syzkaller login: [ 31.702820] BUG: Bad rss-counter state mm:00000000640055dc type:MM_FILEPAGES val:33 [ 31.704156] BUG: Bad rss-counter state mm:00000000640055dc type:MM_ANONPAGES val:22 [ 31.864110] ================================================================== [ 31.865192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.866301] Read of size 8 at addr ffff888016e6c5c8 by task sshd/220 [ 31.867345] [ 31.867599] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.868614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.869695] Call Trace: [ 31.870045] <TASK> [ 31.870364] dump_stack_lvl+0x91/0xf0 [ 31.870875] print_report+0xcc/0x620 [ 31.871444] ? __virt_addr_valid+0x102/0x340 [ 31.872114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.872845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873581] kasan_report+0xbe/0xf0 [ 31.874163] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874911] vma_interval_tree_remove+0xc75/0xec0 [ 31.875643] vma_prepare+0xc54/0x11a0 [ 31.876228] __split_vma+0x5af/0x950 [ 31.876781] ? __pfx___split_vma+0x10/0x10 [ 31.877417] ? find_held_lock+0x2c/0x110 [ 31.878045] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878752] ? lock_is_held_type+0x9f/0x120 [ 31.879401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.880126] ? mtree_range_walk+0x632/0x900 [ 31.880785] ? mas_walk+0x5c7/0x7c0 [ 31.881360] do_vmi_munmap+0x1f1/0x2b0 [ 31.881941] mmap_region+0x1f9/0x2660 [ 31.882556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.883121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.883855] ? __pfx_lock_acquire+0x10/0x10 [ 31.884401] ? __pfx_mmap_region+0x10/0x10 [ 31.884936] ? security_mmap_addr+0x7d/0xa0 [ 31.885480] ? get_unmapped_area+0x1f5/0x3f0 [ 31.886031] do_mmap+0x854/0xf00 [ 31.886503] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.887004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.887575] ksys_mmap_pgoff+0x3af/0x500 [ 31.888096] do_syscall_64+0x3f/0x90 [ 31.888591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.889237] RIP: 0033:0x7fb780f90d82 [ 31.889710] 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 [ 31.891902] RSP: 002b:00007ffe8ee7d578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.892830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb780f90d82 [ 31.893692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7803ca000 [ 31.894565] RBP: 00007fb7803ca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.895414] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a112f73ec0 [ 31.896283] R13: 00007ffe8ee7d590 R14: 00007ffe8ee7d5c0 R15: 00007ffe8ee7d920 [ 31.897164] </TASK> [ 31.897456] [ 31.897679] Allocated by task 213: [ 31.898117] kasan_save_stack+0x22/0x50 [ 31.898646] kasan_set_track+0x25/0x30 [ 31.899136] __kasan_slab_alloc+0x59/0x70 [ 31.899685] kmem_cache_alloc+0x16b/0x370 [ 31.900213] vm_area_dup+0x20/0x160 [ 31.900683] __split_vma+0x170/0x950 [ 31.901153] split_vma+0xc6/0x110 [ 31.901596] mprotect_fixup+0x8d2/0xb30 [ 31.902109] do_mprotect_pkey+0x87e/0xd40 [ 31.902658] __x64_sys_mprotect+0x78/0xc0 [ 31.903201] do_syscall_64+0x3f/0x90 [ 31.903679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.904345] [ 31.904557] Freed by task 213: [ 31.904965] kasan_save_stack+0x22/0x50 [ 31.905478] kasan_set_track+0x25/0x30 [ 31.905985] kasan_save_free_info+0x2b/0x50 [ 31.906527] __kasan_slab_free+0x10a/0x190 [ 31.907075] kmem_cache_free+0x10d/0x4d0 [ 31.907583] rcu_core+0x8c8/0x2860 [ 31.908037] __do_softirq+0x1b7/0x7d4 [ 31.908605] [ 31.908838] Last potentially related work creation: [ 31.909430] kasan_save_stack+0x22/0x50 [ 31.909952] __kasan_record_aux_stack+0x8e/0xa0 [ 31.910547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.911221] remove_vma+0x139/0x170 [ 31.911677] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.912257] do_vmi_munmap+0x1f1/0x2b0 [ 31.912740] __vm_munmap+0x138/0x3a0 [ 31.913228] __x64_sys_munmap+0x59/0x80 [ 31.913732] do_syscall_64+0x3f/0x90 [ 31.914242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.914899] [ 31.915137] Second to last potentially related work creation: [ 31.915819] kasan_save_stack+0x22/0x50 [ 31.916350] __kasan_record_aux_stack+0x8e/0xa0 [ 31.916933] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.917575] remove_vma+0x139/0x170 [ 31.918047] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.918620] do_vmi_munmap+0x1f1/0x2b0 [ 31.919138] mmap_region+0x1f9/0x2660 [ 31.919616] do_mmap+0x854/0xf00 [ 31.920051] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.920550] ksys_mmap_pgoff+0x3af/0x500 [ 31.921057] do_syscall_64+0x3f/0x90 [ 31.921552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.922215] [ 31.922460] The buggy address belongs to the object at ffff888016e6c570 [ 31.922460] which belongs to the cache vm_area_struct of size 168 [ 31.923941] The buggy address is located 88 bytes inside of [ 31.923941] freed 168-byte region [ffff888016e6c570, ffff888016e6c618) [ 31.925397] [ 31.925620] The buggy address belongs to the physical page: [ 31.926322] page:00000000171211fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e6c [ 31.927430] memcg:ffff888010312c01 [ 31.927858] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.928540] page_type: 0xffffffff() [ 31.928991] raw: 0100000000000200 ffff8880087a0c80 ffffea00003efd40 dead000000000002 [ 31.929918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010312c01 [ 31.930853] page dumped because: kasan: bad access detected [ 31.931528] [ 31.931744] Memory state around the buggy address: [ 31.932324] ffff888016e6c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.933216] ffff888016e6c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.934089] >ffff888016e6c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.934988] ^ [ 31.935670] ffff888016e6c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.936545] ffff888016e6c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.937415] ================================================================== [ 31.938382] Disabling lock debugging due to kernel taint [ 33.939363] BUG: Bad rss-counter state mm:000000000773bb2e type:MM_FILEPAGES val:33 [ 33.940615] BUG: Bad rss-counter state mm:000000000773bb2e type:MM_ANONPAGES val:22 [ 34.345917] BUG: Bad rss-counter state mm:000000006e3c0d85 type:MM_FILEPAGES val:33 [ 34.347071] BUG: Bad rss-counter state mm:000000006e3c0d85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14857' (ECDSA) to the list of known hosts. 2023/06/21 03:32:17 fuzzer started 2023/06/21 03:32:18 dialing manager at localhost:36067 2023/06/21 03:32:18 checking machine... 2023/06/21 03:32:18 checking revisions... [ 35.060840] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:32:18 testing simple program... [ 35.104803] cgroup: Unknown subsys name 'net' [ 35.147418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:32:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81363cba RDX=1ffff1100d9c745a RSI=0000000000000008 RDI=ffff88806ce3a2d0 RBP=ffff88806ce3a2c0 RSP=ffff888008da7d08 R8 =0000000000000000 R9 =ffffffff85616780 R10=ffff88806ce3a2d2 R11=0000000000000003 R12=ffffffff85616740 R13=00000000000065a0 R14=ffff88806ce3a2d4 R15=0000000000000000 RIP=ffffffff8136a3e5 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 =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=00007f6eb6021930 CR3=0000000019424000 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=2037313a32333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a32333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a81e40 RBX=0000000000000001 RCX=1ffff110019db0a0 RDX=dffffc0000000000 RSI=0000000000000004 RDI=ffff88800ced8574 RBP=00000000000000e8 RSP=ffff88801c23f6b8 R8 =0000000000000001 R9 =ffffed10019db0aa R10=ffff88800ced8553 R11=00000000000b6a61 R12=ffff888016983140 R13=0000000000000000 R14=ffff88800ced8508 R15=ffff88800ced84c0 RIP=ffffffff818474c8 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 00007fd36ca21900 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=00007ffd2af59000 CR3=000000000df6c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000