syzkaller login: [ 43.179540] BUG: Bad rss-counter state mm:0000000019f69ca6 type:MM_FILEPAGES val:33 [ 43.180611] BUG: Bad rss-counter state mm:0000000019f69ca6 type:MM_ANONPAGES val:22 [ 43.347709] ================================================================== [ 43.348603] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.349523] Read of size 8 at addr ffff888010079c20 by task sshd/220 [ 43.350283] [ 43.350501] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.351552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.352511] Call Trace: [ 43.352826] [ 43.353109] dump_stack_lvl+0x91/0xf0 [ 43.353614] print_report+0xcc/0x620 [ 43.354089] ? __virt_addr_valid+0x102/0x340 [ 43.354627] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.355236] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.355862] kasan_report+0xbe/0xf0 [ 43.356335] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.356949] vma_interval_tree_remove+0xc75/0xec0 [ 43.357537] vma_prepare+0xc54/0x11a0 [ 43.358015] __split_vma+0x5af/0x950 [ 43.358479] ? __pfx___split_vma+0x10/0x10 [ 43.359003] ? find_held_lock+0x2c/0x110 [ 43.359548] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.360107] ? lock_is_held_type+0x9f/0x120 [ 43.360635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.361246] ? mtree_range_walk+0x632/0x900 [ 43.361786] ? mas_walk+0x5c7/0x7c0 [ 43.362256] do_vmi_munmap+0x1f1/0x2b0 [ 43.362738] mmap_region+0x1f9/0x2660 [ 43.363214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.363760] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.364468] ? __pfx_lock_acquire+0x10/0x10 [ 43.364998] ? __pfx_mmap_region+0x10/0x10 [ 43.365521] ? security_mmap_addr+0x7d/0xa0 [ 43.366062] ? get_unmapped_area+0x1f5/0x3f0 [ 43.366601] do_mmap+0x854/0xf00 [ 43.367034] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.367531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.368085] ksys_mmap_pgoff+0x3af/0x500 [ 43.368584] do_syscall_64+0x3f/0x90 [ 43.369055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.369689] RIP: 0033:0x7efe09979d82 [ 43.370137] 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 [ 43.372234] RSP: 002b:00007ffe2aed4bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.373126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe09979d82 [ 43.373954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe08db3000 [ 43.374786] RBP: 00007efe08db3000 R08: 0000000000000009 R09: 0000000000001000 [ 43.375649] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563306f98d90 [ 43.376509] R13: 00007ffe2aed4be0 R14: 00007ffe2aed4c10 R15: 00007ffe2aed4f70 [ 43.377372] [ 43.377662] [ 43.377880] Allocated by task 213: [ 43.378320] kasan_save_stack+0x22/0x50 [ 43.378815] kasan_set_track+0x25/0x30 [ 43.379304] __kasan_slab_alloc+0x59/0x70 [ 43.379830] kmem_cache_alloc+0x16b/0x370 [ 43.380360] vm_area_dup+0x20/0x160 [ 43.380816] __split_vma+0x170/0x950 [ 43.381276] split_vma+0xc6/0x110 [ 43.381708] mprotect_fixup+0x8d2/0xb30 [ 43.382206] do_mprotect_pkey+0x87e/0xd40 [ 43.382724] __x64_sys_mprotect+0x78/0xc0 [ 43.383243] do_syscall_64+0x3f/0x90 [ 43.383718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.384361] [ 43.384575] Freed by task 213: [ 43.384977] kasan_save_stack+0x22/0x50 [ 43.385471] kasan_set_track+0x25/0x30 [ 43.385964] kasan_save_free_info+0x2b/0x50 [ 43.386489] __kasan_slab_free+0x10a/0x190 [ 43.387020] kmem_cache_free+0x10d/0x4d0 [ 43.387536] rcu_core+0x8c8/0x2860 [ 43.387977] __do_softirq+0x1b7/0x7d4 [ 43.388457] [ 43.388671] Last potentially related work creation: [ 43.389262] kasan_save_stack+0x22/0x50 [ 43.389762] __kasan_record_aux_stack+0x8e/0xa0 [ 43.390343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.390982] remove_vma+0x139/0x170 [ 43.391439] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.391991] do_vmi_munmap+0x1f1/0x2b0 [ 43.392569] __vm_munmap+0x138/0x3a0 [ 43.393040] __x64_sys_munmap+0x59/0x80 [ 43.393539] do_syscall_64+0x3f/0x90 [ 43.394005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.394641] [ 43.394852] Second to last potentially related work creation: [ 43.395541] kasan_save_stack+0x22/0x50 [ 43.396045] __kasan_record_aux_stack+0x8e/0xa0 [ 43.396626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.397261] remove_vma+0x139/0x170 [ 43.397704] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.398257] do_vmi_munmap+0x1f1/0x2b0 [ 43.398738] mmap_region+0x1f9/0x2660 [ 43.399206] do_mmap+0x854/0xf00 [ 43.399639] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.400119] ksys_mmap_pgoff+0x3af/0x500 [ 43.400614] do_syscall_64+0x3f/0x90 [ 43.401088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.401726] [ 43.401943] The buggy address belongs to the object at ffff888010079bc8 [ 43.401943] which belongs to the cache vm_area_struct of size 168 [ 43.403399] The buggy address is located 88 bytes inside of [ 43.403399] freed 168-byte region [ffff888010079bc8, ffff888010079c70) [ 43.404811] [ 43.405025] The buggy address belongs to the physical page: [ 43.405683] page:000000009f5b6173 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10079 [ 43.406774] memcg:ffff88800f424b01 [ 43.407211] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.407914] page_type: 0xffffffff() [ 43.408366] raw: 0100000000000200 ffff88800879fc80 ffffea0000317480 dead000000000007 [ 43.409277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f424b01 [ 43.410178] page dumped because: kasan: bad access detected [ 43.410829] [ 43.411042] Memory state around the buggy address: [ 43.411622] ffff888010079b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.412474] ffff888010079b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.413316] >ffff888010079c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.414158] ^ [ 43.414683] ffff888010079c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 43.415549] ffff888010079d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 43.416391] ================================================================== [ 43.417308] Disabling lock debugging due to kernel taint [ 45.995039] BUG: Bad rss-counter state mm:000000006b1b636f type:MM_FILEPAGES val:33 [ 45.996254] BUG: Bad rss-counter state mm:000000006b1b636f type:MM_ANONPAGES val:22 [ 46.434724] BUG: Bad rss-counter state mm:00000000304b9a95 type:MM_FILEPAGES val:33 [ 46.435437] BUG: Bad rss-counter state mm:00000000304b9a95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33522' (ECDSA) to the list of known hosts. 2023/06/19 14:16:32 fuzzer started 2023/06/19 14:16:32 dialing manager at localhost:44161 2023/06/19 14:16:32 checking machine... 2023/06/19 14:16:32 checking revisions... [ 47.157739] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:16:32 testing simple program... [ 47.217551] cgroup: Unknown subsys name 'net' [ 47.280593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:16:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801806f320 RCX=0000000000000001 RDX=1ffff1100300de75 RSI=ffffffff81807ebb RDI=ffff88801806f32c RBP=ffff88801806f3a8 RSP=ffff88801806f238 R8 =0000000000000001 R9 =ffff88801806f298 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801806f320 R13=0000000000000000 R14=ffff8880168a0000 R15=00000000000928c0 RIP=ffffffff813ad4f7 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 00007f6a9d44f900 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=00007ffdc82ff000 CR3=000000000fffe000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f0f47501750 CR3=000000000f01a000 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=cdac127e68378d9c2e46aeb6e76b3758 XMM02=000000000011fdd0ec2efd57dc4c00df XMM03=0000000000125108943d9e6a3eff808d XMM04=9c298446d45914be00000000000ae988 XMM05=19e9129bd510f2350000000000135c80 XMM06=9be0adf5df7cef7d0000000000134e58 XMM07=e042d86d42eb936e0000000000125af0 XMM08=943d9e6a3eff808d000000000011fe30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000