syzkaller login: [ 37.178587] BUG: Bad rss-counter state mm:00000000d97af4f7 type:MM_FILEPAGES val:33 [ 37.179657] BUG: Bad rss-counter state mm:00000000d97af4f7 type:MM_ANONPAGES val:22 [ 37.342618] ================================================================== [ 37.343891] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.344998] Read of size 8 at addr ffff88800ea96798 by task sshd/218 [ 37.345886] [ 37.346147] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.347106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.348170] Call Trace: [ 37.348523] [ 37.348831] dump_stack_lvl+0x91/0xf0 [ 37.349375] print_report+0xcc/0x620 [ 37.349919] ? __virt_addr_valid+0x102/0x340 [ 37.350542] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.351237] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.351944] kasan_report+0xbe/0xf0 [ 37.352490] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.353168] vma_interval_tree_remove+0xc75/0xec0 [ 37.353827] vma_prepare+0xc54/0x11a0 [ 37.354348] __split_vma+0x5af/0x950 [ 37.354876] ? __pfx___split_vma+0x10/0x10 [ 37.355477] ? find_held_lock+0x2c/0x110 [ 37.356051] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.356672] ? lock_is_held_type+0x9f/0x120 [ 37.357257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.357937] ? mtree_range_walk+0x632/0x900 [ 37.358544] ? mas_walk+0x5c7/0x7c0 [ 37.359060] do_vmi_munmap+0x1f1/0x2b0 [ 37.359612] mmap_region+0x1f9/0x2660 [ 37.360137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.360696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.361467] ? __pfx_lock_acquire+0x10/0x10 [ 37.362044] ? __pfx_mmap_region+0x10/0x10 [ 37.362622] ? security_mmap_addr+0x7d/0xa0 [ 37.363199] ? get_unmapped_area+0x1f5/0x3f0 [ 37.363839] do_mmap+0x854/0xf00 [ 37.364316] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.364850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.365466] ksys_mmap_pgoff+0x3af/0x500 [ 37.366038] do_syscall_64+0x3f/0x90 [ 37.366567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.367272] RIP: 0033:0x7ff560be0d82 [ 37.367773] 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 [ 37.370094] RSP: 002b:00007ffcff71c978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.371075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff560be0d82 [ 37.372004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff56001a000 [ 37.372919] RBP: 00007ff56001a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.373834] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0e488cd90 [ 37.374741] R13: 00007ffcff71c990 R14: 00007ffcff71c9c0 R15: 00007ffcff71cd20 [ 37.375693] [ 37.376012] [ 37.376243] Allocated by task 211: [ 37.376698] kasan_save_stack+0x22/0x50 [ 37.377251] kasan_set_track+0x25/0x30 [ 37.377780] __kasan_slab_alloc+0x59/0x70 [ 37.378354] kmem_cache_alloc+0x16b/0x370 [ 37.378913] vm_area_dup+0x20/0x160 [ 37.379437] __split_vma+0x170/0x950 [ 37.379954] split_vma+0xc6/0x110 [ 37.380428] mprotect_fixup+0x8d2/0xb30 [ 37.380959] do_mprotect_pkey+0x87e/0xd40 [ 37.381510] __x64_sys_mprotect+0x78/0xc0 [ 37.382067] do_syscall_64+0x3f/0x90 [ 37.382568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.383248] [ 37.383493] Freed by task 211: [ 37.383909] kasan_save_stack+0x22/0x50 [ 37.384442] kasan_set_track+0x25/0x30 [ 37.384966] kasan_save_free_info+0x2b/0x50 [ 37.385534] __kasan_slab_free+0x10a/0x190 [ 37.386098] kmem_cache_free+0x10d/0x4d0 [ 37.386637] rcu_core+0x8c8/0x2860 [ 37.387118] __do_softirq+0x1b7/0x7d4 [ 37.387628] [ 37.387862] Last potentially related work creation: [ 37.388500] kasan_save_stack+0x22/0x50 [ 37.389050] __kasan_record_aux_stack+0x8e/0xa0 [ 37.389677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.390382] remove_vma+0x139/0x170 [ 37.390883] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.391513] do_vmi_munmap+0x1f1/0x2b0 [ 37.392046] __vm_munmap+0x138/0x3a0 [ 37.392560] __x64_sys_munmap+0x59/0x80 [ 37.393105] do_syscall_64+0x3f/0x90 [ 37.393627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.394337] [ 37.394571] Second to last potentially related work creation: [ 37.395323] kasan_save_stack+0x22/0x50 [ 37.395875] __kasan_record_aux_stack+0x8e/0xa0 [ 37.396503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.397206] remove_vma+0x139/0x170 [ 37.397704] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.398319] do_vmi_munmap+0x1f1/0x2b0 [ 37.398852] mmap_region+0x1f9/0x2660 [ 37.399375] do_mmap+0x854/0xf00 [ 37.399865] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.400401] ksys_mmap_pgoff+0x3af/0x500 [ 37.400957] do_syscall_64+0x3f/0x90 [ 37.401476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.402183] [ 37.402416] The buggy address belongs to the object at ffff88800ea96740 [ 37.402416] which belongs to the cache vm_area_struct of size 168 [ 37.404022] The buggy address is located 88 bytes inside of [ 37.404022] freed 168-byte region [ffff88800ea96740, ffff88800ea967e8) [ 37.405556] [ 37.405790] The buggy address belongs to the physical page: [ 37.406503] page:000000005b8989bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea96 [ 37.407681] memcg:ffff88800bee5a01 [ 37.408141] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.408898] page_type: 0xffffffff() [ 37.409383] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 37.410385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bee5a01 [ 37.411374] page dumped because: kasan: bad access detected [ 37.412108] [ 37.412344] Memory state around the buggy address: [ 37.412971] ffff88800ea96680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.413904] ffff88800ea96700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.414809] >ffff88800ea96780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.415713] ^ [ 37.416231] ffff88800ea96800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.417121] ffff88800ea96880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.418045] ================================================================== [ 37.419171] Disabling lock debugging due to kernel taint [ 39.443941] BUG: Bad rss-counter state mm:000000007582d712 type:MM_FILEPAGES val:33 [ 39.445844] BUG: Bad rss-counter state mm:000000007582d712 type:MM_ANONPAGES val:22 [ 39.957163] BUG: Bad rss-counter state mm:00000000797bf7df type:MM_FILEPAGES val:33 [ 39.958162] BUG: Bad rss-counter state mm:00000000797bf7df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49156' (ECDSA) to the list of known hosts. 2023/06/20 06:12:26 fuzzer started 2023/06/20 06:12:26 dialing manager at localhost:44161 2023/06/20 06:12:26 checking machine... 2023/06/20 06:12:26 checking revisions... [ 40.686558] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:12:26 testing simple program... [ 40.742013] cgroup: Unknown subsys name 'net' [ 40.794706] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:12:19 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=00007fa528f2c650 CR3=000000000f090000 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=32313a3630203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732035323a3231 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343433 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=0000000000000000 RBX=ffff88800da68600 RCX=0000000000000000 RDX=ffff888015e251c0 RSI=ffffffff81f055ee RDI=ffff88800da68600 RBP=0000000000000015 RSP=ffff88800dabf800 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffffff854ee9e0 R14=ffffffff854ee9e0 R15=ffff88800da68600 RIP=ffffffff814c081b 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 00007f5c6df8c900 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=00007f5c6d424890 CR3=000000000d780000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b1f58d5562fd7cef00000000000ae988 XMM05=e700a3ab2c5444d30000000000136128 XMM06=bdf2e299e47b49d50000000000134ba8 XMM07=fb795ef6d657705600000000001240a0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000