syzkaller login: [ 30.715403] BUG: Bad rss-counter state mm:00000000ebb13b32 type:MM_FILEPAGES val:33 [ 30.716538] BUG: Bad rss-counter state mm:00000000ebb13b32 type:MM_ANONPAGES val:22 [ 30.867749] ================================================================== [ 30.868838] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.870120] Read of size 8 at addr ffff8880096c3140 by task sshd/220 [ 30.870894] [ 30.871105] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.871941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.872869] Call Trace: [ 30.873175] [ 30.873444] dump_stack_lvl+0x91/0xf0 [ 30.873960] print_report+0xcc/0x620 [ 30.874424] ? __virt_addr_valid+0x102/0x340 [ 30.874966] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875556] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876156] kasan_report+0xbe/0xf0 [ 30.876615] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877230] vma_interval_tree_remove+0xc75/0xec0 [ 30.877803] vma_prepare+0xc54/0x11a0 [ 30.878297] __split_vma+0x5af/0x950 [ 30.878771] ? __pfx___split_vma+0x10/0x10 [ 30.879337] ? find_held_lock+0x2c/0x110 [ 30.879885] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.880451] ? lock_is_held_type+0x9f/0x120 [ 30.881015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.881629] ? mtree_range_walk+0x632/0x900 [ 30.882223] ? mas_walk+0x5c7/0x7c0 [ 30.882710] do_vmi_munmap+0x1f1/0x2b0 [ 30.883238] mmap_region+0x1f9/0x2660 [ 30.883891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.884605] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.885590] ? __pfx_lock_acquire+0x10/0x10 [ 30.886327] ? __pfx_mmap_region+0x10/0x10 [ 30.887043] ? security_mmap_addr+0x7d/0xa0 [ 30.887765] ? get_unmapped_area+0x1f5/0x3f0 [ 30.888396] do_mmap+0x854/0xf00 [ 30.888864] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.889371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.889976] ksys_mmap_pgoff+0x3af/0x500 [ 30.890503] do_syscall_64+0x3f/0x90 [ 30.891013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891677] RIP: 0033:0x7fbe0dc3fd82 [ 30.892171] 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 [ 30.894364] RSP: 002b:00007ffea2b6cae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.895321] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe0dc3fd82 [ 30.896201] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe0d079000 [ 30.897099] RBP: 00007fbe0d079000 R08: 0000000000000009 R09: 0000000000001000 [ 30.897985] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641f6ed2b20 [ 30.898859] R13: 00007ffea2b6cb00 R14: 00007ffea2b6cb30 R15: 00007ffea2b6ce90 [ 30.899748] [ 30.900062] [ 30.900286] Allocated by task 213: [ 30.900729] kasan_save_stack+0x22/0x50 [ 30.901265] kasan_set_track+0x25/0x30 [ 30.901871] __kasan_slab_alloc+0x59/0x70 [ 30.902387] kmem_cache_alloc+0x16b/0x370 [ 30.902877] vm_area_dup+0x20/0x160 [ 30.903312] __split_vma+0x170/0x950 [ 30.903756] split_vma+0xc6/0x110 [ 30.904171] mprotect_fixup+0x8d2/0xb30 [ 30.904647] do_mprotect_pkey+0x87e/0xd40 [ 30.905139] __x64_sys_mprotect+0x78/0xc0 [ 30.905631] do_syscall_64+0x3f/0x90 [ 30.906092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906702] [ 30.906908] Freed by task 213: [ 30.907281] kasan_save_stack+0x22/0x50 [ 30.907759] kasan_set_track+0x25/0x30 [ 30.908227] kasan_save_free_info+0x2b/0x50 [ 30.908730] __kasan_slab_free+0x10a/0x190 [ 30.909233] kmem_cache_free+0x10d/0x4d0 [ 30.909714] rcu_core+0x8c8/0x2860 [ 30.910142] __do_softirq+0x1b7/0x7d4 [ 30.910597] [ 30.910805] Last potentially related work creation: [ 30.911357] kasan_save_stack+0x22/0x50 [ 30.911835] __kasan_record_aux_stack+0x8e/0xa0 [ 30.912377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.913134] remove_vma+0x139/0x170 [ 30.913662] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.914335] do_vmi_munmap+0x1f1/0x2b0 [ 30.914907] __vm_munmap+0x138/0x3a0 [ 30.915462] __x64_sys_munmap+0x59/0x80 [ 30.916044] do_syscall_64+0x3f/0x90 [ 30.916604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.917364] [ 30.917615] The buggy address belongs to the object at ffff8880096c30e8 [ 30.917615] which belongs to the cache vm_area_struct of size 168 [ 30.919405] The buggy address is located 88 bytes inside of [ 30.919405] freed 168-byte region [ffff8880096c30e8, ffff8880096c3190) [ 30.921093] [ 30.921347] The buggy address belongs to the physical page: [ 30.922161] page:00000000e2cc8d30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96c3 [ 30.923473] memcg:ffff88800e9b1201 [ 30.923993] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.924816] page_type: 0xffffffff() [ 30.925359] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.926471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9b1201 [ 30.927569] page dumped because: kasan: bad access detected [ 30.928353] [ 30.928593] Memory state around the buggy address: [ 30.929251] ffff8880096c3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.930210] ffff8880096c3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.931135] >ffff8880096c3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.932076] ^ [ 30.932752] ffff8880096c3180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.933676] ffff8880096c3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.934628] ================================================================== [ 30.935673] Disabling lock debugging due to kernel taint [ 32.875029] BUG: Bad rss-counter state mm:0000000026e29517 type:MM_FILEPAGES val:33 [ 32.876573] BUG: Bad rss-counter state mm:0000000026e29517 type:MM_ANONPAGES val:22 [ 33.353515] BUG: Bad rss-counter state mm:00000000c970618d type:MM_FILEPAGES val:33 [ 33.354652] BUG: Bad rss-counter state mm:00000000c970618d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60202' (ECDSA) to the list of known hosts. 2023/06/20 19:29:55 fuzzer started 2023/06/20 19:29:56 dialing manager at localhost:36067 2023/06/20 19:29:56 checking machine... 2023/06/20 19:29:56 checking revisions... [ 34.060847] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:29:56 testing simple program... [ 34.113166] cgroup: Unknown subsys name 'net' [ 34.155125] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:29:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102ef310 RCX=0000000000000001 RDX=1ffff1100205de64 RSI=ffff8880102ef3b0 RDI=ffff8880102ef320 RBP=ffff8880102ef3b0 RSP=ffff8880102ef218 R8 =ffffffff8608a55a R9 =ffff8880102ef350 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff8880102e8000 R14=ffff8880102ef3b8 R15=ffff8880102ef310 RIP=ffffffff81130468 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 00007f845a83d900 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=000055a3fe729768 CR3=0000000013ad6000 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=167e0403f21b3fd900000000000ae988 XMM05=6659f9631e58c66c0000000000132bd0 XMM06=4fda316b135da52b0000000000131c70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff888017f17c38 RCX=ffffffff81f76c1f RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888017f17c38 RSP=ffff888017f179a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff8880090b3808 R15=dffffc0000000000 RIP=ffffffff814c0408 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 00007f74b42a1900 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=00007f74b4856650 CR3=000000001a2f8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000