syzkaller login: [ 31.151076] sshd (212) used greatest stack depth: 24128 bytes left [ 31.153009] BUG: Bad rss-counter state mm:0000000080a77604 type:MM_FILEPAGES val:33 [ 31.154364] BUG: Bad rss-counter state mm:0000000080a77604 type:MM_ANONPAGES val:22 [ 31.313568] ================================================================== [ 31.314471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.315414] Read of size 8 at addr ffff88800e70a3f8 by task sshd/219 [ 31.316190] [ 31.316519] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.317390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.318370] Call Trace: [ 31.318693] [ 31.318982] dump_stack_lvl+0x91/0xf0 [ 31.319481] print_report+0xcc/0x620 [ 31.319998] ? __virt_addr_valid+0x102/0x340 [ 31.320560] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321205] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321830] kasan_report+0xbe/0xf0 [ 31.322312] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.322956] vma_interval_tree_remove+0xc75/0xec0 [ 31.323586] vma_prepare+0xc54/0x11a0 [ 31.324101] __split_vma+0x5af/0x950 [ 31.324584] ? __pfx___split_vma+0x10/0x10 [ 31.325130] ? find_held_lock+0x2c/0x110 [ 31.325662] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.326248] ? lock_is_held_type+0x9f/0x120 [ 31.326805] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.327434] ? mtree_range_walk+0x632/0x900 [ 31.328027] ? mas_walk+0x5c7/0x7c0 [ 31.328518] do_vmi_munmap+0x1f1/0x2b0 [ 31.329028] mmap_region+0x1f9/0x2660 [ 31.329523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.330049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.330784] ? __pfx_lock_acquire+0x10/0x10 [ 31.331345] ? __pfx_mmap_region+0x10/0x10 [ 31.331918] ? security_mmap_addr+0x7d/0xa0 [ 31.332466] ? get_unmapped_area+0x1f5/0x3f0 [ 31.333037] do_mmap+0x854/0xf00 [ 31.333497] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.334010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.334589] ksys_mmap_pgoff+0x3af/0x500 [ 31.335112] do_syscall_64+0x3f/0x90 [ 31.335606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336296] RIP: 0033:0x7f8de59efd82 [ 31.336766] 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 [ 31.338981] RSP: 002b:00007ffda1dedcb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.339943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8de59efd82 [ 31.340817] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8de4e29000 [ 31.341700] RBP: 00007f8de4e29000 R08: 0000000000000009 R09: 0000000000001000 [ 31.342576] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e4b727ec0 [ 31.343451] R13: 00007ffda1dedcd0 R14: 00007ffda1dedd00 R15: 00007ffda1dee060 [ 31.344355] [ 31.344656] [ 31.344875] Allocated by task 212: [ 31.345319] kasan_save_stack+0x22/0x50 [ 31.345839] kasan_set_track+0x25/0x30 [ 31.346350] __kasan_slab_alloc+0x59/0x70 [ 31.346895] kmem_cache_alloc+0x16b/0x370 [ 31.347427] vm_area_dup+0x20/0x160 [ 31.347907] __split_vma+0x170/0x950 [ 31.348388] split_vma+0xc6/0x110 [ 31.348839] mprotect_fixup+0x8d2/0xb30 [ 31.349355] do_mprotect_pkey+0x87e/0xd40 [ 31.349894] __x64_sys_mprotect+0x78/0xc0 [ 31.350432] do_syscall_64+0x3f/0x90 [ 31.350919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351587] [ 31.351825] Freed by task 210: [ 31.352229] kasan_save_stack+0x22/0x50 [ 31.352749] kasan_set_track+0x25/0x30 [ 31.353257] kasan_save_free_info+0x2b/0x50 [ 31.353807] __kasan_slab_free+0x10a/0x190 [ 31.354355] kmem_cache_free+0x10d/0x4d0 [ 31.354878] rcu_core+0x8c8/0x2860 [ 31.355337] __do_softirq+0x1b7/0x7d4 [ 31.355842] [ 31.356071] Last potentially related work creation: [ 31.356675] kasan_save_stack+0x22/0x50 [ 31.357193] __kasan_record_aux_stack+0x8e/0xa0 [ 31.357783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.358444] remove_vma+0x139/0x170 [ 31.358908] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.359482] do_vmi_munmap+0x1f1/0x2b0 [ 31.360008] __vm_munmap+0x138/0x3a0 [ 31.360491] __x64_sys_munmap+0x59/0x80 [ 31.361008] do_syscall_64+0x3f/0x90 [ 31.361494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362159] [ 31.362385] The buggy address belongs to the object at ffff88800e70a3a0 [ 31.362385] which belongs to the cache vm_area_struct of size 168 [ 31.363919] The buggy address is located 88 bytes inside of [ 31.363919] freed 168-byte region [ffff88800e70a3a0, ffff88800e70a448) [ 31.365377] [ 31.365598] The buggy address belongs to the physical page: [ 31.366275] page:000000009756d86f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe70a [ 31.367395] memcg:ffff88800da63c01 [ 31.367849] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.368519] page_type: 0xffffffff() [ 31.368984] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356580 dead000000000006 [ 31.369938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da63c01 [ 31.370873] page dumped because: kasan: bad access detected [ 31.371560] [ 31.371797] Memory state around the buggy address: [ 31.372404] ffff88800e70a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.373293] ffff88800e70a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.374179] >ffff88800e70a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.375067] ^ [ 31.375947] ffff88800e70a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.376838] ffff88800e70a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.377717] ================================================================== [ 31.378713] Disabling lock debugging due to kernel taint [ 33.445202] BUG: Bad rss-counter state mm:000000009d315a1c type:MM_FILEPAGES val:33 [ 33.446263] BUG: Bad rss-counter state mm:000000009d315a1c type:MM_ANONPAGES val:22 [ 33.898995] BUG: Bad rss-counter state mm:0000000040af507e type:MM_FILEPAGES val:33 [ 33.900244] BUG: Bad rss-counter state mm:0000000040af507e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53351' (ECDSA) to the list of known hosts. 2023/06/21 04:29:05 fuzzer started 2023/06/21 04:29:05 dialing manager at localhost:36067 2023/06/21 04:29:06 checking machine... 2023/06/21 04:29:06 checking revisions... [ 34.613760] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:29:06 testing simple program... [ 34.659071] cgroup: Unknown subsys name 'net' [ 34.699857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:29:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800911e000 RCX=ffffffff81834cfb RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888013fe83f4 RBP=ffff888013fe8000 RSP=ffff888013fe79f0 R8 =0000000000000000 R9 =fffff940000c40e0 R10=ffffea0000620707 R11=00000000000b6d53 R12=ffffea0000620700 R13=ffff888008aa6b00 R14=0000000000000001 R15=ffff8880165ab828 RIP=ffffffff813744e1 RFL=00000217 [----APC] 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 00007f610668d900 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=00007f6105ac3ea0 CR3=000000000c5f2000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1ae717cac13f3c7700000000000ae988 XMM05=20a821b2dd16fedd00000000001321b0 XMM06=080283db222d3c5f0000000000130ee8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f2157061dad RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f2157061dad RSP=ffff888019e97298 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f2157061000 R11=00000000000b6a61 R12=ffff888019e973b0 R13=0000000000000000 R14=ffff88800e5e51c0 R15=0000000000092820 RIP=ffffffff8135b935 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 00007f2156a1f700 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=00007ffc3a0a8a38 CR3=000000000ca98000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035303a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323035 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000