syzkaller login: [ 31.401080] BUG: Bad rss-counter state mm:000000000813e2d2 type:MM_FILEPAGES val:33 [ 31.402496] BUG: Bad rss-counter state mm:000000000813e2d2 type:MM_ANONPAGES val:22 [ 31.566641] ================================================================== [ 31.567712] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.568682] Read of size 8 at addr ffff8880181e0a50 by task sshd/222 [ 31.569642] [ 31.569861] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.570744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.571742] Call Trace: [ 31.572064] [ 31.572355] dump_stack_lvl+0x91/0xf0 [ 31.572851] print_report+0xcc/0x620 [ 31.573336] ? __virt_addr_valid+0x102/0x340 [ 31.573897] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.574517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.575155] kasan_report+0xbe/0xf0 [ 31.575636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.576262] vma_interval_tree_remove+0xc75/0xec0 [ 31.576861] vma_prepare+0xc54/0x11a0 [ 31.577340] __split_vma+0x5af/0x950 [ 31.577817] ? __pfx___split_vma+0x10/0x10 [ 31.578346] ? find_held_lock+0x2c/0x110 [ 31.578890] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.579464] ? lock_is_held_type+0x9f/0x120 [ 31.580017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.580620] ? mtree_range_walk+0x632/0x900 [ 31.581174] ? mas_walk+0x5c7/0x7c0 [ 31.581661] do_vmi_munmap+0x1f1/0x2b0 [ 31.582164] mmap_region+0x1f9/0x2660 [ 31.582646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.583169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.583893] ? __pfx_lock_acquire+0x10/0x10 [ 31.584426] ? __pfx_mmap_region+0x10/0x10 [ 31.584969] ? security_mmap_addr+0x7d/0xa0 [ 31.585517] ? get_unmapped_area+0x1f5/0x3f0 [ 31.586089] do_mmap+0x854/0xf00 [ 31.586536] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.587058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.587637] ksys_mmap_pgoff+0x3af/0x500 [ 31.588153] do_syscall_64+0x3f/0x90 [ 31.588637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589298] RIP: 0033:0x7fade6a2cd82 [ 31.589757] 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 [ 31.591948] RSP: 002b:00007fff628d3398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.592880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fade6a2cd82 [ 31.593746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fade5e66000 [ 31.594609] RBP: 00007fade5e66000 R08: 0000000000000009 R09: 0000000000001000 [ 31.595463] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ff850bec0 [ 31.596323] R13: 00007fff628d33b0 R14: 00007fff628d33e0 R15: 00007fff628d3740 [ 31.597209] [ 31.597504] [ 31.597729] Allocated by task 215: [ 31.598168] kasan_save_stack+0x22/0x50 [ 31.598690] kasan_set_track+0x25/0x30 [ 31.599220] __kasan_slab_alloc+0x59/0x70 [ 31.599748] kmem_cache_alloc+0x16b/0x370 [ 31.600264] vm_area_dup+0x20/0x160 [ 31.600731] __split_vma+0x170/0x950 [ 31.601216] split_vma+0xc6/0x110 [ 31.601663] mprotect_fixup+0x8d2/0xb30 [ 31.602170] do_mprotect_pkey+0x87e/0xd40 [ 31.602695] __x64_sys_mprotect+0x78/0xc0 [ 31.603235] do_syscall_64+0x3f/0x90 [ 31.603714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604365] [ 31.604583] Freed by task 215: [ 31.604979] kasan_save_stack+0x22/0x50 [ 31.605496] kasan_set_track+0x25/0x30 [ 31.605991] kasan_save_free_info+0x2b/0x50 [ 31.606527] __kasan_slab_free+0x10a/0x190 [ 31.607084] kmem_cache_free+0x10d/0x4d0 [ 31.607597] rcu_core+0x8c8/0x2860 [ 31.608050] __do_softirq+0x1b7/0x7d4 [ 31.608528] [ 31.608746] Last potentially related work creation: [ 31.609352] kasan_save_stack+0x22/0x50 [ 31.609863] __kasan_record_aux_stack+0x8e/0xa0 [ 31.610534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.611184] remove_vma+0x139/0x170 [ 31.611632] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.612201] do_vmi_munmap+0x1f1/0x2b0 [ 31.612699] __vm_munmap+0x138/0x3a0 [ 31.613175] __x64_sys_munmap+0x59/0x80 [ 31.613669] do_syscall_64+0x3f/0x90 [ 31.614147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614788] [ 31.615008] The buggy address belongs to the object at ffff8880181e09f8 [ 31.615008] which belongs to the cache vm_area_struct of size 168 [ 31.616484] The buggy address is located 88 bytes inside of [ 31.616484] freed 168-byte region [ffff8880181e09f8, ffff8880181e0aa0) [ 31.617885] [ 31.618103] The buggy address belongs to the physical page: [ 31.618765] page:00000000be4c068c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181e0 [ 31.619870] memcg:ffff888016bb1a01 [ 31.620295] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.620935] page_type: 0xffffffff() [ 31.621391] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.622308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bb1a01 [ 31.623219] page dumped because: kasan: bad access detected [ 31.623898] [ 31.624125] Memory state around the buggy address: [ 31.624716] ffff8880181e0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.625594] ffff8880181e0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.626467] >ffff8880181e0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.627343] ^ [ 31.628052] ffff8880181e0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.628923] ffff8880181e0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.629779] ================================================================== [ 31.630715] Disabling lock debugging due to kernel taint [ 34.444289] BUG: Bad rss-counter state mm:000000007f7ca250 type:MM_FILEPAGES val:33 [ 34.445274] BUG: Bad rss-counter state mm:000000007f7ca250 type:MM_ANONPAGES val:22 [ 34.926386] BUG: Bad rss-counter state mm:000000004f1ea347 type:MM_FILEPAGES val:33 [ 34.927482] BUG: Bad rss-counter state mm:000000004f1ea347 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25416' (ECDSA) to the list of known hosts. 2023/06/19 23:48:00 fuzzer started 2023/06/19 23:48:01 dialing manager at localhost:44161 2023/06/19 23:48:01 checking machine... 2023/06/19 23:48:01 checking revisions... [ 35.683602] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:48:01 testing simple program... [ 35.738428] cgroup: Unknown subsys name 'net' [ 35.805119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180f43b RCX=ffffffff86137501 RDX=1ffff1100d9c135a RSI=0000000000000000 RDI=ffffffff8180f43b RBP=ffffffff8180f43b RSP=ffff88806ce09a20 R8 =ffffffff86137542 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888018efb680 R15=ffff88800da56b00 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007fc28b153900 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=00007fc28b708650 CR3=000000001cdbe000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f84cade75f0 CR3=000000000f6e0000 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=fb7d505816a2d8b13347e282a1e96b03 XMM02=000000000011c6a0eff9b2d0a8fce9cb XMM03=000000000011c7702c67c8bc2e329bc3 XMM04=044a8693ad3f476300000000000ae988 XMM05=59d5b690e0af863b0000000000133b68 XMM06=00c3ffa147b8d85700000000001339f0 XMM07=e042d86d42eb936e00000000001241e0 XMM08=efbb6926a1d61517000000000011c770 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000