syzkaller login: [ 28.732854] BUG: Bad rss-counter state mm:0000000043a5ede0 type:MM_FILEPAGES val:33 [ 28.733812] BUG: Bad rss-counter state mm:0000000043a5ede0 type:MM_ANONPAGES val:22 [ 28.880654] ================================================================== [ 28.881553] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.882486] Read of size 8 at addr ffff8880198b1880 by task sshd/220 [ 28.883239] [ 28.883451] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.884457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.885425] Call Trace: [ 28.885729] [ 28.886007] dump_stack_lvl+0x91/0xf0 [ 28.886499] print_report+0xcc/0x620 [ 28.886979] ? __virt_addr_valid+0x102/0x340 [ 28.887526] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888127] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888758] kasan_report+0xbe/0xf0 [ 28.889227] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889837] vma_interval_tree_remove+0xc75/0xec0 [ 28.890428] vma_prepare+0xc54/0x11a0 [ 28.890905] __split_vma+0x5af/0x950 [ 28.891372] ? __pfx___split_vma+0x10/0x10 [ 28.891891] ? find_held_lock+0x2c/0x110 [ 28.892428] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.892998] ? lock_is_held_type+0x9f/0x120 [ 28.893536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.894137] ? mtree_range_walk+0x632/0x900 [ 28.894689] ? mas_walk+0x5c7/0x7c0 [ 28.895170] do_vmi_munmap+0x1f1/0x2b0 [ 28.895659] mmap_region+0x1f9/0x2660 [ 28.896137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.896644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.897356] ? __pfx_lock_acquire+0x10/0x10 [ 28.897882] ? __pfx_mmap_region+0x10/0x10 [ 28.898410] ? security_mmap_addr+0x7d/0xa0 [ 28.898937] ? get_unmapped_area+0x1f5/0x3f0 [ 28.899485] do_mmap+0x854/0xf00 [ 28.899919] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.900431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900994] ksys_mmap_pgoff+0x3af/0x500 [ 28.901497] do_syscall_64+0x3f/0x90 [ 28.901980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902621] RIP: 0033:0x7f201a2ded82 [ 28.903078] 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 [ 28.905202] RSP: 002b:00007fff0f5d1bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.906099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f201a2ded82 [ 28.906939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2019718000 [ 28.907777] RBP: 00007f2019718000 R08: 0000000000000009 R09: 0000000000001000 [ 28.908632] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b50c68d90 [ 28.909473] R13: 00007fff0f5d1bd0 R14: 00007fff0f5d1c00 R15: 00007fff0f5d1f60 [ 28.910313] [ 28.910609] [ 28.910817] Allocated by task 213: [ 28.911245] kasan_save_stack+0x22/0x50 [ 28.911739] kasan_set_track+0x25/0x30 [ 28.912220] __kasan_slab_alloc+0x59/0x70 [ 28.912758] kmem_cache_alloc+0x16b/0x370 [ 28.913274] vm_area_dup+0x20/0x160 [ 28.913726] __split_vma+0x170/0x950 [ 28.914185] split_vma+0xc6/0x110 [ 28.914618] mprotect_fixup+0x8d2/0xb30 [ 28.915109] do_mprotect_pkey+0x87e/0xd40 [ 28.915636] __x64_sys_mprotect+0x78/0xc0 [ 28.916150] do_syscall_64+0x3f/0x90 [ 28.916634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917281] [ 28.917503] Freed by task 213: [ 28.917889] kasan_save_stack+0x22/0x50 [ 28.918386] kasan_set_track+0x25/0x30 [ 28.918875] kasan_save_free_info+0x2b/0x50 [ 28.919403] __kasan_slab_free+0x10a/0x190 [ 28.919933] kmem_cache_free+0x10d/0x4d0 [ 28.920458] rcu_core+0x8c8/0x2860 [ 28.920902] __do_softirq+0x1b7/0x7d4 [ 28.921372] [ 28.921584] Last potentially related work creation: [ 28.922169] kasan_save_stack+0x22/0x50 [ 28.922668] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.923883] remove_vma+0x139/0x170 [ 28.924333] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.924947] do_vmi_munmap+0x1f1/0x2b0 [ 28.925435] __vm_munmap+0x138/0x3a0 [ 28.925891] __x64_sys_munmap+0x59/0x80 [ 28.926375] do_syscall_64+0x3f/0x90 [ 28.926853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927488] [ 28.927702] Second to last potentially related work creation: [ 28.928406] kasan_save_stack+0x22/0x50 [ 28.928890] __kasan_record_aux_stack+0x8e/0xa0 [ 28.929454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.930077] remove_vma+0x139/0x170 [ 28.930520] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.931075] do_vmi_munmap+0x1f1/0x2b0 [ 28.931556] mmap_region+0x1f9/0x2660 [ 28.932022] do_mmap+0x854/0xf00 [ 28.932456] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.932939] ksys_mmap_pgoff+0x3af/0x500 [ 28.933434] do_syscall_64+0x3f/0x90 [ 28.933903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.934527] [ 28.934735] The buggy address belongs to the object at ffff8880198b1828 [ 28.934735] which belongs to the cache vm_area_struct of size 168 [ 28.936165] The buggy address is located 88 bytes inside of [ 28.936165] freed 168-byte region [ffff8880198b1828, ffff8880198b18d0) [ 28.937527] [ 28.937735] The buggy address belongs to the physical page: [ 28.938379] page:00000000381624cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198b1 [ 28.939446] memcg:ffff88801989ab01 [ 28.939866] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.940571] page_type: 0xffffffff() [ 28.941018] raw: 0100000000000200 ffff8880087a0c80 ffffea0000601a00 dead000000000005 [ 28.941913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801989ab01 [ 28.942824] page dumped because: kasan: bad access detected [ 28.943489] [ 28.943707] Memory state around the buggy address: [ 28.944301] ffff8880198b1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.945169] ffff8880198b1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.946050] >ffff8880198b1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.946912] ^ [ 28.947333] ffff8880198b1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.948208] ffff8880198b1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 28.949101] ================================================================== [ 28.950115] Disabling lock debugging due to kernel taint [ 31.789516] BUG: Bad rss-counter state mm:000000003a05d276 type:MM_FILEPAGES val:33 [ 31.790690] BUG: Bad rss-counter state mm:000000003a05d276 type:MM_ANONPAGES val:22 [ 32.364588] BUG: Bad rss-counter state mm:000000006aebdbc4 type:MM_FILEPAGES val:33 [ 32.365615] BUG: Bad rss-counter state mm:000000006aebdbc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36954' (ECDSA) to the list of known hosts. 2023/06/20 23:18:32 fuzzer started 2023/06/20 23:18:32 dialing manager at localhost:36067 2023/06/20 23:18:32 checking machine... 2023/06/20 23:18:32 checking revisions... [ 32.996960] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:18:32 testing simple program... [ 33.044736] cgroup: Unknown subsys name 'net' [ 33.102076] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:18:32 Registers: info registers vcpu 0 RAX=1ffffffff0bb133f RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888008d9f870 R8 =ffffffff8608a556 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 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=00007f53b7a010b0 CR3=000000000e334000 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=38313a3332203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323031 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f2c4f3064b0 CR3=000000000cc08000 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=c06e5327ea412a822640d7b190394ad0 XMM02=ec2efd57dc4c00df000000000011d538 XMM03=f257f01f59705ad5000000000011d608 XMM04=78f104ebf81cc9e500000000000ae988 XMM05=acceb0142ce090110000000000133ca8 XMM06=4fda316b135da52b0000000000132d48 XMM07=e042d86d42eb936e0000000000121f60 XMM08=f257f01f59705ad5000000000011d608 XMM09=00000000000000000000000000000000 XMM10=20202000000020202020202000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000