syzkaller login: [ 61.691612] BUG: Bad rss-counter state mm:0000000072484855 type:MM_FILEPAGES val:33 [ 61.692239] BUG: Bad rss-counter state mm:0000000072484855 type:MM_ANONPAGES val:22 [ 61.899903] ================================================================== [ 61.900482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.901039] Read of size 8 at addr ffff888016ba7ed8 by task sshd/223 [ 61.901525] [ 61.901666] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.902222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.903565] Call Trace: [ 61.903758] [ 61.903933] dump_stack_lvl+0x91/0xf0 [ 61.904282] print_report+0xcc/0x620 [ 61.904575] ? __virt_addr_valid+0x102/0x340 [ 61.904909] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.905331] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.905715] kasan_report+0xbe/0xf0 [ 61.906013] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.906457] vma_interval_tree_remove+0xc75/0xec0 [ 61.906876] vma_prepare+0xc54/0x11a0 [ 61.907227] __split_vma+0x5af/0x950 [ 61.907538] ? __pfx___split_vma+0x10/0x10 [ 61.907886] ? find_held_lock+0x2c/0x110 [ 61.908275] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.908640] ? lock_is_held_type+0x9f/0x120 [ 61.908983] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.909386] ? mtree_range_walk+0x632/0x900 [ 61.909720] ? mas_walk+0x5c7/0x7c0 [ 61.910002] do_vmi_munmap+0x1f1/0x2b0 [ 61.910332] mmap_region+0x1f9/0x2660 [ 61.910650] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.911156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.911662] ? __pfx_lock_acquire+0x10/0x10 [ 61.912007] ? __pfx_mmap_region+0x10/0x10 [ 61.912389] ? security_mmap_addr+0x7d/0xa0 [ 61.912782] ? get_unmapped_area+0x1f5/0x3f0 [ 61.913145] do_mmap+0x854/0xf00 [ 61.913427] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.913792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.914176] ksys_mmap_pgoff+0x3af/0x500 [ 61.914686] do_syscall_64+0x3f/0x90 [ 61.914998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.915439] RIP: 0033:0x7f98dd035d82 [ 61.915776] 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 [ 61.917222] RSP: 002b:00007ffc79ccc068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.917846] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98dd035d82 [ 61.918374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f98dc46f000 [ 61.918980] RBP: 00007f98dc46f000 R08: 0000000000000009 R09: 0000000000001000 [ 61.919638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3e80ced90 [ 61.920173] R13: 00007ffc79ccc080 R14: 00007ffc79ccc0b0 R15: 00007ffc79ccc410 [ 61.920740] [ 61.920927] [ 61.921059] Allocated by task 214: [ 61.921366] kasan_save_stack+0x22/0x50 [ 61.921725] kasan_set_track+0x25/0x30 [ 61.922037] __kasan_slab_alloc+0x59/0x70 [ 61.922391] kmem_cache_alloc+0x16b/0x370 [ 61.922798] vm_area_dup+0x20/0x160 [ 61.923086] __split_vma+0x170/0x950 [ 61.923422] split_vma+0xc6/0x110 [ 61.923742] mprotect_fixup+0x8d2/0xb30 [ 61.924049] do_mprotect_pkey+0x87e/0xd40 [ 61.924402] __x64_sys_mprotect+0x78/0xc0 [ 61.924797] do_syscall_64+0x3f/0x90 [ 61.925095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.925587] [ 61.925718] Freed by task 214: [ 61.925957] kasan_save_stack+0x22/0x50 [ 61.926293] kasan_set_track+0x25/0x30 [ 61.926672] kasan_save_free_info+0x2b/0x50 [ 61.927023] __kasan_slab_free+0x10a/0x190 [ 61.927419] kmem_cache_free+0x10d/0x4d0 [ 61.927772] rcu_core+0x8c8/0x2860 [ 61.928055] __do_softirq+0x1b7/0x7d4 [ 61.928387] [ 61.928577] Last potentially related work creation: [ 61.928957] kasan_save_stack+0x22/0x50 [ 61.929334] __kasan_record_aux_stack+0x8e/0xa0 [ 61.929773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.930168] remove_vma+0x139/0x170 [ 61.930446] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.930882] do_vmi_munmap+0x1f1/0x2b0 [ 61.931196] __vm_munmap+0x138/0x3a0 [ 61.931556] __x64_sys_munmap+0x59/0x80 [ 61.931872] do_syscall_64+0x3f/0x90 [ 61.932177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.932629] [ 61.932768] Second to last potentially related work creation: [ 61.933194] kasan_save_stack+0x22/0x50 [ 61.933568] __kasan_record_aux_stack+0x8e/0xa0 [ 61.933927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.934334] remove_vma+0x139/0x170 [ 61.934686] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.935037] do_vmi_munmap+0x1f1/0x2b0 [ 61.935345] mmap_region+0x1f9/0x2660 [ 61.935705] do_mmap+0x854/0xf00 [ 61.935980] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.936293] ksys_mmap_pgoff+0x3af/0x500 [ 61.936664] do_syscall_64+0x3f/0x90 [ 61.936977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.937392] [ 61.937583] The buggy address belongs to the object at ffff888016ba7e80 [ 61.937583] which belongs to the cache vm_area_struct of size 168 [ 61.938555] The buggy address is located 88 bytes inside of [ 61.938555] freed 168-byte region [ffff888016ba7e80, ffff888016ba7f28) [ 61.939566] [ 61.939702] The buggy address belongs to the physical page: [ 61.940088] page:0000000069e2c24e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ba7 [ 61.940844] memcg:ffff888019c2a101 [ 61.941127] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.941585] page_type: 0xffffffff() [ 61.941869] raw: 0100000000000200 ffff88800879fc80 ffffea0000670bc0 0000000000000006 [ 61.942498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c2a101 [ 61.943107] page dumped because: kasan: bad access detected [ 61.943582] [ 61.943714] Memory state around the buggy address: [ 61.944062] ffff888016ba7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.945562] ffff888016ba7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.946097] >ffff888016ba7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.946674] ^ [ 61.947155] ffff888016ba7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.947797] ffff888016ba7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.948372] ================================================================== [ 61.966900] Disabling lock debugging due to kernel taint [ 65.619570] BUG: Bad rss-counter state mm:00000000b5fb17fb type:MM_FILEPAGES val:33 [ 65.620240] BUG: Bad rss-counter state mm:00000000b5fb17fb type:MM_ANONPAGES val:22 [ 67.306794] BUG: Bad rss-counter state mm:000000005812201b type:MM_FILEPAGES val:33 [ 67.307484] BUG: Bad rss-counter state mm:000000005812201b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10391' (ECDSA) to the list of known hosts. 2023/06/20 10:01:48 fuzzer started 2023/06/20 10:01:49 dialing manager at localhost:44161 2023/06/20 10:01:49 checking machine... 2023/06/20 10:01:49 checking revisions... [ 68.178822] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:01:49 testing simple program... [ 68.248784] cgroup: Unknown subsys name 'net' [ 68.314154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:25 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff8453084b RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88806ce08e70 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=000000000008ce2f R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff1100d9c11d3 RIP=ffffffff8180eef9 RFL=00000016 [----AP-] 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 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=00007fff674fdfe8 CR3=000000001a494000 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=2038343a31303a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000002 RCX=ffffffff813ad6cf RDX=0000000000003ad7 RSI=0000000000003ad6 RDI=ffffffff864f671c RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307f4 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 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=00007f88f4708328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000