syzkaller login: [ 30.070525] BUG: Bad rss-counter state mm:0000000077af3139 type:MM_FILEPAGES val:33 [ 30.072327] BUG: Bad rss-counter state mm:0000000077af3139 type:MM_ANONPAGES val:22 [ 30.224606] ================================================================== [ 30.225477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.226362] Read of size 8 at addr ffff888015a1dd08 by task sshd/220 [ 30.227081] [ 30.227296] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.228228] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.229210] Call Trace: [ 30.229539] [ 30.229809] dump_stack_lvl+0x91/0xf0 [ 30.230279] print_report+0xcc/0x620 [ 30.230759] ? __virt_addr_valid+0x102/0x340 [ 30.231281] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.232472] kasan_report+0xbe/0xf0 [ 30.232954] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.233557] vma_interval_tree_remove+0xc75/0xec0 [ 30.234125] vma_prepare+0xc54/0x11a0 [ 30.234593] __split_vma+0x5af/0x950 [ 30.235039] ? __pfx___split_vma+0x10/0x10 [ 30.235560] ? find_held_lock+0x2c/0x110 [ 30.236054] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.236601] ? lock_is_held_type+0x9f/0x120 [ 30.237131] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.237732] ? mtree_range_walk+0x632/0x900 [ 30.238275] ? mas_walk+0x5c7/0x7c0 [ 30.238766] do_vmi_munmap+0x1f1/0x2b0 [ 30.239252] mmap_region+0x1f9/0x2660 [ 30.239749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.240253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.241003] ? __pfx_lock_acquire+0x10/0x10 [ 30.241539] ? __pfx_mmap_region+0x10/0x10 [ 30.242074] ? security_mmap_addr+0x7d/0xa0 [ 30.242596] ? get_unmapped_area+0x1f5/0x3f0 [ 30.243162] do_mmap+0x854/0xf00 [ 30.243598] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.244161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.244917] ksys_mmap_pgoff+0x3af/0x500 [ 30.245615] do_syscall_64+0x3f/0x90 [ 30.246272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.247163] RIP: 0033:0x7faaa51b9d82 [ 30.247805] 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 [ 30.250749] RSP: 002b:00007fff47c4cc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.252011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaa51b9d82 [ 30.253187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaa45f3000 [ 30.254354] RBP: 00007faaa45f3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.255513] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d649dbec0 [ 30.256718] R13: 00007fff47c4cc40 R14: 00007fff47c4cc70 R15: 00007fff47c4cfd0 [ 30.257895] [ 30.258298] [ 30.258592] Allocated by task 213: [ 30.259179] kasan_save_stack+0x22/0x50 [ 30.259885] kasan_set_track+0x25/0x30 [ 30.260561] __kasan_slab_alloc+0x59/0x70 [ 30.261289] kmem_cache_alloc+0x16b/0x370 [ 30.261999] vm_area_dup+0x20/0x160 [ 30.262625] __split_vma+0x170/0x950 [ 30.263263] split_vma+0xc6/0x110 [ 30.263858] mprotect_fixup+0x8d2/0xb30 [ 30.264483] do_mprotect_pkey+0x87e/0xd40 [ 30.265197] __x64_sys_mprotect+0x78/0xc0 [ 30.265878] do_syscall_64+0x3f/0x90 [ 30.266475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267274] [ 30.267541] Freed by task 213: [ 30.268049] kasan_save_stack+0x22/0x50 [ 30.268694] kasan_set_track+0x25/0x30 [ 30.269300] kasan_save_free_info+0x2b/0x50 [ 30.269953] __kasan_slab_free+0x10a/0x190 [ 30.270617] kmem_cache_free+0x10d/0x4d0 [ 30.271247] rcu_core+0x8c8/0x2860 [ 30.271798] __do_softirq+0x1b7/0x7d4 [ 30.272411] [ 30.272702] Last potentially related work creation: [ 30.273451] kasan_save_stack+0x22/0x50 [ 30.274097] __kasan_record_aux_stack+0x8e/0xa0 [ 30.274828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.275670] remove_vma+0x139/0x170 [ 30.276253] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.277004] do_vmi_munmap+0x1f1/0x2b0 [ 30.277627] __vm_munmap+0x138/0x3a0 [ 30.278224] __x64_sys_munmap+0x59/0x80 [ 30.278873] do_syscall_64+0x3f/0x90 [ 30.279479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.280292] [ 30.280548] The buggy address belongs to the object at ffff888015a1dcb0 [ 30.280548] which belongs to the cache vm_area_struct of size 168 [ 30.282125] The buggy address is located 88 bytes inside of [ 30.282125] freed 168-byte region [ffff888015a1dcb0, ffff888015a1dd58) [ 30.283571] [ 30.283788] The buggy address belongs to the physical page: [ 30.284460] page:00000000dfa4e801 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a1d [ 30.285592] memcg:ffff8880100b0701 [ 30.286031] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.286695] page_type: 0xffffffff() [ 30.287162] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.288085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100b0701 [ 30.289037] page dumped because: kasan: bad access detected [ 30.289709] [ 30.289924] Memory state around the buggy address: [ 30.290523] ffff888015a1dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.291387] ffff888015a1dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.292257] >ffff888015a1dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.293126] ^ [ 30.293583] ffff888015a1dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.294458] ffff888015a1de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.295321] ================================================================== [ 30.296342] Disabling lock debugging due to kernel taint [ 32.556341] BUG: Bad rss-counter state mm:00000000bd875457 type:MM_FILEPAGES val:33 [ 32.557520] BUG: Bad rss-counter state mm:00000000bd875457 type:MM_ANONPAGES val:22 [ 33.016512] BUG: Bad rss-counter state mm:00000000e6675375 type:MM_FILEPAGES val:33 [ 33.017688] BUG: Bad rss-counter state mm:00000000e6675375 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61167' (ECDSA) to the list of known hosts. 2023/06/20 20:45:02 fuzzer started 2023/06/20 20:45:02 dialing manager at localhost:36067 2023/06/20 20:45:02 checking machine... 2023/06/20 20:45:02 checking revisions... [ 33.602801] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:45:03 testing simple program... [ 33.646716] cgroup: Unknown subsys name 'net' [ 33.686695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:45:02 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007ffad045f900 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=00007f26df03d650 CR3=000000000d9ae000 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=efc160325ad4e6ad084f78158ad387b9 XMM02=ec2efd57dc4c00df000000000011be00 XMM03=10357846e9114327000000000011bed0 XMM04=74d49b7c590335cb00000000000ae988 XMM05=56fff45cd5e913980000000000133ed8 XMM06=8d6672d5708eadb90000000000132c78 XMM07=fb795ef6d65770560000000000122cb0 XMM08=2c67c8bc2e329bc3000000000011be70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fff2f9adea8 CR3=0000000019dc8000 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=2032303a35343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000