syzkaller login: [ 40.735915] BUG: Bad rss-counter state mm:00000000b0b3107e type:MM_FILEPAGES val:33 [ 40.736937] BUG: Bad rss-counter state mm:00000000b0b3107e type:MM_ANONPAGES val:22 [ 40.904460] ================================================================== [ 40.905435] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.906449] Read of size 8 at addr ffff88801581e058 by task sshd/219 [ 40.907374] [ 40.907609] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.908527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.909589] Call Trace: [ 40.909929] [ 40.910234] dump_stack_lvl+0x91/0xf0 [ 40.910780] print_report+0xcc/0x620 [ 40.911301] ? __virt_addr_valid+0x102/0x340 [ 40.911894] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.912563] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.913224] kasan_report+0xbe/0xf0 [ 40.913751] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.914430] vma_interval_tree_remove+0xc75/0xec0 [ 40.915096] vma_prepare+0xc54/0x11a0 [ 40.915629] __split_vma+0x5af/0x950 [ 40.916156] ? __pfx___split_vma+0x10/0x10 [ 40.916742] ? find_held_lock+0x2c/0x110 [ 40.917321] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.917948] ? lock_is_held_type+0x9f/0x120 [ 40.918549] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.919257] ? mtree_range_walk+0x632/0x900 [ 40.919870] ? mas_walk+0x5c7/0x7c0 [ 40.920402] do_vmi_munmap+0x1f1/0x2b0 [ 40.920946] mmap_region+0x1f9/0x2660 [ 40.921482] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.922050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.922850] ? __pfx_lock_acquire+0x10/0x10 [ 40.923445] ? __pfx_mmap_region+0x10/0x10 [ 40.924034] ? security_mmap_addr+0x7d/0xa0 [ 40.924623] ? get_unmapped_area+0x1f5/0x3f0 [ 40.925235] do_mmap+0x854/0xf00 [ 40.925723] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.926271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.926907] ksys_mmap_pgoff+0x3af/0x500 [ 40.927473] do_syscall_64+0x3f/0x90 [ 40.928004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.928718] RIP: 0033:0x7faa97c7dd82 [ 40.929230] 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 [ 40.931612] RSP: 002b:00007ffd60825778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.932619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa97c7dd82 [ 40.933561] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa970b7000 [ 40.934505] RBP: 00007faa970b7000 R08: 0000000000000009 R09: 0000000000001000 [ 40.935465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3a559fec0 [ 40.936414] R13: 00007ffd60825790 R14: 00007ffd608257c0 R15: 00007ffd60825b20 [ 40.937375] [ 40.937703] [ 40.937935] Allocated by task 212: [ 40.938417] kasan_save_stack+0x22/0x50 [ 40.938988] kasan_set_track+0x25/0x30 [ 40.939537] __kasan_slab_alloc+0x59/0x70 [ 40.940122] kmem_cache_alloc+0x16b/0x370 [ 40.940692] vm_area_dup+0x20/0x160 [ 40.941199] __split_vma+0x170/0x950 [ 40.941719] split_vma+0xc6/0x110 [ 40.942209] mprotect_fixup+0x8d2/0xb30 [ 40.942772] do_mprotect_pkey+0x87e/0xd40 [ 40.943359] __x64_sys_mprotect+0x78/0xc0 [ 40.943937] do_syscall_64+0x3f/0x90 [ 40.944465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.945177] [ 40.945404] Freed by task 212: [ 40.945827] kasan_save_stack+0x22/0x50 [ 40.946379] kasan_set_track+0x25/0x30 [ 40.946931] kasan_save_free_info+0x2b/0x50 [ 40.947502] __kasan_slab_free+0x10a/0x190 [ 40.948081] kmem_cache_free+0x10d/0x4d0 [ 40.948626] rcu_core+0x8c8/0x2860 [ 40.949103] __do_softirq+0x1b7/0x7d4 [ 40.949618] [ 40.949847] Last potentially related work creation: [ 40.950467] kasan_save_stack+0x22/0x50 [ 40.951017] __kasan_record_aux_stack+0x8e/0xa0 [ 40.951637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.952331] remove_vma+0x139/0x170 [ 40.952813] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.953406] do_vmi_munmap+0x1f1/0x2b0 [ 40.953930] __vm_munmap+0x138/0x3a0 [ 40.954436] __x64_sys_munmap+0x59/0x80 [ 40.954991] do_syscall_64+0x3f/0x90 [ 40.955507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.956196] [ 40.956430] Second to last potentially related work creation: [ 40.957172] kasan_save_stack+0x22/0x50 [ 40.957716] __kasan_record_aux_stack+0x8e/0xa0 [ 40.958330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.959019] remove_vma+0x139/0x170 [ 40.959503] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.960114] do_vmi_munmap+0x1f1/0x2b0 [ 40.960645] mmap_region+0x1f9/0x2660 [ 40.961164] do_mmap+0x854/0xf00 [ 40.961626] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.962152] ksys_mmap_pgoff+0x3af/0x500 [ 40.962696] do_syscall_64+0x3f/0x90 [ 40.963222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.963911] [ 40.964142] The buggy address belongs to the object at ffff88801581e000 [ 40.964142] which belongs to the cache vm_area_struct of size 168 [ 40.965713] The buggy address is located 88 bytes inside of [ 40.965713] freed 168-byte region [ffff88801581e000, ffff88801581e0a8) [ 40.967236] [ 40.967469] The buggy address belongs to the physical page: [ 40.968173] page:00000000276e8ce0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1581e [ 40.969338] memcg:ffff88800d909801 [ 40.969795] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.970485] page_type: 0xffffffff() [ 40.970981] raw: 0100000000000200 ffff88800879fc80 ffffea00003be080 dead000000000004 [ 40.971972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d909801 [ 40.972949] page dumped because: kasan: bad access detected [ 40.973668] [ 40.973903] Memory state around the buggy address: [ 40.974535] ffff88801581df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.975469] ffff88801581df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.976399] >ffff88801581e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.977320] ^ [ 40.978099] ffff88801581e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.979023] ffff88801581e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.979940] ================================================================== [ 40.981029] Disabling lock debugging due to kernel taint [ 44.048055] BUG: Bad rss-counter state mm:0000000086472b42 type:MM_FILEPAGES val:33 [ 44.049626] BUG: Bad rss-counter state mm:0000000086472b42 type:MM_ANONPAGES val:22 [ 44.559265] BUG: Bad rss-counter state mm:0000000088f69223 type:MM_FILEPAGES val:33 [ 44.560501] BUG: Bad rss-counter state mm:0000000088f69223 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38336' (ECDSA) to the list of known hosts. 2023/06/19 12:26:35 fuzzer started 2023/06/19 12:26:35 dialing manager at localhost:44161 2023/06/19 12:26:35 checking machine... 2023/06/19 12:26:35 checking revisions... [ 45.261486] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:26:35 testing simple program... [ 45.309837] cgroup: Unknown subsys name 'net' [ 45.362519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:26:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652a88 RCX=0000000000000000 RDX=ffff888015a30000 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015b97390 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=000000000000001e RIP=ffffffff8450bdc0 RFL=00000293 [--S-A-C] 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 00007fe6d1805700 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=00007ff534635710 CR3=0000000019be6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035333a3632 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffd3e6be000 CR3=000000000dda4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000