syzkaller login: [ 31.779581] BUG: Bad rss-counter state mm:00000000276ba064 type:MM_FILEPAGES val:33 [ 31.780809] BUG: Bad rss-counter state mm:00000000276ba064 type:MM_ANONPAGES val:22 [ 31.932692] ================================================================== [ 31.933647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.934589] Read of size 8 at addr ffff88800e94fed8 by task sshd/221 [ 31.935370] [ 31.935648] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.936677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.937679] Call Trace: [ 31.938014] [ 31.938322] dump_stack_lvl+0x91/0xf0 [ 31.938836] print_report+0xcc/0x620 [ 31.939342] ? __virt_addr_valid+0x102/0x340 [ 31.939903] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.940590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.941218] kasan_report+0xbe/0xf0 [ 31.941730] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.942386] vma_interval_tree_remove+0xc75/0xec0 [ 31.942993] vma_prepare+0xc54/0x11a0 [ 31.943493] __split_vma+0x5af/0x950 [ 31.943973] ? __pfx___split_vma+0x10/0x10 [ 31.944548] ? find_held_lock+0x2c/0x110 [ 31.945075] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.945663] ? lock_is_held_type+0x9f/0x120 [ 31.946212] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.946862] ? mtree_range_walk+0x632/0x900 [ 31.947434] ? mas_walk+0x5c7/0x7c0 [ 31.947909] do_vmi_munmap+0x1f1/0x2b0 [ 31.948464] mmap_region+0x1f9/0x2660 [ 31.948957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.949494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.950218] ? __pfx_lock_acquire+0x10/0x10 [ 31.950771] ? __pfx_mmap_region+0x10/0x10 [ 31.951323] ? security_mmap_addr+0x7d/0xa0 [ 31.951861] ? get_unmapped_area+0x1f5/0x3f0 [ 31.952465] do_mmap+0x854/0xf00 [ 31.952912] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.953433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.954001] ksys_mmap_pgoff+0x3af/0x500 [ 31.954536] do_syscall_64+0x3f/0x90 [ 31.955015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.955689] RIP: 0033:0x7f1e93c93d82 [ 31.956152] 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 [ 31.958386] RSP: 002b:00007ffd433ec768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.959316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e93c93d82 [ 31.960190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e930cd000 [ 31.961185] RBP: 00007f1e930cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.962052] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4da0b1ec0 [ 31.962928] R13: 00007ffd433ec780 R14: 00007ffd433ec7b0 R15: 00007ffd433ecb10 [ 31.963796] [ 31.964086] [ 31.964327] Allocated by task 214: [ 31.964769] kasan_save_stack+0x22/0x50 [ 31.965291] kasan_set_track+0x25/0x30 [ 31.965797] __kasan_slab_alloc+0x59/0x70 [ 31.966341] kmem_cache_alloc+0x16b/0x370 [ 31.966861] vm_area_dup+0x20/0x160 [ 31.967335] __split_vma+0x170/0x950 [ 31.967816] split_vma+0xc6/0x110 [ 31.968297] mprotect_fixup+0x8d2/0xb30 [ 31.968845] do_mprotect_pkey+0x87e/0xd40 [ 31.969391] __x64_sys_mprotect+0x78/0xc0 [ 31.969926] do_syscall_64+0x3f/0x90 [ 31.970420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.971083] [ 31.971315] Freed by task 214: [ 31.971709] kasan_save_stack+0x22/0x50 [ 31.972221] kasan_set_track+0x25/0x30 [ 31.972769] kasan_save_free_info+0x2b/0x50 [ 31.973328] __kasan_slab_free+0x10a/0x190 [ 31.973874] kmem_cache_free+0x10d/0x4d0 [ 31.974407] rcu_core+0x8c8/0x2860 [ 31.974859] __do_softirq+0x1b7/0x7d4 [ 31.975347] [ 31.975567] Last potentially related work creation: [ 31.976185] kasan_save_stack+0x22/0x50 [ 31.976786] __kasan_record_aux_stack+0x8e/0xa0 [ 31.977390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.978052] remove_vma+0x139/0x170 [ 31.978534] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.979097] do_vmi_munmap+0x1f1/0x2b0 [ 31.979609] __vm_munmap+0x138/0x3a0 [ 31.980092] __x64_sys_munmap+0x59/0x80 [ 31.980637] do_syscall_64+0x3f/0x90 [ 31.981122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.981792] [ 31.982007] Second to last potentially related work creation: [ 31.982728] kasan_save_stack+0x22/0x50 [ 31.983257] __kasan_record_aux_stack+0x8e/0xa0 [ 31.983844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.984545] remove_vma+0x139/0x170 [ 31.985008] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.985589] do_vmi_munmap+0x1f1/0x2b0 [ 31.986087] mmap_region+0x1f9/0x2660 [ 31.986589] do_mmap+0x854/0xf00 [ 31.987027] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.987542] ksys_mmap_pgoff+0x3af/0x500 [ 31.988052] do_syscall_64+0x3f/0x90 [ 31.988581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989245] [ 31.989473] The buggy address belongs to the object at ffff88800e94fe80 [ 31.989473] which belongs to the cache vm_area_struct of size 168 [ 31.991007] The buggy address is located 88 bytes inside of [ 31.991007] freed 168-byte region [ffff88800e94fe80, ffff88800e94ff28) [ 31.992475] [ 31.992708] The buggy address belongs to the physical page: [ 31.993389] page:00000000d3c3416f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe94f [ 31.994507] memcg:ffff88800e460901 [ 31.994943] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.995681] page_type: 0xffffffff() [ 31.996141] raw: 0100000000000200 ffff88800879fc80 ffffea00003abb40 dead000000000005 [ 31.997113] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e460901 [ 31.998059] page dumped because: kasan: bad access detected [ 31.998756] [ 31.998983] Memory state around the buggy address: [ 31.999601] ffff88800e94fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.000501] ffff88800e94fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.001383] >ffff88800e94fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.002265] ^ [ 32.003006] ffff88800e94ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.003902] ffff88800e94ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.004831] ================================================================== [ 32.005997] Disabling lock debugging due to kernel taint [ 33.924670] BUG: Bad rss-counter state mm:00000000873a19bb type:MM_FILEPAGES val:33 [ 33.925838] BUG: Bad rss-counter state mm:00000000873a19bb type:MM_ANONPAGES val:22 [ 34.297136] BUG: Bad rss-counter state mm:00000000e9f2040a type:MM_FILEPAGES val:33 [ 34.298141] BUG: Bad rss-counter state mm:00000000e9f2040a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33209' (ECDSA) to the list of known hosts. 2023/06/20 01:54:33 fuzzer started 2023/06/20 01:54:33 dialing manager at localhost:44161 2023/06/20 01:54:33 checking machine... 2023/06/20 01:54:33 checking revisions... [ 35.001951] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:54:33 testing simple program... [ 35.046754] cgroup: Unknown subsys name 'net' [ 35.090115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:54:31 Registers: info registers vcpu 0 RAX=0000000080000201 RBX=ffff88800e636000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888019d8f9d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800e636098 R13=00000000000000e6 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f45b8412900 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=00007ffe9dbcc000 CR3=0000000016ae8000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffb41ecac80 CR3=000000001017e000 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=2032333a34353a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34353a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000