syzkaller login: [ 32.170924] BUG: Bad rss-counter state mm:00000000b1c812c3 type:MM_FILEPAGES val:33 [ 32.172933] BUG: Bad rss-counter state mm:00000000b1c812c3 type:MM_ANONPAGES val:22 [ 32.334014] ================================================================== [ 32.334966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.335957] Read of size 8 at addr ffff88800e227b38 by task sshd/220 [ 32.336718] [ 32.336939] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.337794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.338776] Call Trace: [ 32.339095] [ 32.339376] dump_stack_lvl+0x91/0xf0 [ 32.339864] print_report+0xcc/0x620 [ 32.340353] ? __virt_addr_valid+0x102/0x340 [ 32.340946] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.341574] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.342223] kasan_report+0xbe/0xf0 [ 32.342713] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.343353] vma_interval_tree_remove+0xc75/0xec0 [ 32.344002] vma_prepare+0xc54/0x11a0 [ 32.344481] __split_vma+0x5af/0x950 [ 32.344952] ? __pfx___split_vma+0x10/0x10 [ 32.345483] ? find_held_lock+0x2c/0x110 [ 32.346212] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.346776] ? lock_is_held_type+0x9f/0x120 [ 32.347315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.347938] ? mtree_range_walk+0x632/0x900 [ 32.348484] ? mas_walk+0x5c7/0x7c0 [ 32.348960] do_vmi_munmap+0x1f1/0x2b0 [ 32.349455] mmap_region+0x1f9/0x2660 [ 32.349940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.350449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.351163] ? __pfx_lock_acquire+0x10/0x10 [ 32.351710] ? __pfx_mmap_region+0x10/0x10 [ 32.352239] ? security_mmap_addr+0x7d/0xa0 [ 32.352771] ? get_unmapped_area+0x1f5/0x3f0 [ 32.353319] do_mmap+0x854/0xf00 [ 32.353759] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.354251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.354815] ksys_mmap_pgoff+0x3af/0x500 [ 32.355324] do_syscall_64+0x3f/0x90 [ 32.355813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.356461] RIP: 0033:0x7f8ebe60cd82 [ 32.356914] 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 [ 32.359045] RSP: 002b:00007ffca4f823c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.359951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ebe60cd82 [ 32.360796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ebda46000 [ 32.361747] RBP: 00007f8ebda46000 R08: 0000000000000009 R09: 0000000000001000 [ 32.362595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d0c74dec0 [ 32.363448] R13: 00007ffca4f823e0 R14: 00007ffca4f82410 R15: 00007ffca4f82770 [ 32.364319] [ 32.364615] [ 32.364831] Allocated by task 212: [ 32.365261] kasan_save_stack+0x22/0x50 [ 32.365764] kasan_set_track+0x25/0x30 [ 32.366256] __kasan_slab_alloc+0x59/0x70 [ 32.366780] kmem_cache_alloc+0x16b/0x370 [ 32.367292] vm_area_dup+0x20/0x160 [ 32.367750] __split_vma+0x170/0x950 [ 32.368264] split_vma+0xc6/0x110 [ 32.368712] mprotect_fixup+0x8d2/0xb30 [ 32.369219] do_mprotect_pkey+0x87e/0xd40 [ 32.369746] __x64_sys_mprotect+0x78/0xc0 [ 32.370281] do_syscall_64+0x3f/0x90 [ 32.370761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.371416] [ 32.371654] Freed by task 212: [ 32.372056] kasan_save_stack+0x22/0x50 [ 32.372578] kasan_set_track+0x25/0x30 [ 32.373089] kasan_save_free_info+0x2b/0x50 [ 32.373630] __kasan_slab_free+0x10a/0x190 [ 32.374180] kmem_cache_free+0x10d/0x4d0 [ 32.374696] rcu_core+0x8c8/0x2860 [ 32.375152] __do_softirq+0x1b7/0x7d4 [ 32.375646] [ 32.375864] Last potentially related work creation: [ 32.376460] kasan_save_stack+0x22/0x50 [ 32.376977] __kasan_record_aux_stack+0x8e/0xa0 [ 32.377547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.378193] remove_vma+0x139/0x170 [ 32.378652] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.379211] do_vmi_munmap+0x1f1/0x2b0 [ 32.379701] __vm_munmap+0x138/0x3a0 [ 32.380166] __x64_sys_munmap+0x59/0x80 [ 32.380664] do_syscall_64+0x3f/0x90 [ 32.381139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.381780] [ 32.381997] The buggy address belongs to the object at ffff88800e227ae0 [ 32.381997] which belongs to the cache vm_area_struct of size 168 [ 32.383465] The buggy address is located 88 bytes inside of [ 32.383465] freed 168-byte region [ffff88800e227ae0, ffff88800e227b88) [ 32.384893] [ 32.385112] The buggy address belongs to the physical page: [ 32.385775] page:00000000fe008414 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe227 [ 32.386864] memcg:ffff88800970ae01 [ 32.387297] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.388029] page_type: 0xffffffff() [ 32.388478] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.389405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800970ae01 [ 32.390332] page dumped because: kasan: bad access detected [ 32.390993] [ 32.391218] Memory state around the buggy address: [ 32.391830] ffff88800e227a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.392690] ffff88800e227a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.393559] >ffff88800e227b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.394426] ^ [ 32.395201] ffff88800e227b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.396191] ffff88800e227c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.397066] ================================================================== [ 32.398001] Disabling lock debugging due to kernel taint [ 35.048650] BUG: Bad rss-counter state mm:00000000ad9de1f2 type:MM_FILEPAGES val:33 [ 35.049818] BUG: Bad rss-counter state mm:00000000ad9de1f2 type:MM_ANONPAGES val:22 [ 35.480924] BUG: Bad rss-counter state mm:00000000076236cd type:MM_FILEPAGES val:33 [ 35.482191] BUG: Bad rss-counter state mm:00000000076236cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36483' (ECDSA) to the list of known hosts. 2023/06/19 11:47:48 fuzzer started 2023/06/19 11:47:48 dialing manager at localhost:44161 2023/06/19 11:47:48 checking machine... 2023/06/19 11:47:48 checking revisions... [ 36.216685] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:47:48 testing simple program... [ 36.272205] cgroup: Unknown subsys name 'net' [ 36.312903] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:47:44 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=00007f3e7469201c CR3=000000000f3ae000 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=37343a3131203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732037343a3734 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383037 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=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000576 RDI=ffff8880147824c0 RBP=ffff888015c6ff58 RSP=ffff888015c6fed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000007 R13=00007f37d50f0270 R14=0000000000000001 R15=ffff888015fae5c0 RIP=ffffffff84519b74 RFL=00000282 [--S----] 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 00007f37d5cb6900 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=00007f37d50f0270 CR3=000000000d5d2000 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=1a0a507e6998591600000000000ae988 XMM05=d07df8cf37212fae0000000000134be8 XMM06=c291bd5c70af25b900000000001339d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000