syzkaller login: [ 30.707671] BUG: Bad rss-counter state mm:00000000eec1f448 type:MM_FILEPAGES val:33 [ 30.708875] BUG: Bad rss-counter state mm:00000000eec1f448 type:MM_ANONPAGES val:22 [ 30.749584] ================================================================== [ 30.750499] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751441] Read of size 8 at addr ffff88800ebb6d08 by task sshd/219 [ 30.752383] [ 30.752617] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.753500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.754527] Call Trace: [ 30.754849] [ 30.755134] dump_stack_lvl+0x91/0xf0 [ 30.755635] print_report+0xcc/0x620 [ 30.756125] ? __virt_addr_valid+0x102/0x340 [ 30.756692] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757319] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757951] kasan_report+0xbe/0xf0 [ 30.758440] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759066] vma_interval_tree_remove+0xc75/0xec0 [ 30.759672] vma_prepare+0xc54/0x11a0 [ 30.760149] __split_vma+0x5af/0x950 [ 30.760658] ? __pfx___split_vma+0x10/0x10 [ 30.761193] ? find_held_lock+0x2c/0x110 [ 30.761724] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.762291] ? lock_is_held_type+0x9f/0x120 [ 30.762834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.763442] ? mtree_range_walk+0x632/0x900 [ 30.764005] ? mas_walk+0x5c7/0x7c0 [ 30.764485] do_vmi_munmap+0x1f1/0x2b0 [ 30.764986] mmap_region+0x1f9/0x2660 [ 30.765476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.766695] ? __pfx_lock_acquire+0x10/0x10 [ 30.767238] ? __pfx_mmap_region+0x10/0x10 [ 30.767774] ? security_mmap_addr+0x7d/0xa0 [ 30.768308] ? get_unmapped_area+0x1f5/0x3f0 [ 30.768884] do_mmap+0x854/0xf00 [ 30.769327] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.769826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.770393] ksys_mmap_pgoff+0x3af/0x500 [ 30.770914] do_syscall_64+0x3f/0x90 [ 30.771408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772063] RIP: 0033:0x7ff7e4174d82 [ 30.772540] 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 [ 30.774731] RSP: 002b:00007fff4151d9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.775636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7e4174d82 [ 30.776496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7e35ae000 [ 30.777383] RBP: 00007ff7e35ae000 R08: 0000000000000009 R09: 0000000000001000 [ 30.778233] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a40f7c3ec0 [ 30.779078] R13: 00007fff4151d9e0 R14: 00007fff4151da10 R15: 00007fff4151dd70 [ 30.779937] [ 30.780235] [ 30.780449] Allocated by task 212: [ 30.780890] kasan_save_stack+0x22/0x50 [ 30.781396] kasan_set_track+0x25/0x30 [ 30.781891] __kasan_slab_alloc+0x59/0x70 [ 30.782418] kmem_cache_alloc+0x16b/0x370 [ 30.782931] vm_area_dup+0x20/0x160 [ 30.783388] __split_vma+0x170/0x950 [ 30.783858] split_vma+0xc6/0x110 [ 30.784300] mprotect_fixup+0x8d2/0xb30 [ 30.784809] do_mprotect_pkey+0x87e/0xd40 [ 30.785336] __x64_sys_mprotect+0x78/0xc0 [ 30.785864] do_syscall_64+0x3f/0x90 [ 30.786344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786990] [ 30.787206] Freed by task 212: [ 30.787605] kasan_save_stack+0x22/0x50 [ 30.788105] kasan_set_track+0x25/0x30 [ 30.788620] kasan_save_free_info+0x2b/0x50 [ 30.789151] __kasan_slab_free+0x10a/0x190 [ 30.789690] kmem_cache_free+0x10d/0x4d0 [ 30.790197] rcu_core+0x8c8/0x2860 [ 30.790641] __do_softirq+0x1b7/0x7d4 [ 30.791239] [ 30.791454] Last potentially related work creation: [ 30.792042] kasan_save_stack+0x22/0x50 [ 30.792549] __kasan_record_aux_stack+0x8e/0xa0 [ 30.793126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.793770] remove_vma+0x139/0x170 [ 30.794226] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794781] do_vmi_munmap+0x1f1/0x2b0 [ 30.795271] __vm_munmap+0x138/0x3a0 [ 30.795743] __x64_sys_munmap+0x59/0x80 [ 30.796239] do_syscall_64+0x3f/0x90 [ 30.796729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797371] [ 30.797586] The buggy address belongs to the object at ffff88800ebb6cb0 [ 30.797586] which belongs to the cache vm_area_struct of size 168 [ 30.799056] The buggy address is located 88 bytes inside of [ 30.799056] freed 168-byte region [ffff88800ebb6cb0, ffff88800ebb6d58) [ 30.800465] [ 30.800696] The buggy address belongs to the physical page: [ 30.801357] page:0000000041e6fd81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebb6 [ 30.802453] memcg:ffff88800c5d3f01 [ 30.802887] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803537] page_type: 0xffffffff() [ 30.803989] raw: 0100000000000200 ffff8880087a0c80 ffffea00003826c0 dead000000000004 [ 30.804941] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5d3f01 [ 30.805856] page dumped because: kasan: bad access detected [ 30.806510] [ 30.806728] Memory state around the buggy address: [ 30.807303] ffff88800ebb6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.808156] ffff88800ebb6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.809025] >ffff88800ebb6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.809908] ^ [ 30.810353] ffff88800ebb6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.811225] ffff88800ebb6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.812088] ================================================================== [ 30.813020] Disabling lock debugging due to kernel taint [ 33.547210] BUG: Bad rss-counter state mm:00000000820f8464 type:MM_FILEPAGES val:33 [ 33.548192] BUG: Bad rss-counter state mm:00000000820f8464 type:MM_ANONPAGES val:22 [ 34.020527] BUG: Bad rss-counter state mm:00000000ed0a0f0c type:MM_FILEPAGES val:33 [ 34.021636] BUG: Bad rss-counter state mm:00000000ed0a0f0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62577' (ECDSA) to the list of known hosts. 2023/06/21 07:35:53 fuzzer started 2023/06/21 07:35:53 dialing manager at localhost:36067 2023/06/21 07:35:53 checking machine... 2023/06/21 07:35:53 checking revisions... [ 34.747066] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:35:53 testing simple program... [ 34.793138] cgroup: Unknown subsys name 'net' [ 34.831745] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:53 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8107f98e RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888018ed8000 RSP=ffff888019f8fa10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888015d98000 R13=0000000000000000 R14=ffff888015d995c0 R15=ffff888015d99680 RIP=ffffffff8107f98e 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 00007f9463e99700 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=00007f0e0baeead0 CR3=0000000018ca4000 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=35333a3730203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8608a55b RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85d899f8 RBP=ffff8880102475d8 RSP=ffff8880102474c0 R8 =ffffffff8608a556 R9 =ffff8880102475c0 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880102475e0 R13=ffff8880102475c8 R14=ffff8880102475c1 R15=ffff888010247580 RIP=ffffffff81130a72 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 00007f2fdb2a0900 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=00007ffee92d9000 CR3=000000001bde2000 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