syzkaller login: [ 34.270665] BUG: Bad rss-counter state mm:000000007e58c295 type:MM_FILEPAGES val:33 [ 34.271876] BUG: Bad rss-counter state mm:000000007e58c295 type:MM_ANONPAGES val:22 [ 34.317980] ================================================================== [ 34.319130] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.320059] Read of size 8 at addr ffff88800defc228 by task sshd/219 [ 34.320884] [ 34.321124] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.321984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.323004] Call Trace: [ 34.323350] [ 34.323635] dump_stack_lvl+0x91/0xf0 [ 34.324168] print_report+0xcc/0x620 [ 34.324681] ? __virt_addr_valid+0x102/0x340 [ 34.325240] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.325863] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.326499] kasan_report+0xbe/0xf0 [ 34.326980] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.327611] vma_interval_tree_remove+0xc75/0xec0 [ 34.328219] vma_prepare+0xc54/0x11a0 [ 34.328713] __split_vma+0x5af/0x950 [ 34.329190] ? __pfx___split_vma+0x10/0x10 [ 34.329719] ? find_held_lock+0x2c/0x110 [ 34.330299] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.330880] ? lock_is_held_type+0x9f/0x120 [ 34.331425] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.332037] ? mtree_range_walk+0x632/0x900 [ 34.332590] ? mas_walk+0x5c7/0x7c0 [ 34.333068] do_vmi_munmap+0x1f1/0x2b0 [ 34.333569] mmap_region+0x1f9/0x2660 [ 34.334066] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.334606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.335329] ? __pfx_lock_acquire+0x10/0x10 [ 34.335867] ? __pfx_mmap_region+0x10/0x10 [ 34.336398] ? security_mmap_addr+0x7d/0xa0 [ 34.336940] ? get_unmapped_area+0x1f5/0x3f0 [ 34.337498] do_mmap+0x854/0xf00 [ 34.337943] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.338447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.339018] ksys_mmap_pgoff+0x3af/0x500 [ 34.339528] do_syscall_64+0x3f/0x90 [ 34.340017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.340680] RIP: 0033:0x7f3400803d82 [ 34.341145] 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 [ 34.343286] RSP: 002b:00007ffd6d4ab1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.344204] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3400803d82 [ 34.345063] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33ffc3d000 [ 34.345906] RBP: 00007f33ffc3d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.346771] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb0cc23f70 [ 34.347629] R13: 00007ffd6d4ab1c0 R14: 00007ffd6d4ab1f0 R15: 00007ffd6d4ab550 [ 34.348493] [ 34.348792] [ 34.349007] Allocated by task 212: [ 34.349436] kasan_save_stack+0x22/0x50 [ 34.349946] kasan_set_track+0x25/0x30 [ 34.350451] __kasan_slab_alloc+0x59/0x70 [ 34.350978] kmem_cache_alloc+0x16b/0x370 [ 34.351495] vm_area_dup+0x20/0x160 [ 34.351954] __split_vma+0x170/0x950 [ 34.352432] split_vma+0xc6/0x110 [ 34.352878] mprotect_fixup+0x8d2/0xb30 [ 34.353387] do_mprotect_pkey+0x87e/0xd40 [ 34.353921] __x64_sys_mprotect+0x78/0xc0 [ 34.354462] do_syscall_64+0x3f/0x90 [ 34.354937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.355586] [ 34.355800] Freed by task 212: [ 34.356203] kasan_save_stack+0x22/0x50 [ 34.356716] kasan_set_track+0x25/0x30 [ 34.357214] kasan_save_free_info+0x2b/0x50 [ 34.357750] __kasan_slab_free+0x10a/0x190 [ 34.358294] kmem_cache_free+0x10d/0x4d0 [ 34.358852] rcu_core+0x8c8/0x2860 [ 34.359301] __do_softirq+0x1b7/0x7d4 [ 34.359781] [ 34.360001] Last potentially related work creation: [ 34.360595] kasan_save_stack+0x22/0x50 [ 34.361104] __kasan_record_aux_stack+0x8e/0xa0 [ 34.361680] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.362441] remove_vma+0x139/0x170 [ 34.362904] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.363469] do_vmi_munmap+0x1f1/0x2b0 [ 34.363958] __vm_munmap+0x138/0x3a0 [ 34.364421] __x64_sys_munmap+0x59/0x80 [ 34.364917] do_syscall_64+0x3f/0x90 [ 34.365392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.366042] [ 34.366264] The buggy address belongs to the object at ffff88800defc1d0 [ 34.366264] which belongs to the cache vm_area_struct of size 168 [ 34.367748] The buggy address is located 88 bytes inside of [ 34.367748] freed 168-byte region [ffff88800defc1d0, ffff88800defc278) [ 34.369167] [ 34.369382] The buggy address belongs to the physical page: [ 34.370045] page:00000000c41cb5b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdefc [ 34.371148] memcg:ffff88800e28e801 [ 34.371581] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.372228] page_type: 0xffffffff() [ 34.372694] raw: 0100000000000200 ffff88800879fc80 ffffea00003bc640 dead000000000004 [ 34.373614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28e801 [ 34.374542] page dumped because: kasan: bad access detected [ 34.375200] [ 34.375419] Memory state around the buggy address: [ 34.376001] ffff88800defc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.376865] ffff88800defc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.377730] >ffff88800defc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.378613] ^ [ 34.379171] ffff88800defc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.380032] ffff88800defc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.380883] ================================================================== [ 34.381813] Disabling lock debugging due to kernel taint [ 36.599564] BUG: Bad rss-counter state mm:000000001a5025a7 type:MM_FILEPAGES val:33 [ 36.600858] BUG: Bad rss-counter state mm:000000001a5025a7 type:MM_ANONPAGES val:22 [ 37.115248] BUG: Bad rss-counter state mm:000000008c222cc6 type:MM_FILEPAGES val:33 [ 37.116414] BUG: Bad rss-counter state mm:000000008c222cc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45729' (ECDSA) to the list of known hosts. 2023/06/19 11:23:19 fuzzer started 2023/06/19 11:23:19 dialing manager at localhost:44161 2023/06/19 11:23:19 checking machine... 2023/06/19 11:23:19 checking revisions... [ 37.777933] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:19 testing simple program... [ 37.834459] cgroup: Unknown subsys name 'net' [ 37.888573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801aa40870 RCX=ffff88800879fc80 RDX=ffffea00006a8f80 RSI=ffff88801aa40798 RDI=ffff88800879fdc0 RBP=0000000000000000 RSP=ffff88800d9cf808 R8 =ffff88801aa3e9f8 R9 =0000000000000000 R10=ffffea00006a9000 R11=0000000080120008 R12=dffffc0000000000 R13=ffff88800d9cf848 R14=ffff88800879fc80 R15=ffff88801aa40798 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f520cadf900 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=00007f520bf44d30 CR3=00000000101a4000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=305685862cc9910100000000000ae988 XMM05=794387a3a18618200000000000134df8 XMM06=dfcdbad4f1609c370000000000133bd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e5c52e0 RBX=ffff88800dd97198 RCX=1ffff11001c4d814 RDX=dffffc0000000000 RSI=ffff88800e5e1728 RDI=ffff88800dd971c8 RBP=ffff88800e26c070 RSP=ffff888014687848 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e5e1640 R13=0000000000000000 R14=ffff88800f16dd58 R15=ffff88800f16dd10 RIP=ffffffff81847508 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 00007f158edae900 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=00007f158f363650 CR3=00000000101c4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000