syzkaller login: [ 30.874271] BUG: Bad rss-counter state mm:0000000063bc15d6 type:MM_FILEPAGES val:33 [ 30.875520] BUG: Bad rss-counter state mm:0000000063bc15d6 type:MM_ANONPAGES val:22 [ 31.030438] ================================================================== [ 31.031365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.032314] Read of size 8 at addr ffff88800f31fd08 by task sshd/220 [ 31.033089] [ 31.033308] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.034370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.035376] Call Trace: [ 31.035706] [ 31.036138] dump_stack_lvl+0x91/0xf0 [ 31.036730] print_report+0xcc/0x620 [ 31.037307] ? __virt_addr_valid+0x102/0x340 [ 31.037967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.038721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.039461] kasan_report+0xbe/0xf0 [ 31.040029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.040791] vma_interval_tree_remove+0xc75/0xec0 [ 31.041533] vma_prepare+0xc54/0x11a0 [ 31.042116] __split_vma+0x5af/0x950 [ 31.042710] ? __pfx___split_vma+0x10/0x10 [ 31.043352] ? find_held_lock+0x2c/0x110 [ 31.043984] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.044682] ? lock_is_held_type+0x9f/0x120 [ 31.045341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.046090] ? mtree_range_walk+0x632/0x900 [ 31.046796] ? mas_walk+0x5c7/0x7c0 [ 31.047326] do_vmi_munmap+0x1f1/0x2b0 [ 31.047821] mmap_region+0x1f9/0x2660 [ 31.048314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.048834] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.049555] ? __pfx_lock_acquire+0x10/0x10 [ 31.050091] ? __pfx_mmap_region+0x10/0x10 [ 31.050641] ? security_mmap_addr+0x7d/0xa0 [ 31.051171] ? get_unmapped_area+0x1f5/0x3f0 [ 31.051726] do_mmap+0x854/0xf00 [ 31.052179] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.052677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.053239] ksys_mmap_pgoff+0x3af/0x500 [ 31.053745] do_syscall_64+0x3f/0x90 [ 31.054248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.054893] RIP: 0033:0x7fbb6816fd82 [ 31.055350] 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 [ 31.057469] RSP: 002b:00007fff500cb518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.058380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb6816fd82 [ 31.059235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb675a9000 [ 31.060080] RBP: 00007fbb675a9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.060931] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a99d4dd90 [ 31.061780] R13: 00007fff500cb530 R14: 00007fff500cb560 R15: 00007fff500cb8c0 [ 31.062655] [ 31.062946] [ 31.063161] Allocated by task 213: [ 31.063590] kasan_save_stack+0x22/0x50 [ 31.064092] kasan_set_track+0x25/0x30 [ 31.064587] __kasan_slab_alloc+0x59/0x70 [ 31.065112] kmem_cache_alloc+0x16b/0x370 [ 31.065627] vm_area_dup+0x20/0x160 [ 31.066083] __split_vma+0x170/0x950 [ 31.066578] split_vma+0xc6/0x110 [ 31.067024] mprotect_fixup+0x8d2/0xb30 [ 31.067526] do_mprotect_pkey+0x87e/0xd40 [ 31.068058] __x64_sys_mprotect+0x78/0xc0 [ 31.068584] do_syscall_64+0x3f/0x90 [ 31.069068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.069719] [ 31.069938] Freed by task 213: [ 31.070348] kasan_save_stack+0x22/0x50 [ 31.070859] kasan_set_track+0x25/0x30 [ 31.071364] kasan_save_free_info+0x2b/0x50 [ 31.071910] __kasan_slab_free+0x10a/0x190 [ 31.072447] kmem_cache_free+0x10d/0x4d0 [ 31.072957] rcu_core+0x8c8/0x2860 [ 31.073412] __do_softirq+0x1b7/0x7d4 [ 31.073891] [ 31.074108] Last potentially related work creation: [ 31.074713] kasan_save_stack+0x22/0x50 [ 31.075225] __kasan_record_aux_stack+0x8e/0xa0 [ 31.075804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.076460] remove_vma+0x139/0x170 [ 31.076911] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.077478] do_vmi_munmap+0x1f1/0x2b0 [ 31.077975] __vm_munmap+0x138/0x3a0 [ 31.078455] __x64_sys_munmap+0x59/0x80 [ 31.078956] do_syscall_64+0x3f/0x90 [ 31.079434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080078] [ 31.080292] Second to last potentially related work creation: [ 31.080981] kasan_save_stack+0x22/0x50 [ 31.081491] __kasan_record_aux_stack+0x8e/0xa0 [ 31.082078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.082775] remove_vma+0x139/0x170 [ 31.083260] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.083848] do_vmi_munmap+0x1f1/0x2b0 [ 31.084365] mmap_region+0x1f9/0x2660 [ 31.084873] do_mmap+0x854/0xf00 [ 31.085331] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.085853] ksys_mmap_pgoff+0x3af/0x500 [ 31.086404] do_syscall_64+0x3f/0x90 [ 31.086915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.087607] [ 31.087834] The buggy address belongs to the object at ffff88800f31fcb0 [ 31.087834] which belongs to the cache vm_area_struct of size 168 [ 31.089390] The buggy address is located 88 bytes inside of [ 31.089390] freed 168-byte region [ffff88800f31fcb0, ffff88800f31fd58) [ 31.090891] [ 31.091114] The buggy address belongs to the physical page: [ 31.091813] page:000000003c3ceb28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf31f [ 31.092978] memcg:ffff88800fdaae01 [ 31.093440] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.094129] page_type: 0xffffffff() [ 31.094623] raw: 0100000000000200 ffff8880087a0c80 ffffea000063bf00 000000000000000a [ 31.095598] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdaae01 [ 31.096569] page dumped because: kasan: bad access detected [ 31.097272] [ 31.097498] Memory state around the buggy address: [ 31.098122] ffff88800f31fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.099040] ffff88800f31fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.099945] >ffff88800f31fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.100845] ^ [ 31.101313] ffff88800f31fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.102231] ffff88800f31fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.103137] ================================================================== [ 31.104407] Disabling lock debugging due to kernel taint [ 33.665773] BUG: Bad rss-counter state mm:000000009034c8aa type:MM_FILEPAGES val:33 [ 33.666993] BUG: Bad rss-counter state mm:000000009034c8aa type:MM_ANONPAGES val:22 [ 34.138624] BUG: Bad rss-counter state mm:00000000f4c1de29 type:MM_FILEPAGES val:33 [ 34.139792] BUG: Bad rss-counter state mm:00000000f4c1de29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39352' (ECDSA) to the list of known hosts. 2023/06/20 16:31:15 fuzzer started 2023/06/20 16:31:15 dialing manager at localhost:36067 2023/06/20 16:31:15 checking machine... 2023/06/20 16:31:15 checking revisions... [ 34.767608] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:31:15 testing simple program... [ 34.817396] cgroup: Unknown subsys name 'net' [ 34.875888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:31:15 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff866212df RCX=0000000080000101 RDX=ffffffff8542a6c0 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801457e540 RIP=ffffffff814c0871 RFL=00000297 [--S-APC] 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 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=00007ffd671b8718 CR3=000000000dfe4000 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=2035313a31333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31333a3631203032 XMM08=5f6d65747379733a755f6d6574737973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000024 RDI=ffff888009f8de00 RBP=0000000000000024 RSP=ffff888019e07a60 R8 =0000000000000007 R9 =000000007fffffff R10=0000000000000024 R11=0000000000000000 R12=ffff888009f8de00 R13=ffff888019e07d90 R14=ffff888019e07d90 R15=ffff888018f9da00 RIP=ffffffff8184ce10 RFL=00000293 [--S-A-C] 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 00007fd42e7d8900 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=00007ffda2102000 CR3=000000000e53a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000