syzkaller login: [ 31.042344] BUG: Bad rss-counter state mm:00000000ac490e63 type:MM_FILEPAGES val:33 [ 31.044179] BUG: Bad rss-counter state mm:00000000ac490e63 type:MM_ANONPAGES val:22 [ 31.221598] ================================================================== [ 31.222576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.223555] Read of size 8 at addr ffff888019f5a3f8 by task sshd/220 [ 31.224466] [ 31.224696] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.225611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.226657] Call Trace: [ 31.226997] [ 31.227301] dump_stack_lvl+0x91/0xf0 [ 31.227819] print_report+0xcc/0x620 [ 31.228330] ? __virt_addr_valid+0x102/0x340 [ 31.228904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.229554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230201] kasan_report+0xbe/0xf0 [ 31.230720] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231385] vma_interval_tree_remove+0xc75/0xec0 [ 31.232034] vma_prepare+0xc54/0x11a0 [ 31.232553] __split_vma+0x5af/0x950 [ 31.233065] ? __pfx___split_vma+0x10/0x10 [ 31.233631] ? find_held_lock+0x2c/0x110 [ 31.234188] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.234799] ? lock_is_held_type+0x9f/0x120 [ 31.235378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.236033] ? mtree_range_walk+0x632/0x900 [ 31.236621] ? mas_walk+0x5c7/0x7c0 [ 31.237132] do_vmi_munmap+0x1f1/0x2b0 [ 31.237672] mmap_region+0x1f9/0x2660 [ 31.238186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.238750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.239506] ? __pfx_lock_acquire+0x10/0x10 [ 31.240081] ? __pfx_mmap_region+0x10/0x10 [ 31.240649] ? security_mmap_addr+0x7d/0xa0 [ 31.241215] ? get_unmapped_area+0x1f5/0x3f0 [ 31.241794] do_mmap+0x854/0xf00 [ 31.242260] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.242806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.243410] ksys_mmap_pgoff+0x3af/0x500 [ 31.243955] do_syscall_64+0x3f/0x90 [ 31.244468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245160] RIP: 0033:0x7f8fa4b2cd82 [ 31.245646] 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 [ 31.247927] RSP: 002b:00007ffcd4369458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.248887] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fa4b2cd82 [ 31.249787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fa3f66000 [ 31.250696] RBP: 00007f8fa3f66000 R08: 0000000000000009 R09: 0000000000001000 [ 31.251588] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558dc3131ec0 [ 31.252481] R13: 00007ffcd4369470 R14: 00007ffcd43694a0 R15: 00007ffcd4369800 [ 31.253393] [ 31.253714] [ 31.253946] Allocated by task 213: [ 31.254408] kasan_save_stack+0x22/0x50 [ 31.254946] kasan_set_track+0x25/0x30 [ 31.255469] __kasan_slab_alloc+0x59/0x70 [ 31.256032] kmem_cache_alloc+0x16b/0x370 [ 31.256585] vm_area_dup+0x20/0x160 [ 31.257069] __split_vma+0x170/0x950 [ 31.257572] split_vma+0xc6/0x110 [ 31.258042] mprotect_fixup+0x8d2/0xb30 [ 31.258592] do_mprotect_pkey+0x87e/0xd40 [ 31.259142] __x64_sys_mprotect+0x78/0xc0 [ 31.259697] do_syscall_64+0x3f/0x90 [ 31.260202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260890] [ 31.261120] Freed by task 213: [ 31.261544] kasan_save_stack+0x22/0x50 [ 31.262084] kasan_set_track+0x25/0x30 [ 31.262612] kasan_save_free_info+0x2b/0x50 [ 31.263181] __kasan_slab_free+0x10a/0x190 [ 31.263752] kmem_cache_free+0x10d/0x4d0 [ 31.264299] rcu_core+0x8c8/0x2860 [ 31.264770] __do_softirq+0x1b7/0x7d4 [ 31.265282] [ 31.265508] Last potentially related work creation: [ 31.266132] kasan_save_stack+0x22/0x50 [ 31.266686] __kasan_record_aux_stack+0x8e/0xa0 [ 31.267292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.267979] remove_vma+0x139/0x170 [ 31.268469] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.269071] do_vmi_munmap+0x1f1/0x2b0 [ 31.269597] __vm_munmap+0x138/0x3a0 [ 31.270099] __x64_sys_munmap+0x59/0x80 [ 31.270643] do_syscall_64+0x3f/0x90 [ 31.271146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271829] [ 31.272054] The buggy address belongs to the object at ffff888019f5a3a0 [ 31.272054] which belongs to the cache vm_area_struct of size 168 [ 31.273602] The buggy address is located 88 bytes inside of [ 31.273602] freed 168-byte region [ffff888019f5a3a0, ffff888019f5a448) [ 31.275090] [ 31.275322] The buggy address belongs to the physical page: [ 31.276019] page:0000000007bed6b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f5a [ 31.277173] memcg:ffff8880190ddc01 [ 31.277632] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.278314] page_type: 0xffffffff() [ 31.278808] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.279784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880190ddc01 [ 31.280745] page dumped because: kasan: bad access detected [ 31.281449] [ 31.281675] Memory state around the buggy address: [ 31.282300] ffff888019f5a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.283215] ffff888019f5a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.284124] >ffff888019f5a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.285025] ^ [ 31.285924] ffff888019f5a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.286837] ffff888019f5a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.287744] ================================================================== [ 31.288925] Disabling lock debugging due to kernel taint [ 33.273571] BUG: Bad rss-counter state mm:000000005b4a0f10 type:MM_FILEPAGES val:33 [ 33.274766] BUG: Bad rss-counter state mm:000000005b4a0f10 type:MM_ANONPAGES val:22 [ 33.727513] BUG: Bad rss-counter state mm:000000002d1ed727 type:MM_FILEPAGES val:33 [ 33.728498] BUG: Bad rss-counter state mm:000000002d1ed727 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35507' (ECDSA) to the list of known hosts. 2023/06/20 23:12:05 fuzzer started 2023/06/20 23:12:05 dialing manager at localhost:36067 2023/06/20 23:12:05 checking machine... 2023/06/20 23:12:05 checking revisions... [ 34.365031] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:12:05 testing simple program... [ 34.419569] cgroup: Unknown subsys name 'net' [ 34.459247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:05 Registers: info registers vcpu 0 RAX=000ffffffffff000 RBX=1ffff11003731fac RCX=ffffffff817181e6 RDX=ffff888015c21b40 RSI=0000000000000000 RDI=0000000000000007 RBP=000ffffffffff000 RSP=ffff88801b98fd38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000559c3b1f1644 R13=ffffffff852c61f8 R14=ffff88800cadc0c0 R15=000000001a2af067 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f18b53fd900 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=0000559c3b1f1644 CR3=000000000e4a2000 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=00000000000000000000559c392b3060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffc79e82f68 CR3=0000000016932000 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=2035303a32313a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a32313a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000