syzkaller login: [ 35.714421] BUG: Bad rss-counter state mm:00000000dd5ee9c0 type:MM_FILEPAGES val:33 [ 35.715399] BUG: Bad rss-counter state mm:00000000dd5ee9c0 type:MM_ANONPAGES val:22 [ 35.886647] ================================================================== [ 35.887735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.889044] Read of size 8 at addr ffff88800e4f4df0 by task sshd/220 [ 35.889973] [ 35.890234] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.891264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.891936] Call Trace: [ 35.892113] [ 35.892271] dump_stack_lvl+0x91/0xf0 [ 35.892543] print_report+0xcc/0x620 [ 35.892808] ? __virt_addr_valid+0x102/0x340 [ 35.893120] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.893457] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.893800] kasan_report+0xbe/0xf0 [ 35.894061] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.894405] vma_interval_tree_remove+0xc75/0xec0 [ 35.894736] vma_prepare+0xc54/0x11a0 [ 35.895002] __split_vma+0x5af/0x950 [ 35.895263] ? __pfx___split_vma+0x10/0x10 [ 35.895555] ? find_held_lock+0x2c/0x110 [ 35.895840] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.896148] ? lock_is_held_type+0x9f/0x120 [ 35.896446] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.896798] ? mtree_range_walk+0x632/0x900 [ 35.897115] ? mas_walk+0x5c7/0x7c0 [ 35.897383] do_vmi_munmap+0x1f1/0x2b0 [ 35.897651] mmap_region+0x1f9/0x2660 [ 35.897923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.898205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.898609] ? __pfx_lock_acquire+0x10/0x10 [ 35.898907] ? __pfx_mmap_region+0x10/0x10 [ 35.899203] ? security_mmap_addr+0x7d/0xa0 [ 35.899505] ? get_unmapped_area+0x1f5/0x3f0 [ 35.899811] do_mmap+0x854/0xf00 [ 35.900049] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.900322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.900643] ksys_mmap_pgoff+0x3af/0x500 [ 35.900916] do_syscall_64+0x3f/0x90 [ 35.901189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.901554] RIP: 0033:0x7f02f350fd82 [ 35.901805] 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 [ 35.902968] RSP: 002b:00007ffdd6d5ce98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.903477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02f350fd82 [ 35.903936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02f2949000 [ 35.904400] RBP: 00007f02f2949000 R08: 0000000000000009 R09: 0000000000001000 [ 35.904863] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607c2566ec0 [ 35.905330] R13: 00007ffdd6d5ceb0 R14: 00007ffdd6d5cee0 R15: 00007ffdd6d5d240 [ 35.905803] [ 35.905960] [ 35.906078] Allocated by task 213: [ 35.906316] kasan_save_stack+0x22/0x50 [ 35.906591] kasan_set_track+0x25/0x30 [ 35.906862] __kasan_slab_alloc+0x59/0x70 [ 35.907147] kmem_cache_alloc+0x16b/0x370 [ 35.907435] vm_area_dup+0x20/0x160 [ 35.907684] __split_vma+0x170/0x950 [ 35.907940] split_vma+0xc6/0x110 [ 35.908176] mprotect_fixup+0x8d2/0xb30 [ 35.908450] do_mprotect_pkey+0x87e/0xd40 [ 35.908728] __x64_sys_mprotect+0x78/0xc0 [ 35.909025] do_syscall_64+0x3f/0x90 [ 35.909290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.909646] [ 35.909768] Freed by task 210: [ 35.909983] kasan_save_stack+0x22/0x50 [ 35.910254] kasan_set_track+0x25/0x30 [ 35.910532] kasan_save_free_info+0x2b/0x50 [ 35.910824] __kasan_slab_free+0x10a/0x190 [ 35.911114] kmem_cache_free+0x10d/0x4d0 [ 35.911390] rcu_core+0x8c8/0x2860 [ 35.911637] __do_softirq+0x1b7/0x7d4 [ 35.911897] [ 35.912014] Last potentially related work creation: [ 35.912339] kasan_save_stack+0x22/0x50 [ 35.912621] __kasan_record_aux_stack+0x8e/0xa0 [ 35.912937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.913305] remove_vma+0x139/0x170 [ 35.913553] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.913858] do_vmi_munmap+0x1f1/0x2b0 [ 35.914122] __vm_munmap+0x138/0x3a0 [ 35.914381] __x64_sys_munmap+0x59/0x80 [ 35.914650] do_syscall_64+0x3f/0x90 [ 35.914910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.915259] [ 35.915376] Second to last potentially related work creation: [ 35.915751] kasan_save_stack+0x22/0x50 [ 35.916033] __kasan_record_aux_stack+0x8e/0xa0 [ 35.916376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.916766] remove_vma+0x139/0x170 [ 35.917034] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.917367] do_vmi_munmap+0x1f1/0x2b0 [ 35.917657] mmap_region+0x1f9/0x2660 [ 35.917938] do_mmap+0x854/0xf00 [ 35.918197] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.918482] ksys_mmap_pgoff+0x3af/0x500 [ 35.918780] do_syscall_64+0x3f/0x90 [ 35.919052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.919439] [ 35.919568] The buggy address belongs to the object at ffff88800e4f4d98 [ 35.919568] which belongs to the cache vm_area_struct of size 168 [ 35.920453] The buggy address is located 88 bytes inside of [ 35.920453] freed 168-byte region [ffff88800e4f4d98, ffff88800e4f4e40) [ 35.921294] [ 35.921416] The buggy address belongs to the physical page: [ 35.921815] page:00000000c3f09f6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4f4 [ 35.922452] memcg:ffff888009a3ca01 [ 35.922708] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.923098] page_type: 0xffffffff() [ 35.923367] raw: 0100000000000200 ffff88800879fc80 ffffea0000357ac0 dead000000000008 [ 35.923906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a3ca01 [ 35.924434] page dumped because: kasan: bad access detected [ 35.924839] [ 35.924980] Memory state around the buggy address: [ 35.925325] ffff88800e4f4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.925839] ffff88800e4f4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.926357] >ffff88800e4f4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.926863] ^ [ 35.927345] ffff88800e4f4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.927850] ffff88800e4f4e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.928349] ================================================================== [ 35.928905] Disabling lock debugging due to kernel taint [ 37.880155] BUG: Bad rss-counter state mm:00000000a43f38af type:MM_FILEPAGES val:33 [ 37.881378] BUG: Bad rss-counter state mm:00000000a43f38af type:MM_ANONPAGES val:22 [ 38.256549] BUG: Bad rss-counter state mm:00000000b136e860 type:MM_FILEPAGES val:33 [ 38.257566] BUG: Bad rss-counter state mm:00000000b136e860 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15250' (ECDSA) to the list of known hosts. 2023/06/20 02:53:34 fuzzer started 2023/06/20 02:53:34 dialing manager at localhost:44161 2023/06/20 02:53:34 checking machine... 2023/06/20 02:53:34 checking revisions... [ 38.965713] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:53:34 testing simple program... [ 39.017684] cgroup: Unknown subsys name 'net' [ 39.054494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:53:29 Registers: info registers vcpu 0 RAX=ffff88801ca68000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff888009469b40 RSI=ffffffff836535f9 RDI=ffff88801ca68078 RBP=fffffffffffffffe RSP=ffff8880175cfda8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88801ca68000 R13=0000000000000000 R14=ffff888019aa1140 R15=0000000000000024 RIP=ffffffff814c07e4 RFL=00000292 [--S-A--] 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 00007fc242c9c900 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=00007fc243251650 CR3=000000000f574000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffc17177cb8 CR3=000000000e07a000 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=2034333a33353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000