syzkaller login: [ 28.710933] BUG: Bad rss-counter state mm:000000002e728eec type:MM_FILEPAGES val:33 [ 28.711960] BUG: Bad rss-counter state mm:000000002e728eec type:MM_ANONPAGES val:22 [ 28.904719] ================================================================== [ 28.905629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.906576] Read of size 8 at addr ffff888009683058 by task sshd/220 [ 28.907364] [ 28.907586] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.908538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.909517] Call Trace: [ 28.909837] [ 28.910120] dump_stack_lvl+0x91/0xf0 [ 28.910614] print_report+0xcc/0x620 [ 28.911106] ? __virt_addr_valid+0x102/0x340 [ 28.911692] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912308] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912933] kasan_report+0xbe/0xf0 [ 28.913425] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.914068] vma_interval_tree_remove+0xc75/0xec0 [ 28.914694] vma_prepare+0xc54/0x11a0 [ 28.915193] __split_vma+0x5af/0x950 [ 28.915699] ? __pfx___split_vma+0x10/0x10 [ 28.916249] ? find_held_lock+0x2c/0x110 [ 28.916800] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.917387] ? lock_is_held_type+0x9f/0x120 [ 28.917949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.918581] ? mtree_range_walk+0x632/0x900 [ 28.919159] ? mas_walk+0x5c7/0x7c0 [ 28.919663] do_vmi_munmap+0x1f1/0x2b0 [ 28.920177] mmap_region+0x1f9/0x2660 [ 28.920677] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.921213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.921954] ? __pfx_lock_acquire+0x10/0x10 [ 28.922514] ? __pfx_mmap_region+0x10/0x10 [ 28.923063] ? security_mmap_addr+0x7d/0xa0 [ 28.923633] ? get_unmapped_area+0x1f5/0x3f0 [ 28.924205] do_mmap+0x854/0xf00 [ 28.924661] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.925178] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.925763] ksys_mmap_pgoff+0x3af/0x500 [ 28.926292] do_syscall_64+0x3f/0x90 [ 28.926791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927472] RIP: 0033:0x7f1a75ee7d82 [ 28.927942] 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 [ 28.930178] RSP: 002b:00007ffdba66b8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.931128] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a75ee7d82 [ 28.932035] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a75321000 [ 28.932928] RBP: 00007f1a75321000 R08: 0000000000000009 R09: 0000000000001000 [ 28.933819] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603fccbeb20 [ 28.934702] R13: 00007ffdba66b8c0 R14: 00007ffdba66b8f0 R15: 00007ffdba66bc50 [ 28.935605] [ 28.935918] [ 28.936144] Allocated by task 212: [ 28.936593] kasan_save_stack+0x22/0x50 [ 28.937123] kasan_set_track+0x25/0x30 [ 28.937642] __kasan_slab_alloc+0x59/0x70 [ 28.938190] kmem_cache_alloc+0x16b/0x370 [ 28.938738] vm_area_dup+0x20/0x160 [ 28.939218] __split_vma+0x170/0x950 [ 28.939736] split_vma+0xc6/0x110 [ 28.940197] mprotect_fixup+0x8d2/0xb30 [ 28.940718] do_mprotect_pkey+0x87e/0xd40 [ 28.941258] __x64_sys_mprotect+0x78/0xc0 [ 28.941802] do_syscall_64+0x3f/0x90 [ 28.942292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942964] [ 28.943187] Freed by task 203: [ 28.943610] kasan_save_stack+0x22/0x50 [ 28.944130] kasan_set_track+0x25/0x30 [ 28.944647] kasan_save_free_info+0x2b/0x50 [ 28.945208] __kasan_slab_free+0x10a/0x190 [ 28.945768] kmem_cache_free+0x10d/0x4d0 [ 28.946291] rcu_core+0x8c8/0x2860 [ 28.946760] __do_softirq+0x1b7/0x7d4 [ 28.947264] [ 28.947487] Last potentially related work creation: [ 28.948098] kasan_save_stack+0x22/0x50 [ 28.948619] __kasan_record_aux_stack+0x8e/0xa0 [ 28.949218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.949890] remove_vma+0x139/0x170 [ 28.950360] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.950934] do_vmi_munmap+0x1f1/0x2b0 [ 28.951463] __vm_munmap+0x138/0x3a0 [ 28.951949] __x64_sys_munmap+0x59/0x80 [ 28.952469] do_syscall_64+0x3f/0x90 [ 28.952968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.953642] [ 28.953867] Second to last potentially related work creation: [ 28.954585] kasan_save_stack+0x22/0x50 [ 28.955108] __kasan_record_aux_stack+0x8e/0xa0 [ 28.955722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.956401] remove_vma+0x139/0x170 [ 28.956876] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.957461] do_vmi_munmap+0x1f1/0x2b0 [ 28.957973] mmap_region+0x1f9/0x2660 [ 28.958468] do_mmap+0x854/0xf00 [ 28.958918] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.959430] ksys_mmap_pgoff+0x3af/0x500 [ 28.959952] do_syscall_64+0x3f/0x90 [ 28.960450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961116] [ 28.961340] The buggy address belongs to the object at ffff888009683000 [ 28.961340] which belongs to the cache vm_area_struct of size 168 [ 28.962876] The buggy address is located 88 bytes inside of [ 28.962876] freed 168-byte region [ffff888009683000, ffff8880096830a8) [ 28.964364] [ 28.964587] The buggy address belongs to the physical page: [ 28.965277] page:00000000bc0078ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9683 [ 28.966409] memcg:ffff88800d7a9d01 [ 28.966851] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.967527] page_type: 0xffffffff() [ 28.967995] raw: 0100000000000200 ffff8880087a0c80 ffffea0000374240 dead000000000008 [ 28.968957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7a9d01 [ 28.969901] page dumped because: kasan: bad access detected [ 28.970595] [ 28.970823] Memory state around the buggy address: [ 28.971449] ffff888009682f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.972342] ffff888009682f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.973246] >ffff888009683000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.974140] ^ [ 28.974908] ffff888009683080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.975819] ffff888009683100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.976719] ================================================================== [ 28.977813] Disabling lock debugging due to kernel taint [ 30.855423] BUG: Bad rss-counter state mm:00000000a934475e type:MM_FILEPAGES val:33 [ 30.856706] BUG: Bad rss-counter state mm:00000000a934475e type:MM_ANONPAGES val:22 [ 31.315555] BUG: Bad rss-counter state mm:00000000ad413202 type:MM_FILEPAGES val:33 [ 31.316770] BUG: Bad rss-counter state mm:00000000ad413202 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61394' (ECDSA) to the list of known hosts. 2023/06/20 17:15:19 fuzzer started 2023/06/20 17:15:20 dialing manager at localhost:36067 2023/06/20 17:15:20 checking machine... 2023/06/20 17:15:20 checking revisions... [ 32.070490] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:15:20 testing simple program... [ 32.126867] cgroup: Unknown subsys name 'net' [ 32.168209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:15:19 Registers: info registers vcpu 0 RAX=ffff8880162551c0 RBX=ffff8880168af408 RCX=ffffffff81132ffe RDX=ffff8880168af320 RSI=0000000000000000 RDI=ffff8880168af3e0 RBP=ffff8880162551c0 RSP=ffff8880168af320 R8 =ffff8880168af6b0 R9 =0000000000000000 R10=ffff8880168af370 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880168af398 R14=ffff8880168af3b8 R15=ffff8880168af370 RIP=ffffffff81133010 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 00007f41dad41900 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=00007f41db2f8618 CR3=000000001a376000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff81803bfc R14=ffffffff818d9c06 R15=ffff88800df33c00 RIP=ffffffff812d86ea 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 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=00007f04bb8f0430 CR3=000000000da24000 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=e5fe3f49c42d9897fd429fb7ff3061c3 XMM02=ec2efd57dc4c00df000000000011b3b8 XMM03=852146350e35c815000000000011b488 XMM04=de722cba748aacb900000000000ae988 XMM05=19e9129bd510f23500000000001332f8 XMM06=45b10aa068f1be090000000000132160 XMM07=e042d86d42eb936e0000000000121c80 XMM08=852146350e35c815000000000011b488 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000