syzkaller login: [ 32.726172] BUG: Bad rss-counter state mm:000000008de62595 type:MM_FILEPAGES val:33 [ 32.727156] BUG: Bad rss-counter state mm:000000008de62595 type:MM_ANONPAGES val:22 [ 32.885396] ================================================================== [ 32.886474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.887592] Read of size 8 at addr ffff88800d96c140 by task sshd/221 [ 32.888519] [ 32.888850] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.889883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.891040] Call Trace: [ 32.891441] [ 32.891726] dump_stack_lvl+0x91/0xf0 [ 32.892215] print_report+0xcc/0x620 [ 32.892697] ? __virt_addr_valid+0x102/0x340 [ 32.893253] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.893875] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.894483] kasan_report+0xbe/0xf0 [ 32.894952] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.895581] vma_interval_tree_remove+0xc75/0xec0 [ 32.896187] vma_prepare+0xc54/0x11a0 [ 32.896672] __split_vma+0x5af/0x950 [ 32.897143] ? __pfx___split_vma+0x10/0x10 [ 32.897671] ? find_held_lock+0x2c/0x110 [ 32.898194] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.898760] ? lock_is_held_type+0x9f/0x120 [ 32.899304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.899909] ? mtree_range_walk+0x632/0x900 [ 32.900458] ? mas_walk+0x5c7/0x7c0 [ 32.900931] do_vmi_munmap+0x1f1/0x2b0 [ 32.901423] mmap_region+0x1f9/0x2660 [ 32.901904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.902419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.903131] ? __pfx_lock_acquire+0x10/0x10 [ 32.903688] ? __pfx_mmap_region+0x10/0x10 [ 32.904221] ? security_mmap_addr+0x7d/0xa0 [ 32.904755] ? get_unmapped_area+0x1f5/0x3f0 [ 32.905305] do_mmap+0x854/0xf00 [ 32.905744] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.906239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.906798] ksys_mmap_pgoff+0x3af/0x500 [ 32.907311] do_syscall_64+0x3f/0x90 [ 32.907796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.908448] RIP: 0033:0x7efcf6a59d82 [ 32.908903] 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 [ 32.911033] RSP: 002b:00007ffe568e0168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.911951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcf6a59d82 [ 32.912799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcf5e93000 [ 32.913645] RBP: 00007efcf5e93000 R08: 0000000000000009 R09: 0000000000001000 [ 32.914488] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c0e68eec0 [ 32.915346] R13: 00007ffe568e0180 R14: 00007ffe568e01b0 R15: 00007ffe568e0510 [ 32.916202] [ 32.916493] [ 32.916706] Allocated by task 214: [ 32.917137] kasan_save_stack+0x22/0x50 [ 32.917642] kasan_set_track+0x25/0x30 [ 32.918134] __kasan_slab_alloc+0x59/0x70 [ 32.918653] kmem_cache_alloc+0x16b/0x370 [ 32.919173] vm_area_dup+0x20/0x160 [ 32.919633] __split_vma+0x170/0x950 [ 32.920097] split_vma+0xc6/0x110 [ 32.920534] mprotect_fixup+0x8d2/0xb30 [ 32.921038] do_mprotect_pkey+0x87e/0xd40 [ 32.921560] __x64_sys_mprotect+0x78/0xc0 [ 32.922079] do_syscall_64+0x3f/0x90 [ 32.922555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.923207] [ 32.923424] Freed by task 214: [ 32.923816] kasan_save_stack+0x22/0x50 [ 32.924320] kasan_set_track+0x25/0x30 [ 32.924818] kasan_save_free_info+0x2b/0x50 [ 32.925349] __kasan_slab_free+0x10a/0x190 [ 32.925882] kmem_cache_free+0x10d/0x4d0 [ 32.926389] rcu_core+0x8c8/0x2860 [ 32.926840] __do_softirq+0x1b7/0x7d4 [ 32.927331] [ 32.927547] Last potentially related work creation: [ 32.928133] kasan_save_stack+0x22/0x50 [ 32.928636] __kasan_record_aux_stack+0x8e/0xa0 [ 32.929208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.929851] remove_vma+0x139/0x170 [ 32.930327] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.930890] do_vmi_munmap+0x1f1/0x2b0 [ 32.931382] __vm_munmap+0x138/0x3a0 [ 32.931847] __x64_sys_munmap+0x59/0x80 [ 32.932342] do_syscall_64+0x3f/0x90 [ 32.932818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.933462] [ 32.933684] The buggy address belongs to the object at ffff88800d96c0e8 [ 32.933684] which belongs to the cache vm_area_struct of size 168 [ 32.935155] The buggy address is located 88 bytes inside of [ 32.935155] freed 168-byte region [ffff88800d96c0e8, ffff88800d96c190) [ 32.936565] [ 32.936783] The buggy address belongs to the physical page: [ 32.937444] page:000000006bc2c7ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd96c [ 32.938546] memcg:ffff88800ec2c001 [ 32.938976] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.939655] page_type: 0xffffffff() [ 32.940108] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.941039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec2c001 [ 32.941965] page dumped because: kasan: bad access detected [ 32.942639] [ 32.942859] Memory state around the buggy address: [ 32.943465] ffff88800d96c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.944320] ffff88800d96c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.945193] >ffff88800d96c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.946074] ^ [ 32.946719] ffff88800d96c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.947597] ffff88800d96c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.948463] ================================================================== [ 32.949420] Disabling lock debugging due to kernel taint [ 34.852125] BUG: Bad rss-counter state mm:00000000fdb3f777 type:MM_FILEPAGES val:33 [ 34.853636] BUG: Bad rss-counter state mm:00000000fdb3f777 type:MM_ANONPAGES val:22 [ 35.325630] BUG: Bad rss-counter state mm:0000000037bf31be type:MM_FILEPAGES val:33 [ 35.326850] BUG: Bad rss-counter state mm:0000000037bf31be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59157' (ECDSA) to the list of known hosts. 2023/06/19 20:34:31 fuzzer started 2023/06/19 20:34:31 dialing manager at localhost:44161 2023/06/19 20:34:31 checking machine... 2023/06/19 20:34:31 checking revisions... [ 36.040191] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:34:31 testing simple program... [ 36.091837] cgroup: Unknown subsys name 'net' [ 36.130235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:34:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f57a8212ff0 CR3=000000001684c000 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=2031333a34333a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019e9d69 RBX=ffff88800cf4eb18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cf4eb48 RBP=ffff88800cf131d0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff88800cf03b00 R14=ffffffff813782a8 R15=ffff8880165f8580 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f326ffd1900 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=00007f3270b25044 CR3=000000000e1f8000 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=000000000000000000000000000000ff XMM02=8b9b17c27e56021cb0a45ad61919f4ae XMM03=8038a69d2a41729b8ad50e67738202a9 XMM04=aefcc75c21c784a08d3dc4673238dba8 XMM05=000000000000000000000000000000ff XMM06=8038a65c2141729b8a3d0e67323802a8 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000