syzkaller login: [ 31.160854] BUG: Bad rss-counter state mm:000000009932f92c type:MM_FILEPAGES val:33 [ 31.162345] BUG: Bad rss-counter state mm:000000009932f92c type:MM_ANONPAGES val:22 [ 31.335649] ================================================================== [ 31.336647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.337676] Read of size 8 at addr ffff8880169c5c20 by task sshd/219 [ 31.338607] [ 31.338854] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.339789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.340866] Call Trace: [ 31.341212] [ 31.341525] dump_stack_lvl+0x91/0xf0 [ 31.342067] print_report+0xcc/0x620 [ 31.342598] ? __virt_addr_valid+0x102/0x340 [ 31.343256] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.343932] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.344609] kasan_report+0xbe/0xf0 [ 31.345128] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.345809] vma_interval_tree_remove+0xc75/0xec0 [ 31.346476] vma_prepare+0xc54/0x11a0 [ 31.347012] __split_vma+0x5af/0x950 [ 31.347528] ? __pfx___split_vma+0x10/0x10 [ 31.348108] ? find_held_lock+0x2c/0x110 [ 31.348685] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.349307] ? lock_is_held_type+0x9f/0x120 [ 31.349896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.350555] ? mtree_range_walk+0x632/0x900 [ 31.351174] ? mas_walk+0x5c7/0x7c0 [ 31.351695] do_vmi_munmap+0x1f1/0x2b0 [ 31.352231] mmap_region+0x1f9/0x2660 [ 31.352760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.353316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.354100] ? __pfx_lock_acquire+0x10/0x10 [ 31.354683] ? __pfx_mmap_region+0x10/0x10 [ 31.355276] ? security_mmap_addr+0x7d/0xa0 [ 31.355865] ? get_unmapped_area+0x1f5/0x3f0 [ 31.356464] do_mmap+0x854/0xf00 [ 31.356943] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.357477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.358097] ksys_mmap_pgoff+0x3af/0x500 [ 31.358651] do_syscall_64+0x3f/0x90 [ 31.359192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.359905] RIP: 0033:0x7f33c8b83d82 [ 31.360404] 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 [ 31.362734] RSP: 002b:00007fff018d7208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.363738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33c8b83d82 [ 31.364665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33c7fbd000 [ 31.365594] RBP: 00007f33c7fbd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.366525] R10: 0000000000000812 R11: 0000000000000206 R12: 000055587efe2b20 [ 31.367470] R13: 00007fff018d7220 R14: 00007fff018d7250 R15: 00007fff018d75b0 [ 31.368407] [ 31.368728] [ 31.368960] Allocated by task 212: [ 31.369427] kasan_save_stack+0x22/0x50 [ 31.369979] kasan_set_track+0x25/0x30 [ 31.370523] __kasan_slab_alloc+0x59/0x70 [ 31.371113] kmem_cache_alloc+0x16b/0x370 [ 31.371683] vm_area_dup+0x20/0x160 [ 31.372177] __split_vma+0x170/0x950 [ 31.372673] split_vma+0xc6/0x110 [ 31.373148] mprotect_fixup+0x8d2/0xb30 [ 31.373682] do_mprotect_pkey+0x87e/0xd40 [ 31.374240] __x64_sys_mprotect+0x78/0xc0 [ 31.374796] do_syscall_64+0x3f/0x90 [ 31.375310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375996] [ 31.376227] Freed by task 212: [ 31.376645] kasan_save_stack+0x22/0x50 [ 31.377189] kasan_set_track+0x25/0x30 [ 31.377726] kasan_save_free_info+0x2b/0x50 [ 31.378286] __kasan_slab_free+0x10a/0x190 [ 31.378874] kmem_cache_free+0x10d/0x4d0 [ 31.379416] rcu_core+0x8c8/0x2860 [ 31.379897] __do_softirq+0x1b7/0x7d4 [ 31.380416] [ 31.380649] Last potentially related work creation: [ 31.381279] kasan_save_stack+0x22/0x50 [ 31.381830] __kasan_record_aux_stack+0x8e/0xa0 [ 31.382445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.383153] remove_vma+0x139/0x170 [ 31.383641] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.384245] do_vmi_munmap+0x1f1/0x2b0 [ 31.384781] __vm_munmap+0x138/0x3a0 [ 31.385288] __x64_sys_munmap+0x59/0x80 [ 31.385829] do_syscall_64+0x3f/0x90 [ 31.386341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387063] [ 31.387299] The buggy address belongs to the object at ffff8880169c5bc8 [ 31.387299] which belongs to the cache vm_area_struct of size 168 [ 31.388900] The buggy address is located 88 bytes inside of [ 31.388900] freed 168-byte region [ffff8880169c5bc8, ffff8880169c5c70) [ 31.390437] [ 31.390672] The buggy address belongs to the physical page: [ 31.391390] page:0000000028fc458a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169c5 [ 31.392580] memcg:ffff88800f179e01 [ 31.393050] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.393813] page_type: 0xffffffff() [ 31.394308] raw: 0100000000000200 ffff8880087a0c80 ffffea0000314400 dead000000000007 [ 31.395319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f179e01 [ 31.396311] page dumped because: kasan: bad access detected [ 31.397030] [ 31.397264] Memory state around the buggy address: [ 31.397902] ffff8880169c5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.398845] ffff8880169c5b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.399775] >ffff8880169c5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.400703] ^ [ 31.401286] ffff8880169c5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.402230] ffff8880169c5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.403167] ================================================================== [ 31.404281] Disabling lock debugging due to kernel taint [ 33.296307] BUG: Bad rss-counter state mm:00000000d1c8e513 type:MM_FILEPAGES val:33 [ 33.297594] BUG: Bad rss-counter state mm:00000000d1c8e513 type:MM_ANONPAGES val:22 [ 33.778830] BUG: Bad rss-counter state mm:00000000bc4bec01 type:MM_FILEPAGES val:33 [ 33.780088] BUG: Bad rss-counter state mm:00000000bc4bec01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1391' (ECDSA) to the list of known hosts. 2023/06/20 12:30:37 fuzzer started 2023/06/20 12:30:37 dialing manager at localhost:36067 2023/06/20 12:30:37 checking machine... 2023/06/20 12:30:37 checking revisions... [ 34.476789] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:30:37 testing simple program... [ 34.520316] cgroup: Unknown subsys name 'net' [ 34.563321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:30:37 Registers: info registers vcpu 0 RAX=ffffffff83861243 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001f90f3f RSI=ffffffff83861243 RDI=ffff88800fc87a68 RBP=ffff88800fc87a38 RSP=ffff88800fc87998 R8 =0000000000000001 R9 =ffff88800fc879e0 R10=0000000000038001 R11=000000000008b06b R12=ffff88800fc87a68 R13=0000000000000000 R14=ffff888015a551c0 R15=ffff88800e71f4c0 RIP=ffffffff813ad470 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 00007f1567d9c900 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=00007ffc09d31000 CR3=000000001ce9a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f65c3f121a0 CR3=000000000e058000 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=2037333a30333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000