syzkaller login: [ 31.146502] BUG: Bad rss-counter state mm:0000000029e54d82 type:MM_FILEPAGES val:33 [ 31.147873] BUG: Bad rss-counter state mm:0000000029e54d82 type:MM_ANONPAGES val:22 [ 31.299081] ================================================================== [ 31.300091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.301084] Read of size 8 at addr ffff88800fe5f310 by task sshd/220 [ 31.302066] [ 31.302298] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.303218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.304237] Call Trace: [ 31.304574] [ 31.304871] dump_stack_lvl+0x91/0xf0 [ 31.305383] print_report+0xcc/0x620 [ 31.305892] ? __virt_addr_valid+0x102/0x340 [ 31.306486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307836] kasan_report+0xbe/0xf0 [ 31.308348] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.309013] vma_interval_tree_remove+0xc75/0xec0 [ 31.309649] vma_prepare+0xc54/0x11a0 [ 31.310160] __split_vma+0x5af/0x950 [ 31.310666] ? __pfx___split_vma+0x10/0x10 [ 31.311256] ? find_held_lock+0x2c/0x110 [ 31.311805] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.312399] ? lock_is_held_type+0x9f/0x120 [ 31.312976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.313628] ? mtree_range_walk+0x632/0x900 [ 31.314214] ? mas_walk+0x5c7/0x7c0 [ 31.314708] do_vmi_munmap+0x1f1/0x2b0 [ 31.315247] mmap_region+0x1f9/0x2660 [ 31.315757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.316296] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.317058] ? __pfx_lock_acquire+0x10/0x10 [ 31.317624] ? __pfx_mmap_region+0x10/0x10 [ 31.318184] ? security_mmap_addr+0x7d/0xa0 [ 31.318739] ? get_unmapped_area+0x1f5/0x3f0 [ 31.319324] do_mmap+0x854/0xf00 [ 31.319787] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.320304] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.320895] ksys_mmap_pgoff+0x3af/0x500 [ 31.321430] do_syscall_64+0x3f/0x90 [ 31.321938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322621] RIP: 0033:0x7fdfef9c8d82 [ 31.323119] 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 [ 31.325371] RSP: 002b:00007fff33d37898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.326335] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfef9c8d82 [ 31.327237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfeee02000 [ 31.328127] RBP: 00007fdfeee02000 R08: 0000000000000009 R09: 0000000000001000 [ 31.329016] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631169d8ec0 [ 31.329911] R13: 00007fff33d378b0 R14: 00007fff33d378e0 R15: 00007fff33d37c40 [ 31.330802] [ 31.331129] [ 31.331355] Allocated by task 213: [ 31.331805] kasan_save_stack+0x22/0x50 [ 31.332338] kasan_set_track+0x25/0x30 [ 31.332859] __kasan_slab_alloc+0x59/0x70 [ 31.333407] kmem_cache_alloc+0x16b/0x370 [ 31.333947] vm_area_dup+0x20/0x160 [ 31.334422] __split_vma+0x170/0x950 [ 31.334911] split_vma+0xc6/0x110 [ 31.335472] mprotect_fixup+0x8d2/0xb30 [ 31.336006] do_mprotect_pkey+0x87e/0xd40 [ 31.336543] __x64_sys_mprotect+0x78/0xc0 [ 31.337076] do_syscall_64+0x3f/0x90 [ 31.337555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338213] [ 31.338431] Freed by task 213: [ 31.338821] kasan_save_stack+0x22/0x50 [ 31.339376] kasan_set_track+0x25/0x30 [ 31.339974] kasan_save_free_info+0x2b/0x50 [ 31.340629] __kasan_slab_free+0x10a/0x190 [ 31.341279] kmem_cache_free+0x10d/0x4d0 [ 31.341895] rcu_core+0x8c8/0x2860 [ 31.342508] __do_softirq+0x1b7/0x7d4 [ 31.343110] [ 31.343373] Last potentially related work creation: [ 31.344079] kasan_save_stack+0x22/0x50 [ 31.344685] __kasan_record_aux_stack+0x8e/0xa0 [ 31.345390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.346173] remove_vma+0x139/0x170 [ 31.346725] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.347402] do_vmi_munmap+0x1f1/0x2b0 [ 31.348003] __vm_munmap+0x138/0x3a0 [ 31.348575] __x64_sys_munmap+0x59/0x80 [ 31.349176] do_syscall_64+0x3f/0x90 [ 31.349755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350530] [ 31.350792] The buggy address belongs to the object at ffff88800fe5f2b8 [ 31.350792] which belongs to the cache vm_area_struct of size 168 [ 31.352402] The buggy address is located 88 bytes inside of [ 31.352402] freed 168-byte region [ffff88800fe5f2b8, ffff88800fe5f360) [ 31.353831] [ 31.354049] The buggy address belongs to the physical page: [ 31.354701] page:00000000f8d2ecd2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe5f [ 31.355801] memcg:ffff888012ffaa01 [ 31.356230] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.356935] page_type: 0xffffffff() [ 31.357396] raw: 0100000000000200 ffff8880087a0c80 ffffea000031e080 dead000000000003 [ 31.358322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888012ffaa01 [ 31.359233] page dumped because: kasan: bad access detected [ 31.359912] [ 31.360132] Memory state around the buggy address: [ 31.360719] ffff88800fe5f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.361593] ffff88800fe5f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.362460] >ffff88800fe5f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.363333] ^ [ 31.363816] ffff88800fe5f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.364694] ffff88800fe5f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.365549] ================================================================== [ 31.366483] Disabling lock debugging due to kernel taint [ 33.362046] BUG: Bad rss-counter state mm:0000000048ce416d type:MM_FILEPAGES val:33 [ 33.363236] BUG: Bad rss-counter state mm:0000000048ce416d type:MM_ANONPAGES val:22 [ 33.749852] BUG: Bad rss-counter state mm:0000000048b2c7d2 type:MM_FILEPAGES val:33 [ 33.751183] BUG: Bad rss-counter state mm:0000000048b2c7d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41037' (ECDSA) to the list of known hosts. 2023/06/20 23:00:07 fuzzer started 2023/06/20 23:00:08 dialing manager at localhost:36067 2023/06/20 23:00:08 checking machine... 2023/06/20 23:00:08 checking revisions... [ 34.484030] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:00:08 testing simple program... [ 34.522734] cgroup: Unknown subsys name 'net' [ 34.564057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:00:07 Registers: info registers vcpu 0 RAX=ffffffff818e31f7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001defefd RSI=ffffffff818e31f7 RDI=ffff88800ef7f858 RBP=ffff88800ef7f828 RSP=ffff88800ef7f788 R8 =0000000000000001 R9 =ffff88800ef7f7d0 R10=0000000000038001 R11=00000000000246c8 R12=ffff88800ef7f858 R13=0000000000000000 R14=ffff888015d89b40 R15=ffff888019d64e58 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007fa58bc91900 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=000055a90a29a768 CR3=000000001a102000 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=ff0000000000ffff0000000000ff0000 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=0000000080000000 RBX=0000000000000000 RCX=ffffffff810ac514 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fced1c0 RSP=ffff888014737ee0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888014737f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0250 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 00007fe7da850900 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=00007fe7d9c983a0 CR3=000000000c400000 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=15cd7bbc05bf1ab9fb4847cf8a96564c XMM02=eff9b2d0a8fce9cb000000000011d758 XMM03=2c67c8bc2e329bc3000000000011d880 XMM04=6136a1f4960242c700000000000ae988 XMM05=03232c930270c1260000000000133028 XMM06=1a72d75c66c49cc80000000000131dc8 XMM07=fb795ef6d65770560000000000122020 XMM08=2c67c8bc2e329bc3000000000011d880 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000