syzkaller login: [ 31.701854] BUG: Bad rss-counter state mm:0000000034afb14c type:MM_FILEPAGES val:33 [ 31.703603] BUG: Bad rss-counter state mm:0000000034afb14c type:MM_ANONPAGES val:22 [ 31.873533] ================================================================== [ 31.874540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.875545] Read of size 8 at addr ffff888018293a50 by task sshd/220 [ 31.876533] [ 31.876768] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.877793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.878863] Call Trace: [ 31.879208] [ 31.879516] dump_stack_lvl+0x91/0xf0 [ 31.880033] print_report+0xcc/0x620 [ 31.880547] ? __virt_addr_valid+0x102/0x340 [ 31.881147] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.881811] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.882469] kasan_report+0xbe/0xf0 [ 31.882978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.883645] vma_interval_tree_remove+0xc75/0xec0 [ 31.884296] vma_prepare+0xc54/0x11a0 [ 31.884805] __split_vma+0x5af/0x950 [ 31.885328] ? __pfx___split_vma+0x10/0x10 [ 31.885888] ? find_held_lock+0x2c/0x110 [ 31.886439] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.887042] ? lock_is_held_type+0x9f/0x120 [ 31.887614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.888265] ? mtree_range_walk+0x632/0x900 [ 31.888854] ? mas_walk+0x5c7/0x7c0 [ 31.889390] do_vmi_munmap+0x1f1/0x2b0 [ 31.889921] mmap_region+0x1f9/0x2660 [ 31.890438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.890982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.891741] ? __pfx_lock_acquire+0x10/0x10 [ 31.892309] ? __pfx_mmap_region+0x10/0x10 [ 31.892876] ? security_mmap_addr+0x7d/0xa0 [ 31.893454] ? get_unmapped_area+0x1f5/0x3f0 [ 31.894038] do_mmap+0x854/0xf00 [ 31.894515] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.895047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.895659] ksys_mmap_pgoff+0x3af/0x500 [ 31.896203] do_syscall_64+0x3f/0x90 [ 31.896718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.897412] RIP: 0033:0x7f4e7bdcbd82 [ 31.897897] 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 [ 31.900170] RSP: 002b:00007ffed3ffba68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.901153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e7bdcbd82 [ 31.902065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e7b205000 [ 31.902976] RBP: 00007f4e7b205000 R08: 0000000000000009 R09: 0000000000001000 [ 31.903881] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f713c0ec0 [ 31.904797] R13: 00007ffed3ffba80 R14: 00007ffed3ffbab0 R15: 00007ffed3ffbe10 [ 31.905741] [ 31.906058] [ 31.906291] Allocated by task 213: [ 31.906749] kasan_save_stack+0x22/0x50 [ 31.907306] kasan_set_track+0x25/0x30 [ 31.907842] __kasan_slab_alloc+0x59/0x70 [ 31.908411] kmem_cache_alloc+0x16b/0x370 [ 31.908974] vm_area_dup+0x20/0x160 [ 31.909478] __split_vma+0x170/0x950 [ 31.909990] split_vma+0xc6/0x110 [ 31.910464] mprotect_fixup+0x8d2/0xb30 [ 31.911011] do_mprotect_pkey+0x87e/0xd40 [ 31.911582] __x64_sys_mprotect+0x78/0xc0 [ 31.912154] do_syscall_64+0x3f/0x90 [ 31.912672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.913387] [ 31.913624] Freed by task 213: [ 31.914058] kasan_save_stack+0x22/0x50 [ 31.914614] kasan_set_track+0x25/0x30 [ 31.915161] kasan_save_free_info+0x2b/0x50 [ 31.915750] __kasan_slab_free+0x10a/0x190 [ 31.916339] kmem_cache_free+0x10d/0x4d0 [ 31.916895] rcu_core+0x8c8/0x2860 [ 31.917458] __do_softirq+0x1b7/0x7d4 [ 31.917989] [ 31.918226] Last potentially related work creation: [ 31.918862] kasan_save_stack+0x22/0x50 [ 31.919394] __kasan_record_aux_stack+0x8e/0xa0 [ 31.920002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.920693] remove_vma+0x139/0x170 [ 31.921202] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.921796] do_vmi_munmap+0x1f1/0x2b0 [ 31.922313] __vm_munmap+0x138/0x3a0 [ 31.922812] __x64_sys_munmap+0x59/0x80 [ 31.923352] do_syscall_64+0x3f/0x90 [ 31.923860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.924546] [ 31.924774] The buggy address belongs to the object at ffff8880182939f8 [ 31.924774] which belongs to the cache vm_area_struct of size 168 [ 31.926344] The buggy address is located 88 bytes inside of [ 31.926344] freed 168-byte region [ffff8880182939f8, ffff888018293aa0) [ 31.927843] [ 31.928075] The buggy address belongs to the physical page: [ 31.928770] page:00000000a2f96585 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18293 [ 31.929950] memcg:ffff88800eee7001 [ 31.930414] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.931102] page_type: 0xffffffff() [ 31.931581] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.932554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eee7001 [ 31.933541] page dumped because: kasan: bad access detected [ 31.934244] [ 31.934476] Memory state around the buggy address: [ 31.935090] ffff888018293900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.935993] ffff888018293980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.936917] >ffff888018293a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.937834] ^ [ 31.938583] ffff888018293a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.939496] ffff888018293b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.940406] ================================================================== [ 31.941454] Disabling lock debugging due to kernel taint [ 33.728085] BUG: Bad rss-counter state mm:0000000046e1e7ea type:MM_FILEPAGES val:33 [ 33.728805] BUG: Bad rss-counter state mm:0000000046e1e7ea type:MM_ANONPAGES val:22 [ 34.208935] BUG: Bad rss-counter state mm:00000000e87c8227 type:MM_FILEPAGES val:33 [ 34.210205] BUG: Bad rss-counter state mm:00000000e87c8227 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7311' (ECDSA) to the list of known hosts. 2023/06/20 00:18:23 fuzzer started 2023/06/20 00:18:23 dialing manager at localhost:44161 2023/06/20 00:18:23 checking machine... 2023/06/20 00:18:23 checking revisions... [ 34.974015] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:18:23 testing simple program... [ 35.026731] cgroup: Unknown subsys name 'net' [ 35.079320] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:18:22 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=00007fe955cee010 CR3=0000000016b86000 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=2032323a38313a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a38313a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019cc0000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab4224 RDI=ffff888019cc03f4 RBP=ffff888019cc0000 RSP=ffff8880168d74d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a4f00000a4f R12=ffff888019cc0000 R13=0000000000000045 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8137454d RFL=00000217 [----APC] 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 00007f43a1f14900 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=00007fff047a9000 CR3=000000000ee9a000 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