syzkaller login: [ 29.101477] BUG: Bad rss-counter state mm:000000002e094918 type:MM_FILEPAGES val:33 [ 29.102742] BUG: Bad rss-counter state mm:000000002e094918 type:MM_ANONPAGES val:22 [ 29.260721] ================================================================== [ 29.261643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.262672] Read of size 8 at addr ffff88800eb5ac20 by task sshd/219 [ 29.263581] [ 29.263837] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.265034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.266057] Call Trace: [ 29.266380] [ 29.266675] dump_stack_lvl+0x91/0xf0 [ 29.267165] print_report+0xcc/0x620 [ 29.267650] ? __virt_addr_valid+0x102/0x340 [ 29.268208] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.268836] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.269483] kasan_report+0xbe/0xf0 [ 29.269963] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.270609] vma_interval_tree_remove+0xc75/0xec0 [ 29.271240] vma_prepare+0xc54/0x11a0 [ 29.271743] __split_vma+0x5af/0x950 [ 29.272235] ? __pfx___split_vma+0x10/0x10 [ 29.272786] ? find_held_lock+0x2c/0x110 [ 29.273324] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.273935] ? lock_is_held_type+0x9f/0x120 [ 29.274488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.275119] ? mtree_range_walk+0x632/0x900 [ 29.275694] ? mas_walk+0x5c7/0x7c0 [ 29.276189] do_vmi_munmap+0x1f1/0x2b0 [ 29.276712] mmap_region+0x1f9/0x2660 [ 29.277206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.277746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.278486] ? __pfx_lock_acquire+0x10/0x10 [ 29.279045] ? __pfx_mmap_region+0x10/0x10 [ 29.279590] ? security_mmap_addr+0x7d/0xa0 [ 29.280143] ? get_unmapped_area+0x1f5/0x3f0 [ 29.280709] do_mmap+0x854/0xf00 [ 29.281163] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.281683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.282273] ksys_mmap_pgoff+0x3af/0x500 [ 29.282796] do_syscall_64+0x3f/0x90 [ 29.283291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.283962] RIP: 0033:0x7f77b4322d82 [ 29.284439] 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 [ 29.286942] RSP: 002b:00007ffd7ef79118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.288053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77b4322d82 [ 29.289097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77b375c000 [ 29.290157] RBP: 00007f77b375c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.291227] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d859313d90 [ 29.292264] R13: 00007ffd7ef79130 R14: 00007ffd7ef79160 R15: 00007ffd7ef794c0 [ 29.293325] [ 29.293703] [ 29.293964] Allocated by task 212: [ 29.294453] kasan_save_stack+0x22/0x50 [ 29.294978] kasan_set_track+0x25/0x30 [ 29.295493] __kasan_slab_alloc+0x59/0x70 [ 29.296040] kmem_cache_alloc+0x16b/0x370 [ 29.296582] vm_area_dup+0x20/0x160 [ 29.297050] __split_vma+0x170/0x950 [ 29.297541] split_vma+0xc6/0x110 [ 29.298000] mprotect_fixup+0x8d2/0xb30 [ 29.298519] do_mprotect_pkey+0x87e/0xd40 [ 29.299054] __x64_sys_mprotect+0x78/0xc0 [ 29.299601] do_syscall_64+0x3f/0x90 [ 29.300096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.300770] [ 29.300992] Freed by task 212: [ 29.301402] kasan_save_stack+0x22/0x50 [ 29.301961] kasan_set_track+0x25/0x30 [ 29.302480] kasan_save_free_info+0x2b/0x50 [ 29.303032] __kasan_slab_free+0x10a/0x190 [ 29.303589] kmem_cache_free+0x10d/0x4d0 [ 29.304123] rcu_core+0x8c8/0x2860 [ 29.304588] __do_softirq+0x1b7/0x7d4 [ 29.305079] [ 29.305305] Last potentially related work creation: [ 29.306008] kasan_save_stack+0x22/0x50 [ 29.306530] __kasan_record_aux_stack+0x8e/0xa0 [ 29.307130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.307808] remove_vma+0x139/0x170 [ 29.308278] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.308855] do_vmi_munmap+0x1f1/0x2b0 [ 29.309363] __vm_munmap+0x138/0x3a0 [ 29.309885] __x64_sys_munmap+0x59/0x80 [ 29.310404] do_syscall_64+0x3f/0x90 [ 29.310902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.311612] [ 29.311839] Second to last potentially related work creation: [ 29.312574] kasan_save_stack+0x22/0x50 [ 29.313106] __kasan_record_aux_stack+0x8e/0xa0 [ 29.313721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.314408] remove_vma+0x139/0x170 [ 29.314895] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.315481] do_vmi_munmap+0x1f1/0x2b0 [ 29.315997] __vm_munmap+0x138/0x3a0 [ 29.316494] __x64_sys_munmap+0x59/0x80 [ 29.317017] do_syscall_64+0x3f/0x90 [ 29.317527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.318200] [ 29.318428] The buggy address belongs to the object at ffff88800eb5abc8 [ 29.318428] which belongs to the cache vm_area_struct of size 168 [ 29.319991] The buggy address is located 88 bytes inside of [ 29.319991] freed 168-byte region [ffff88800eb5abc8, ffff88800eb5ac70) [ 29.321502] [ 29.321732] The buggy address belongs to the physical page: [ 29.322439] page:0000000012dcc982 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb5a [ 29.323605] memcg:ffff88800ec8e701 [ 29.324052] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.324793] page_type: 0xffffffff() [ 29.325267] raw: 0100000000000200 ffff88800879fc80 ffffea00003bd140 dead000000000003 [ 29.326258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec8e701 [ 29.327229] page dumped because: kasan: bad access detected [ 29.327932] [ 29.328161] Memory state around the buggy address: [ 29.328785] ffff88800eb5ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.329711] ffff88800eb5ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.330637] >ffff88800eb5ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.331560] ^ [ 29.332124] ffff88800eb5ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.333043] ffff88800eb5ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.333961] ================================================================== [ 29.335049] Disabling lock debugging due to kernel taint [ 31.708113] BUG: Bad rss-counter state mm:00000000253fdc1b type:MM_FILEPAGES val:33 [ 31.709443] BUG: Bad rss-counter state mm:00000000253fdc1b type:MM_ANONPAGES val:22 [ 32.210676] BUG: Bad rss-counter state mm:0000000090083e30 type:MM_FILEPAGES val:33 [ 32.211899] BUG: Bad rss-counter state mm:0000000090083e30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61594' (ECDSA) to the list of known hosts. 2023/06/19 13:34:30 fuzzer started 2023/06/19 13:34:30 dialing manager at localhost:44161 2023/06/19 13:34:30 checking machine... 2023/06/19 13:34:30 checking revisions... [ 32.866205] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:34:30 testing simple program... [ 32.916553] cgroup: Unknown subsys name 'net' [ 32.974609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880181f9b40 RSI=ffffffff836984cd RDI=ffff88800f169500 RBP=ffff88800c559800 RSP=ffff88800e7df9b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800c559d10 R13=ffff88801a39c280 R14=ffff88800e7dfa88 R15=ffff88800f169500 RIP=ffffffff83684dc4 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 00007fe96f114700 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=00007f06f7d0d650 CR3=0000000009a00000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36303835352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363038 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa408ea4210 CR3=000000000d98a000 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=1d9a30cc34055aa2f74a6831d4c5e66b XMM02=ec2efd57dc4c00df000000000011dbe0 XMM03=ed1034baa116c9a8000000000011dcb0 XMM04=beb251232180b75100000000000ae988 XMM05=53a9d632545a417d0000000000135f78 XMM06=806171799158d96700000000001349f8 XMM07=fb795ef6d65770560000000000123f00 XMM08=2c67c8bc2e329bc3000000000011dc50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000