syzkaller login: [ 31.016857] BUG: Bad rss-counter state mm:0000000098793dfa type:MM_FILEPAGES val:33 [ 31.017941] BUG: Bad rss-counter state mm:0000000098793dfa type:MM_ANONPAGES val:22 [ 31.195549] ================================================================== [ 31.196512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.197508] Read of size 8 at addr ffff8880099d3b38 by task sshd/220 [ 31.198445] [ 31.198683] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.199609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.200680] Call Trace: [ 31.201016] [ 31.201322] dump_stack_lvl+0x91/0xf0 [ 31.201851] print_report+0xcc/0x620 [ 31.202365] ? __virt_addr_valid+0x102/0x340 [ 31.202950] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204270] kasan_report+0xbe/0xf0 [ 31.204787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205451] vma_interval_tree_remove+0xc75/0xec0 [ 31.206095] vma_prepare+0xc54/0x11a0 [ 31.206612] __split_vma+0x5af/0x950 [ 31.207116] ? __pfx___split_vma+0x10/0x10 [ 31.207679] ? find_held_lock+0x2c/0x110 [ 31.208236] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208835] ? lock_is_held_type+0x9f/0x120 [ 31.209417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.210084] ? mtree_range_walk+0x632/0x900 [ 31.210682] ? mas_walk+0x5c7/0x7c0 [ 31.211189] do_vmi_munmap+0x1f1/0x2b0 [ 31.211713] mmap_region+0x1f9/0x2660 [ 31.212234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.212783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213548] ? __pfx_lock_acquire+0x10/0x10 [ 31.214127] ? __pfx_mmap_region+0x10/0x10 [ 31.214691] ? security_mmap_addr+0x7d/0xa0 [ 31.215260] ? get_unmapped_area+0x1f5/0x3f0 [ 31.215846] do_mmap+0x854/0xf00 [ 31.216323] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.217465] ksys_mmap_pgoff+0x3af/0x500 [ 31.218026] do_syscall_64+0x3f/0x90 [ 31.218546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219233] RIP: 0033:0x7f80f698ed82 [ 31.219729] 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 [ 31.222035] RSP: 002b:00007ffd4302b338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80f698ed82 [ 31.223923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80f5dc8000 [ 31.224849] RBP: 00007f80f5dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225764] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563aa41bbec0 [ 31.226677] R13: 00007ffd4302b350 R14: 00007ffd4302b380 R15: 00007ffd4302b6e0 [ 31.227590] [ 31.227903] [ 31.228133] Allocated by task 213: [ 31.228591] kasan_save_stack+0x22/0x50 [ 31.229131] kasan_set_track+0x25/0x30 [ 31.229653] __kasan_slab_alloc+0x59/0x70 [ 31.230225] kmem_cache_alloc+0x16b/0x370 [ 31.230811] vm_area_dup+0x20/0x160 [ 31.231310] __split_vma+0x170/0x950 [ 31.231817] split_vma+0xc6/0x110 [ 31.232301] mprotect_fixup+0x8d2/0xb30 [ 31.232836] do_mprotect_pkey+0x87e/0xd40 [ 31.233394] __x64_sys_mprotect+0x78/0xc0 [ 31.233971] do_syscall_64+0x3f/0x90 [ 31.234488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235186] [ 31.235414] Freed by task 213: [ 31.235830] kasan_save_stack+0x22/0x50 [ 31.236382] kasan_set_track+0x25/0x30 [ 31.236914] kasan_save_free_info+0x2b/0x50 [ 31.237481] __kasan_slab_free+0x10a/0x190 [ 31.238068] kmem_cache_free+0x10d/0x4d0 [ 31.238617] rcu_core+0x8c8/0x2860 [ 31.239094] __do_softirq+0x1b7/0x7d4 [ 31.239609] [ 31.239841] Last potentially related work creation: [ 31.240471] kasan_save_stack+0x22/0x50 [ 31.241010] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.242327] remove_vma+0x139/0x170 [ 31.242825] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.243429] do_vmi_munmap+0x1f1/0x2b0 [ 31.243953] __vm_munmap+0x138/0x3a0 [ 31.244451] __x64_sys_munmap+0x59/0x80 [ 31.244985] do_syscall_64+0x3f/0x90 [ 31.245505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246208] [ 31.246440] Second to last potentially related work creation: [ 31.247170] kasan_save_stack+0x22/0x50 [ 31.247710] __kasan_record_aux_stack+0x8e/0xa0 [ 31.248328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249019] remove_vma+0x139/0x170 [ 31.249505] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250110] do_vmi_munmap+0x1f1/0x2b0 [ 31.250632] mmap_region+0x1f9/0x2660 [ 31.251140] do_mmap+0x854/0xf00 [ 31.251600] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.252117] ksys_mmap_pgoff+0x3af/0x500 [ 31.252653] do_syscall_64+0x3f/0x90 [ 31.253160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253857] [ 31.254086] The buggy address belongs to the object at ffff8880099d3ae0 [ 31.254086] which belongs to the cache vm_area_struct of size 168 [ 31.255656] The buggy address is located 88 bytes inside of [ 31.255656] freed 168-byte region [ffff8880099d3ae0, ffff8880099d3b88) [ 31.257165] [ 31.257396] The buggy address belongs to the physical page: [ 31.258114] page:00000000da565dbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99d3 [ 31.259268] memcg:ffff88800ec62301 [ 31.259719] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.260463] page_type: 0xffffffff() [ 31.260945] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c9600 dead000000000005 [ 31.261932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec62301 [ 31.262908] page dumped because: kasan: bad access detected [ 31.263611] [ 31.263840] Memory state around the buggy address: [ 31.264459] ffff8880099d3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.265373] ffff8880099d3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.266291] >ffff8880099d3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.267201] ^ [ 31.267854] ffff8880099d3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.268763] ffff8880099d3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.269666] ================================================================== [ 31.270761] Disabling lock debugging due to kernel taint [ 34.280618] BUG: Bad rss-counter state mm:00000000210bbf7a type:MM_FILEPAGES val:33 [ 34.282028] BUG: Bad rss-counter state mm:00000000210bbf7a type:MM_ANONPAGES val:22 [ 34.762222] BUG: Bad rss-counter state mm:000000000df15b94 type:MM_FILEPAGES val:33 [ 34.763285] BUG: Bad rss-counter state mm:000000000df15b94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56304' (ECDSA) to the list of known hosts. 2023/06/20 12:35:05 fuzzer started 2023/06/20 12:35:05 dialing manager at localhost:36067 2023/06/20 12:35:05 checking machine... 2023/06/20 12:35:05 checking revisions... [ 35.475720] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:35:05 testing simple program... [ 35.530078] cgroup: Unknown subsys name 'net' [ 35.588778] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff818d5030 RDX=ffff888016bc1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888014747c58 RSP=ffff888014747928 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88806cc55298 R13=ffff8880143011a0 R14=ffff888014747c80 R15=ffff888014747c58 RIP=ffffffff814c027c 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 00007f693f2cd900 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=00007fe6ebf38650 CR3=000000000c678000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=59e5f445dea60e3500000000000ae988 XMM05=cd5bb5d4ed0bc9b00000000000133c40 XMM06=4fda316b135da52b0000000000132a30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffc4a160f98 CR3=0000000016a64000 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=35333a3231203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363136 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000