syzkaller login: [ 36.482848] BUG: Bad rss-counter state mm:000000008e46e4a1 type:MM_FILEPAGES val:33 [ 36.484099] BUG: Bad rss-counter state mm:000000008e46e4a1 type:MM_ANONPAGES val:22 [ 36.645428] ================================================================== [ 36.646351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.647307] Read of size 8 at addr ffff88800e7c3ed8 by task sshd/226 [ 36.648091] [ 36.648313] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.649244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.650221] Call Trace: [ 36.650562] [ 36.650857] dump_stack_lvl+0x91/0xf0 [ 36.651359] print_report+0xcc/0x620 [ 36.651844] ? __virt_addr_valid+0x102/0x340 [ 36.652399] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.653013] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.653633] kasan_report+0xbe/0xf0 [ 36.654116] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.654745] vma_interval_tree_remove+0xc75/0xec0 [ 36.655360] vma_prepare+0xc54/0x11a0 [ 36.655847] __split_vma+0x5af/0x950 [ 36.656325] ? __pfx___split_vma+0x10/0x10 [ 36.656857] ? find_held_lock+0x2c/0x110 [ 36.657384] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.657948] ? lock_is_held_type+0x9f/0x120 [ 36.658498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.659139] ? mtree_range_walk+0x632/0x900 [ 36.659695] ? mas_walk+0x5c7/0x7c0 [ 36.660178] do_vmi_munmap+0x1f1/0x2b0 [ 36.660675] mmap_region+0x1f9/0x2660 [ 36.661163] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.661670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.662387] ? __pfx_lock_acquire+0x10/0x10 [ 36.662928] ? __pfx_mmap_region+0x10/0x10 [ 36.663464] ? security_mmap_addr+0x7d/0xa0 [ 36.664000] ? get_unmapped_area+0x1f5/0x3f0 [ 36.664557] do_mmap+0x854/0xf00 [ 36.665006] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.665507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.666074] ksys_mmap_pgoff+0x3af/0x500 [ 36.666578] do_syscall_64+0x3f/0x90 [ 36.667064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.667744] RIP: 0033:0x7eff3f376d82 [ 36.668210] 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 [ 36.670350] RSP: 002b:00007ffe6173eac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.671259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff3f376d82 [ 36.672099] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff3e7b0000 [ 36.672942] RBP: 00007eff3e7b0000 R08: 0000000000000009 R09: 0000000000001000 [ 36.673792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d24375ec0 [ 36.674645] R13: 00007ffe6173eae0 R14: 00007ffe6173eb10 R15: 00007ffe6173ee70 [ 36.675509] [ 36.675805] [ 36.676020] Allocated by task 219: [ 36.676458] kasan_save_stack+0x22/0x50 [ 36.676963] kasan_set_track+0x25/0x30 [ 36.677460] __kasan_slab_alloc+0x59/0x70 [ 36.677981] kmem_cache_alloc+0x16b/0x370 [ 36.678500] vm_area_dup+0x20/0x160 [ 36.678960] __split_vma+0x170/0x950 [ 36.679453] split_vma+0xc6/0x110 [ 36.679900] mprotect_fixup+0x8d2/0xb30 [ 36.680409] do_mprotect_pkey+0x87e/0xd40 [ 36.680933] __x64_sys_mprotect+0x78/0xc0 [ 36.681459] do_syscall_64+0x3f/0x90 [ 36.681932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.682573] [ 36.682797] Freed by task 219: [ 36.683197] kasan_save_stack+0x22/0x50 [ 36.683704] kasan_set_track+0x25/0x30 [ 36.684199] kasan_save_free_info+0x2b/0x50 [ 36.684726] __kasan_slab_free+0x10a/0x190 [ 36.685262] kmem_cache_free+0x10d/0x4d0 [ 36.685770] rcu_core+0x8c8/0x2860 [ 36.686215] __do_softirq+0x1b7/0x7d4 [ 36.686689] [ 36.686905] Last potentially related work creation: [ 36.687505] kasan_save_stack+0x22/0x50 [ 36.688018] __kasan_record_aux_stack+0x8e/0xa0 [ 36.688603] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.689248] remove_vma+0x139/0x170 [ 36.689702] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.690263] do_vmi_munmap+0x1f1/0x2b0 [ 36.690753] __vm_munmap+0x138/0x3a0 [ 36.691227] __x64_sys_munmap+0x59/0x80 [ 36.691736] do_syscall_64+0x3f/0x90 [ 36.692222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.692883] [ 36.693099] Second to last potentially related work creation: [ 36.693776] kasan_save_stack+0x22/0x50 [ 36.694291] __kasan_record_aux_stack+0x8e/0xa0 [ 36.694860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.695538] remove_vma+0x139/0x170 [ 36.695995] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.696552] do_vmi_munmap+0x1f1/0x2b0 [ 36.697036] mmap_region+0x1f9/0x2660 [ 36.697509] do_mmap+0x854/0xf00 [ 36.697953] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.698437] ksys_mmap_pgoff+0x3af/0x500 [ 36.698941] do_syscall_64+0x3f/0x90 [ 36.699425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.700062] [ 36.700276] The buggy address belongs to the object at ffff88800e7c3e80 [ 36.700276] which belongs to the cache vm_area_struct of size 168 [ 36.701742] The buggy address is located 88 bytes inside of [ 36.701742] freed 168-byte region [ffff88800e7c3e80, ffff88800e7c3f28) [ 36.703157] [ 36.703374] The buggy address belongs to the physical page: [ 36.704028] page:00000000e0496376 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7c3 [ 36.705110] memcg:ffff88800ebd0101 [ 36.705530] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.706218] page_type: 0xffffffff() [ 36.706664] raw: 0100000000000200 ffff8880087a0c80 ffffea0000398780 dead000000000003 [ 36.707581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebd0101 [ 36.708494] page dumped because: kasan: bad access detected [ 36.709164] [ 36.709379] Memory state around the buggy address: [ 36.709951] ffff88800e7c3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.710802] ffff88800e7c3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.711679] >ffff88800e7c3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.712525] ^ [ 36.713249] ffff88800e7c3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.714103] ffff88800e7c3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.714949] ================================================================== [ 36.715927] Disabling lock debugging due to kernel taint [ 38.949969] BUG: Bad rss-counter state mm:0000000047246347 type:MM_FILEPAGES val:33 [ 38.950920] BUG: Bad rss-counter state mm:0000000047246347 type:MM_ANONPAGES val:22 [ 39.450738] BUG: Bad rss-counter state mm:00000000d53bcdbc type:MM_FILEPAGES val:33 [ 39.452006] BUG: Bad rss-counter state mm:00000000d53bcdbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39712' (ECDSA) to the list of known hosts. 2023/06/20 23:20:07 fuzzer started 2023/06/20 23:20:07 dialing manager at localhost:36067 2023/06/20 23:20:07 checking machine... 2023/06/20 23:20:07 checking revisions... [ 40.167376] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:20:07 testing simple program... [ 40.219995] cgroup: Unknown subsys name 'net' [ 40.260339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:20:07 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=00007ffe1d42afc8 CR3=0000000005482000 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=00007f686cd44510000055cadb2db790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff815ab150 RBX=ffff88800c971000 RCX=0000000000000000 RDX=ffff888015ac51c0 RSI=ffffffff814d4619 RDI=ffffc90000655030 RBP=000000007fff0000 RSP=ffff88801580fde8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff88801580fe30 R15=ffffc90000655000 RIP=ffffffff814d4633 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 00007fc9af3f5900 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=00007f024e3ea650 CR3=000000000c474000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=00adf9b52d52709300000000000ae988 XMM05=e376efca6d01e0780000000000133a70 XMM06=13e856d8d71426c800000000001324f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000