syzkaller login: [ 31.713924] BUG: Bad rss-counter state mm:000000005ccb40ae type:MM_FILEPAGES val:33 [ 31.715391] BUG: Bad rss-counter state mm:000000005ccb40ae type:MM_ANONPAGES val:22 [ 31.874213] ================================================================== [ 31.875185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.876148] Read of size 8 at addr ffff8880164b4a50 by task sshd/220 [ 31.877033] [ 31.877255] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.878136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.879133] Call Trace: [ 31.879459] [ 31.879749] dump_stack_lvl+0x91/0xf0 [ 31.880239] print_report+0xcc/0x620 [ 31.880722] ? __virt_addr_valid+0x102/0x340 [ 31.881284] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.881911] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.882540] kasan_report+0xbe/0xf0 [ 31.883019] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.883645] vma_interval_tree_remove+0xc75/0xec0 [ 31.884251] vma_prepare+0xc54/0x11a0 [ 31.884742] __split_vma+0x5af/0x950 [ 31.885233] ? __pfx___split_vma+0x10/0x10 [ 31.885799] ? find_held_lock+0x2c/0x110 [ 31.886342] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.886914] ? lock_is_held_type+0x9f/0x120 [ 31.887461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.888078] ? mtree_range_walk+0x632/0x900 [ 31.888638] ? mas_walk+0x5c7/0x7c0 [ 31.889125] do_vmi_munmap+0x1f1/0x2b0 [ 31.889618] mmap_region+0x1f9/0x2660 [ 31.890107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.890622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.891340] ? __pfx_lock_acquire+0x10/0x10 [ 31.891879] ? __pfx_mmap_region+0x10/0x10 [ 31.892411] ? security_mmap_addr+0x7d/0xa0 [ 31.892978] ? get_unmapped_area+0x1f5/0x3f0 [ 31.893556] do_mmap+0x854/0xf00 [ 31.894010] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.894511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.895074] ksys_mmap_pgoff+0x3af/0x500 [ 31.895611] do_syscall_64+0x3f/0x90 [ 31.896107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.896764] RIP: 0033:0x7f4a83f44d82 [ 31.897247] 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 [ 31.899495] RSP: 002b:00007ffdfa536c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.900436] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a83f44d82 [ 31.901308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a8337e000 [ 31.902200] RBP: 00007f4a8337e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.903087] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4b6833b20 [ 31.903965] R13: 00007ffdfa536c40 R14: 00007ffdfa536c70 R15: 00007ffdfa536fd0 [ 31.904844] [ 31.905146] [ 31.905372] Allocated by task 213: [ 31.905821] kasan_save_stack+0x22/0x50 [ 31.906352] kasan_set_track+0x25/0x30 [ 31.906863] __kasan_slab_alloc+0x59/0x70 [ 31.907405] kmem_cache_alloc+0x16b/0x370 [ 31.907949] vm_area_dup+0x20/0x160 [ 31.908420] __split_vma+0x170/0x950 [ 31.908907] split_vma+0xc6/0x110 [ 31.909369] mprotect_fixup+0x8d2/0xb30 [ 31.909889] do_mprotect_pkey+0x87e/0xd40 [ 31.910449] __x64_sys_mprotect+0x78/0xc0 [ 31.911021] do_syscall_64+0x3f/0x90 [ 31.911530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912197] [ 31.912422] Freed by task 203: [ 31.912831] kasan_save_stack+0x22/0x50 [ 31.913355] kasan_set_track+0x25/0x30 [ 31.913874] kasan_save_free_info+0x2b/0x50 [ 31.914438] __kasan_slab_free+0x10a/0x190 [ 31.914997] kmem_cache_free+0x10d/0x4d0 [ 31.915531] rcu_core+0x8c8/0x2860 [ 31.915990] __do_softirq+0x1b7/0x7d4 [ 31.916486] [ 31.916709] Last potentially related work creation: [ 31.917313] kasan_save_stack+0x22/0x50 [ 31.917837] __kasan_record_aux_stack+0x8e/0xa0 [ 31.918455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.919119] remove_vma+0x139/0x170 [ 31.919617] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.920186] do_vmi_munmap+0x1f1/0x2b0 [ 31.920676] __vm_munmap+0x138/0x3a0 [ 31.921145] __x64_sys_munmap+0x59/0x80 [ 31.921641] do_syscall_64+0x3f/0x90 [ 31.922124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.922764] [ 31.922976] The buggy address belongs to the object at ffff8880164b49f8 [ 31.922976] which belongs to the cache vm_area_struct of size 168 [ 31.924468] The buggy address is located 88 bytes inside of [ 31.924468] freed 168-byte region [ffff8880164b49f8, ffff8880164b4aa0) [ 31.925879] [ 31.926109] The buggy address belongs to the physical page: [ 31.926778] page:000000000a316f7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164b4 [ 31.927885] memcg:ffff88800fbb9f01 [ 31.928317] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.929013] page_type: 0xffffffff() [ 31.929463] raw: 0100000000000200 ffff88800879fc80 ffffea000039a380 dead000000000007 [ 31.930395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbb9f01 [ 31.931297] page dumped because: kasan: bad access detected [ 31.931950] [ 31.932164] Memory state around the buggy address: [ 31.932744] ffff8880164b4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.933598] ffff8880164b4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.934473] >ffff8880164b4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.935327] ^ [ 31.936023] ffff8880164b4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.936877] ffff8880164b4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.937735] ================================================================== [ 31.938711] Disabling lock debugging due to kernel taint [ 33.925633] BUG: Bad rss-counter state mm:00000000c5b218e1 type:MM_FILEPAGES val:33 [ 33.926849] BUG: Bad rss-counter state mm:00000000c5b218e1 type:MM_ANONPAGES val:22 [ 34.386100] BUG: Bad rss-counter state mm:00000000e767c3e8 type:MM_FILEPAGES val:33 [ 34.387270] BUG: Bad rss-counter state mm:00000000e767c3e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46976' (ECDSA) to the list of known hosts. 2023/06/19 18:19:17 fuzzer started 2023/06/19 18:19:17 dialing manager at localhost:44161 2023/06/19 18:19:17 checking machine... 2023/06/19 18:19:17 checking revisions... [ 35.072148] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:19:18 testing simple program... [ 35.115458] cgroup: Unknown subsys name 'net' [ 35.170392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:16 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff88800fd37798 RDX=1ffff11001fa6eea RSI=ffffffff813ad6d0 RDI=ffff88800fd377c0 RBP=ffff88800fd37790 RSP=ffff88800fd376f0 R8 =0000000000000001 R9 =ffff88800fd37738 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fd377c0 R13=0000000000000000 R14=ffff88801a0751c0 R15=0000000000000dc0 RIP=ffffffff813ad424 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5a56df3900 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=00007f5a573ab0b0 CR3=000000001a254000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fffa3e14738 CR3=00000000143d0000 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=2037313a39313a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000