syzkaller login: [ 31.080837] BUG: Bad rss-counter state mm:00000000da9e5cdf type:MM_FILEPAGES val:33 [ 31.082261] BUG: Bad rss-counter state mm:00000000da9e5cdf type:MM_ANONPAGES val:22 [ 31.232880] ================================================================== [ 31.233848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.234853] Read of size 8 at addr ffff888019527140 by task sshd/222 [ 31.235760] [ 31.235992] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237983] Call Trace: [ 31.238326] [ 31.238637] dump_stack_lvl+0x91/0xf0 [ 31.239168] print_report+0xcc/0x620 [ 31.239685] ? __virt_addr_valid+0x102/0x340 [ 31.240274] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241594] kasan_report+0xbe/0xf0 [ 31.242118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242785] vma_interval_tree_remove+0xc75/0xec0 [ 31.243432] vma_prepare+0xc54/0x11a0 [ 31.243944] __split_vma+0x5af/0x950 [ 31.244449] ? __pfx___split_vma+0x10/0x10 [ 31.245013] ? find_held_lock+0x2c/0x110 [ 31.245577] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.246208] ? lock_is_held_type+0x9f/0x120 [ 31.246788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.247448] ? mtree_range_walk+0x632/0x900 [ 31.248043] ? mas_walk+0x5c7/0x7c0 [ 31.248556] do_vmi_munmap+0x1f1/0x2b0 [ 31.249086] mmap_region+0x1f9/0x2660 [ 31.249603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.250174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.250965] ? __pfx_lock_acquire+0x10/0x10 [ 31.251557] ? __pfx_mmap_region+0x10/0x10 [ 31.252141] ? security_mmap_addr+0x7d/0xa0 [ 31.252732] ? get_unmapped_area+0x1f5/0x3f0 [ 31.253337] do_mmap+0x854/0xf00 [ 31.253843] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.254393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.255013] ksys_mmap_pgoff+0x3af/0x500 [ 31.255579] do_syscall_64+0x3f/0x90 [ 31.256109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256828] RIP: 0033:0x7f17d8a4ed82 [ 31.257335] 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 [ 31.259708] RSP: 002b:00007ffe88b56bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.260714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17d8a4ed82 [ 31.261655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17d7e88000 [ 31.262603] RBP: 00007f17d7e88000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263543] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555ef534f60 [ 31.264472] R13: 00007ffe88b56bf0 R14: 00007ffe88b56c20 R15: 00007ffe88b56f80 [ 31.265424] [ 31.265751] [ 31.266005] Allocated by task 215: [ 31.266483] kasan_save_stack+0x22/0x50 [ 31.267040] kasan_set_track+0x25/0x30 [ 31.267588] __kasan_slab_alloc+0x59/0x70 [ 31.268169] kmem_cache_alloc+0x16b/0x370 [ 31.268739] vm_area_dup+0x20/0x160 [ 31.269239] __split_vma+0x170/0x950 [ 31.269759] split_vma+0xc6/0x110 [ 31.270250] mprotect_fixup+0x8d2/0xb30 [ 31.270804] do_mprotect_pkey+0x87e/0xd40 [ 31.271382] __x64_sys_mprotect+0x78/0xc0 [ 31.271962] do_syscall_64+0x3f/0x90 [ 31.272488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273205] [ 31.273442] Freed by task 215: [ 31.273890] kasan_save_stack+0x22/0x50 [ 31.274445] kasan_set_track+0x25/0x30 [ 31.274992] kasan_save_free_info+0x2b/0x50 [ 31.275578] __kasan_slab_free+0x10a/0x190 [ 31.276175] kmem_cache_free+0x10d/0x4d0 [ 31.276740] rcu_core+0x8c8/0x2860 [ 31.277229] __do_softirq+0x1b7/0x7d4 [ 31.277760] [ 31.278008] Last potentially related work creation: [ 31.278657] kasan_save_stack+0x22/0x50 [ 31.279215] __kasan_record_aux_stack+0x8e/0xa0 [ 31.279853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.280563] remove_vma+0x139/0x170 [ 31.281066] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.281680] do_vmi_munmap+0x1f1/0x2b0 [ 31.282233] __vm_munmap+0x138/0x3a0 [ 31.282754] __x64_sys_munmap+0x59/0x80 [ 31.283305] do_syscall_64+0x3f/0x90 [ 31.283836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284555] [ 31.284791] The buggy address belongs to the object at ffff8880195270e8 [ 31.284791] which belongs to the cache vm_area_struct of size 168 [ 31.286437] The buggy address is located 88 bytes inside of [ 31.286437] freed 168-byte region [ffff8880195270e8, ffff888019527190) [ 31.287996] [ 31.288234] The buggy address belongs to the physical page: [ 31.288968] page:00000000dd5b7ce0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19527 [ 31.290188] memcg:ffff888018731f01 [ 31.290662] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.291382] page_type: 0xffffffff() [ 31.291886] raw: 0100000000000200 ffff8880087a0c80 ffffea0000242500 dead000000000006 [ 31.292913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018731f01 [ 31.293937] page dumped because: kasan: bad access detected [ 31.294672] [ 31.294910] Memory state around the buggy address: [ 31.295558] ffff888019527000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.296509] ffff888019527080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.297462] >ffff888019527100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.298420] ^ [ 31.299130] ffff888019527180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.300088] ffff888019527200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.301042] ================================================================== [ 31.302255] Disabling lock debugging due to kernel taint [ 33.299746] BUG: Bad rss-counter state mm:00000000a99756d7 type:MM_FILEPAGES val:33 [ 33.300665] BUG: Bad rss-counter state mm:00000000a99756d7 type:MM_ANONPAGES val:22 [ 33.779839] BUG: Bad rss-counter state mm:000000006dc12121 type:MM_FILEPAGES val:33 [ 33.781018] BUG: Bad rss-counter state mm:000000006dc12121 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32716' (ECDSA) to the list of known hosts. 2023/06/21 04:32:03 fuzzer started 2023/06/21 04:32:03 dialing manager at localhost:36067 2023/06/21 04:32:03 checking machine... 2023/06/21 04:32:03 checking revisions... [ 34.516470] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:32:03 testing simple program... [ 34.570471] cgroup: Unknown subsys name 'net' [ 34.617513] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:32:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000100 RDX=ffff888008d90000 RSI=ffffffff814129cc RDI=0000000000000001 RBP=0000000000000001 RSP=ffff888008d9fc08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=1ffff1100d9c7479 R12=0000000000000001 R13=ffffffff8124d711 R14=ffff888008d91b54 R15=0000000000000000 RIP=ffffffff814129cc 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 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=00007fbc29b3ddc0 CR3=0000000019776000 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=2033303a32333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010002 RBX=1ffff1100d9e5755 RCX=0000000000000000 RDX=ffff888015a351c0 RSI=ffffffff813cb498 RDI=ffff88806cf2b988 RBP=ffff88806cf2b988 RSP=ffff88806cf09ed0 R8 =0000000000000001 R9 =ffffed100d9e13d6 R10=0000000000000003 R11=ffff88806cf09ff8 R12=0000000000000046 R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=ffff88806cf2b940 RIP=ffffffff813cb499 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 00007ff2be108900 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=00007ffec228c000 CR3=0000000015b34000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000