syzkaller login: [ 55.399698] BUG: Bad rss-counter state mm:00000000ae705c8a type:MM_FILEPAGES val:33 [ 55.401099] BUG: Bad rss-counter state mm:00000000ae705c8a type:MM_ANONPAGES val:22 [ 55.545011] ================================================================== [ 55.545915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.546836] Read of size 8 at addr ffff888010266310 by task sshd/220 [ 55.547590] [ 55.547893] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.548845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.550129] Call Trace: [ 55.550545] [ 55.550856] dump_stack_lvl+0x91/0xf0 [ 55.551330] print_report+0xcc/0x620 [ 55.551823] ? __virt_addr_valid+0x102/0x340 [ 55.552359] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.552996] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.553614] kasan_report+0xbe/0xf0 [ 55.554074] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.554691] vma_interval_tree_remove+0xc75/0xec0 [ 55.555279] vma_prepare+0xc54/0x11a0 [ 55.555761] __split_vma+0x5af/0x950 [ 55.556220] ? __pfx___split_vma+0x10/0x10 [ 55.556763] ? find_held_lock+0x2c/0x110 [ 55.557279] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.557840] ? lock_is_held_type+0x9f/0x120 [ 55.558366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.558980] ? mtree_range_walk+0x632/0x900 [ 55.559527] ? mas_walk+0x5c7/0x7c0 [ 55.559987] do_vmi_munmap+0x1f1/0x2b0 [ 55.560466] mmap_region+0x1f9/0x2660 [ 55.560990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.561501] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.562194] ? __pfx_lock_acquire+0x10/0x10 [ 55.562725] ? __pfx_mmap_region+0x10/0x10 [ 55.563244] ? security_mmap_addr+0x7d/0xa0 [ 55.563774] ? get_unmapped_area+0x1f5/0x3f0 [ 55.564315] do_mmap+0x854/0xf00 [ 55.564774] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.565263] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.565819] ksys_mmap_pgoff+0x3af/0x500 [ 55.566312] do_syscall_64+0x3f/0x90 [ 55.566823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.567465] RIP: 0033:0x7f980df4ad82 [ 55.567945] 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 [ 55.570093] RSP: 002b:00007ffe82aac2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.571034] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f980df4ad82 [ 55.571910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f980d384000 [ 55.572787] RBP: 00007f980d384000 R08: 0000000000000009 R09: 0000000000001000 [ 55.573658] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d7be7bec0 [ 55.574510] R13: 00007ffe82aac2d0 R14: 00007ffe82aac300 R15: 00007ffe82aac660 [ 55.575370] [ 55.575685] [ 55.575901] Allocated by task 213: [ 55.576331] kasan_save_stack+0x22/0x50 [ 55.576864] kasan_set_track+0x25/0x30 [ 55.577379] __kasan_slab_alloc+0x59/0x70 [ 55.577918] kmem_cache_alloc+0x16b/0x370 [ 55.578435] vm_area_dup+0x20/0x160 [ 55.578903] __split_vma+0x170/0x950 [ 55.579372] split_vma+0xc6/0x110 [ 55.579826] mprotect_fixup+0x8d2/0xb30 [ 55.580326] do_mprotect_pkey+0x87e/0xd40 [ 55.580895] __x64_sys_mprotect+0x78/0xc0 [ 55.581423] do_syscall_64+0x3f/0x90 [ 55.581911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.582565] [ 55.582781] Freed by task 213: [ 55.583172] kasan_save_stack+0x22/0x50 [ 55.583691] kasan_set_track+0x25/0x30 [ 55.584185] kasan_save_free_info+0x2b/0x50 [ 55.584758] __kasan_slab_free+0x10a/0x190 [ 55.585312] kmem_cache_free+0x10d/0x4d0 [ 55.585839] rcu_core+0x8c8/0x2860 [ 55.586291] __do_softirq+0x1b7/0x7d4 [ 55.586791] [ 55.587009] Last potentially related work creation: [ 55.587611] kasan_save_stack+0x22/0x50 [ 55.588250] __kasan_record_aux_stack+0x8e/0xa0 [ 55.588972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.589677] remove_vma+0x139/0x170 [ 55.590143] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.590740] do_vmi_munmap+0x1f1/0x2b0 [ 55.591243] __vm_munmap+0x138/0x3a0 [ 55.591746] __x64_sys_munmap+0x59/0x80 [ 55.592253] do_syscall_64+0x3f/0x90 [ 55.592777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.593461] [ 55.593692] Second to last potentially related work creation: [ 55.594389] kasan_save_stack+0x22/0x50 [ 55.594915] __kasan_record_aux_stack+0x8e/0xa0 [ 55.595517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.596174] remove_vma+0x139/0x170 [ 55.596659] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.597250] do_vmi_munmap+0x1f1/0x2b0 [ 55.597760] mmap_region+0x1f9/0x2660 [ 55.598252] do_mmap+0x854/0xf00 [ 55.598706] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.599206] ksys_mmap_pgoff+0x3af/0x500 [ 55.599737] do_syscall_64+0x3f/0x90 [ 55.600227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.600933] [ 55.601162] The buggy address belongs to the object at ffff8880102662b8 [ 55.601162] which belongs to the cache vm_area_struct of size 168 [ 55.602696] The buggy address is located 88 bytes inside of [ 55.602696] freed 168-byte region [ffff8880102662b8, ffff888010266360) [ 55.604173] [ 55.604389] The buggy address belongs to the physical page: [ 55.605100] page:00000000aff1187e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10266 [ 55.606213] memcg:ffff88800ede0601 [ 55.606665] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.607344] page_type: 0xffffffff() [ 55.607821] raw: 0100000000000200 ffff88800879fc80 ffffea00003c3280 dead000000000006 [ 55.608774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ede0601 [ 55.609743] page dumped because: kasan: bad access detected [ 55.610424] [ 55.610653] Memory state around the buggy address: [ 55.611256] ffff888010266200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 55.612160] ffff888010266280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 55.613067] >ffff888010266300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 55.613927] ^ [ 55.614406] ffff888010266380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.615293] ffff888010266400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 55.616145] ================================================================== [ 55.617152] Disabling lock debugging due to kernel taint [ 58.540811] BUG: Bad rss-counter state mm:00000000faef90ea type:MM_FILEPAGES val:33 [ 58.542037] BUG: Bad rss-counter state mm:00000000faef90ea type:MM_ANONPAGES val:22 [ 59.133679] BUG: Bad rss-counter state mm:00000000b8421f1e type:MM_FILEPAGES val:33 [ 59.134845] BUG: Bad rss-counter state mm:00000000b8421f1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37017' (ECDSA) to the list of known hosts. 2023/06/20 00:18:55 fuzzer started 2023/06/20 00:18:55 dialing manager at localhost:44161 2023/06/20 00:18:55 checking machine... 2023/06/20 00:18:55 checking revisions... [ 59.797604] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:18:56 testing simple program... [ 59.845369] cgroup: Unknown subsys name 'net' [ 59.882185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:18:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe5f732cb8 CR3=000000000e3d0000 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=2035353a38313a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38313a3030203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000017df2 RCX=ffffffff813cb523 RDX=ffff88800fb7d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88806cf2b988 RSP=ffff88806cf09ed0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=0000000da1ba3f9a R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=00000000004d8d08 RIP=ffffffff814c07e4 RFL=00000046 [---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 00007f2b6037e900 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=00007f2b5f7a7c80 CR3=000000000d630000 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=bca95f2411644aa336459882c26e58c1 XMM02=000000000011d870eff9b2d0a8fce9cb XMM03=000000000011d9402c67c8bc2e329bc3 XMM04=4fc2ebd6658280fd00000000000ae988 XMM05=794e9b536b1a9b420000000000135610 XMM06=4fda316b135da52b0000000000134d80 XMM07=e042d86d42eb936e0000000000124500 XMM08=d46c1fce302928b8000000000011d940 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000