syzkaller login: [ 30.593318] BUG: Bad rss-counter state mm:000000000a2fb8f5 type:MM_FILEPAGES val:33 [ 30.594706] BUG: Bad rss-counter state mm:000000000a2fb8f5 type:MM_ANONPAGES val:22 [ 30.745584] ================================================================== [ 30.746792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.747832] Read of size 8 at addr ffff88800f649a50 by task sshd/220 [ 30.748698] [ 30.748937] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.749896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.750961] Call Trace: [ 30.751313] [ 30.751625] dump_stack_lvl+0x91/0xf0 [ 30.752163] print_report+0xcc/0x620 [ 30.752694] ? __virt_addr_valid+0x102/0x340 [ 30.753307] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753985] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754662] kasan_report+0xbe/0xf0 [ 30.755179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755864] vma_interval_tree_remove+0xc75/0xec0 [ 30.756527] vma_prepare+0xc54/0x11a0 [ 30.757078] __split_vma+0x5af/0x950 [ 30.757604] ? __pfx___split_vma+0x10/0x10 [ 30.758187] ? find_held_lock+0x2c/0x110 [ 30.758759] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.759380] ? lock_is_held_type+0x9f/0x120 [ 30.759976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.760615] ? mtree_range_walk+0x632/0x900 [ 30.761176] ? mas_walk+0x5c7/0x7c0 [ 30.761712] do_vmi_munmap+0x1f1/0x2b0 [ 30.762255] mmap_region+0x1f9/0x2660 [ 30.762797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.763364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.764150] ? __pfx_lock_acquire+0x10/0x10 [ 30.764737] ? __pfx_mmap_region+0x10/0x10 [ 30.765334] ? security_mmap_addr+0x7d/0xa0 [ 30.765917] ? get_unmapped_area+0x1f5/0x3f0 [ 30.766527] do_mmap+0x854/0xf00 [ 30.767011] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.767579] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.768203] ksys_mmap_pgoff+0x3af/0x500 [ 30.768772] do_syscall_64+0x3f/0x90 [ 30.769327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770044] RIP: 0033:0x7f1daaf83d82 [ 30.770583] 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 [ 30.772975] RSP: 002b:00007ffd3c1ea188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.774035] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1daaf83d82 [ 30.775013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1daa3bd000 [ 30.776003] RBP: 00007f1daa3bd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.776878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d128bdbec0 [ 30.777752] R13: 00007ffd3c1ea1a0 R14: 00007ffd3c1ea1d0 R15: 00007ffd3c1ea530 [ 30.778597] [ 30.778889] [ 30.779106] Allocated by task 213: [ 30.779548] kasan_save_stack+0x22/0x50 [ 30.780052] kasan_set_track+0x25/0x30 [ 30.780551] __kasan_slab_alloc+0x59/0x70 [ 30.781099] kmem_cache_alloc+0x16b/0x370 [ 30.781615] vm_area_dup+0x20/0x160 [ 30.782074] __split_vma+0x170/0x950 [ 30.782556] split_vma+0xc6/0x110 [ 30.782996] mprotect_fixup+0x8d2/0xb30 [ 30.783508] do_mprotect_pkey+0x87e/0xd40 [ 30.784030] __x64_sys_mprotect+0x78/0xc0 [ 30.784544] do_syscall_64+0x3f/0x90 [ 30.785021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785690] [ 30.785907] Freed by task 213: [ 30.786305] kasan_save_stack+0x22/0x50 [ 30.786874] kasan_set_track+0x25/0x30 [ 30.787387] kasan_save_free_info+0x2b/0x50 [ 30.787916] __kasan_slab_free+0x10a/0x190 [ 30.788451] kmem_cache_free+0x10d/0x4d0 [ 30.789010] rcu_core+0x8c8/0x2860 [ 30.789571] __do_softirq+0x1b7/0x7d4 [ 30.790152] [ 30.790362] Last potentially related work creation: [ 30.790971] kasan_save_stack+0x22/0x50 [ 30.791472] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.792685] remove_vma+0x139/0x170 [ 30.793158] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.793715] do_vmi_munmap+0x1f1/0x2b0 [ 30.794199] __vm_munmap+0x138/0x3a0 [ 30.794667] __x64_sys_munmap+0x59/0x80 [ 30.795163] do_syscall_64+0x3f/0x90 [ 30.795640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796283] [ 30.796501] The buggy address belongs to the object at ffff88800f6499f8 [ 30.796501] which belongs to the cache vm_area_struct of size 168 [ 30.798065] The buggy address is located 88 bytes inside of [ 30.798065] freed 168-byte region [ffff88800f6499f8, ffff88800f649aa0) [ 30.799619] [ 30.799858] The buggy address belongs to the physical page: [ 30.800594] page:00000000b4b09f5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf649 [ 30.801809] memcg:ffff888019ec7701 [ 30.802283] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803003] page_type: 0xffffffff() [ 30.803507] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.804527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec7701 [ 30.805548] page dumped because: kasan: bad access detected [ 30.806281] [ 30.806519] Memory state around the buggy address: [ 30.807161] ffff88800f649900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.808106] ffff88800f649980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.809062] >ffff88800f649a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.810018] ^ [ 30.810803] ffff88800f649a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.811763] ffff88800f649b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.812707] ================================================================== [ 30.813842] Disabling lock debugging due to kernel taint [ 33.524978] BUG: Bad rss-counter state mm:00000000a40f3b83 type:MM_FILEPAGES val:33 [ 33.526290] BUG: Bad rss-counter state mm:00000000a40f3b83 type:MM_ANONPAGES val:22 [ 34.022080] BUG: Bad rss-counter state mm:00000000115893f9 type:MM_FILEPAGES val:33 [ 34.023274] BUG: Bad rss-counter state mm:00000000115893f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29211' (ECDSA) to the list of known hosts. 2023/06/20 18:54:55 fuzzer started 2023/06/20 18:54:55 dialing manager at localhost:36067 2023/06/20 18:54:55 checking machine... 2023/06/20 18:54:55 checking revisions... [ 34.758177] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:54:55 testing simple program... [ 34.802975] cgroup: Unknown subsys name 'net' [ 34.842953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:54 Registers: info registers vcpu 0 RAX=0000559b78bf9de0 RBX=0000000000000000 RCX=0000000000009c40 RDX=0000000000000001 RSI=0000000000000001 RDI=0000559b78bf9e68 RBP=0000000000000001 RSP=00007fea004225b8 R8 =0000000000000003 R9 =0000000000000000 R10=00007fea00422788 R11=0000000000000000 R12=0000000000000001 R13=00007fe9f0007000 R14=0000559b78bf9c80 R15=00007fea00422788 RIP=00007fea00a64f70 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea00426700 00000000 00000000 GS =0000 0000000000000000 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=00007f5b96cd5940 CR3=0000000016c06000 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=34353a3831203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32343530352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323435 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=0000000080000001 RBX=000000000001b7e2 RCX=ffffffff8170aac4 RDX=ffff888018ef0000 RSI=0000000000000000 RDI=0000000000000005 RBP=1ffff11001dc4ee0 RSP=ffff88800ee276f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f0763a0 R13=00007f0133609000 R14=800000001b7e2025 R15=0000000000000000 RIP=ffffffff814c086b 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 00007f0133638900 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=00007f0133617020 CR3=000000000e86a000 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