syzkaller login: [ 32.173413] BUG: Bad rss-counter state mm:000000007d43f727 type:MM_FILEPAGES val:33 [ 32.174350] BUG: Bad rss-counter state mm:000000007d43f727 type:MM_ANONPAGES val:22 [ 32.343759] ================================================================== [ 32.344820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.345755] Read of size 8 at addr ffff888019dee058 by task sshd/219 [ 32.346595] [ 32.346804] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.347611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.348547] Call Trace: [ 32.348848] [ 32.349117] dump_stack_lvl+0x91/0xf0 [ 32.349593] print_report+0xcc/0x620 [ 32.350051] ? __virt_addr_valid+0x102/0x340 [ 32.350579] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.351161] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.351744] kasan_report+0xbe/0xf0 [ 32.352225] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.352922] vma_interval_tree_remove+0xc75/0xec0 [ 32.353720] vma_prepare+0xc54/0x11a0 [ 32.354365] __split_vma+0x5af/0x950 [ 32.355016] ? __pfx___split_vma+0x10/0x10 [ 32.355741] ? find_held_lock+0x2c/0x110 [ 32.356462] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.357230] ? lock_is_held_type+0x9f/0x120 [ 32.357962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.358797] ? mtree_range_walk+0x632/0x900 [ 32.359541] ? mas_walk+0x5c7/0x7c0 [ 32.360206] do_vmi_munmap+0x1f1/0x2b0 [ 32.360880] mmap_region+0x1f9/0x2660 [ 32.361544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.362216] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.363061] ? __pfx_lock_acquire+0x10/0x10 [ 32.363599] ? __pfx_mmap_region+0x10/0x10 [ 32.364120] ? security_mmap_addr+0x7d/0xa0 [ 32.364626] ? get_unmapped_area+0x1f5/0x3f0 [ 32.365149] do_mmap+0x854/0xf00 [ 32.365568] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.366039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.366573] ksys_mmap_pgoff+0x3af/0x500 [ 32.367051] do_syscall_64+0x3f/0x90 [ 32.367509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.368124] RIP: 0033:0x7f40d9017d82 [ 32.368571] 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 [ 32.370584] RSP: 002b:00007ffc330ede28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.371502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40d9017d82 [ 32.372513] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40d8451000 [ 32.373509] RBP: 00007f40d8451000 R08: 0000000000000009 R09: 0000000000001000 [ 32.374505] R10: 0000000000000812 R11: 0000000000000206 R12: 000055717e19fd90 [ 32.375507] R13: 00007ffc330ede40 R14: 00007ffc330ede70 R15: 00007ffc330ee1d0 [ 32.376535] [ 32.376880] [ 32.377132] Allocated by task 212: [ 32.377638] kasan_save_stack+0x22/0x50 [ 32.378230] kasan_set_track+0x25/0x30 [ 32.378818] __kasan_slab_alloc+0x59/0x70 [ 32.379440] kmem_cache_alloc+0x16b/0x370 [ 32.380055] vm_area_dup+0x20/0x160 [ 32.380594] __split_vma+0x170/0x950 [ 32.381148] split_vma+0xc6/0x110 [ 32.381669] mprotect_fixup+0x8d2/0xb30 [ 32.382259] do_mprotect_pkey+0x87e/0xd40 [ 32.382874] __x64_sys_mprotect+0x78/0xc0 [ 32.383492] do_syscall_64+0x3f/0x90 [ 32.384058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.384817] [ 32.385069] Freed by task 202: [ 32.385532] kasan_save_stack+0x22/0x50 [ 32.386124] kasan_set_track+0x25/0x30 [ 32.386710] kasan_save_free_info+0x2b/0x50 [ 32.387339] __kasan_slab_free+0x10a/0x190 [ 32.387971] kmem_cache_free+0x10d/0x4d0 [ 32.388608] rcu_core+0x8c8/0x2860 [ 32.389131] __do_softirq+0x1b7/0x7d4 [ 32.389690] [ 32.389940] Last potentially related work creation: [ 32.390635] kasan_save_stack+0x22/0x50 [ 32.391227] __kasan_record_aux_stack+0x8e/0xa0 [ 32.391902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.392669] remove_vma+0x139/0x170 [ 32.393199] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.393859] do_vmi_munmap+0x1f1/0x2b0 [ 32.394431] __vm_munmap+0x138/0x3a0 [ 32.394980] __x64_sys_munmap+0x59/0x80 [ 32.395564] do_syscall_64+0x3f/0x90 [ 32.396142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.396896] [ 32.397147] The buggy address belongs to the object at ffff888019dee000 [ 32.397147] which belongs to the cache vm_area_struct of size 168 [ 32.398885] The buggy address is located 88 bytes inside of [ 32.398885] freed 168-byte region [ffff888019dee000, ffff888019dee0a8) [ 32.400566] [ 32.400819] The buggy address belongs to the physical page: [ 32.401598] page:0000000097f093dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dee [ 32.402883] memcg:ffff88800eff4501 [ 32.403390] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.404159] page_type: 0xffffffff() [ 32.404687] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.405766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eff4501 [ 32.406841] page dumped because: kasan: bad access detected [ 32.407619] [ 32.407870] Memory state around the buggy address: [ 32.408570] ffff888019dedf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.409580] ffff888019dedf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.410593] >ffff888019dee000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.411597] ^ [ 32.412463] ffff888019dee080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.413487] ffff888019dee100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.414490] ================================================================== [ 32.415672] Disabling lock debugging due to kernel taint [ 34.338608] BUG: Bad rss-counter state mm:00000000cdf3ce60 type:MM_FILEPAGES val:33 [ 34.339817] BUG: Bad rss-counter state mm:00000000cdf3ce60 type:MM_ANONPAGES val:22 [ 34.879834] BUG: Bad rss-counter state mm:000000004f1560ce type:MM_FILEPAGES val:33 [ 34.881013] BUG: Bad rss-counter state mm:000000004f1560ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29866' (ECDSA) to the list of known hosts. 2023/06/20 07:52:20 fuzzer started 2023/06/20 07:52:20 dialing manager at localhost:44161 2023/06/20 07:52:20 checking machine... 2023/06/20 07:52:20 checking revisions... [ 35.545908] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:52:20 testing simple program... [ 35.597650] cgroup: Unknown subsys name 'net' [ 35.636805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:52:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801656f6f8 RCX=0000000000000001 RDX=1ffff11002cadef2 RSI=ffffffff81acbf17 RDI=ffff88801656f704 RBP=ffff88801656f790 RSP=ffff88801656f610 R8 =0000000000000001 R9 =ffff88801656f670 R10=0000000000038001 R11=000000000002f6f5 R12=ffff88801656f6f8 R13=0000000000000000 R14=ffff88800febd1c0 R15=ffff88800c97b260 RIP=ffffffff813ad4f7 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 00007f5d33d63700 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=00007f82874e29d0 CR3=000000000b9c2000 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=2039313a32353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a32353a3730203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007fff0d911000 CR3=000000000eb9c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000