syzkaller login: [ 31.498178] BUG: Bad rss-counter state mm:00000000a9c8b857 type:MM_FILEPAGES val:33 [ 31.499411] BUG: Bad rss-counter state mm:00000000a9c8b857 type:MM_ANONPAGES val:22 [ 31.547082] ================================================================== [ 31.548194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.549365] Read of size 8 at addr ffff888015cce880 by task sshd/220 [ 31.550351] [ 31.550638] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.551742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.552980] Call Trace: [ 31.553386] [ 31.553745] dump_stack_lvl+0x91/0xf0 [ 31.554474] print_report+0xcc/0x620 [ 31.555087] ? __virt_addr_valid+0x102/0x340 [ 31.555788] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556589] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.557450] kasan_report+0xbe/0xf0 [ 31.558112] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.558997] vma_interval_tree_remove+0xc75/0xec0 [ 31.559843] vma_prepare+0xc54/0x11a0 [ 31.560517] __split_vma+0x5af/0x950 [ 31.561168] ? __pfx___split_vma+0x10/0x10 [ 31.561903] ? find_held_lock+0x2c/0x110 [ 31.562600] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.563358] ? lock_is_held_type+0x9f/0x120 [ 31.564052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.564841] ? mtree_range_walk+0x632/0x900 [ 31.565550] ? mas_walk+0x5c7/0x7c0 [ 31.566170] do_vmi_munmap+0x1f1/0x2b0 [ 31.566811] mmap_region+0x1f9/0x2660 [ 31.567414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.568052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.568939] ? __pfx_lock_acquire+0x10/0x10 [ 31.569603] ? __pfx_mmap_region+0x10/0x10 [ 31.570267] ? security_mmap_addr+0x7d/0xa0 [ 31.570974] ? get_unmapped_area+0x1f5/0x3f0 [ 31.571694] do_mmap+0x854/0xf00 [ 31.572270] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.572922] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.573654] ksys_mmap_pgoff+0x3af/0x500 [ 31.574379] do_syscall_64+0x3f/0x90 [ 31.574992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.575797] RIP: 0033:0x7f0ee9efbd82 [ 31.576378] 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 [ 31.579102] RSP: 002b:00007ffe8ae38978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.580246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ee9efbd82 [ 31.581319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ee9335000 [ 31.582386] RBP: 00007f0ee9335000 R08: 0000000000000009 R09: 0000000000001000 [ 31.583444] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4df282f70 [ 31.584507] R13: 00007ffe8ae38990 R14: 00007ffe8ae389c0 R15: 00007ffe8ae38d20 [ 31.585580] [ 31.585943] [ 31.586210] Allocated by task 213: [ 31.586761] kasan_save_stack+0x22/0x50 [ 31.587378] kasan_set_track+0x25/0x30 [ 31.587989] __kasan_slab_alloc+0x59/0x70 [ 31.588647] kmem_cache_alloc+0x16b/0x370 [ 31.589294] vm_area_dup+0x20/0x160 [ 31.589872] __split_vma+0x170/0x950 [ 31.590487] split_vma+0xc6/0x110 [ 31.590982] mprotect_fixup+0x8d2/0xb30 [ 31.591488] do_mprotect_pkey+0x87e/0xd40 [ 31.592016] __x64_sys_mprotect+0x78/0xc0 [ 31.592538] do_syscall_64+0x3f/0x90 [ 31.593016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.593660] [ 31.593876] Freed by task 213: [ 31.594272] kasan_save_stack+0x22/0x50 [ 31.594808] kasan_set_track+0x25/0x30 [ 31.595302] kasan_save_free_info+0x2b/0x50 [ 31.595833] __kasan_slab_free+0x10a/0x190 [ 31.596361] kmem_cache_free+0x10d/0x4d0 [ 31.596868] rcu_core+0x8c8/0x2860 [ 31.597325] __do_softirq+0x1b7/0x7d4 [ 31.597805] [ 31.598022] Last potentially related work creation: [ 31.598650] kasan_save_stack+0x22/0x50 [ 31.599148] __kasan_record_aux_stack+0x8e/0xa0 [ 31.599721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.600375] remove_vma+0x139/0x170 [ 31.600828] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.601390] do_vmi_munmap+0x1f1/0x2b0 [ 31.601886] __vm_munmap+0x138/0x3a0 [ 31.602367] __x64_sys_munmap+0x59/0x80 [ 31.602868] do_syscall_64+0x3f/0x90 [ 31.603346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604004] [ 31.604221] The buggy address belongs to the object at ffff888015cce828 [ 31.604221] which belongs to the cache vm_area_struct of size 168 [ 31.605689] The buggy address is located 88 bytes inside of [ 31.605689] freed 168-byte region [ffff888015cce828, ffff888015cce8d0) [ 31.607099] [ 31.607316] The buggy address belongs to the physical page: [ 31.607976] page:00000000357d0985 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15cce [ 31.609070] memcg:ffff88800fe05601 [ 31.609504] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.610160] page_type: 0xffffffff() [ 31.610638] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.611566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe05601 [ 31.612467] page dumped because: kasan: bad access detected [ 31.613125] [ 31.613346] Memory state around the buggy address: [ 31.613931] ffff888015cce780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.614803] ffff888015cce800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.615673] >ffff888015cce880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.616537] ^ [ 31.616947] ffff888015cce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.617817] ffff888015cce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.618692] ================================================================== [ 31.619710] Disabling lock debugging due to kernel taint [ 33.552283] BUG: Bad rss-counter state mm:000000009d67cc05 type:MM_FILEPAGES val:33 [ 33.554107] BUG: Bad rss-counter state mm:000000009d67cc05 type:MM_ANONPAGES val:22 [ 34.002395] BUG: Bad rss-counter state mm:00000000f5116647 type:MM_FILEPAGES val:33 [ 34.003338] BUG: Bad rss-counter state mm:00000000f5116647 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24552' (ECDSA) to the list of known hosts. 2023/06/21 09:41:27 fuzzer started 2023/06/21 09:41:27 dialing manager at localhost:36067 2023/06/21 09:41:27 checking machine... 2023/06/21 09:41:27 checking revisions... [ 34.747391] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:41:27 testing simple program... [ 34.808021] cgroup: Unknown subsys name 'net' [ 34.853670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010b40a7a RCX=ffffffff81f3493d RDX=ffff888016890000 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000002 RSP=ffff8880164e7968 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000700 R13=ffff888010b40a78 R14=dffffc0000000000 R15=0000000000000002 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f83b81f4900 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=00007f83b87ab618 CR3=000000001672a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007ffd2a6f5e38 CR3=000000000f15e000 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=2036323a31343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000