syzkaller login: [ 34.492131] BUG: Bad rss-counter state mm:0000000090963de7 type:MM_FILEPAGES val:33 [ 34.492968] BUG: Bad rss-counter state mm:0000000090963de7 type:MM_ANONPAGES val:22 [ 34.589947] ================================================================== [ 34.590660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.591392] Read of size 8 at addr ffff88800f451310 by task sshd/220 [ 34.591993] [ 34.592158] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.592908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.593683] Call Trace: [ 34.593927] <TASK> [ 34.594172] dump_stack_lvl+0x91/0xf0 [ 34.594777] print_report+0xcc/0x620 [ 34.595180] ? __virt_addr_valid+0x102/0x340 [ 34.595636] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.596134] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.596647] kasan_report+0xbe/0xf0 [ 34.597029] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.597514] vma_interval_tree_remove+0xc75/0xec0 [ 34.597993] vma_prepare+0xc54/0x11a0 [ 34.598383] __split_vma+0x5af/0x950 [ 34.598756] ? __pfx___split_vma+0x10/0x10 [ 34.599172] ? find_held_lock+0x2c/0x110 [ 34.599607] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.600070] ? lock_is_held_type+0x9f/0x120 [ 34.600527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.601029] ? mtree_range_walk+0x632/0x900 [ 34.601401] ? mas_walk+0x5c7/0x7c0 [ 34.601655] do_vmi_munmap+0x1f1/0x2b0 [ 34.601921] mmap_region+0x1f9/0x2660 [ 34.602181] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.602469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.602853] ? __pfx_lock_acquire+0x10/0x10 [ 34.603140] ? __pfx_mmap_region+0x10/0x10 [ 34.603440] ? security_mmap_addr+0x7d/0xa0 [ 34.603733] ? get_unmapped_area+0x1f5/0x3f0 [ 34.604028] do_mmap+0x854/0xf00 [ 34.604265] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.604540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.604850] ksys_mmap_pgoff+0x3af/0x500 [ 34.605125] do_syscall_64+0x3f/0x90 [ 34.605402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.605751] RIP: 0033:0x7fb9e0dcad82 [ 34.605998] 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 [ 34.607265] RSP: 002b:00007ffeb94bd598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.607804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9e0dcad82 [ 34.608314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9e0204000 [ 34.608815] RBP: 00007fb9e0204000 R08: 0000000000000009 R09: 0000000000001000 [ 34.609291] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634cdd97b20 [ 34.609784] R13: 00007ffeb94bd5b0 R14: 00007ffeb94bd5e0 R15: 00007ffeb94bd940 [ 34.610264] </TASK> [ 34.610439] [ 34.610564] Allocated by task 213: [ 34.610802] kasan_save_stack+0x22/0x50 [ 34.611087] kasan_set_track+0x25/0x30 [ 34.611387] __kasan_slab_alloc+0x59/0x70 [ 34.611680] kmem_cache_alloc+0x16b/0x370 [ 34.611968] vm_area_dup+0x20/0x160 [ 34.612234] __split_vma+0x170/0x950 [ 34.612512] split_vma+0xc6/0x110 [ 34.612763] mprotect_fixup+0x8d2/0xb30 [ 34.613084] do_mprotect_pkey+0x87e/0xd40 [ 34.613402] __x64_sys_mprotect+0x78/0xc0 [ 34.613706] do_syscall_64+0x3f/0x90 [ 34.613969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.614320] [ 34.614443] Freed by task 213: [ 34.614657] kasan_save_stack+0x22/0x50 [ 34.614933] kasan_set_track+0x25/0x30 [ 34.615204] kasan_save_free_info+0x2b/0x50 [ 34.615509] __kasan_slab_free+0x10a/0x190 [ 34.615803] kmem_cache_free+0x10d/0x4d0 [ 34.616078] rcu_core+0x8c8/0x2860 [ 34.616324] __do_softirq+0x1b7/0x7d4 [ 34.616594] [ 34.616715] Last potentially related work creation: [ 34.617064] kasan_save_stack+0x22/0x50 [ 34.617344] __kasan_record_aux_stack+0x8e/0xa0 [ 34.617661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.618018] remove_vma+0x139/0x170 [ 34.618265] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.618582] do_vmi_munmap+0x1f1/0x2b0 [ 34.618846] __vm_munmap+0x138/0x3a0 [ 34.619099] __x64_sys_munmap+0x59/0x80 [ 34.619382] do_syscall_64+0x3f/0x90 [ 34.619643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.619991] [ 34.620109] The buggy address belongs to the object at ffff88800f4512b8 [ 34.620109] which belongs to the cache vm_area_struct of size 168 [ 34.620937] The buggy address is located 88 bytes inside of [ 34.620937] freed 168-byte region [ffff88800f4512b8, ffff88800f451360) [ 34.621721] [ 34.621838] The buggy address belongs to the physical page: [ 34.622201] page:000000008a81c114 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf451 [ 34.622805] memcg:ffff88800ddd6301 [ 34.623043] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.623410] page_type: 0xffffffff() [ 34.623661] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.624163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd6301 [ 34.624673] page dumped because: kasan: bad access detected [ 34.625052] [ 34.625170] Memory state around the buggy address: [ 34.625517] ffff88800f451200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.626024] ffff88800f451280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.626547] >ffff88800f451300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.627059] ^ [ 34.627313] ffff88800f451380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.627792] ffff88800f451400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.628247] ================================================================== [ 34.628745] Disabling lock debugging due to kernel taint [ 37.054894] BUG: Bad rss-counter state mm:000000003d900c1b type:MM_FILEPAGES val:33 [ 37.056068] BUG: Bad rss-counter state mm:000000003d900c1b type:MM_ANONPAGES val:22 [ 37.536483] BUG: Bad rss-counter state mm:00000000b4c7f267 type:MM_FILEPAGES val:33 [ 37.537700] BUG: Bad rss-counter state mm:00000000b4c7f267 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28382' (ECDSA) to the list of known hosts. 2023/06/19 15:27:17 fuzzer started 2023/06/19 15:27:17 dialing manager at localhost:44161 2023/06/19 15:27:17 checking machine... 2023/06/19 15:27:17 checking revisions... [ 38.146876] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:27:17 testing simple program... [ 38.193628] cgroup: Unknown subsys name 'net' [ 38.245528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:27:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdb66eb668 CR3=000000000c5c4000 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=2036313a37323a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37323a3531203931 XMM08=3d656e696c646d632022656369767265 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=00007f22d8356e40 CR3=000000000c5c4000 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=37323a3531203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343031 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000