syzkaller login: [ 30.112016] BUG: Bad rss-counter state mm:000000008d98a91a type:MM_FILEPAGES val:33 [ 30.113036] BUG: Bad rss-counter state mm:000000008d98a91a type:MM_ANONPAGES val:22 [ 30.274865] ================================================================== [ 30.275764] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.276699] Read of size 8 at addr ffff88800db004e0 by task sshd/221 [ 30.277427] [ 30.277632] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.278527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.279435] Call Trace: [ 30.279731] [ 30.280007] dump_stack_lvl+0x91/0xf0 [ 30.280481] print_report+0xcc/0x620 [ 30.280940] ? __virt_addr_valid+0x102/0x340 [ 30.281459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282039] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282614] kasan_report+0xbe/0xf0 [ 30.283059] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.283641] vma_interval_tree_remove+0xc75/0xec0 [ 30.284229] vma_prepare+0xc54/0x11a0 [ 30.284680] __split_vma+0x5af/0x950 [ 30.285125] ? __pfx___split_vma+0x10/0x10 [ 30.285629] ? find_held_lock+0x2c/0x110 [ 30.286120] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.286650] ? lock_is_held_type+0x9f/0x120 [ 30.287157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.287746] ? mtree_range_walk+0x632/0x900 [ 30.288289] ? mas_walk+0x5c7/0x7c0 [ 30.288757] do_vmi_munmap+0x1f1/0x2b0 [ 30.289232] mmap_region+0x1f9/0x2660 [ 30.289702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.290201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.290915] ? __pfx_lock_acquire+0x10/0x10 [ 30.291435] ? __pfx_mmap_region+0x10/0x10 [ 30.291963] ? security_mmap_addr+0x7d/0xa0 [ 30.292499] ? get_unmapped_area+0x1f5/0x3f0 [ 30.293028] do_mmap+0x854/0xf00 [ 30.293453] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.293940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.294483] ksys_mmap_pgoff+0x3af/0x500 [ 30.294978] do_syscall_64+0x3f/0x90 [ 30.295441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.296069] RIP: 0033:0x7fbbc659dd82 [ 30.296516] 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 [ 30.298574] RSP: 002b:00007ffd5d6a3a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.299449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbc659dd82 [ 30.300279] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbc59d7000 [ 30.301104] RBP: 00007fbbc59d7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.301946] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610bf370ec0 [ 30.302777] R13: 00007ffd5d6a3a40 R14: 00007ffd5d6a3a70 R15: 00007ffd5d6a3dd0 [ 30.303619] [ 30.303906] [ 30.304115] Allocated by task 214: [ 30.304566] kasan_save_stack+0x22/0x50 [ 30.305054] kasan_set_track+0x25/0x30 [ 30.305542] __kasan_slab_alloc+0x59/0x70 [ 30.306054] kmem_cache_alloc+0x16b/0x370 [ 30.306564] vm_area_dup+0x20/0x160 [ 30.307019] __split_vma+0x170/0x950 [ 30.307474] split_vma+0xc6/0x110 [ 30.307897] mprotect_fixup+0x8d2/0xb30 [ 30.308385] do_mprotect_pkey+0x87e/0xd40 [ 30.308895] __x64_sys_mprotect+0x78/0xc0 [ 30.309411] do_syscall_64+0x3f/0x90 [ 30.309898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310570] [ 30.310786] Freed by task 214: [ 30.311172] kasan_save_stack+0x22/0x50 [ 30.311672] kasan_set_track+0x25/0x30 [ 30.312172] kasan_save_free_info+0x2b/0x50 [ 30.312700] __kasan_slab_free+0x10a/0x190 [ 30.313236] kmem_cache_free+0x10d/0x4d0 [ 30.313744] rcu_core+0x8c8/0x2860 [ 30.314190] __do_softirq+0x1b7/0x7d4 [ 30.314670] [ 30.314893] Last potentially related work creation: [ 30.315481] kasan_save_stack+0x22/0x50 [ 30.315989] __kasan_record_aux_stack+0x8e/0xa0 [ 30.316575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.317218] remove_vma+0x139/0x170 [ 30.317666] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.318220] do_vmi_munmap+0x1f1/0x2b0 [ 30.318709] __vm_munmap+0x138/0x3a0 [ 30.319180] __x64_sys_munmap+0x59/0x80 [ 30.319671] do_syscall_64+0x3f/0x90 [ 30.320150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.320786] [ 30.320999] Second to last potentially related work creation: [ 30.321682] kasan_save_stack+0x22/0x50 [ 30.322188] __kasan_record_aux_stack+0x8e/0xa0 [ 30.322758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.323393] remove_vma+0x139/0x170 [ 30.323842] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.324415] do_vmi_munmap+0x1f1/0x2b0 [ 30.324896] mmap_region+0x1f9/0x2660 [ 30.325369] do_mmap+0x854/0xf00 [ 30.325793] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.326277] ksys_mmap_pgoff+0x7d/0x500 [ 30.326764] do_syscall_64+0x3f/0x90 [ 30.327234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.327872] [ 30.328084] The buggy address belongs to the object at ffff88800db00488 [ 30.328084] which belongs to the cache vm_area_struct of size 168 [ 30.329549] The buggy address is located 88 bytes inside of [ 30.329549] freed 168-byte region [ffff88800db00488, ffff88800db00530) [ 30.330947] [ 30.331161] The buggy address belongs to the physical page: [ 30.331821] page:00000000753efa79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb00 [ 30.332910] memcg:ffff88800e4f3701 [ 30.333330] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.334017] page_type: 0xffffffff() [ 30.334470] raw: 0100000000000200 ffff8880087a0c80 ffffea0000366080 dead000000000007 [ 30.335385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4f3701 [ 30.336297] page dumped because: kasan: bad access detected [ 30.336948] [ 30.337162] Memory state around the buggy address: [ 30.337733] ffff88800db00380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.338589] ffff88800db00400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.339429] >ffff88800db00480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.340279] ^ [ 30.341026] ffff88800db00500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.341879] ffff88800db00580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.342722] ================================================================== [ 30.343678] Disabling lock debugging due to kernel taint [ 32.246822] BUG: Bad rss-counter state mm:000000007cada6bf type:MM_FILEPAGES val:33 [ 32.247837] BUG: Bad rss-counter state mm:000000007cada6bf type:MM_ANONPAGES val:22 [ 32.747372] BUG: Bad rss-counter state mm:00000000e1b6f3ff type:MM_FILEPAGES val:33 [ 32.748379] BUG: Bad rss-counter state mm:00000000e1b6f3ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45842' (ECDSA) to the list of known hosts. 2023/06/21 04:28:21 fuzzer started 2023/06/21 04:28:22 dialing manager at localhost:36067 2023/06/21 04:28:22 checking machine... 2023/06/21 04:28:22 checking revisions... [ 33.492906] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:28:22 testing simple program... [ 33.541699] cgroup: Unknown subsys name 'net' [ 33.594042] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:28:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880182aedf4 RCX=1ffff11003055daa RDX=0000000000000004 RSI=ffff888014672308 RDI=ffff8880182aedec RBP=000000000000006a RSP=ffff8880147ef9f0 R8 =0000000000000001 R9 =ffff8880182aedec R10=ffff8880182aeda3 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880182aedfc R14=ffff8880182aedec R15=ffff8880182aed10 RIP=ffffffff844d8b8a RFL=00000297 [--S-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 00007ff5da3ab900 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=00007fbfdc244650 CR3=00000000102fe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=deb66e03ca888fc300000000000ae988 XMM05=ba3a8b4fd9479c4b0000000000134388 XMM06=c291bd5c70af25b90000000000133178 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007fffbfab2688 CR3=0000000010280000 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=2031323a38323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000