syzkaller login: [ 38.691346] BUG: Bad rss-counter state mm:0000000004c98981 type:MM_FILEPAGES val:33 [ 38.693993] BUG: Bad rss-counter state mm:0000000004c98981 type:MM_ANONPAGES val:22 [ 38.877310] ================================================================== [ 38.878518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.879878] Read of size 8 at addr ffff8880168fc6b0 by task sshd/223 [ 38.880902] [ 38.881188] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.882368] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.883449] Call Trace: [ 38.883797] [ 38.884104] dump_stack_lvl+0x91/0xf0 [ 38.884637] print_report+0xcc/0x620 [ 38.885160] ? __virt_addr_valid+0x102/0x340 [ 38.885756] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886432] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887113] kasan_report+0xbe/0xf0 [ 38.887636] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888314] vma_interval_tree_remove+0xc75/0xec0 [ 38.888970] vma_prepare+0xc54/0x11a0 [ 38.889496] __split_vma+0x5af/0x950 [ 38.890013] ? __pfx___split_vma+0x10/0x10 [ 38.890591] ? find_held_lock+0x2c/0x110 [ 38.891179] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.891791] ? lock_is_held_type+0x9f/0x120 [ 38.892379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893034] ? mtree_range_walk+0x632/0x900 [ 38.893631] ? mas_walk+0x5c7/0x7c0 [ 38.894145] do_vmi_munmap+0x1f1/0x2b0 [ 38.894675] mmap_region+0x1f9/0x2660 [ 38.895204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.895768] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.896563] ? __pfx_lock_acquire+0x10/0x10 [ 38.897163] ? __pfx_mmap_region+0x10/0x10 [ 38.897752] ? security_mmap_addr+0x7d/0xa0 [ 38.898341] ? get_unmapped_area+0x1f5/0x3f0 [ 38.898952] do_mmap+0x854/0xf00 [ 38.899434] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.899974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900591] ksys_mmap_pgoff+0x3af/0x500 [ 38.901153] do_syscall_64+0x3f/0x90 [ 38.901684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902395] RIP: 0033:0x7f2c374ead82 [ 38.902898] 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 [ 38.905219] RSP: 002b:00007ffed9e9cbf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c374ead82 [ 38.907140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c36924000 [ 38.908072] RBP: 00007f2c36924000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909003] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5012a5d90 [ 38.909930] R13: 00007ffed9e9cc10 R14: 00007ffed9e9cc40 R15: 00007ffed9e9cfa0 [ 38.910892] [ 38.911208] [ 38.911443] Allocated by task 216: [ 38.911908] kasan_save_stack+0x22/0x50 [ 38.912465] kasan_set_track+0x25/0x30 [ 38.913007] __kasan_slab_alloc+0x59/0x70 [ 38.913586] kmem_cache_alloc+0x16b/0x370 [ 38.914152] vm_area_dup+0x20/0x160 [ 38.914651] __split_vma+0x170/0x950 [ 38.915169] split_vma+0xc6/0x110 [ 38.915656] mprotect_fixup+0x8d2/0xb30 [ 38.916210] do_mprotect_pkey+0x87e/0xd40 [ 38.916774] __x64_sys_mprotect+0x78/0xc0 [ 38.917348] do_syscall_64+0x3f/0x90 [ 38.917884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918616] [ 38.918873] Freed by task 216: [ 38.919323] kasan_save_stack+0x22/0x50 [ 38.919899] kasan_set_track+0x25/0x30 [ 38.920464] kasan_save_free_info+0x2b/0x50 [ 38.921077] __kasan_slab_free+0x10a/0x190 [ 38.921690] kmem_cache_free+0x10d/0x4d0 [ 38.922278] rcu_core+0x8c8/0x2860 [ 38.922785] __do_softirq+0x1b7/0x7d4 [ 38.923362] [ 38.923614] Last potentially related work creation: [ 38.924282] kasan_save_stack+0x22/0x50 [ 38.924858] __kasan_record_aux_stack+0x8e/0xa0 [ 38.925516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.926254] remove_vma+0x139/0x170 [ 38.926770] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.927419] do_vmi_munmap+0x1f1/0x2b0 [ 38.927975] __vm_munmap+0x138/0x3a0 [ 38.928522] __x64_sys_munmap+0x59/0x80 [ 38.929098] do_syscall_64+0x3f/0x90 [ 38.929643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930377] [ 38.930623] The buggy address belongs to the object at ffff8880168fc658 [ 38.930623] which belongs to the cache vm_area_struct of size 168 [ 38.932313] The buggy address is located 88 bytes inside of [ 38.932313] freed 168-byte region [ffff8880168fc658, ffff8880168fc700) [ 38.933925] [ 38.934172] The buggy address belongs to the physical page: [ 38.934950] page:000000007d9ecf64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168fc [ 38.936204] memcg:ffff88801597df01 [ 38.936690] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.937431] page_type: 0xffffffff() [ 38.937948] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.939010] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801597df01 [ 38.940051] page dumped because: kasan: bad access detected [ 38.940803] [ 38.941050] Memory state around the buggy address: [ 38.941706] ffff8880168fc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.942675] ffff8880168fc600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.943670] >ffff8880168fc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944637] ^ [ 38.945296] ffff8880168fc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.946270] ffff8880168fc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.947258] ================================================================== [ 38.948416] Disabling lock debugging due to kernel taint [ 40.824120] BUG: Bad rss-counter state mm:00000000dad739b5 type:MM_FILEPAGES val:33 [ 40.825355] BUG: Bad rss-counter state mm:00000000dad739b5 type:MM_ANONPAGES val:22 [ 41.199172] BUG: Bad rss-counter state mm:00000000d219e5ce type:MM_FILEPAGES val:33 [ 41.200320] BUG: Bad rss-counter state mm:00000000d219e5ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61555' (ECDSA) to the list of known hosts. 2023/06/21 03:33:11 fuzzer started 2023/06/21 03:33:11 dialing manager at localhost:36067 2023/06/21 03:33:12 checking machine... 2023/06/21 03:33:12 checking revisions... [ 41.938966] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:33:12 testing simple program... [ 41.987682] cgroup: Unknown subsys name 'net' [ 42.098214] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:11 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=ffff888008c04000 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=00007f6c4de10000 CR3=0000000015d1c000 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=2031313a33333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a33333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015a207c0 RBX=ffff88800e5c5b8c RCX=1ffff11001cb8b5e RDX=ffff888015a207c0 RSI=ffff888015a207c0 RDI=ffff88800e5c5b8c RBP=0000000000000100 RSP=ffff888016cd7348 R8 =0000000000000001 R9 =ffff88800e5c5b8c R10=ffff88800e5c5b43 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e5c5b9c R14=ffff88800e5c5b8c R15=ffff88800e5c5ab0 RIP=ffffffff844d8b5f RFL=00000202 [-------] 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 00007fd3f872b900 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=00007fd3f870a020 CR3=000000000efc0000 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