syzkaller login: [ 29.046669] BUG: Bad rss-counter state mm:000000006c86c590 type:MM_FILEPAGES val:33 [ 29.047865] BUG: Bad rss-counter state mm:000000006c86c590 type:MM_ANONPAGES val:22 [ 29.214310] ================================================================== [ 29.215221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.216155] Read of size 8 at addr ffff888014363ed8 by task sshd/220 [ 29.216925] [ 29.217213] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.218064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.219019] Call Trace: [ 29.219351] [ 29.219630] dump_stack_lvl+0x91/0xf0 [ 29.220114] print_report+0xcc/0x620 [ 29.220592] ? __virt_addr_valid+0x102/0x340 [ 29.221155] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.221773] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.222383] kasan_report+0xbe/0xf0 [ 29.222855] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.223470] vma_interval_tree_remove+0xc75/0xec0 [ 29.224067] vma_prepare+0xc54/0x11a0 [ 29.224540] __split_vma+0x5af/0x950 [ 29.225027] ? __pfx___split_vma+0x10/0x10 [ 29.225575] ? find_held_lock+0x2c/0x110 [ 29.226094] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.226650] ? lock_is_held_type+0x9f/0x120 [ 29.227177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.227774] ? mtree_range_walk+0x632/0x900 [ 29.228326] ? mas_walk+0x5c7/0x7c0 [ 29.228814] do_vmi_munmap+0x1f1/0x2b0 [ 29.229301] mmap_region+0x1f9/0x2660 [ 29.229783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.230292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.230996] ? __pfx_lock_acquire+0x10/0x10 [ 29.231533] ? __pfx_mmap_region+0x10/0x10 [ 29.232059] ? security_mmap_addr+0x7d/0xa0 [ 29.232589] ? get_unmapped_area+0x1f5/0x3f0 [ 29.233141] do_mmap+0x854/0xf00 [ 29.233572] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.234071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.234636] ksys_mmap_pgoff+0x3af/0x500 [ 29.235141] do_syscall_64+0x3f/0x90 [ 29.235616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.236252] RIP: 0033:0x7fd57da0ad82 [ 29.236716] 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 [ 29.238823] RSP: 002b:00007ffc0a72e8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.239717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd57da0ad82 [ 29.240553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd57ce44000 [ 29.241396] RBP: 00007fd57ce44000 R08: 0000000000000009 R09: 0000000000001000 [ 29.242234] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578aa18ff70 [ 29.243067] R13: 00007ffc0a72e8e0 R14: 00007ffc0a72e910 R15: 00007ffc0a72ec70 [ 29.243912] [ 29.244200] [ 29.244415] Allocated by task 212: [ 29.244844] kasan_save_stack+0x22/0x50 [ 29.245348] kasan_set_track+0x25/0x30 [ 29.245839] __kasan_slab_alloc+0x59/0x70 [ 29.246357] kmem_cache_alloc+0x16b/0x370 [ 29.246869] vm_area_dup+0x20/0x160 [ 29.247326] __split_vma+0x170/0x950 [ 29.247785] split_vma+0xc6/0x110 [ 29.248218] mprotect_fixup+0x8d2/0xb30 [ 29.248737] do_mprotect_pkey+0x87e/0xd40 [ 29.249252] __x64_sys_mprotect+0x78/0xc0 [ 29.249762] do_syscall_64+0x3f/0x90 [ 29.250235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.250874] [ 29.251096] Freed by task 212: [ 29.251483] kasan_save_stack+0x22/0x50 [ 29.251976] kasan_set_track+0x25/0x30 [ 29.252463] kasan_save_free_info+0x2b/0x50 [ 29.252998] __kasan_slab_free+0x10a/0x190 [ 29.253531] kmem_cache_free+0x10d/0x4d0 [ 29.254030] rcu_core+0x8c8/0x2860 [ 29.254487] __do_softirq+0x1b7/0x7d4 [ 29.254965] [ 29.255176] Last potentially related work creation: [ 29.255754] kasan_save_stack+0x22/0x50 [ 29.256251] __kasan_record_aux_stack+0x8e/0xa0 [ 29.256830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.257484] remove_vma+0x139/0x170 [ 29.257934] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.258484] do_vmi_munmap+0x1f1/0x2b0 [ 29.258969] __vm_munmap+0x138/0x3a0 [ 29.259433] __x64_sys_munmap+0x59/0x80 [ 29.259922] do_syscall_64+0x3f/0x90 [ 29.260400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.261045] [ 29.261256] The buggy address belongs to the object at ffff888014363e80 [ 29.261256] which belongs to the cache vm_area_struct of size 168 [ 29.262719] The buggy address is located 88 bytes inside of [ 29.262719] freed 168-byte region [ffff888014363e80, ffff888014363f28) [ 29.264102] [ 29.264321] The buggy address belongs to the physical page: [ 29.264977] page:00000000e34bbeb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14363 [ 29.266049] memcg:ffff88800f6c7b01 [ 29.266479] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.267116] page_type: 0xffffffff() [ 29.267564] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.268479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6c7b01 [ 29.269401] page dumped because: kasan: bad access detected [ 29.270059] [ 29.270272] Memory state around the buggy address: [ 29.270853] ffff888014363d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.271697] ffff888014363e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.272543] >ffff888014363e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.273389] ^ [ 29.274109] ffff888014363f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.274963] ffff888014363f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.275810] ================================================================== [ 29.276938] Disabling lock debugging due to kernel taint [ 31.154904] BUG: Bad rss-counter state mm:0000000068ce0c89 type:MM_FILEPAGES val:33 [ 31.156580] BUG: Bad rss-counter state mm:0000000068ce0c89 type:MM_ANONPAGES val:22 [ 31.760694] BUG: Bad rss-counter state mm:00000000983847b9 type:MM_FILEPAGES val:33 [ 31.761877] BUG: Bad rss-counter state mm:00000000983847b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56027' (ECDSA) to the list of known hosts. 2023/06/19 16:09:11 fuzzer started 2023/06/19 16:09:11 dialing manager at localhost:44161 2023/06/19 16:09:11 checking machine... 2023/06/19 16:09:11 checking revisions... [ 32.392624] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:09:11 testing simple program... [ 32.442018] cgroup: Unknown subsys name 'net' [ 32.482030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:09:10 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=00007fbcb6b4d780 CR3=0000000015ed6000 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=2030313a39303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001f8af6d RBX=1ffff11001f8af6d RCX=1ffff11001a2aea0 RDX=0000000000000003 RSI=ffff88800e5b2304 RDI=ffff88800d15759c RBP=0000000000000138 RSP=ffff88800fc57b68 R8 =0000000000000001 R9 =ffff88800d15759c R10=ffff88800d157553 R11=00000000000b6996 R12=ffff888018bbc2f0 R13=0000000000000000 R14=ffff88800d157508 R15=ffff88800d1574c0 RIP=ffffffff81845fdc RFL=00000282 [--S----] 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 00007fe54cdd8900 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=00007fff9eab7000 CR3=000000000e60a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000