syzkaller login: [ 31.017290] BUG: Bad rss-counter state mm:00000000bd4c445d type:MM_FILEPAGES val:33 [ 31.018559] BUG: Bad rss-counter state mm:00000000bd4c445d type:MM_ANONPAGES val:22 [ 31.184199] ================================================================== [ 31.185212] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.186149] Read of size 8 at addr ffff88800d85b880 by task sshd/222 [ 31.187006] [ 31.187227] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.188099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.189118] Call Trace: [ 31.189439] [ 31.189728] dump_stack_lvl+0x91/0xf0 [ 31.190217] print_report+0xcc/0x620 [ 31.190710] ? __virt_addr_valid+0x102/0x340 [ 31.191268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191884] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192512] kasan_report+0xbe/0xf0 [ 31.192992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193603] vma_interval_tree_remove+0xc75/0xec0 [ 31.194210] vma_prepare+0xc54/0x11a0 [ 31.194695] __split_vma+0x5af/0x950 [ 31.195162] ? __pfx___split_vma+0x10/0x10 [ 31.195693] ? find_held_lock+0x2c/0x110 [ 31.196219] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.196796] ? lock_is_held_type+0x9f/0x120 [ 31.197341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.197951] ? mtree_range_walk+0x632/0x900 [ 31.198502] ? mas_walk+0x5c7/0x7c0 [ 31.198977] do_vmi_munmap+0x1f1/0x2b0 [ 31.199474] mmap_region+0x1f9/0x2660 [ 31.199955] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.200471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.201197] ? __pfx_lock_acquire+0x10/0x10 [ 31.201737] ? __pfx_mmap_region+0x10/0x10 [ 31.202265] ? security_mmap_addr+0x7d/0xa0 [ 31.202800] ? get_unmapped_area+0x1f5/0x3f0 [ 31.203351] do_mmap+0x854/0xf00 [ 31.203787] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.204300] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204861] ksys_mmap_pgoff+0x3af/0x500 [ 31.205371] do_syscall_64+0x3f/0x90 [ 31.205851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206502] RIP: 0033:0x7f5af77b1d82 [ 31.206964] 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 [ 31.209119] RSP: 002b:00007ffc6669f2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5af77b1d82 [ 31.210891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5af6beb000 [ 31.211741] RBP: 00007f5af6beb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.212596] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d67835eec0 [ 31.213439] R13: 00007ffc6669f310 R14: 00007ffc6669f340 R15: 00007ffc6669f6a0 [ 31.214301] [ 31.214594] [ 31.214809] Allocated by task 215: [ 31.215242] kasan_save_stack+0x22/0x50 [ 31.215743] kasan_set_track+0x25/0x30 [ 31.216261] __kasan_slab_alloc+0x59/0x70 [ 31.216786] kmem_cache_alloc+0x16b/0x370 [ 31.217309] vm_area_dup+0x20/0x160 [ 31.217760] __split_vma+0x170/0x950 [ 31.218234] split_vma+0xc6/0x110 [ 31.218681] mprotect_fixup+0x8d2/0xb30 [ 31.219188] do_mprotect_pkey+0x87e/0xd40 [ 31.219712] __x64_sys_mprotect+0x78/0xc0 [ 31.220236] do_syscall_64+0x3f/0x90 [ 31.220727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221373] [ 31.221589] Freed by task 215: [ 31.221988] kasan_save_stack+0x22/0x50 [ 31.222495] kasan_set_track+0x25/0x30 [ 31.222995] kasan_save_free_info+0x2b/0x50 [ 31.223528] __kasan_slab_free+0x10a/0x190 [ 31.224069] kmem_cache_free+0x10d/0x4d0 [ 31.224583] rcu_core+0x8c8/0x2860 [ 31.225030] __do_softirq+0x1b7/0x7d4 [ 31.225514] [ 31.225730] Last potentially related work creation: [ 31.226324] kasan_save_stack+0x22/0x50 [ 31.226828] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228056] remove_vma+0x139/0x170 [ 31.228524] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229089] do_vmi_munmap+0x1f1/0x2b0 [ 31.229575] __vm_munmap+0x138/0x3a0 [ 31.230052] __x64_sys_munmap+0x59/0x80 [ 31.230554] do_syscall_64+0x3f/0x90 [ 31.231032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231688] [ 31.231909] The buggy address belongs to the object at ffff88800d85b828 [ 31.231909] which belongs to the cache vm_area_struct of size 168 [ 31.233395] The buggy address is located 88 bytes inside of [ 31.233395] freed 168-byte region [ffff88800d85b828, ffff88800d85b8d0) [ 31.234807] [ 31.235026] The buggy address belongs to the physical page: [ 31.235694] page:000000007cd08dff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd85b [ 31.236794] memcg:ffff888009612701 [ 31.237225] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.237869] page_type: 0xffffffff() [ 31.238319] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.239237] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009612701 [ 31.240148] page dumped because: kasan: bad access detected [ 31.240828] [ 31.241043] Memory state around the buggy address: [ 31.241633] ffff88800d85b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.242510] ffff88800d85b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.243370] >ffff88800d85b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.244227] ^ [ 31.244653] ffff88800d85b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.245508] ffff88800d85b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.246362] ================================================================== [ 31.247341] Disabling lock debugging due to kernel taint [ 34.107594] BUG: Bad rss-counter state mm:00000000b56394fd type:MM_FILEPAGES val:33 [ 34.108604] BUG: Bad rss-counter state mm:00000000b56394fd type:MM_ANONPAGES val:22 [ 34.572566] BUG: Bad rss-counter state mm:000000006eeb5ce1 type:MM_FILEPAGES val:33 [ 34.573552] BUG: Bad rss-counter state mm:000000006eeb5ce1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64015' (ECDSA) to the list of known hosts. 2023/06/20 15:29:42 fuzzer started 2023/06/20 15:29:43 dialing manager at localhost:36067 2023/06/20 15:29:43 checking machine... 2023/06/20 15:29:43 checking revisions... [ 35.316944] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:29:43 testing simple program... [ 35.359678] cgroup: Unknown subsys name 'net' [ 35.414711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000122268 RCX=00007f0aa52c2344 RDX=00007ffe7188c758 RSI=00007ffe7188c758 RDI=000055cb2cdc8330 RBP=00007ffe7188c7d8 RSP=00007ffe7188c750 R8 =0000000000000058 R9 =0000000000122268 R10=0000000000000002 R11=00007f0aa3c5d030 R12=00007f0aa3c4c268 R13=000055cb2cdc7400 R14=0000000000000006 R15=00007ffe7188c760 RIP=00007f0aa52c2475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0aa473f900 00000000 00000000 GS =0000 0000000000000000 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=00007f0aa3c5d000 CR3=000000000c660000 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=b3285ca56c489dff000000000010b080 XMM01=239757b02066d6aa05483b9fed07f838 XMM02=ec2efd57dc4c00df000000000011a028 XMM03=84b5e97816eee8a9000000000011a0f8 XMM04=aacc01c7b114603300000000000ae988 XMM05=59d5b690e0af863b0000000000131b38 XMM06=a484ab0243e07f2700000000001309a0 XMM07=e042d86d42eb936e0000000000121f60 XMM08=84b5e97816eee8a9000000000011a0f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffd988b0388 CR3=000000000e10a000 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=2032343a39323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39323a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000