syzkaller login: [ 32.710759] BUG: Bad rss-counter state mm:0000000052085e2a type:MM_FILEPAGES val:33 [ 32.712410] BUG: Bad rss-counter state mm:0000000052085e2a type:MM_ANONPAGES val:22 [ 32.873162] ================================================================== [ 32.874082] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.875021] Read of size 8 at addr ffff888019c79798 by task sshd/219 [ 32.875787] [ 32.876069] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.876977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.877962] Call Trace: [ 32.878308] [ 32.878596] dump_stack_lvl+0x91/0xf0 [ 32.879087] print_report+0xcc/0x620 [ 32.879581] ? __virt_addr_valid+0x102/0x340 [ 32.880144] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.880774] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.881396] kasan_report+0xbe/0xf0 [ 32.881868] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.882498] vma_interval_tree_remove+0xc75/0xec0 [ 32.883104] vma_prepare+0xc54/0x11a0 [ 32.883603] __split_vma+0x5af/0x950 [ 32.884091] ? __pfx___split_vma+0x10/0x10 [ 32.884625] ? find_held_lock+0x2c/0x110 [ 32.885157] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.885717] ? lock_is_held_type+0x9f/0x120 [ 32.886266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.886883] ? mtree_range_walk+0x632/0x900 [ 32.887449] ? mas_walk+0x5c7/0x7c0 [ 32.887936] do_vmi_munmap+0x1f1/0x2b0 [ 32.888499] mmap_region+0x1f9/0x2660 [ 32.888989] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.889517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.890241] ? __pfx_lock_acquire+0x10/0x10 [ 32.890787] ? __pfx_mmap_region+0x10/0x10 [ 32.891316] ? security_mmap_addr+0x7d/0xa0 [ 32.891846] ? get_unmapped_area+0x1f5/0x3f0 [ 32.892428] do_mmap+0x854/0xf00 [ 32.892871] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.893374] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.893940] ksys_mmap_pgoff+0x3af/0x500 [ 32.894442] do_syscall_64+0x3f/0x90 [ 32.894917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.895558] RIP: 0033:0x7fdcc4613d82 [ 32.896014] 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 [ 32.898159] RSP: 002b:00007ffd2384a108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.899060] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcc4613d82 [ 32.899900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcc3a4d000 [ 32.900763] RBP: 00007fdcc3a4d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.901601] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9a8ca1ec0 [ 32.902451] R13: 00007ffd2384a120 R14: 00007ffd2384a150 R15: 00007ffd2384a4b0 [ 32.903292] [ 32.903583] [ 32.903797] Allocated by task 212: [ 32.904224] kasan_save_stack+0x22/0x50 [ 32.904737] kasan_set_track+0x25/0x30 [ 32.905232] __kasan_slab_alloc+0x59/0x70 [ 32.905750] kmem_cache_alloc+0x16b/0x370 [ 32.906268] vm_area_dup+0x20/0x160 [ 32.906719] __split_vma+0x170/0x950 [ 32.907191] split_vma+0xc6/0x110 [ 32.907625] mprotect_fixup+0x8d2/0xb30 [ 32.908124] do_mprotect_pkey+0x87e/0xd40 [ 32.908657] __x64_sys_mprotect+0x78/0xc0 [ 32.909177] do_syscall_64+0x3f/0x90 [ 32.909645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.910289] [ 32.910504] Freed by task 212: [ 32.910893] kasan_save_stack+0x22/0x50 [ 32.911394] kasan_set_track+0x25/0x30 [ 32.911882] kasan_save_free_info+0x2b/0x50 [ 32.912422] __kasan_slab_free+0x10a/0x190 [ 32.912957] kmem_cache_free+0x10d/0x4d0 [ 32.913458] rcu_core+0x8c8/0x2860 [ 32.913902] __do_softirq+0x1b7/0x7d4 [ 32.914376] [ 32.914590] Last potentially related work creation: [ 32.915176] kasan_save_stack+0x22/0x50 [ 32.915679] __kasan_record_aux_stack+0x8e/0xa0 [ 32.916247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.916891] remove_vma+0x139/0x170 [ 32.917337] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.917896] do_vmi_munmap+0x1f1/0x2b0 [ 32.918388] __vm_munmap+0x138/0x3a0 [ 32.918849] __x64_sys_munmap+0x59/0x80 [ 32.919341] do_syscall_64+0x3f/0x90 [ 32.919808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.920458] [ 32.920673] The buggy address belongs to the object at ffff888019c79740 [ 32.920673] which belongs to the cache vm_area_struct of size 168 [ 32.922135] The buggy address is located 88 bytes inside of [ 32.922135] freed 168-byte region [ffff888019c79740, ffff888019c797e8) [ 32.923530] [ 32.923744] The buggy address belongs to the physical page: [ 32.924421] page:000000008a43e836 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c79 [ 32.925514] memcg:ffff888019c72201 [ 32.925939] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.926630] page_type: 0xffffffff() [ 32.927075] raw: 0100000000000200 ffff88800879fc80 ffffea0000671c40 0000000000000007 [ 32.927983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c72201 [ 32.928899] page dumped because: kasan: bad access detected [ 32.929551] [ 32.929765] Memory state around the buggy address: [ 32.930341] ffff888019c79680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.931189] ffff888019c79700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.932043] >ffff888019c79780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.932894] ^ [ 32.933385] ffff888019c79800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.934236] ffff888019c79880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.935093] ================================================================== [ 32.936188] Disabling lock debugging due to kernel taint [ 35.404400] BUG: Bad rss-counter state mm:000000002f55ceef type:MM_FILEPAGES val:33 [ 35.405445] BUG: Bad rss-counter state mm:000000002f55ceef type:MM_ANONPAGES val:22 [ 35.938524] BUG: Bad rss-counter state mm:00000000ec5ee7d9 type:MM_FILEPAGES val:33 [ 35.939717] BUG: Bad rss-counter state mm:00000000ec5ee7d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41609' (ECDSA) to the list of known hosts. 2023/06/19 21:00:14 fuzzer started 2023/06/19 21:00:15 dialing manager at localhost:44161 2023/06/19 21:00:15 checking machine... 2023/06/19 21:00:15 checking revisions... [ 36.550490] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:00:15 testing simple program... [ 36.602120] cgroup: Unknown subsys name 'net' [ 36.668480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:10 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=00007f3fae92c870 CR3=000000000c456000 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=2034313a30303a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a30303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff856d8220 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=ffffffff856d8220 RSP=ffff88800fd17c78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6500 R13=ffff888015f2f900 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812e0410 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 00007f9357fad900 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=00007f93585650b0 CR3=000000001867a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000