syzkaller login: [ 30.164930] BUG: Bad rss-counter state mm:00000000da6e0871 type:MM_FILEPAGES val:33 [ 30.165930] BUG: Bad rss-counter state mm:00000000da6e0871 type:MM_ANONPAGES val:22 [ 30.329505] ================================================================== [ 30.330421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.331382] Read of size 8 at addr ffff88800ddd9880 by task sshd/220 [ 30.332155] [ 30.332384] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.333348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.334332] Call Trace: [ 30.334654] [ 30.334952] dump_stack_lvl+0x91/0xf0 [ 30.335446] print_report+0xcc/0x620 [ 30.335936] ? __virt_addr_valid+0x102/0x340 [ 30.336500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337130] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337759] kasan_report+0xbe/0xf0 [ 30.338246] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.338881] vma_interval_tree_remove+0xc75/0xec0 [ 30.339523] vma_prepare+0xc54/0x11a0 [ 30.340010] __split_vma+0x5af/0x950 [ 30.340489] ? __pfx___split_vma+0x10/0x10 [ 30.341027] ? find_held_lock+0x2c/0x110 [ 30.341562] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.342140] ? lock_is_held_type+0x9f/0x120 [ 30.342694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.343324] ? mtree_range_walk+0x632/0x900 [ 30.343888] ? mas_walk+0x5c7/0x7c0 [ 30.344376] do_vmi_munmap+0x1f1/0x2b0 [ 30.344879] mmap_region+0x1f9/0x2660 [ 30.345371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.345887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.346613] ? __pfx_lock_acquire+0x10/0x10 [ 30.347178] ? __pfx_mmap_region+0x10/0x10 [ 30.347718] ? security_mmap_addr+0x7d/0xa0 [ 30.348257] ? get_unmapped_area+0x1f5/0x3f0 [ 30.348813] do_mmap+0x854/0xf00 [ 30.349260] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.349758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.350333] ksys_mmap_pgoff+0x3af/0x500 [ 30.350852] do_syscall_64+0x3f/0x90 [ 30.351358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352012] RIP: 0033:0x7f552e8c8d82 [ 30.352475] 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 [ 30.354629] RSP: 002b:00007fff93439cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.355564] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f552e8c8d82 [ 30.356435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f552dd02000 [ 30.357305] RBP: 00007f552dd02000 R08: 0000000000000009 R09: 0000000000001000 [ 30.358177] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560598fd3ec0 [ 30.359066] R13: 00007fff93439cf0 R14: 00007fff93439d20 R15: 00007fff9343a080 [ 30.359942] [ 30.360241] [ 30.360464] Allocated by task 213: [ 30.360895] kasan_save_stack+0x22/0x50 [ 30.361412] kasan_set_track+0x25/0x30 [ 30.361921] __kasan_slab_alloc+0x59/0x70 [ 30.362452] kmem_cache_alloc+0x16b/0x370 [ 30.362991] vm_area_dup+0x20/0x160 [ 30.363458] __split_vma+0x170/0x950 [ 30.363923] split_vma+0xc6/0x110 [ 30.364369] mprotect_fixup+0x8d2/0xb30 [ 30.364880] do_mprotect_pkey+0x87e/0xd40 [ 30.365404] __x64_sys_mprotect+0x78/0xc0 [ 30.365930] do_syscall_64+0x3f/0x90 [ 30.366413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.367075] [ 30.367292] Freed by task 213: [ 30.367688] kasan_save_stack+0x22/0x50 [ 30.368197] kasan_set_track+0x25/0x30 [ 30.368704] kasan_save_free_info+0x2b/0x50 [ 30.369247] __kasan_slab_free+0x10a/0x190 [ 30.369785] kmem_cache_free+0x10d/0x4d0 [ 30.370301] rcu_core+0x8c8/0x2860 [ 30.370755] __do_softirq+0x1b7/0x7d4 [ 30.371254] [ 30.371474] Last potentially related work creation: [ 30.372077] kasan_save_stack+0x22/0x50 [ 30.372590] __kasan_record_aux_stack+0x8e/0xa0 [ 30.373172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.373818] remove_vma+0x139/0x170 [ 30.374286] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.374847] do_vmi_munmap+0x1f1/0x2b0 [ 30.375357] __vm_munmap+0x138/0x3a0 [ 30.375829] __x64_sys_munmap+0x59/0x80 [ 30.376338] do_syscall_64+0x3f/0x90 [ 30.376818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377467] [ 30.377685] Second to last potentially related work creation: [ 30.378377] kasan_save_stack+0x22/0x50 [ 30.378882] __kasan_record_aux_stack+0x8e/0xa0 [ 30.379476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.380124] remove_vma+0x139/0x170 [ 30.380591] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.381156] do_vmi_munmap+0x1f1/0x2b0 [ 30.381647] mmap_region+0x1f9/0x2660 [ 30.382138] do_mmap+0x854/0xf00 [ 30.382575] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.383075] ksys_mmap_pgoff+0x3af/0x500 [ 30.383577] do_syscall_64+0x3f/0x90 [ 30.384067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.384729] [ 30.384945] The buggy address belongs to the object at ffff88800ddd9828 [ 30.384945] which belongs to the cache vm_area_struct of size 168 [ 30.386427] The buggy address is located 88 bytes inside of [ 30.386427] freed 168-byte region [ffff88800ddd9828, ffff88800ddd98d0) [ 30.387903] [ 30.388123] The buggy address belongs to the physical page: [ 30.388780] page:000000006e04f907 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddd9 [ 30.389885] memcg:ffff88800ebf7e01 [ 30.390325] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.390998] page_type: 0xffffffff() [ 30.391463] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.392387] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebf7e01 [ 30.393316] page dumped because: kasan: bad access detected [ 30.393990] [ 30.394208] Memory state around the buggy address: [ 30.394795] ffff88800ddd9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.395672] ffff88800ddd9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.396531] >ffff88800ddd9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.397408] ^ [ 30.397814] ffff88800ddd9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.398671] ffff88800ddd9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.399544] ================================================================== [ 30.400869] Disabling lock debugging due to kernel taint [ 32.245067] BUG: Bad rss-counter state mm:00000000f25f11b5 type:MM_FILEPAGES val:33 [ 32.246245] BUG: Bad rss-counter state mm:00000000f25f11b5 type:MM_ANONPAGES val:22 [ 32.617990] BUG: Bad rss-counter state mm:000000005d399cfc type:MM_FILEPAGES val:33 [ 32.619181] BUG: Bad rss-counter state mm:000000005d399cfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3810' (ECDSA) to the list of known hosts. 2023/06/20 17:49:44 fuzzer started 2023/06/20 17:49:45 dialing manager at localhost:36067 2023/06/20 17:49:45 checking machine... 2023/06/20 17:49:45 checking revisions... [ 33.308552] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:49:45 testing simple program... [ 33.365073] cgroup: Unknown subsys name 'net' [ 33.413394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:49:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880184c7e20 RCX=ffffffff844a57aa RDX=ffff88800e3f51c0 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff8880184c7d88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d95701e R13=ffffed1003098fcb R14=0000000000000000 R15=ffff8880184c7e59 RIP=ffffffff814c0408 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7aea747900 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=00007f7aeaae33ec CR3=0000000015904000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f36b9e4cd50 CR3=000000000dc0e000 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=2034343a39343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000