syzkaller login: [ 32.200090] BUG: Bad rss-counter state mm:000000001b00391e type:MM_FILEPAGES val:33 [ 32.201044] BUG: Bad rss-counter state mm:000000001b00391e type:MM_ANONPAGES val:22 [ 32.364193] ================================================================== [ 32.365047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.365926] Read of size 8 at addr ffff88801910ba50 by task sshd/220 [ 32.366646] [ 32.366855] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.367786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.368700] Call Trace: [ 32.369001] [ 32.369275] dump_stack_lvl+0x91/0xf0 [ 32.369809] print_report+0xcc/0x620 [ 32.370313] ? __virt_addr_valid+0x102/0x340 [ 32.370885] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.371523] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.372181] kasan_report+0xbe/0xf0 [ 32.372681] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.373322] vma_interval_tree_remove+0xc75/0xec0 [ 32.373952] vma_prepare+0xc54/0x11a0 [ 32.374458] __split_vma+0x5af/0x950 [ 32.374954] ? __pfx___split_vma+0x10/0x10 [ 32.375511] ? find_held_lock+0x2c/0x110 [ 32.376066] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.376657] ? lock_is_held_type+0x9f/0x120 [ 32.377219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.377851] ? mtree_range_walk+0x632/0x900 [ 32.378421] ? mas_walk+0x5c7/0x7c0 [ 32.378915] do_vmi_munmap+0x1f1/0x2b0 [ 32.379441] mmap_region+0x1f9/0x2660 [ 32.379962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.380506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.381255] ? __pfx_lock_acquire+0x10/0x10 [ 32.381819] ? __pfx_mmap_region+0x10/0x10 [ 32.382374] ? security_mmap_addr+0x7d/0xa0 [ 32.382933] ? get_unmapped_area+0x1f5/0x3f0 [ 32.383501] do_mmap+0x854/0xf00 [ 32.383974] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.384486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.385085] ksys_mmap_pgoff+0x3af/0x500 [ 32.385626] do_syscall_64+0x3f/0x90 [ 32.386131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.386806] RIP: 0033:0x7f6bd1367d82 [ 32.387288] 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 [ 32.389544] RSP: 002b:00007fff54128398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.390496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bd1367d82 [ 32.391392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bd07a1000 [ 32.392291] RBP: 00007f6bd07a1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.393181] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3a800cf70 [ 32.394070] R13: 00007fff541283b0 R14: 00007fff541283e0 R15: 00007fff54128740 [ 32.394970] [ 32.395278] [ 32.395499] Allocated by task 212: [ 32.395942] kasan_save_stack+0x22/0x50 [ 32.396439] kasan_set_track+0x25/0x30 [ 32.396926] __kasan_slab_alloc+0x59/0x70 [ 32.397449] kmem_cache_alloc+0x16b/0x370 [ 32.397961] vm_area_dup+0x20/0x160 [ 32.398414] __split_vma+0x170/0x950 [ 32.398875] split_vma+0xc6/0x110 [ 32.399316] mprotect_fixup+0x8d2/0xb30 [ 32.399824] do_mprotect_pkey+0x87e/0xd40 [ 32.400339] __x64_sys_mprotect+0x78/0xc0 [ 32.400858] do_syscall_64+0x3f/0x90 [ 32.401331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.401969] [ 32.402184] Freed by task 203: [ 32.402579] kasan_save_stack+0x22/0x50 [ 32.403086] kasan_set_track+0x25/0x30 [ 32.403581] kasan_save_free_info+0x2b/0x50 [ 32.404130] __kasan_slab_free+0x10a/0x190 [ 32.404666] kmem_cache_free+0x10d/0x4d0 [ 32.405170] rcu_core+0x8c8/0x2860 [ 32.405613] __do_softirq+0x1b7/0x7d4 [ 32.406081] [ 32.406295] Last potentially related work creation: [ 32.406878] kasan_save_stack+0x22/0x50 [ 32.407374] __kasan_record_aux_stack+0x8e/0xa0 [ 32.407966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.408628] remove_vma+0x139/0x170 [ 32.409095] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.409678] do_vmi_munmap+0x1f1/0x2b0 [ 32.410180] __vm_munmap+0x138/0x3a0 [ 32.410666] __x64_sys_munmap+0x59/0x80 [ 32.411181] do_syscall_64+0x3f/0x90 [ 32.411672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.412321] [ 32.412534] The buggy address belongs to the object at ffff88801910b9f8 [ 32.412534] which belongs to the cache vm_area_struct of size 168 [ 32.413979] The buggy address is located 88 bytes inside of [ 32.413979] freed 168-byte region [ffff88801910b9f8, ffff88801910baa0) [ 32.415376] [ 32.415589] The buggy address belongs to the physical page: [ 32.416257] page:000000002a1b1556 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1910b [ 32.417336] memcg:ffff88800fbbc401 [ 32.417760] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.418403] page_type: 0xffffffff() [ 32.418850] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.419782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbbc401 [ 32.420693] page dumped because: kasan: bad access detected [ 32.421350] [ 32.421561] Memory state around the buggy address: [ 32.422134] ffff88801910b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.422982] ffff88801910b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.423830] >ffff88801910ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.424674] ^ [ 32.425362] ffff88801910ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.426217] ffff88801910bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.427059] ================================================================== [ 32.428036] Disabling lock debugging due to kernel taint [ 34.283628] BUG: Bad rss-counter state mm:0000000023c6da83 type:MM_FILEPAGES val:33 [ 34.284386] BUG: Bad rss-counter state mm:0000000023c6da83 type:MM_ANONPAGES val:22 [ 34.712904] BUG: Bad rss-counter state mm:00000000d8c9017a type:MM_FILEPAGES val:33 [ 34.713980] BUG: Bad rss-counter state mm:00000000d8c9017a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49602' (ECDSA) to the list of known hosts. 2023/06/19 15:10:56 fuzzer started 2023/06/19 15:10:56 dialing manager at localhost:44161 2023/06/19 15:10:56 checking machine... 2023/06/19 15:10:56 checking revisions... [ 35.455428] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:10:56 testing simple program... [ 35.522002] cgroup: Unknown subsys name 'net' [ 35.587351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:10:55 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000018 RCX=ffffffff816b0a90 RDX=ffffed100fffb931 RSI=0000000000000008 RDI=ffff88807ffdc980 RBP=000000000003fda0 RSP=ffff88801774f988 R8 =0000000000000001 R9 =ffffed100fffb930 R10=ffff88807ffdc987 R11=000000000000fe58 R12=ffff88807ffdc980 R13=0000000000000480 R14=000000000000cc30 R15=ffff88807ffdc500 RIP=ffffffff816b0a95 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 00007f2d11734900 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=00007ffff7fe6000 CR3=00000000158e8000 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=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=00007f5623a3b160 CR3=000000000f076000 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=2035353a30313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000