syzkaller login: [ 31.152599] BUG: Bad rss-counter state mm:00000000cffdb61f type:MM_FILEPAGES val:33 [ 31.153983] BUG: Bad rss-counter state mm:00000000cffdb61f type:MM_ANONPAGES val:22 [ 31.273602] ================================================================== [ 31.274782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.276099] Read of size 8 at addr ffff88800e7935c8 by task sshd/219 [ 31.276962] [ 31.277203] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.278171] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.279255] Call Trace: [ 31.279606] [ 31.279924] dump_stack_lvl+0x91/0xf0 [ 31.280492] print_report+0xcc/0x620 [ 31.281030] ? __virt_addr_valid+0x102/0x340 [ 31.281640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283008] kasan_report+0xbe/0xf0 [ 31.283553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.284264] vma_interval_tree_remove+0xc75/0xec0 [ 31.284979] vma_prepare+0xc54/0x11a0 [ 31.285532] __split_vma+0x5af/0x950 [ 31.286071] ? __pfx___split_vma+0x10/0x10 [ 31.286681] ? find_held_lock+0x2c/0x110 [ 31.287275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.287930] ? lock_is_held_type+0x9f/0x120 [ 31.288570] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.289276] ? mtree_range_walk+0x632/0x900 [ 31.289913] ? mas_walk+0x5c7/0x7c0 [ 31.290464] do_vmi_munmap+0x1f1/0x2b0 [ 31.291033] mmap_region+0x1f9/0x2660 [ 31.291592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.292182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.293023] ? __pfx_lock_acquire+0x10/0x10 [ 31.293639] ? __pfx_mmap_region+0x10/0x10 [ 31.294247] ? security_mmap_addr+0x7d/0xa0 [ 31.294859] ? get_unmapped_area+0x1f5/0x3f0 [ 31.295496] do_mmap+0x854/0xf00 [ 31.296004] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.296588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.297229] ksys_mmap_pgoff+0x3af/0x500 [ 31.297814] do_syscall_64+0x3f/0x90 [ 31.298373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299120] RIP: 0033:0x7f4675a31d82 [ 31.299651] 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 [ 31.302124] RSP: 002b:00007fffd522b118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.303169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4675a31d82 [ 31.304141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4674e6b000 [ 31.305120] RBP: 00007f4674e6b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.306101] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556145efcec0 [ 31.307078] R13: 00007fffd522b130 R14: 00007fffd522b160 R15: 00007fffd522b4c0 [ 31.308059] [ 31.308392] [ 31.308637] Allocated by task 212: [ 31.309113] kasan_save_stack+0x22/0x50 [ 31.309676] kasan_set_track+0x25/0x30 [ 31.310234] __kasan_slab_alloc+0x59/0x70 [ 31.310812] kmem_cache_alloc+0x16b/0x370 [ 31.311389] vm_area_dup+0x20/0x160 [ 31.311893] __split_vma+0x170/0x950 [ 31.312439] split_vma+0xc6/0x110 [ 31.312926] mprotect_fixup+0x8d2/0xb30 [ 31.313487] do_mprotect_pkey+0x87e/0xd40 [ 31.314080] __x64_sys_mprotect+0x78/0xc0 [ 31.314668] do_syscall_64+0x3f/0x90 [ 31.315196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315917] [ 31.316160] Freed by task 212: [ 31.316611] kasan_save_stack+0x22/0x50 [ 31.317171] kasan_set_track+0x25/0x30 [ 31.317740] kasan_save_free_info+0x2b/0x50 [ 31.318347] __kasan_slab_free+0x10a/0x190 [ 31.318962] kmem_cache_free+0x10d/0x4d0 [ 31.319552] rcu_core+0x8c8/0x2860 [ 31.320062] __do_softirq+0x1b7/0x7d4 [ 31.320633] [ 31.320885] Last potentially related work creation: [ 31.321562] kasan_save_stack+0x22/0x50 [ 31.322135] __kasan_record_aux_stack+0x8e/0xa0 [ 31.322802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.323541] remove_vma+0x139/0x170 [ 31.324052] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.324709] do_vmi_munmap+0x1f1/0x2b0 [ 31.325269] __vm_munmap+0x138/0x3a0 [ 31.325812] __x64_sys_munmap+0x59/0x80 [ 31.326385] do_syscall_64+0x3f/0x90 [ 31.326936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327679] [ 31.327925] Second to last potentially related work creation: [ 31.328740] kasan_save_stack+0x22/0x50 [ 31.329318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330717] remove_vma+0x139/0x170 [ 31.331233] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331875] do_vmi_munmap+0x1f1/0x2b0 [ 31.332435] __vm_munmap+0x138/0x3a0 [ 31.332976] __x64_sys_munmap+0x59/0x80 [ 31.333547] do_syscall_64+0x3f/0x90 [ 31.334097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334839] [ 31.335085] The buggy address belongs to the object at ffff88800e793570 [ 31.335085] which belongs to the cache vm_area_struct of size 168 [ 31.336787] The buggy address is located 88 bytes inside of [ 31.336787] freed 168-byte region [ffff88800e793570, ffff88800e793618) [ 31.338419] [ 31.338662] The buggy address belongs to the physical page: [ 31.339422] page:000000009b81b2cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe793 [ 31.340685] memcg:ffff88800dbb6c01 [ 31.341183] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.341927] page_type: 0xffffffff() [ 31.342448] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379640 dead000000000006 [ 31.343504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb6c01 [ 31.344553] page dumped because: kasan: bad access detected [ 31.345320] [ 31.345569] Memory state around the buggy address: [ 31.346240] ffff88800e793480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.347226] ffff88800e793500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.348208] >ffff88800e793580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.349210] ^ [ 31.349976] ffff88800e793600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.350969] ffff88800e793680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.351955] ================================================================== [ 31.353532] Disabling lock debugging due to kernel taint [ 33.347273] BUG: Bad rss-counter state mm:0000000083d0f0c0 type:MM_FILEPAGES val:33 [ 33.348340] BUG: Bad rss-counter state mm:0000000083d0f0c0 type:MM_ANONPAGES val:22 [ 33.813015] BUG: Bad rss-counter state mm:00000000b0827067 type:MM_FILEPAGES val:33 [ 33.814140] BUG: Bad rss-counter state mm:00000000b0827067 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10144' (ECDSA) to the list of known hosts. 2023/06/20 14:11:32 fuzzer started 2023/06/20 14:11:33 dialing manager at localhost:36067 2023/06/20 14:11:33 checking machine... 2023/06/20 14:11:33 checking revisions... [ 34.466553] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:11:33 testing simple program... [ 34.517819] cgroup: Unknown subsys name 'net' [ 34.560981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:32 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800d898000 RSI=ffffffff84498d0d RDI=0000000000000001 RBP=0000000000000002 RSP=ffff88800e2975c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800e297708 R13=00007f4fe3990fff R14=ffff88800d7f8600 R15=0000000000000001 RIP=ffffffff814c086b 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 00007f4fe39cc900 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=00007f4fe3996008 CR3=000000001cc80000 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=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=00007f2bf726ea60 CR3=0000000018cfc000 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=2032333a31313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a31313a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000