syzkaller login: [ 31.575533] BUG: Bad rss-counter state mm:00000000a91da8c2 type:MM_FILEPAGES val:33 [ 31.576862] BUG: Bad rss-counter state mm:00000000a91da8c2 type:MM_ANONPAGES val:22 [ 31.750595] ================================================================== [ 31.751854] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.753149] Read of size 8 at addr ffff8880183b8df0 by task sshd/221 [ 31.754237] [ 31.754536] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.755737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.757170] Call Trace: [ 31.757640] [ 31.758061] dump_stack_lvl+0x91/0xf0 [ 31.758774] print_report+0xcc/0x620 [ 31.759457] ? __virt_addr_valid+0x102/0x340 [ 31.760286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.761219] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.762144] kasan_report+0xbe/0xf0 [ 31.762819] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.763745] vma_interval_tree_remove+0xc75/0xec0 [ 31.764659] vma_prepare+0xc54/0x11a0 [ 31.765364] __split_vma+0x5af/0x950 [ 31.766074] ? __pfx___split_vma+0x10/0x10 [ 31.766848] ? find_held_lock+0x2c/0x110 [ 31.767573] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.768385] ? lock_is_held_type+0x9f/0x120 [ 31.769154] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.770032] ? mtree_range_walk+0x632/0x900 [ 31.770846] ? mas_walk+0x5c7/0x7c0 [ 31.771548] do_vmi_munmap+0x1f1/0x2b0 [ 31.772253] mmap_region+0x1f9/0x2660 [ 31.772940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.773686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.774754] ? __pfx_lock_acquire+0x10/0x10 [ 31.775541] ? __pfx_mmap_region+0x10/0x10 [ 31.776337] ? security_mmap_addr+0x7d/0xa0 [ 31.777087] ? get_unmapped_area+0x1f5/0x3f0 [ 31.777890] do_mmap+0x854/0xf00 [ 31.778540] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.779264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.780071] ksys_mmap_pgoff+0x3af/0x500 [ 31.780774] do_syscall_64+0x3f/0x90 [ 31.781434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782350] RIP: 0033:0x7feba19d9d82 [ 31.783021] 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 [ 31.786178] RSP: 002b:00007ffc1df8e568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.787561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feba19d9d82 [ 31.788858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feba0e13000 [ 31.790127] RBP: 00007feba0e13000 R08: 0000000000000009 R09: 0000000000001000 [ 31.791396] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d617be5f70 [ 31.792591] R13: 00007ffc1df8e580 R14: 00007ffc1df8e5b0 R15: 00007ffc1df8e910 [ 31.793835] [ 31.794251] [ 31.794560] Allocated by task 214: [ 31.795168] kasan_save_stack+0x22/0x50 [ 31.795922] kasan_set_track+0x25/0x30 [ 31.796628] __kasan_slab_alloc+0x59/0x70 [ 31.797395] kmem_cache_alloc+0x16b/0x370 [ 31.798133] vm_area_dup+0x20/0x160 [ 31.798775] __split_vma+0x170/0x950 [ 31.799443] split_vma+0xc6/0x110 [ 31.800103] mprotect_fixup+0x8d2/0xb30 [ 31.800821] do_mprotect_pkey+0x87e/0xd40 [ 31.801572] __x64_sys_mprotect+0x78/0xc0 [ 31.802309] do_syscall_64+0x3f/0x90 [ 31.802969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803881] [ 31.804184] Freed by task 214: [ 31.804718] kasan_save_stack+0x22/0x50 [ 31.805395] kasan_set_track+0x25/0x30 [ 31.806068] kasan_save_free_info+0x2b/0x50 [ 31.806799] __kasan_slab_free+0x10a/0x190 [ 31.807566] kmem_cache_free+0x10d/0x4d0 [ 31.808291] rcu_core+0x8c8/0x2860 [ 31.808950] __do_softirq+0x1b7/0x7d4 [ 31.809680] [ 31.810017] Last potentially related work creation: [ 31.810917] kasan_save_stack+0x22/0x50 [ 31.811682] __kasan_record_aux_stack+0x8e/0xa0 [ 31.812593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.813519] remove_vma+0x139/0x170 [ 31.814193] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.815031] do_vmi_munmap+0x1f1/0x2b0 [ 31.815734] __vm_munmap+0x138/0x3a0 [ 31.816377] __x64_sys_munmap+0x59/0x80 [ 31.817055] do_syscall_64+0x3f/0x90 [ 31.817722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818613] [ 31.818914] The buggy address belongs to the object at ffff8880183b8d98 [ 31.818914] which belongs to the cache vm_area_struct of size 168 [ 31.821047] The buggy address is located 88 bytes inside of [ 31.821047] freed 168-byte region [ffff8880183b8d98, ffff8880183b8e40) [ 31.823101] [ 31.823419] The buggy address belongs to the physical page: [ 31.824434] page:000000007e137c8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183b8 [ 31.825769] memcg:ffff8880183b6b01 [ 31.826288] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.827065] page_type: 0xffffffff() [ 31.827595] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.828707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183b6b01 [ 31.829770] page dumped because: kasan: bad access detected [ 31.830539] [ 31.830792] Memory state around the buggy address: [ 31.831472] ffff8880183b8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.832528] ffff8880183b8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.833517] >ffff8880183b8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.834496] ^ [ 31.835436] ffff8880183b8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.836453] ffff8880183b8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.837343] ================================================================== [ 31.838717] Disabling lock debugging due to kernel taint [ 33.683675] BUG: Bad rss-counter state mm:000000006d1e73c8 type:MM_FILEPAGES val:33 [ 33.684946] BUG: Bad rss-counter state mm:000000006d1e73c8 type:MM_ANONPAGES val:22 [ 34.061004] BUG: Bad rss-counter state mm:000000001a7c79c6 type:MM_FILEPAGES val:33 [ 34.062226] BUG: Bad rss-counter state mm:000000001a7c79c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62119' (ECDSA) to the list of known hosts. 2023/06/19 23:30:27 fuzzer started 2023/06/19 23:30:27 dialing manager at localhost:44161 2023/06/19 23:30:27 checking machine... 2023/06/19 23:30:27 checking revisions... [ 34.813778] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:30:27 testing simple program... [ 34.864578] cgroup: Unknown subsys name 'net' [ 34.907818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:26 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=00007f1c70fa6c64 RCX=0000000080000100 RDX=ffff88801463b680 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801463b680 R15=ffff88800ceb2c38 RIP=ffffffff814c07f1 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 00007f1c706ed900 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=00007fb12f8de650 CR3=000000000d6ac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e88590b5ede55b8900000000000ae988 XMM05=7c98e80225ec4bda0000000000135100 XMM06=c291bd5c70af25b90000000000133ef0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000010 RBX=ffff88801a1203c0 RCX=0000000000091941 RDX=0000000000091901 RSI=0000000000000dc0 RDI=0000000000091901 RBP=ffff888014677c78 RSP=ffff888014677c20 R8 =ffff88801a120400 R9 =000000000003ce60 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008441500 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ad9c 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 00007fb12f329900 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=00007ffdff5c5000 CR3=000000000ef20000 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=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