syzkaller login: [ 31.170639] BUG: Bad rss-counter state mm:0000000050c12dd3 type:MM_FILEPAGES val:33 [ 31.172036] BUG: Bad rss-counter state mm:0000000050c12dd3 type:MM_ANONPAGES val:22 [ 31.341998] ================================================================== [ 31.342846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.343721] Read of size 8 at addr ffff88800973e798 by task sshd/219 [ 31.344438] [ 31.344745] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.345554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.346488] Call Trace: [ 31.346808] [ 31.347076] dump_stack_lvl+0x91/0xf0 [ 31.347543] print_report+0xcc/0x620 [ 31.347997] ? __virt_addr_valid+0x102/0x340 [ 31.348519] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349101] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349701] kasan_report+0xbe/0xf0 [ 31.350150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350735] vma_interval_tree_remove+0xc75/0xec0 [ 31.351308] vma_prepare+0xc54/0x11a0 [ 31.351759] __split_vma+0x5af/0x950 [ 31.352206] ? __pfx___split_vma+0x10/0x10 [ 31.352704] ? find_held_lock+0x2c/0x110 [ 31.353201] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.353740] ? lock_is_held_type+0x9f/0x120 [ 31.354264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.354853] ? mtree_range_walk+0x632/0x900 [ 31.355397] ? mas_walk+0x5c7/0x7c0 [ 31.355860] do_vmi_munmap+0x1f1/0x2b0 [ 31.356343] mmap_region+0x1f9/0x2660 [ 31.356821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.357332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.358025] ? __pfx_lock_acquire+0x10/0x10 [ 31.358550] ? __pfx_mmap_region+0x10/0x10 [ 31.359074] ? security_mmap_addr+0x7d/0xa0 [ 31.359604] ? get_unmapped_area+0x1f5/0x3f0 [ 31.360153] do_mmap+0x854/0xf00 [ 31.360584] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.361076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.361650] ksys_mmap_pgoff+0x3af/0x500 [ 31.362152] do_syscall_64+0x3f/0x90 [ 31.362620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.363246] RIP: 0033:0x7febdff1ed82 [ 31.363696] 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 [ 31.365791] RSP: 002b:00007fff9b8b3e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.366679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febdff1ed82 [ 31.367501] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febdf358000 [ 31.368335] RBP: 00007febdf358000 R08: 0000000000000009 R09: 0000000000001000 [ 31.369166] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8f0008ec0 [ 31.369999] R13: 00007fff9b8b3ea0 R14: 00007fff9b8b3ed0 R15: 00007fff9b8b4230 [ 31.370847] [ 31.371129] [ 31.371335] Allocated by task 212: [ 31.371752] kasan_save_stack+0x22/0x50 [ 31.372249] kasan_set_track+0x25/0x30 [ 31.372729] __kasan_slab_alloc+0x59/0x70 [ 31.373253] kmem_cache_alloc+0x16b/0x370 [ 31.373774] vm_area_dup+0x20/0x160 [ 31.374232] __split_vma+0x170/0x950 [ 31.374682] split_vma+0xc6/0x110 [ 31.375119] mprotect_fixup+0x8d2/0xb30 [ 31.375610] do_mprotect_pkey+0x87e/0xd40 [ 31.376122] __x64_sys_mprotect+0x78/0xc0 [ 31.376638] do_syscall_64+0x3f/0x90 [ 31.377099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377730] [ 31.377943] Freed by task 19: [ 31.378319] kasan_save_stack+0x22/0x50 [ 31.378814] kasan_set_track+0x25/0x30 [ 31.379305] kasan_save_free_info+0x2b/0x50 [ 31.379826] __kasan_slab_free+0x10a/0x190 [ 31.380361] kmem_cache_free+0x10d/0x4d0 [ 31.380857] rcu_core+0x8c8/0x2860 [ 31.381295] __do_softirq+0x1b7/0x7d4 [ 31.381781] [ 31.381988] Last potentially related work creation: [ 31.382553] kasan_save_stack+0x22/0x50 [ 31.383048] __kasan_record_aux_stack+0x8e/0xa0 [ 31.383604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384232] remove_vma+0x139/0x170 [ 31.384675] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385223] do_vmi_munmap+0x1f1/0x2b0 [ 31.385707] __vm_munmap+0x138/0x3a0 [ 31.386161] __x64_sys_munmap+0x59/0x80 [ 31.386646] do_syscall_64+0x3f/0x90 [ 31.387121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387743] [ 31.387953] The buggy address belongs to the object at ffff88800973e740 [ 31.387953] which belongs to the cache vm_area_struct of size 168 [ 31.389400] The buggy address is located 88 bytes inside of [ 31.389400] freed 168-byte region [ffff88800973e740, ffff88800973e7e8) [ 31.390775] [ 31.390987] The buggy address belongs to the physical page: [ 31.391628] page:00000000bc20c273 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800973e9f8 pfn:0x973e [ 31.392838] memcg:ffff88800c5a8f01 [ 31.393249] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.393949] page_type: 0xffffffff() [ 31.394389] raw: 0100000000000200 ffff8880087a0c80 ffffea0000378180 dead000000000005 [ 31.395289] raw: ffff88800973e9f8 000000008011000b 00000001ffffffff ffff88800c5a8f01 [ 31.396184] page dumped because: kasan: bad access detected [ 31.396823] [ 31.397040] Memory state around the buggy address: [ 31.397610] ffff88800973e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.398446] ffff88800973e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.399281] >ffff88800973e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.400117] ^ [ 31.400600] ffff88800973e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.401435] ffff88800973e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.402290] ================================================================== [ 31.403229] Disabling lock debugging due to kernel taint [ 33.235972] BUG: Bad rss-counter state mm:000000009be632fc type:MM_FILEPAGES val:33 [ 33.237378] BUG: Bad rss-counter state mm:000000009be632fc type:MM_ANONPAGES val:22 [ 33.703181] BUG: Bad rss-counter state mm:0000000099bb0656 type:MM_FILEPAGES val:33 [ 33.704434] BUG: Bad rss-counter state mm:0000000099bb0656 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58988' (ECDSA) to the list of known hosts. 2023/06/21 06:11:43 fuzzer started 2023/06/21 06:11:43 dialing manager at localhost:36067 2023/06/21 06:11:43 checking machine... 2023/06/21 06:11:43 checking revisions... [ 34.414506] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:11:43 testing simple program... [ 34.455607] cgroup: Unknown subsys name 'net' [ 34.505688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:11:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=000055d4ff7b9290 CR3=0000000005482000 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=00007fdcac8de5100000562c4dbd2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888006876000 RCX=0000000000000000 RDX=1ffff11000d0ecee RSI=ffffffff81894130 RDI=ffff888006876770 RBP=ffff88800ff64b78 RSP=ffff88801453f530 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000081 R13=ffffffff856f0da0 R14=ffff88800ff64ba0 R15=ffff88800ff64b7a RIP=ffffffff818941a3 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 00007fe8e5cfa900 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=00007fc63a86c650 CR3=000000000c9cc000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5e5b2b2b723ca6a200000000000ae988 XMM05=105a94b2b039033a0000000000132620 XMM06=806171799158d9670000000000131410 XMM07=fb795ef6d65770560000000000121750 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000