syzkaller login: [ 30.514166] BUG: Bad rss-counter state mm:00000000aec6027f type:MM_FILEPAGES val:33 [ 30.515357] BUG: Bad rss-counter state mm:00000000aec6027f type:MM_ANONPAGES val:22 [ 30.557706] ================================================================== [ 30.558840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.559765] Read of size 8 at addr ffff88800ce46798 by task sshd/220 [ 30.560693] [ 30.560914] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.561784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.562742] Call Trace: [ 30.563065] [ 30.563343] dump_stack_lvl+0x91/0xf0 [ 30.563835] print_report+0xcc/0x620 [ 30.564311] ? __virt_addr_valid+0x102/0x340 [ 30.564861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.565481] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.566106] kasan_report+0xbe/0xf0 [ 30.566578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.567185] vma_interval_tree_remove+0xc75/0xec0 [ 30.567771] vma_prepare+0xc54/0x11a0 [ 30.568246] __split_vma+0x5af/0x950 [ 30.568712] ? __pfx___split_vma+0x10/0x10 [ 30.569230] ? find_held_lock+0x2c/0x110 [ 30.569758] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.570315] ? lock_is_held_type+0x9f/0x120 [ 30.570845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.571441] ? mtree_range_walk+0x632/0x900 [ 30.571992] ? mas_walk+0x5c7/0x7c0 [ 30.572467] do_vmi_munmap+0x1f1/0x2b0 [ 30.572955] mmap_region+0x1f9/0x2660 [ 30.573428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.573942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.574644] ? __pfx_lock_acquire+0x10/0x10 [ 30.575168] ? __pfx_mmap_region+0x10/0x10 [ 30.575686] ? security_mmap_addr+0x7d/0xa0 [ 30.576207] ? get_unmapped_area+0x1f5/0x3f0 [ 30.576750] do_mmap+0x854/0xf00 [ 30.577189] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.577682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.578245] ksys_mmap_pgoff+0x3af/0x500 [ 30.578740] do_syscall_64+0x3f/0x90 [ 30.579213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.579858] RIP: 0033:0x7f0143eedd82 [ 30.580309] 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 [ 30.582441] RSP: 002b:00007ffcda5d2b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.583347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0143eedd82 [ 30.584184] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0143327000 [ 30.585036] RBP: 00007f0143327000 R08: 0000000000000009 R09: 0000000000001000 [ 30.586006] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564da8b87ec0 [ 30.586853] R13: 00007ffcda5d2b80 R14: 00007ffcda5d2bb0 R15: 00007ffcda5d2f10 [ 30.587714] [ 30.588014] [ 30.588234] Allocated by task 213: [ 30.588666] kasan_save_stack+0x22/0x50 [ 30.589186] kasan_set_track+0x25/0x30 [ 30.589679] __kasan_slab_alloc+0x59/0x70 [ 30.590228] kmem_cache_alloc+0x16b/0x370 [ 30.590735] vm_area_dup+0x20/0x160 [ 30.591180] __split_vma+0x170/0x950 [ 30.591639] split_vma+0xc6/0x110 [ 30.592073] mprotect_fixup+0x8d2/0xb30 [ 30.592574] do_mprotect_pkey+0x87e/0xd40 [ 30.593086] __x64_sys_mprotect+0x78/0xc0 [ 30.593602] do_syscall_64+0x3f/0x90 [ 30.594085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.594723] [ 30.594939] Freed by task 213: [ 30.595323] kasan_save_stack+0x22/0x50 [ 30.595821] kasan_set_track+0x25/0x30 [ 30.596311] kasan_save_free_info+0x2b/0x50 [ 30.596836] __kasan_slab_free+0x10a/0x190 [ 30.597357] kmem_cache_free+0x10d/0x4d0 [ 30.597859] rcu_core+0x8c8/0x2860 [ 30.598305] __do_softirq+0x1b7/0x7d4 [ 30.598781] [ 30.598994] Last potentially related work creation: [ 30.599579] kasan_save_stack+0x22/0x50 [ 30.600077] __kasan_record_aux_stack+0x8e/0xa0 [ 30.600654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.601287] remove_vma+0x139/0x170 [ 30.601824] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.602383] do_vmi_munmap+0x1f1/0x2b0 [ 30.602874] __vm_munmap+0x138/0x3a0 [ 30.603331] __x64_sys_munmap+0x59/0x80 [ 30.603821] do_syscall_64+0x3f/0x90 [ 30.604288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.604923] [ 30.605134] Second to last potentially related work creation: [ 30.605814] kasan_save_stack+0x22/0x50 [ 30.606311] __kasan_record_aux_stack+0x8e/0xa0 [ 30.606877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.607517] remove_vma+0x139/0x170 [ 30.607959] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.608506] do_vmi_munmap+0x1f1/0x2b0 [ 30.608984] mmap_region+0x1f9/0x2660 [ 30.609458] do_mmap+0x854/0xf00 [ 30.609906] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.610395] ksys_mmap_pgoff+0x3af/0x500 [ 30.610898] do_syscall_64+0x3f/0x90 [ 30.611382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.612016] [ 30.612227] The buggy address belongs to the object at ffff88800ce46740 [ 30.612227] which belongs to the cache vm_area_struct of size 168 [ 30.613674] The buggy address is located 88 bytes inside of [ 30.613674] freed 168-byte region [ffff88800ce46740, ffff88800ce467e8) [ 30.615073] [ 30.615284] The buggy address belongs to the physical page: [ 30.615930] page:000000001b3b33ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xce46 [ 30.617017] memcg:ffff8880098eb601 [ 30.617441] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.618091] page_type: 0xffffffff() [ 30.618533] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389f00 dead000000000006 [ 30.619439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098eb601 [ 30.620324] page dumped because: kasan: bad access detected [ 30.620982] [ 30.621192] Memory state around the buggy address: [ 30.621771] ffff88800ce46680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.622613] ffff88800ce46700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.623446] >ffff88800ce46780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.624276] ^ [ 30.624755] ffff88800ce46800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.625588] ffff88800ce46880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.626441] ================================================================== [ 30.627387] Disabling lock debugging due to kernel taint [ 33.082169] BUG: Bad rss-counter state mm:000000002ff7aec1 type:MM_FILEPAGES val:33 [ 33.083432] BUG: Bad rss-counter state mm:000000002ff7aec1 type:MM_ANONPAGES val:22 [ 33.491160] BUG: Bad rss-counter state mm:000000004368d512 type:MM_FILEPAGES val:33 [ 33.492184] BUG: Bad rss-counter state mm:000000004368d512 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9247' (ECDSA) to the list of known hosts. 2023/06/20 19:06:33 fuzzer started 2023/06/20 19:06:33 dialing manager at localhost:36067 2023/06/20 19:06:33 checking machine... 2023/06/20 19:06:33 checking revisions... [ 34.199200] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:06:33 testing simple program... [ 34.243458] cgroup: Unknown subsys name 'net' [ 34.313632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:06:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018dcfe70 RCX=0000000000000000 RDX=1ffff110031b9fd2 RSI=1ffff110031b9f01 RDI=ffff888018dcfe90 RBP=0000000000001fa0 RSP=ffff888018dcfaf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f0a98000ba0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff821685b5 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 00007f0a9e26d700 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=00007ffce33d8a38 CR3=000000000eb90000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32393432352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323934 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff8880147403f4 RBP=00007fc055736ace RSP=ffff88801473f408 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=00007fc055736ace R13=0000000000000000 R14=ffff888014740000 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc054bb2900 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=00007fc05400e890 CR3=000000000c654000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=718443dc3357fa4f00000000000ae988 XMM05=3081aa1128f3ab8b0000000000134510 XMM06=4fda316b135da52b0000000000133300 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000