syzkaller login: [ 40.411112] BUG: Bad rss-counter state mm:00000000b41a9787 type:MM_FILEPAGES val:33 [ 40.412343] BUG: Bad rss-counter state mm:00000000b41a9787 type:MM_ANONPAGES val:22 [ 40.582102] ================================================================== [ 40.583018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.583974] Read of size 8 at addr ffff888019305140 by task sshd/220 [ 40.584767] [ 40.584987] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.585960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.586952] Call Trace: [ 40.587271] [ 40.587574] dump_stack_lvl+0x91/0xf0 [ 40.588077] print_report+0xcc/0x620 [ 40.588569] ? __virt_addr_valid+0x102/0x340 [ 40.589150] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.589772] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.590416] kasan_report+0xbe/0xf0 [ 40.590907] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.591533] vma_interval_tree_remove+0xc75/0xec0 [ 40.592139] vma_prepare+0xc54/0x11a0 [ 40.592617] __split_vma+0x5af/0x950 [ 40.593100] ? __pfx___split_vma+0x10/0x10 [ 40.593625] ? find_held_lock+0x2c/0x110 [ 40.594151] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.594717] ? lock_is_held_type+0x9f/0x120 [ 40.595261] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.595881] ? mtree_range_walk+0x632/0x900 [ 40.596435] ? mas_walk+0x5c7/0x7c0 [ 40.596938] do_vmi_munmap+0x1f1/0x2b0 [ 40.597434] mmap_region+0x1f9/0x2660 [ 40.597925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.598443] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.599168] ? __pfx_lock_acquire+0x10/0x10 [ 40.599705] ? __pfx_mmap_region+0x10/0x10 [ 40.600249] ? security_mmap_addr+0x7d/0xa0 [ 40.600788] ? get_unmapped_area+0x1f5/0x3f0 [ 40.601349] do_mmap+0x854/0xf00 [ 40.601789] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.602284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.602846] ksys_mmap_pgoff+0x3af/0x500 [ 40.603368] do_syscall_64+0x3f/0x90 [ 40.603860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.604514] RIP: 0033:0x7f77f7737d82 [ 40.604990] 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 [ 40.607109] RSP: 002b:00007ffda5816838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.608024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77f7737d82 [ 40.608892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77f6b71000 [ 40.609744] RBP: 00007f77f6b71000 R08: 0000000000000009 R09: 0000000000001000 [ 40.610584] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1cedd0ec0 [ 40.611430] R13: 00007ffda5816850 R14: 00007ffda5816880 R15: 00007ffda5816be0 [ 40.612290] [ 40.612584] [ 40.612806] Allocated by task 213: [ 40.613233] kasan_save_stack+0x22/0x50 [ 40.613741] kasan_set_track+0x25/0x30 [ 40.614238] __kasan_slab_alloc+0x59/0x70 [ 40.614767] kmem_cache_alloc+0x16b/0x370 [ 40.615283] vm_area_dup+0x20/0x160 [ 40.615753] __split_vma+0x170/0x950 [ 40.616216] split_vma+0xc6/0x110 [ 40.616671] mprotect_fixup+0x8d2/0xb30 [ 40.617200] do_mprotect_pkey+0x87e/0xd40 [ 40.617737] __x64_sys_mprotect+0x78/0xc0 [ 40.618266] do_syscall_64+0x3f/0x90 [ 40.618744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.619389] [ 40.619601] Freed by task 209: [ 40.620001] kasan_save_stack+0x22/0x50 [ 40.620520] kasan_set_track+0x25/0x30 [ 40.621032] kasan_save_free_info+0x2b/0x50 [ 40.621572] __kasan_slab_free+0x10a/0x190 [ 40.622109] kmem_cache_free+0x10d/0x4d0 [ 40.622621] rcu_core+0x8c8/0x2860 [ 40.623078] __do_softirq+0x1b7/0x7d4 [ 40.623559] [ 40.623771] Last potentially related work creation: [ 40.624368] kasan_save_stack+0x22/0x50 [ 40.624890] __kasan_record_aux_stack+0x8e/0xa0 [ 40.625463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.626108] remove_vma+0x139/0x170 [ 40.626559] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.627115] do_vmi_munmap+0x1f1/0x2b0 [ 40.627599] __vm_munmap+0x138/0x3a0 [ 40.628069] __x64_sys_munmap+0x59/0x80 [ 40.628569] do_syscall_64+0x3f/0x90 [ 40.629058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.629699] [ 40.629913] The buggy address belongs to the object at ffff8880193050e8 [ 40.629913] which belongs to the cache vm_area_struct of size 168 [ 40.631370] The buggy address is located 88 bytes inside of [ 40.631370] freed 168-byte region [ffff8880193050e8, ffff888019305190) [ 40.632809] [ 40.633026] The buggy address belongs to the physical page: [ 40.633696] page:0000000010755a7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19305 [ 40.634803] memcg:ffff88800d2aaf01 [ 40.635249] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.635904] page_type: 0xffffffff() [ 40.636367] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.637328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2aaf01 [ 40.638266] page dumped because: kasan: bad access detected [ 40.638961] [ 40.639183] Memory state around the buggy address: [ 40.639780] ffff888019305000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.640665] ffff888019305080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.641538] >ffff888019305100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.642389] ^ [ 40.643025] ffff888019305180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.643876] ffff888019305200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.644724] ================================================================== [ 40.645799] Disabling lock debugging due to kernel taint [ 43.564499] BUG: Bad rss-counter state mm:000000000e961b7e type:MM_FILEPAGES val:33 [ 43.565502] BUG: Bad rss-counter state mm:000000000e961b7e type:MM_ANONPAGES val:22 [ 44.040168] BUG: Bad rss-counter state mm:00000000a814f192 type:MM_FILEPAGES val:33 [ 44.041178] BUG: Bad rss-counter state mm:00000000a814f192 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49496' (ECDSA) to the list of known hosts. 2023/06/19 21:47:31 fuzzer started 2023/06/19 21:47:31 dialing manager at localhost:44161 2023/06/19 21:47:31 checking machine... 2023/06/19 21:47:31 checking revisions... [ 44.779783] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:47:31 testing simple program... [ 44.821656] cgroup: Unknown subsys name 'net' [ 44.859117] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:47:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff821690fa RDX=ffff8880146651c0 RSI=0000000000000000 RDI=0000000000000005 RBP=00007ffc5bec2970 RSP=ffff8880147e7a98 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=ffff8880147e7c58 R15=ffff8880147e7e70 RIP=ffffffff814c01fc 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 00007fdb0c572900 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=00007ff31eee2650 CR3=00000000145ec000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9fa5829d279899fa00000000000ae988 XMM05=e856093e1af2afd40000000000134d98 XMM06=c291bd5c70af25b90000000000133b88 XMM07=fb795ef6d65770560000000000123978 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007ffc5c79fb08 CR3=0000000005482000 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=00007fcb7d848510000055b677077790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000