syzkaller login: [ 31.239540] BUG: Bad rss-counter state mm:000000004befc4db type:MM_FILEPAGES val:33 [ 31.240864] BUG: Bad rss-counter state mm:000000004befc4db type:MM_ANONPAGES val:22 [ 31.282570] ================================================================== [ 31.283563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.284624] Read of size 8 at addr ffff88800fc08d08 by task sshd/221 [ 31.285449] [ 31.285676] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.286630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.287687] Call Trace: [ 31.288029] [ 31.288318] dump_stack_lvl+0x91/0xf0 [ 31.288817] print_report+0xcc/0x620 [ 31.289315] ? __virt_addr_valid+0x102/0x340 [ 31.289875] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290520] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291152] kasan_report+0xbe/0xf0 [ 31.291638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292276] vma_interval_tree_remove+0xc75/0xec0 [ 31.292899] vma_prepare+0xc54/0x11a0 [ 31.293405] __split_vma+0x5af/0x950 [ 31.293885] ? __pfx___split_vma+0x10/0x10 [ 31.294460] ? find_held_lock+0x2c/0x110 [ 31.294989] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.295568] ? lock_is_held_type+0x9f/0x120 [ 31.296114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.296737] ? mtree_range_walk+0x632/0x900 [ 31.297300] ? mas_walk+0x5c7/0x7c0 [ 31.297781] do_vmi_munmap+0x1f1/0x2b0 [ 31.298286] mmap_region+0x1f9/0x2660 [ 31.298771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.299290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.300003] ? __pfx_lock_acquire+0x10/0x10 [ 31.300539] ? __pfx_mmap_region+0x10/0x10 [ 31.301076] ? security_mmap_addr+0x7d/0xa0 [ 31.301615] ? get_unmapped_area+0x1f5/0x3f0 [ 31.302177] do_mmap+0x854/0xf00 [ 31.302623] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.303124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.303699] ksys_mmap_pgoff+0x3af/0x500 [ 31.304217] do_syscall_64+0x3f/0x90 [ 31.304697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305349] RIP: 0033:0x7ff581025d82 [ 31.305805] 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 [ 31.307970] RSP: 002b:00007ffe7208f308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.308886] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff581025d82 [ 31.309747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff58045f000 [ 31.310605] RBP: 00007ff58045f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.311459] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557dbd350d90 [ 31.312309] R13: 00007ffe7208f320 R14: 00007ffe7208f350 R15: 00007ffe7208f6b0 [ 31.313174] [ 31.313467] [ 31.313681] Allocated by task 214: [ 31.314107] kasan_save_stack+0x22/0x50 [ 31.314629] kasan_set_track+0x25/0x30 [ 31.315120] __kasan_slab_alloc+0x59/0x70 [ 31.315642] kmem_cache_alloc+0x16b/0x370 [ 31.316163] vm_area_dup+0x20/0x160 [ 31.316619] __split_vma+0x170/0x950 [ 31.317089] split_vma+0xc6/0x110 [ 31.317526] mprotect_fixup+0x8d2/0xb30 [ 31.318028] do_mprotect_pkey+0x87e/0xd40 [ 31.318548] __x64_sys_mprotect+0x78/0xc0 [ 31.319076] do_syscall_64+0x3f/0x90 [ 31.319558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320199] [ 31.320414] Freed by task 214: [ 31.320801] kasan_save_stack+0x22/0x50 [ 31.321301] kasan_set_track+0x25/0x30 [ 31.321788] kasan_save_free_info+0x2b/0x50 [ 31.322325] __kasan_slab_free+0x10a/0x190 [ 31.322857] kmem_cache_free+0x10d/0x4d0 [ 31.323361] rcu_core+0x8c8/0x2860 [ 31.323965] __do_softirq+0x1b7/0x7d4 [ 31.324457] [ 31.324677] Last potentially related work creation: [ 31.325303] kasan_save_stack+0x22/0x50 [ 31.325826] __kasan_record_aux_stack+0x8e/0xa0 [ 31.326452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.327135] remove_vma+0x139/0x170 [ 31.327618] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.328209] do_vmi_munmap+0x1f1/0x2b0 [ 31.328793] __vm_munmap+0x138/0x3a0 [ 31.329378] __x64_sys_munmap+0x59/0x80 [ 31.330001] do_syscall_64+0x3f/0x90 [ 31.330608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.331405] [ 31.331670] The buggy address belongs to the object at ffff88800fc08cb0 [ 31.331670] which belongs to the cache vm_area_struct of size 168 [ 31.333555] The buggy address is located 88 bytes inside of [ 31.333555] freed 168-byte region [ffff88800fc08cb0, ffff88800fc08d58) [ 31.335209] [ 31.335462] The buggy address belongs to the physical page: [ 31.336244] page:00000000c7483b90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc08 [ 31.337508] memcg:ffff88800fc09001 [ 31.338014] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.338774] page_type: 0xffffffff() [ 31.339303] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.340384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc09001 [ 31.341444] page dumped because: kasan: bad access detected [ 31.342264] [ 31.342513] Memory state around the buggy address: [ 31.343195] ffff88800fc08c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.344195] ffff88800fc08c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.345191] >ffff88800fc08d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.346187] ^ [ 31.346697] ffff88800fc08d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.347686] ffff88800fc08e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.348661] ================================================================== [ 31.349966] Disabling lock debugging due to kernel taint [ 34.035396] BUG: Bad rss-counter state mm:00000000396cb3b7 type:MM_FILEPAGES val:33 [ 34.037021] BUG: Bad rss-counter state mm:00000000396cb3b7 type:MM_ANONPAGES val:22 [ 34.493719] BUG: Bad rss-counter state mm:000000004740d086 type:MM_FILEPAGES val:33 [ 34.494592] BUG: Bad rss-counter state mm:000000004740d086 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55940' (ECDSA) to the list of known hosts. 2023/06/20 12:10:57 fuzzer started 2023/06/20 12:10:57 dialing manager at localhost:36067 2023/06/20 12:10:57 checking machine... 2023/06/20 12:10:57 checking revisions... [ 35.197916] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:10:58 testing simple program... [ 35.247849] cgroup: Unknown subsys name 'net' [ 35.296620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8078a55510 CR3=000000000e1d2000 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=2037353a30313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a30313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000001 RDX=1ffff1100d9e1350 RSI=ffff88801604fe18 RDI=ffff88806cf09a80 RBP=ffff88801604fe18 RSP=ffff88806cf099d0 R8 =ffffffff8612974c R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000001e45f R12=0000000000000008 R13=ffff88806cf09ac0 R14=ffff88801604fe20 R15=ffff88806cf09a78 RIP=ffffffff81130445 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 00007f8140c2e900 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=00007f8140bf8008 CR3=000000000f6d0000 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=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