syzkaller login: [ 40.056813] BUG: Bad rss-counter state mm:000000008110f5b8 type:MM_FILEPAGES val:33 [ 40.057819] BUG: Bad rss-counter state mm:000000008110f5b8 type:MM_ANONPAGES val:22 [ 40.245888] ================================================================== [ 40.246962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.248097] Read of size 8 at addr ffff88800eecd880 by task sshd/222 [ 40.249116] [ 40.249379] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.250406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.251597] Call Trace: [ 40.251980] [ 40.252315] dump_stack_lvl+0x91/0xf0 [ 40.252894] print_report+0xcc/0x620 [ 40.253488] ? __virt_addr_valid+0x102/0x340 [ 40.254150] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.254807] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.255426] kasan_report+0xbe/0xf0 [ 40.255894] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.256509] vma_interval_tree_remove+0xc75/0xec0 [ 40.257101] vma_prepare+0xc54/0x11a0 [ 40.257593] __split_vma+0x5af/0x950 [ 40.258058] ? __pfx___split_vma+0x10/0x10 [ 40.258585] ? find_held_lock+0x2c/0x110 [ 40.259096] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.259699] ? lock_is_held_type+0x9f/0x120 [ 40.260271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.260925] ? mtree_range_walk+0x632/0x900 [ 40.261525] ? mas_walk+0x5c7/0x7c0 [ 40.262017] do_vmi_munmap+0x1f1/0x2b0 [ 40.262545] mmap_region+0x1f9/0x2660 [ 40.263045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.263551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.264257] ? __pfx_lock_acquire+0x10/0x10 [ 40.264778] ? __pfx_mmap_region+0x10/0x10 [ 40.265318] ? security_mmap_addr+0x7d/0xa0 [ 40.265847] ? get_unmapped_area+0x1f5/0x3f0 [ 40.266386] do_mmap+0x854/0xf00 [ 40.266812] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.267293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.267845] ksys_mmap_pgoff+0x3af/0x500 [ 40.268336] do_syscall_64+0x3f/0x90 [ 40.268806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.269437] RIP: 0033:0x7f4d9ac13d82 [ 40.269886] 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 [ 40.271940] RSP: 002b:00007fff37764e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.272807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d9ac13d82 [ 40.273638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d9a04d000 [ 40.274455] RBP: 00007f4d9a04d000 R08: 0000000000000009 R09: 0000000000001000 [ 40.275274] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605610d1ec0 [ 40.276096] R13: 00007fff37764e20 R14: 00007fff37764e50 R15: 00007fff377651b0 [ 40.276987] [ 40.277285] [ 40.277541] Allocated by task 212: [ 40.277984] kasan_save_stack+0x22/0x50 [ 40.278506] kasan_set_track+0x25/0x30 [ 40.279015] __kasan_slab_alloc+0x59/0x70 [ 40.279560] kmem_cache_alloc+0x16b/0x370 [ 40.280083] vm_area_dup+0x20/0x160 [ 40.280540] __split_vma+0x170/0x950 [ 40.280998] split_vma+0xc6/0x110 [ 40.281448] mprotect_fixup+0x8d2/0xb30 [ 40.281947] do_mprotect_pkey+0x87e/0xd40 [ 40.282459] __x64_sys_mprotect+0x78/0xc0 [ 40.282971] do_syscall_64+0x3f/0x90 [ 40.283436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.284058] [ 40.284267] Freed by task 212: [ 40.284643] kasan_save_stack+0x22/0x50 [ 40.285139] kasan_set_track+0x25/0x30 [ 40.285638] kasan_save_free_info+0x2b/0x50 [ 40.286168] __kasan_slab_free+0x10a/0x190 [ 40.286720] kmem_cache_free+0x10d/0x4d0 [ 40.287267] rcu_core+0x8c8/0x2860 [ 40.287727] __do_softirq+0x1b7/0x7d4 [ 40.288217] [ 40.288439] Last potentially related work creation: [ 40.289011] kasan_save_stack+0x22/0x50 [ 40.289531] __kasan_record_aux_stack+0x8e/0xa0 [ 40.290096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.290736] remove_vma+0x139/0x170 [ 40.291177] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.291729] do_vmi_munmap+0x1f1/0x2b0 [ 40.292204] __vm_munmap+0x138/0x3a0 [ 40.292658] __x64_sys_munmap+0x59/0x80 [ 40.293148] do_syscall_64+0x3f/0x90 [ 40.293624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.294244] [ 40.294456] Second to last potentially related work creation: [ 40.295120] kasan_save_stack+0x22/0x50 [ 40.295617] __kasan_record_aux_stack+0x8e/0xa0 [ 40.296178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.296819] remove_vma+0x139/0x170 [ 40.297256] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.297810] do_vmi_munmap+0x1f1/0x2b0 [ 40.298284] mmap_region+0x1f9/0x2660 [ 40.298749] do_mmap+0x854/0xf00 [ 40.299167] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.299635] ksys_mmap_pgoff+0x3af/0x500 [ 40.300131] do_syscall_64+0x3f/0x90 [ 40.300596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.301216] [ 40.301445] The buggy address belongs to the object at ffff88800eecd828 [ 40.301445] which belongs to the cache vm_area_struct of size 168 [ 40.302871] The buggy address is located 88 bytes inside of [ 40.302871] freed 168-byte region [ffff88800eecd828, ffff88800eecd8d0) [ 40.304232] [ 40.304448] The buggy address belongs to the physical page: [ 40.305089] page:00000000a321734a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeecd [ 40.306162] memcg:ffff88800d41d701 [ 40.306576] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.307250] page_type: 0xffffffff() [ 40.307685] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.308572] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d41d701 [ 40.309461] page dumped because: kasan: bad access detected [ 40.310098] [ 40.310306] Memory state around the buggy address: [ 40.310872] ffff88800eecd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.311705] ffff88800eecd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.312540] >ffff88800eecd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.313374] ^ [ 40.313775] ffff88800eecd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.314604] ffff88800eecd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 40.315422] ================================================================== [ 40.316400] Disabling lock debugging due to kernel taint [ 42.342600] BUG: Bad rss-counter state mm:0000000084062822 type:MM_FILEPAGES val:33 [ 42.343782] BUG: Bad rss-counter state mm:0000000084062822 type:MM_ANONPAGES val:22 [ 42.722676] BUG: Bad rss-counter state mm:00000000a7e82249 type:MM_FILEPAGES val:33 [ 42.724370] BUG: Bad rss-counter state mm:00000000a7e82249 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57640' (ECDSA) to the list of known hosts. 2023/06/19 21:19:02 fuzzer started 2023/06/19 21:19:02 dialing manager at localhost:44161 2023/06/19 21:19:02 checking machine... 2023/06/19 21:19:02 checking revisions... [ 43.431863] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:19:02 testing simple program... [ 43.486463] cgroup: Unknown subsys name 'net' [ 43.550396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:50 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=ffff888014752200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888014752200 RBP=0000000000001000 RSP=ffff8880147ff808 R8 =ffff888014752200 R9 =0000000000000000 R10=ffff8880147ff850 R11=ffffffff81806df1 R12=ffff888014752200 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8180fecf 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 00007f6bf43ae900 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=00007fd6f02ea650 CR3=000000000ca8e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7adb5c5e8291521b00000000000ae988 XMM05=a73958981a3098570000000000135e10 XMM06=19e9129bd510f2350000000000134ca8 XMM07=fb795ef6d65770560000000000123600 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=000056440624eb40 CR3=000000000b94a000 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=2032303a39313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000