syzkaller login: [ 23.727220] BUG: Bad rss-counter state mm:00000000e1ce8447 type:MM_FILEPAGES val:33 [ 23.728253] BUG: Bad rss-counter state mm:00000000e1ce8447 type:MM_ANONPAGES val:22 [ 23.895804] ================================================================== [ 23.896884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.898035] Read of size 8 at addr ffff88800e524880 by task sshd/218 [ 23.899138] [ 23.899408] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.900432] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.901551] Call Trace: [ 23.901900] <TASK> [ 23.902203] dump_stack_lvl+0x91/0xf0 [ 23.902728] print_report+0xcc/0x620 [ 23.903264] ? __virt_addr_valid+0x102/0x340 [ 23.903877] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.904549] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.905217] kasan_report+0xbe/0xf0 [ 23.905730] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.906383] vma_interval_tree_remove+0xc75/0xec0 [ 23.907008] vma_prepare+0xc54/0x11a0 [ 23.907505] __split_vma+0x5af/0x950 [ 23.908005] ? __pfx___split_vma+0x10/0x10 [ 23.908559] ? find_held_lock+0x2c/0x110 [ 23.909087] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.909663] ? lock_is_held_type+0x9f/0x120 [ 23.910211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.910838] ? mtree_range_walk+0x632/0x900 [ 23.911431] ? mas_walk+0x5c7/0x7c0 [ 23.911907] do_vmi_munmap+0x1f1/0x2b0 [ 23.912414] mmap_region+0x1f9/0x2660 [ 23.912916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.913458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.914182] ? __pfx_lock_acquire+0x10/0x10 [ 23.914754] ? __pfx_mmap_region+0x10/0x10 [ 23.915330] ? security_mmap_addr+0x7d/0xa0 [ 23.915908] ? get_unmapped_area+0x1f5/0x3f0 [ 23.916510] do_mmap+0x854/0xf00 [ 23.916982] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.917518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.918124] ksys_mmap_pgoff+0x3af/0x500 [ 23.918670] do_syscall_64+0x3f/0x90 [ 23.919209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.919918] RIP: 0033:0x7fb8ae2aed82 [ 23.920415] 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 [ 23.922654] RSP: 002b:00007ffde9c84dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.923581] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8ae2aed82 [ 23.924437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8ad6e8000 [ 23.925311] RBP: 00007fb8ad6e8000 R08: 0000000000000009 R09: 0000000000001000 [ 23.926171] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a6a291ec0 [ 23.927023] R13: 00007ffde9c84de0 R14: 00007ffde9c84e10 R15: 00007ffde9c85170 [ 23.927880] </TASK> [ 23.928170] [ 23.928386] Allocated by task 211: [ 23.928835] kasan_save_stack+0x22/0x50 [ 23.929370] kasan_set_track+0x25/0x30 [ 23.929891] __kasan_slab_alloc+0x59/0x70 [ 23.930436] kmem_cache_alloc+0x16b/0x370 [ 23.930991] vm_area_dup+0x20/0x160 [ 23.931485] __split_vma+0x170/0x950 [ 23.931962] split_vma+0xc6/0x110 [ 23.932415] mprotect_fixup+0x8d2/0xb30 [ 23.932962] do_mprotect_pkey+0x87e/0xd40 [ 23.933528] __x64_sys_mprotect+0x78/0xc0 [ 23.934098] do_syscall_64+0x3f/0x90 [ 23.934624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.935335] [ 23.935570] Freed by task 211: [ 23.935991] kasan_save_stack+0x22/0x50 [ 23.936511] kasan_set_track+0x25/0x30 [ 23.937033] kasan_save_free_info+0x2b/0x50 [ 23.937578] __kasan_slab_free+0x10a/0x190 [ 23.938146] kmem_cache_free+0x10d/0x4d0 [ 23.938674] rcu_core+0x8c8/0x2860 [ 23.939130] __do_softirq+0x1b7/0x7d4 [ 23.939605] [ 23.939821] Last potentially related work creation: [ 23.940504] kasan_save_stack+0x22/0x50 [ 23.941002] __kasan_record_aux_stack+0x8e/0xa0 [ 23.941570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.942225] remove_vma+0x139/0x170 [ 23.942683] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.943249] do_vmi_munmap+0x1f1/0x2b0 [ 23.943734] __vm_munmap+0x138/0x3a0 [ 23.944240] __x64_sys_munmap+0x59/0x80 [ 23.944756] do_syscall_64+0x3f/0x90 [ 23.945251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945903] [ 23.946117] Second to last potentially related work creation: [ 23.946791] kasan_save_stack+0x22/0x50 [ 23.947323] __kasan_record_aux_stack+0x8e/0xa0 [ 23.947902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.948542] remove_vma+0x139/0x170 [ 23.948988] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.949537] do_vmi_munmap+0x1f1/0x2b0 [ 23.950018] mmap_region+0x1f9/0x2660 [ 23.950484] do_mmap+0x854/0xf00 [ 23.950944] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.951450] ksys_mmap_pgoff+0x3af/0x500 [ 23.951957] do_syscall_64+0x3f/0x90 [ 23.952464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.953155] [ 23.953384] The buggy address belongs to the object at ffff88800e524828 [ 23.953384] which belongs to the cache vm_area_struct of size 168 [ 23.954988] The buggy address is located 88 bytes inside of [ 23.954988] freed 168-byte region [ffff88800e524828, ffff88800e5248d0) [ 23.956410] [ 23.956636] The buggy address belongs to the physical page: [ 23.957317] page:000000001a11ed76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe524 [ 23.958384] memcg:ffff88800de4cb01 [ 23.958803] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.959451] page_type: 0xffffffff() [ 23.959899] raw: 0100000000000200 ffff8880087a0c80 ffffea000036f6c0 dead000000000002 [ 23.960809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de4cb01 [ 23.961705] page dumped because: kasan: bad access detected [ 23.962357] [ 23.962575] Memory state around the buggy address: [ 23.963167] ffff88800e524780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 23.964011] ffff88800e524800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.964855] >ffff88800e524880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.965692] ^ [ 23.966100] ffff88800e524900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.966953] ffff88800e524980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 23.967797] ================================================================== [ 23.968726] Disabling lock debugging due to kernel taint [ 26.197771] BUG: Bad rss-counter state mm:00000000ac94b95f type:MM_FILEPAGES val:33 [ 26.199172] BUG: Bad rss-counter state mm:00000000ac94b95f type:MM_ANONPAGES val:22 [ 26.741633] BUG: Bad rss-counter state mm:00000000b15b0b2e type:MM_FILEPAGES val:33 [ 26.742883] BUG: Bad rss-counter state mm:00000000b15b0b2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42371' (ECDSA) to the list of known hosts. 2023/06/20 22:07:54 fuzzer started 2023/06/20 22:07:55 dialing manager at localhost:36067 2023/06/20 22:07:55 checking machine... 2023/06/20 22:07:55 checking revisions... [ 27.479811] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:07:55 testing simple program... [ 27.535287] cgroup: Unknown subsys name 'net' [ 27.573992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:54 Registers: info registers vcpu 0 RAX=1ffffffff0a57e9d RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff88800d89fd28 RSP=ffff88800d89fc60 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000dd R11=0000000000000000 R12=0000000000000015 R13=ffff88800d89fd60 R14=0000000000000015 R15=ffffc9000068f678 RIP=ffffffff815a2a0f 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 00007fb777fca900 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=00007fb777441770 CR3=000000000682a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1017ac3fb07cea7400000000000ae988 XMM05=0a73ff2721370f5f0000000000133850 XMM06=bdf2e299e47b49d500000000001322d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff8880159d51c0 RCX=0000000000010000 RDX=1ffff11002b3ac81 RSI=0000000000000002 RDI=ffff8880159d6408 RBP=ffff88800f77d800 RSP=ffff88806cf09d78 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000012876fc338 R12=0000000000000002 R13=00000000000f4240 R14=ffff8880169eb738 R15=dffffc0000000000 RIP=ffffffff84511dca 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 00007efff1312900 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=00007ffd65420000 CR3=0000000009a34000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000