syzkaller login: [ 30.154850] BUG: Bad rss-counter state mm:000000004ed4e88c type:MM_FILEPAGES val:33 [ 30.156061] BUG: Bad rss-counter state mm:000000004ed4e88c type:MM_ANONPAGES val:22 [ 30.194913] ================================================================== [ 30.195993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.197208] Read of size 8 at addr ffff8880169a8968 by task sshd/220 [ 30.197997] [ 30.198221] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.199115] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.200123] Call Trace: [ 30.200451] <TASK> [ 30.200752] dump_stack_lvl+0x91/0xf0 [ 30.201250] print_report+0xcc/0x620 [ 30.201749] ? __virt_addr_valid+0x102/0x340 [ 30.202310] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.202952] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.203579] kasan_report+0xbe/0xf0 [ 30.204093] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.204739] vma_interval_tree_remove+0xc75/0xec0 [ 30.205351] vma_prepare+0xc54/0x11a0 [ 30.205876] __split_vma+0x5af/0x950 [ 30.206373] ? __pfx___split_vma+0x10/0x10 [ 30.206923] ? find_held_lock+0x2c/0x110 [ 30.207464] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.208063] ? lock_is_held_type+0x9f/0x120 [ 30.208615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.209257] ? mtree_range_walk+0x632/0x900 [ 30.209829] ? mas_walk+0x5c7/0x7c0 [ 30.210314] do_vmi_munmap+0x1f1/0x2b0 [ 30.210817] mmap_region+0x1f9/0x2660 [ 30.211306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.211847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.212577] ? __pfx_lock_acquire+0x10/0x10 [ 30.213141] ? __pfx_mmap_region+0x10/0x10 [ 30.213676] ? security_mmap_addr+0x7d/0xa0 [ 30.214250] ? get_unmapped_area+0x1f5/0x3f0 [ 30.214825] do_mmap+0x854/0xf00 [ 30.215394] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.216091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.216832] ksys_mmap_pgoff+0x3af/0x500 [ 30.217492] do_syscall_64+0x3f/0x90 [ 30.218097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.218929] RIP: 0033:0x7fb565ba7d82 [ 30.219510] 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 [ 30.222240] RSP: 002b:00007ffeae544d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.223175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb565ba7d82 [ 30.224058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb564fe1000 [ 30.224950] RBP: 00007fb564fe1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.225832] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b2af9df70 [ 30.226697] R13: 00007ffeae544d40 R14: 00007ffeae544d70 R15: 00007ffeae5450d0 [ 30.227584] </TASK> [ 30.227904] [ 30.228127] Allocated by task 213: [ 30.228565] kasan_save_stack+0x22/0x50 [ 30.229101] kasan_set_track+0x25/0x30 [ 30.229604] __kasan_slab_alloc+0x59/0x70 [ 30.230160] kmem_cache_alloc+0x16b/0x370 [ 30.230697] vm_area_dup+0x20/0x160 [ 30.231168] __split_vma+0x170/0x950 [ 30.231651] split_vma+0xc6/0x110 [ 30.232132] mprotect_fixup+0x8d2/0xb30 [ 30.232648] do_mprotect_pkey+0x87e/0xd40 [ 30.233189] __x64_sys_mprotect+0x78/0xc0 [ 30.233733] do_syscall_64+0x3f/0x90 [ 30.234223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.234913] [ 30.235133] Freed by task 213: [ 30.235534] kasan_save_stack+0x22/0x50 [ 30.236097] kasan_set_track+0x25/0x30 [ 30.236598] kasan_save_free_info+0x2b/0x50 [ 30.237156] __kasan_slab_free+0x10a/0x190 [ 30.237701] kmem_cache_free+0x10d/0x4d0 [ 30.238236] rcu_core+0x8c8/0x2860 [ 30.238769] __do_softirq+0x1b7/0x7d4 [ 30.239253] [ 30.239471] Last potentially related work creation: [ 30.240086] kasan_save_stack+0x22/0x50 [ 30.240591] __kasan_record_aux_stack+0x8e/0xa0 [ 30.241190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.241881] remove_vma+0x139/0x170 [ 30.242344] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.242983] do_vmi_munmap+0x1f1/0x2b0 [ 30.243631] __vm_munmap+0x138/0x3a0 [ 30.244175] __x64_sys_munmap+0x59/0x80 [ 30.244679] do_syscall_64+0x3f/0x90 [ 30.245183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.245851] [ 30.246067] The buggy address belongs to the object at ffff8880169a8910 [ 30.246067] which belongs to the cache vm_area_struct of size 168 [ 30.247567] The buggy address is located 88 bytes inside of [ 30.247567] freed 168-byte region [ffff8880169a8910, ffff8880169a89b8) [ 30.249025] [ 30.249246] The buggy address belongs to the physical page: [ 30.249928] page:000000006088dd9d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169a8 [ 30.251085] memcg:ffff88800f1a2b01 [ 30.251515] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.252210] page_type: 0xffffffff() [ 30.252667] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.253612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1a2b01 [ 30.254547] page dumped because: kasan: bad access detected [ 30.255248] [ 30.255468] Memory state around the buggy address: [ 30.256198] ffff8880169a8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.257120] ffff8880169a8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.258036] >ffff8880169a8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.258937] ^ [ 30.259731] ffff8880169a8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.260611] ffff8880169a8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.261490] ================================================================== [ 30.262553] Disabling lock debugging due to kernel taint [ 32.737652] BUG: Bad rss-counter state mm:00000000fa26ddbb type:MM_FILEPAGES val:33 [ 32.738345] BUG: Bad rss-counter state mm:00000000fa26ddbb type:MM_ANONPAGES val:22 [ 33.146597] BUG: Bad rss-counter state mm:0000000054fe1d70 type:MM_FILEPAGES val:33 [ 33.147361] BUG: Bad rss-counter state mm:0000000054fe1d70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60709' (ECDSA) to the list of known hosts. 2023/06/20 12:30:19 fuzzer started 2023/06/20 12:30:19 dialing manager at localhost:36067 2023/06/20 12:30:19 checking machine... 2023/06/20 12:30:19 checking revisions... [ 33.900719] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:30:20 testing simple program... [ 33.948051] cgroup: Unknown subsys name 'net' [ 34.006804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:30:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea00003b1a00 RCX=0000000000000000 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88800f1076d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea0000729500 R14=ffffffff83675648 R15=ffff88800e318600 RIP=ffffffff8180c61b RFL=00000286 [--S--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 00007f3d4d6f7900 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=00007fffd702a000 CR3=0000000018096000 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=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 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=ffff888008c04400 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=00007f1fb2854620 CR3=000000000e2f0000 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=2039313a30333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000