... 2023/06/20 19:04:02 checking revisions... [ 32.663908] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:04:02 testing simple program... [ 32.714875] cgroup: Unknown subsys name 'net' [ 32.767498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:01 Registers: info registers vcpu 0 RAX=ffff88801a959ab0 RBX=0000000000000000 RCX=ffffea00006a5640 RDX=ffff88800844f780 RSI=000000001a959000 RDI=ffff888000000000 RBP=ffffffff813782f8 RSP=ffff888016977d48 R8 =ffffea0000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=ffff88801a959ab0 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88801a959b30 RIP=ffffffff8180c9d8 RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0e29998900 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=00007f0e29f4d650 CR3=000000000f066000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffff0000000000000000000000ffff00 XMM03=617265737520646e61202c737265626d XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=00002e72657375206568742066000023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff110032d8eec RSI=ffffffff819786b9 RDI=ffff8880196c7760 RBP=ffffea00006b04a8 RSP=ffff88800eb4f8c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffffea00006b0480 R13=0000000000000000 R14=0000000000000bd3 R15=0000000000000000 RIP=ffffffff819786d7 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 00007fee6db9a700 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=00007ffd7ea32b48 CR3=000000000d874000 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=2031303a34303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a34303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000