syzkaller login: [ 40.314687] BUG: Bad rss-counter state mm:00000000d48bfaf2 type:MM_FILEPAGES val:33 [ 40.315902] BUG: Bad rss-counter state mm:00000000d48bfaf2 type:MM_ANONPAGES val:22 [ 40.355588] ================================================================== [ 40.356547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.357587] Read of size 8 at addr ffff88800c5664e0 by task sshd/218 [ 40.358374] [ 40.358596] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.359522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.360526] Call Trace: [ 40.360856] [ 40.361153] dump_stack_lvl+0x91/0xf0 [ 40.361660] print_report+0xcc/0x620 [ 40.362157] ? __virt_addr_valid+0x102/0x340 [ 40.362731] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.363371] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.364012] kasan_report+0xbe/0xf0 [ 40.364501] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.365136] vma_interval_tree_remove+0xc75/0xec0 [ 40.365754] vma_prepare+0xc54/0x11a0 [ 40.366246] __split_vma+0x5af/0x950 [ 40.366751] ? __pfx___split_vma+0x10/0x10 [ 40.367297] ? find_held_lock+0x2c/0x110 [ 40.367829] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.368409] ? lock_is_held_type+0x9f/0x120 [ 40.368956] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.369573] ? mtree_range_walk+0x632/0x900 [ 40.370127] ? mas_walk+0x5c7/0x7c0 [ 40.370601] do_vmi_munmap+0x1f1/0x2b0 [ 40.371110] mmap_region+0x1f9/0x2660 [ 40.371592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.372107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.372825] ? __pfx_lock_acquire+0x10/0x10 [ 40.373360] ? __pfx_mmap_region+0x10/0x10 [ 40.373890] ? security_mmap_addr+0x7d/0xa0 [ 40.374420] ? get_unmapped_area+0x1f5/0x3f0 [ 40.374980] do_mmap+0x854/0xf00 [ 40.375421] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.375923] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.376491] ksys_mmap_pgoff+0x3af/0x500 [ 40.376999] do_syscall_64+0x3f/0x90 [ 40.377476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.378134] RIP: 0033:0x7fefefd5ad82 [ 40.378594] 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 [ 40.380758] RSP: 002b:00007ffde5bb5ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.381669] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefefd5ad82 [ 40.382519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefef194000 [ 40.383382] RBP: 00007fefef194000 R08: 0000000000000009 R09: 0000000000001000 [ 40.384232] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591679dcec0 [ 40.385080] R13: 00007ffde5bb5ae0 R14: 00007ffde5bb5b10 R15: 00007ffde5bb5e70 [ 40.385935] [ 40.386226] [ 40.386439] Allocated by task 211: [ 40.386872] kasan_save_stack+0x22/0x50 [ 40.387372] kasan_set_track+0x25/0x30 [ 40.387863] __kasan_slab_alloc+0x59/0x70 [ 40.388386] kmem_cache_alloc+0x16b/0x370 [ 40.388897] vm_area_dup+0x20/0x160 [ 40.389349] __split_vma+0x170/0x950 [ 40.389812] split_vma+0xc6/0x110 [ 40.390251] mprotect_fixup+0x8d2/0xb30 [ 40.390777] do_mprotect_pkey+0x87e/0xd40 [ 40.391299] __x64_sys_mprotect+0x78/0xc0 [ 40.391822] do_syscall_64+0x3f/0x90 [ 40.392297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.392937] [ 40.393149] Freed by task 211: [ 40.393541] kasan_save_stack+0x22/0x50 [ 40.394050] kasan_set_track+0x25/0x30 [ 40.394549] kasan_save_free_info+0x2b/0x50 [ 40.395114] __kasan_slab_free+0x10a/0x190 [ 40.395646] kmem_cache_free+0x10d/0x4d0 [ 40.396157] rcu_core+0x8c8/0x2860 [ 40.396601] __do_softirq+0x1b7/0x7d4 [ 40.397083] [ 40.397298] Last potentially related work creation: [ 40.397889] kasan_save_stack+0x22/0x50 [ 40.398389] __kasan_record_aux_stack+0x8e/0xa0 [ 40.398973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.399614] remove_vma+0x139/0x170 [ 40.400067] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.400632] do_vmi_munmap+0x1f1/0x2b0 [ 40.401118] __vm_munmap+0x138/0x3a0 [ 40.401590] __x64_sys_munmap+0x59/0x80 [ 40.402089] do_syscall_64+0x3f/0x90 [ 40.402564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.403216] [ 40.403429] The buggy address belongs to the object at ffff88800c566488 [ 40.403429] which belongs to the cache vm_area_struct of size 168 [ 40.404895] The buggy address is located 88 bytes inside of [ 40.404895] freed 168-byte region [ffff88800c566488, ffff88800c566530) [ 40.406282] [ 40.406496] The buggy address belongs to the physical page: [ 40.407149] page:0000000098a1d4de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc566 [ 40.408225] memcg:ffff88800cfc8a01 [ 40.408648] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.409366] page_type: 0xffffffff() [ 40.409821] raw: 0100000000000200 ffff88800879fc80 ffffea0000376700 dead000000000005 [ 40.410756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfc8a01 [ 40.411653] page dumped because: kasan: bad access detected [ 40.412311] [ 40.412523] Memory state around the buggy address: [ 40.413103] ffff88800c566380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.413951] ffff88800c566400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.414802] >ffff88800c566480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.415652] ^ [ 40.416398] ffff88800c566500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.417248] ffff88800c566580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.418093] ================================================================== [ 40.419298] Disabling lock debugging due to kernel taint [ 42.485233] BUG: Bad rss-counter state mm:00000000f58a360d type:MM_FILEPAGES val:33 [ 42.486211] BUG: Bad rss-counter state mm:00000000f58a360d type:MM_ANONPAGES val:22 [ 42.977537] BUG: Bad rss-counter state mm:000000005f2e75a5 type:MM_FILEPAGES val:33 [ 42.978529] BUG: Bad rss-counter state mm:000000005f2e75a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64146' (ECDSA) to the list of known hosts. 2023/06/19 21:37:23 fuzzer started 2023/06/19 21:37:23 dialing manager at localhost:44161 2023/06/19 21:37:23 checking machine... 2023/06/19 21:37:23 checking revisions... [ 43.783796] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:37:23 testing simple program... [ 43.825050] cgroup: Unknown subsys name 'net' [ 43.889685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:37:21 Registers: info registers vcpu 0 RAX=000055da09a06308 RBX=000055da09a062d0 RCX=0000000000000001 RDX=0000000000000003 RSI=000055da09a05ee0 RDI=000055da099ffd60 RBP=0000000000000010 RSP=00007ffe9624b2c8 R8 =0000000000000000 R9 =00000000000fa580 R10=00007f75c655ea34 R11=000000000052545f R12=00007ffe9624b360 R13=0000000000000001 R14=00000000000fa580 R15=0000000000000000 RIP=00007f75c64fb5f0 RFL=00000297 [--S-APC] 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 00007f75c5969900 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=00007f75c4db2450 CR3=000000000c94c000 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=00000000000000003832323d4449505f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=87675804239869d400000000000ae988 XMM05=b710150e6f645e130000000000134ce8 XMM06=806171799158d9670000000000133768 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fb67a98 RSP=ffff88800fb67980 R8 =ffffffff86088c1e R9 =ffff88800fb67a80 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fb67aa0 R13=ffff88800fb67a88 R14=ffff88800fb67ae8 R15=ffff88800fb67a40 RIP=ffffffff81131151 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 00007fd8136c7900 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=00007ffd60537000 CR3=000000000eb40000 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