syzkaller login: [ 30.916993] BUG: Bad rss-counter state mm:00000000b1bb5734 type:MM_FILEPAGES val:33 [ 30.918480] BUG: Bad rss-counter state mm:00000000b1bb5734 type:MM_ANONPAGES val:22 [ 31.081692] ================================================================== [ 31.082630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.083594] Read of size 8 at addr ffff88800dbcaa50 by task sshd/222 [ 31.084470] [ 31.084714] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.085598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.086605] Call Trace: [ 31.086932] [ 31.087222] dump_stack_lvl+0x91/0xf0 [ 31.087717] print_report+0xcc/0x620 [ 31.088202] ? __virt_addr_valid+0x102/0x340 [ 31.088763] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090008] kasan_report+0xbe/0xf0 [ 31.090488] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.091108] vma_interval_tree_remove+0xc75/0xec0 [ 31.091711] vma_prepare+0xc54/0x11a0 [ 31.092194] __split_vma+0x5af/0x950 [ 31.092683] ? __pfx___split_vma+0x10/0x10 [ 31.093216] ? find_held_lock+0x2c/0x110 [ 31.093740] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.094310] ? lock_is_held_type+0x9f/0x120 [ 31.094861] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.095474] ? mtree_range_walk+0x632/0x900 [ 31.096027] ? mas_walk+0x5c7/0x7c0 [ 31.096515] do_vmi_munmap+0x1f1/0x2b0 [ 31.097027] mmap_region+0x1f9/0x2660 [ 31.097517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.098034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.098753] ? __pfx_lock_acquire+0x10/0x10 [ 31.099308] ? __pfx_mmap_region+0x10/0x10 [ 31.099840] ? security_mmap_addr+0x7d/0xa0 [ 31.100381] ? get_unmapped_area+0x1f5/0x3f0 [ 31.100945] do_mmap+0x854/0xf00 [ 31.101398] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.101898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.102482] ksys_mmap_pgoff+0x3af/0x500 [ 31.103001] do_syscall_64+0x3f/0x90 [ 31.103488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.104155] RIP: 0033:0x7f0ce4e83d82 [ 31.104637] 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 [ 31.106773] RSP: 002b:00007fff137f5248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.107706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ce4e83d82 [ 31.108564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ce42bd000 [ 31.109445] RBP: 00007f0ce42bd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.110310] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555893274d90 [ 31.111176] R13: 00007fff137f5260 R14: 00007fff137f5290 R15: 00007fff137f55f0 [ 31.112049] [ 31.112346] [ 31.112567] Allocated by task 215: [ 31.113020] kasan_save_stack+0x22/0x50 [ 31.113547] kasan_set_track+0x25/0x30 [ 31.114053] __kasan_slab_alloc+0x59/0x70 [ 31.114590] kmem_cache_alloc+0x16b/0x370 [ 31.115117] vm_area_dup+0x20/0x160 [ 31.115587] __split_vma+0x170/0x950 [ 31.116054] split_vma+0xc6/0x110 [ 31.116494] mprotect_fixup+0x8d2/0xb30 [ 31.117002] do_mprotect_pkey+0x87e/0xd40 [ 31.117527] __x64_sys_mprotect+0x78/0xc0 [ 31.118055] do_syscall_64+0x3f/0x90 [ 31.118535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119176] [ 31.119390] Freed by task 211: [ 31.119786] kasan_save_stack+0x22/0x50 [ 31.120291] kasan_set_track+0x25/0x30 [ 31.120817] kasan_save_free_info+0x2b/0x50 [ 31.121365] __kasan_slab_free+0x10a/0x190 [ 31.121915] kmem_cache_free+0x10d/0x4d0 [ 31.122428] rcu_core+0x8c8/0x2860 [ 31.122884] __do_softirq+0x1b7/0x7d4 [ 31.123377] [ 31.123601] Last potentially related work creation: [ 31.124203] kasan_save_stack+0x22/0x50 [ 31.124816] __kasan_record_aux_stack+0x8e/0xa0 [ 31.125399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.126063] remove_vma+0x139/0x170 [ 31.126524] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.127087] do_vmi_munmap+0x1f1/0x2b0 [ 31.127588] __vm_munmap+0x138/0x3a0 [ 31.128060] __x64_sys_munmap+0x59/0x80 [ 31.128563] do_syscall_64+0x3f/0x90 [ 31.129074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129727] [ 31.129942] Second to last potentially related work creation: [ 31.130630] kasan_save_stack+0x22/0x50 [ 31.131152] __kasan_record_aux_stack+0x8e/0xa0 [ 31.131736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.132396] remove_vma+0x139/0x170 [ 31.132859] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.133442] do_vmi_munmap+0x1f1/0x2b0 [ 31.133934] mmap_region+0x1f9/0x2660 [ 31.134429] do_mmap+0x854/0xf00 [ 31.134866] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135367] ksys_mmap_pgoff+0x3af/0x500 [ 31.135876] do_syscall_64+0x3f/0x90 [ 31.136374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137043] [ 31.137259] The buggy address belongs to the object at ffff88800dbca9f8 [ 31.137259] which belongs to the cache vm_area_struct of size 168 [ 31.138757] The buggy address is located 88 bytes inside of [ 31.138757] freed 168-byte region [ffff88800dbca9f8, ffff88800dbcaaa0) [ 31.140176] [ 31.140399] The buggy address belongs to the physical page: [ 31.141087] page:000000000c043c67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbca [ 31.142182] memcg:ffff8880095f8a01 [ 31.142620] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.143271] page_type: 0xffffffff() [ 31.143734] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bc8c0 dead000000000006 [ 31.144665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095f8a01 [ 31.145592] page dumped because: kasan: bad access detected [ 31.146266] [ 31.146490] Memory state around the buggy address: [ 31.147092] ffff88800dbca900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.147962] ffff88800dbca980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.148848] >ffff88800dbcaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.149710] ^ [ 31.150408] ffff88800dbcaa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.151283] ffff88800dbcab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.152151] ================================================================== [ 31.153125] Disabling lock debugging due to kernel taint [ 32.948823] BUG: Bad rss-counter state mm:0000000001f9820f type:MM_FILEPAGES val:33 [ 32.950114] BUG: Bad rss-counter state mm:0000000001f9820f type:MM_ANONPAGES val:22 [ 33.424275] BUG: Bad rss-counter state mm:00000000a3f4cc73 type:MM_FILEPAGES val:33 [ 33.425954] BUG: Bad rss-counter state mm:00000000a3f4cc73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52371' (ECDSA) to the list of known hosts. 2023/06/20 14:06:45 fuzzer started 2023/06/20 14:06:46 dialing manager at localhost:36067 2023/06/20 14:06:46 checking machine... 2023/06/20 14:06:46 checking revisions... [ 34.151460] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:06:46 testing simple program... [ 34.201848] cgroup: Unknown subsys name 'net' [ 34.277997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:06:45 Registers: info registers vcpu 0 RAX=1ffff11001d7deab RBX=ffff88800ebef528 RCX=1ffff11001cc2086 RDX=dffffc0000000000 RSI=ffff88800e18d630 RDI=ffff88800ebef558 RBP=ffff88800cf4f1a8 RSP=ffff88801680f9c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e18d620 R13=0000000000000000 R14=ffff88800fc1a508 R15=ffff88800fc1a4c0 RIP=ffffffff8184767e 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 00007f9d4f182900 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=00007f9d4f737650 CR3=000000000c970000 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=2035343a36303a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11002d88e4a RDX=dffffc0000000000 RSI=ffffffff81895b53 RDI=ffff888016c471f8 RBP=ffff888016c47250 RSP=ffff888016c47188 R8 =0000000000000001 R9 =ffff888016c47238 R10=0000000000038001 R11=00000000000243a0 R12=ffff888016c47258 R13=ffff888016c47240 R14=ffff888016c47239 R15=ffff888016c471f8 RIP=ffffffff81130706 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 00007fdb3128d900 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=00007fdb307ad000 CR3=000000000ca06000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c3376ae74703b9fd00000000000ae988 XMM05=8852c40f52e0aeb10000000000134e40 XMM06=00c3ffa147b8d8570000000000133c30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000