syzkaller login: [ 30.481788] BUG: Bad rss-counter state mm:00000000ade6dd6e type:MM_FILEPAGES val:33 [ 30.482535] BUG: Bad rss-counter state mm:00000000ade6dd6e type:MM_ANONPAGES val:22 [ 30.610591] ================================================================== [ 30.611348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.612047] Read of size 8 at addr ffff8880098116b0 by task sshd/219 [ 30.612544] [ 30.612687] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.613259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.613902] Call Trace: [ 30.614124] [ 30.614308] dump_stack_lvl+0x91/0xf0 [ 30.614628] print_report+0xcc/0x620 [ 30.614945] ? __virt_addr_valid+0x102/0x340 [ 30.615572] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.615984] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.616384] kasan_report+0xbe/0xf0 [ 30.616688] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617097] vma_interval_tree_remove+0xc75/0xec0 [ 30.617519] vma_prepare+0xc54/0x11a0 [ 30.617844] __split_vma+0x5af/0x950 [ 30.618170] ? __pfx___split_vma+0x10/0x10 [ 30.618502] ? find_held_lock+0x2c/0x110 [ 30.618839] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.619198] ? lock_is_held_type+0x9f/0x120 [ 30.619614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.620045] ? mtree_range_walk+0x632/0x900 [ 30.620409] ? mas_walk+0x5c7/0x7c0 [ 30.620707] do_vmi_munmap+0x1f1/0x2b0 [ 30.621026] mmap_region+0x1f9/0x2660 [ 30.621328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.621656] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.622117] ? __pfx_lock_acquire+0x10/0x10 [ 30.622451] ? __pfx_mmap_region+0x10/0x10 [ 30.622808] ? security_mmap_addr+0x7d/0xa0 [ 30.623180] ? get_unmapped_area+0x1f5/0x3f0 [ 30.623546] do_mmap+0x854/0xf00 [ 30.623822] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.624127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.624474] ksys_mmap_pgoff+0x3af/0x500 [ 30.624821] do_syscall_64+0x3f/0x90 [ 30.625177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.625613] RIP: 0033:0x7fbf81f0cd82 [ 30.625929] 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 [ 30.627445] RSP: 002b:00007ffe09511028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.628078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf81f0cd82 [ 30.628677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf81346000 [ 30.629243] RBP: 00007fbf81346000 R08: 0000000000000009 R09: 0000000000001000 [ 30.629829] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca2333ed90 [ 30.630404] R13: 00007ffe09511040 R14: 00007ffe09511070 R15: 00007ffe095113d0 [ 30.630966] [ 30.631156] [ 30.631294] Allocated by task 212: [ 30.631675] kasan_save_stack+0x22/0x50 [ 30.632033] kasan_set_track+0x25/0x30 [ 30.632370] __kasan_slab_alloc+0x59/0x70 [ 30.632730] kmem_cache_alloc+0x16b/0x370 [ 30.633094] vm_area_dup+0x20/0x160 [ 30.633406] __split_vma+0x170/0x950 [ 30.633699] split_vma+0xc6/0x110 [ 30.633974] mprotect_fixup+0x8d2/0xb30 [ 30.634282] do_mprotect_pkey+0x87e/0xd40 [ 30.634644] __x64_sys_mprotect+0x78/0xc0 [ 30.635026] do_syscall_64+0x3f/0x90 [ 30.635364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635839] [ 30.635980] Freed by task 212: [ 30.636254] kasan_save_stack+0x22/0x50 [ 30.636608] kasan_set_track+0x25/0x30 [ 30.636952] kasan_save_free_info+0x2b/0x50 [ 30.637310] __kasan_slab_free+0x10a/0x190 [ 30.637671] kmem_cache_free+0x10d/0x4d0 [ 30.638032] rcu_core+0x8c8/0x2860 [ 30.638343] __do_softirq+0x1b7/0x7d4 [ 30.638675] [ 30.638825] Last potentially related work creation: [ 30.639238] kasan_save_stack+0x22/0x50 [ 30.639622] __kasan_record_aux_stack+0x8e/0xa0 [ 30.640016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.640449] remove_vma+0x139/0x170 [ 30.640760] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.641148] do_vmi_munmap+0x1f1/0x2b0 [ 30.641472] __vm_munmap+0x138/0x3a0 [ 30.641769] __x64_sys_munmap+0x59/0x80 [ 30.642081] do_syscall_64+0x3f/0x90 [ 30.642382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642790] [ 30.642931] The buggy address belongs to the object at ffff888009811658 [ 30.642931] which belongs to the cache vm_area_struct of size 168 [ 30.643978] The buggy address is located 88 bytes inside of [ 30.643978] freed 168-byte region [ffff888009811658, ffff888009811700) [ 30.644956] [ 30.645109] The buggy address belongs to the physical page: [ 30.645562] page:0000000002bfec4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9811 [ 30.646413] memcg:ffff88800d2e1701 [ 30.646772] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.647257] page_type: 0xffffffff() [ 30.647581] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a20c0 dead000000000007 [ 30.648192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e1701 [ 30.648843] page dumped because: kasan: bad access detected [ 30.649374] [ 30.649551] Memory state around the buggy address: [ 30.649957] ffff888009811580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.650552] ffff888009811600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.651152] >ffff888009811680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.651852] ^ [ 30.652266] ffff888009811700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.652867] ffff888009811780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.653513] ================================================================== [ 30.654296] Disabling lock debugging due to kernel taint [ 32.395376] BUG: Bad rss-counter state mm:00000000a2eeef4f type:MM_FILEPAGES val:33 [ 32.396167] BUG: Bad rss-counter state mm:00000000a2eeef4f type:MM_ANONPAGES val:22 [ 32.764951] BUG: Bad rss-counter state mm:000000008f3f0f73 type:MM_FILEPAGES val:33 [ 32.765828] BUG: Bad rss-counter state mm:000000008f3f0f73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11504' (ECDSA) to the list of known hosts. 2023/06/21 09:00:14 fuzzer started 2023/06/21 09:00:14 dialing manager at localhost:36067 2023/06/21 09:00:14 checking machine... 2023/06/21 09:00:14 checking revisions... [ 33.365489] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:00:14 testing simple program... [ 33.402729] cgroup: Unknown subsys name 'net' [ 33.435706] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:00:14 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=00007f3477fd6be0 CR3=000000000cab2000 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=2034313a30303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a30303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888008e37bf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000246 R13=ffff888016b101d0 R14=ffff88806cf35000 R15=ffff888016b106c0 RIP=ffffffff8180f189 RFL=00000046 [---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 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=00007febc3038008 CR3=000000000e91e000 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