syzkaller login: [ 35.707522] BUG: Bad rss-counter state mm:0000000057236131 type:MM_FILEPAGES val:33 [ 35.708797] BUG: Bad rss-counter state mm:0000000057236131 type:MM_ANONPAGES val:22 [ 35.867533] ================================================================== [ 35.868662] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.870010] Read of size 8 at addr ffff88800988f798 by task sshd/220 [ 35.870868] [ 35.871088] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.871940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.872909] Call Trace: [ 35.873228] [ 35.873510] dump_stack_lvl+0x91/0xf0 [ 35.874007] print_report+0xcc/0x620 [ 35.874509] ? __virt_addr_valid+0x102/0x340 [ 35.875059] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.875672] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.876291] kasan_report+0xbe/0xf0 [ 35.876767] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.877385] vma_interval_tree_remove+0xc75/0xec0 [ 35.877987] vma_prepare+0xc54/0x11a0 [ 35.878478] __split_vma+0x5af/0x950 [ 35.878956] ? __pfx___split_vma+0x10/0x10 [ 35.879485] ? find_held_lock+0x2c/0x110 [ 35.880026] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.880609] ? lock_is_held_type+0x9f/0x120 [ 35.881178] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.881827] ? mtree_range_walk+0x632/0x900 [ 35.882426] ? mas_walk+0x5c7/0x7c0 [ 35.882924] do_vmi_munmap+0x1f1/0x2b0 [ 35.883446] mmap_region+0x1f9/0x2660 [ 35.883960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.884486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.885230] ? __pfx_lock_acquire+0x10/0x10 [ 35.885789] ? __pfx_mmap_region+0x10/0x10 [ 35.886342] ? security_mmap_addr+0x7d/0xa0 [ 35.886902] ? get_unmapped_area+0x1f5/0x3f0 [ 35.887484] do_mmap+0x854/0xf00 [ 35.887942] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.888456] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.889046] ksys_mmap_pgoff+0x3af/0x500 [ 35.889579] do_syscall_64+0x3f/0x90 [ 35.890093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.890784] RIP: 0033:0x7f28fb5c8d82 [ 35.891274] 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 [ 35.893532] RSP: 002b:00007fff16e42ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.894519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28fb5c8d82 [ 35.895423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28faa02000 [ 35.896339] RBP: 00007f28faa02000 R08: 0000000000000009 R09: 0000000000001000 [ 35.897247] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d39dce980 [ 35.898148] R13: 00007fff16e42b00 R14: 00007fff16e42b30 R15: 00007fff16e42e90 [ 35.899061] [ 35.899367] [ 35.899590] Allocated by task 213: [ 35.900056] kasan_save_stack+0x22/0x50 [ 35.900584] kasan_set_track+0x25/0x30 [ 35.901100] __kasan_slab_alloc+0x59/0x70 [ 35.901656] kmem_cache_alloc+0x16b/0x370 [ 35.902195] vm_area_dup+0x20/0x160 [ 35.902690] __split_vma+0x170/0x950 [ 35.903180] split_vma+0xc6/0x110 [ 35.903638] mprotect_fixup+0x8d2/0xb30 [ 35.904172] do_mprotect_pkey+0x87e/0xd40 [ 35.904723] __x64_sys_mprotect+0x78/0xc0 [ 35.905276] do_syscall_64+0x3f/0x90 [ 35.905777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.906471] [ 35.906702] Freed by task 213: [ 35.907130] kasan_save_stack+0x22/0x50 [ 35.907654] kasan_set_track+0x25/0x30 [ 35.908188] kasan_save_free_info+0x2b/0x50 [ 35.908741] __kasan_slab_free+0x10a/0x190 [ 35.909306] kmem_cache_free+0x10d/0x4d0 [ 35.909838] rcu_core+0x8c8/0x2860 [ 35.910313] __do_softirq+0x1b7/0x7d4 [ 35.910860] [ 35.911093] Last potentially related work creation: [ 35.911715] kasan_save_stack+0x22/0x50 [ 35.912236] __kasan_record_aux_stack+0x8e/0xa0 [ 35.912905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.913640] remove_vma+0x139/0x170 [ 35.914148] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.914783] do_vmi_munmap+0x1f1/0x2b0 [ 35.915325] __vm_munmap+0x138/0x3a0 [ 35.915847] __x64_sys_munmap+0x59/0x80 [ 35.916401] do_syscall_64+0x3f/0x90 [ 35.916965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.917716] [ 35.917970] The buggy address belongs to the object at ffff88800988f740 [ 35.917970] which belongs to the cache vm_area_struct of size 168 [ 35.919656] The buggy address is located 88 bytes inside of [ 35.919656] freed 168-byte region [ffff88800988f740, ffff88800988f7e8) [ 35.921288] [ 35.921532] The buggy address belongs to the physical page: [ 35.922295] page:000000009e7cc6c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x988f [ 35.923587] memcg:ffff88800d4a4901 [ 35.924167] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.924917] page_type: 0xffffffff() [ 35.925514] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8780 dead000000000004 [ 35.926771] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4a4901 [ 35.927808] page dumped because: kasan: bad access detected [ 35.928499] [ 35.928724] Memory state around the buggy address: [ 35.929345] ffff88800988f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.930248] ffff88800988f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.931182] >ffff88800988f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.932080] ^ [ 35.932604] ffff88800988f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.933527] ffff88800988f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.934446] ================================================================== [ 35.935520] Disabling lock debugging due to kernel taint [ 38.158766] BUG: Bad rss-counter state mm:000000000bb7b525 type:MM_FILEPAGES val:33 [ 38.160510] BUG: Bad rss-counter state mm:000000000bb7b525 type:MM_ANONPAGES val:22 [ 38.653864] BUG: Bad rss-counter state mm:00000000de3497fd type:MM_FILEPAGES val:33 [ 38.654954] BUG: Bad rss-counter state mm:00000000de3497fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55983' (ECDSA) to the list of known hosts. 2023/06/21 09:42:16 fuzzer started 2023/06/21 09:42:16 dialing manager at localhost:36067 2023/06/21 09:42:16 checking machine... 2023/06/21 09:42:16 checking revisions... [ 39.383983] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:42:16 testing simple program... [ 39.424107] cgroup: Unknown subsys name 'net' [ 39.459742] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff813782f8 RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000022978 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff88800d971b40 R15=ffff88806ce09a50 RIP=ffffffff8113062c 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 00007f2e6950b900 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=00007f2e69ac30b0 CR3=000000000ca28000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc818698b40 CR3=000000000d334000 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=2035313a32343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a32343a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000