syzkaller login: [ 30.724399] BUG: Bad rss-counter state mm:000000009f0056f8 type:MM_FILEPAGES val:33 [ 30.725605] BUG: Bad rss-counter state mm:000000009f0056f8 type:MM_ANONPAGES val:22 [ 30.764322] ================================================================== [ 30.765365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.766311] Read of size 8 at addr ffff88800efb13f8 by task sshd/220 [ 30.767220] [ 30.767444] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.768328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.769345] Call Trace: [ 30.769665] [ 30.769951] dump_stack_lvl+0x91/0xf0 [ 30.770445] print_report+0xcc/0x620 [ 30.770947] ? __virt_addr_valid+0x102/0x340 [ 30.771506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772129] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772757] kasan_report+0xbe/0xf0 [ 30.773239] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773867] vma_interval_tree_remove+0xc75/0xec0 [ 30.774468] vma_prepare+0xc54/0x11a0 [ 30.774966] __split_vma+0x5af/0x950 [ 30.775442] ? __pfx___split_vma+0x10/0x10 [ 30.775969] ? find_held_lock+0x2c/0x110 [ 30.776492] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.777067] ? lock_is_held_type+0x9f/0x120 [ 30.777619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.778222] ? mtree_range_walk+0x632/0x900 [ 30.778798] ? mas_walk+0x5c7/0x7c0 [ 30.779276] do_vmi_munmap+0x1f1/0x2b0 [ 30.779768] mmap_region+0x1f9/0x2660 [ 30.780249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.780756] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781469] ? __pfx_lock_acquire+0x10/0x10 [ 30.781998] ? __pfx_mmap_region+0x10/0x10 [ 30.782524] ? security_mmap_addr+0x7d/0xa0 [ 30.783071] ? get_unmapped_area+0x1f5/0x3f0 [ 30.783617] do_mmap+0x854/0xf00 [ 30.784059] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.785124] ksys_mmap_pgoff+0x3af/0x500 [ 30.785630] do_syscall_64+0x3f/0x90 [ 30.786103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786769] RIP: 0033:0x7fed86359d82 [ 30.787224] 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 [ 30.789423] RSP: 002b:00007ffed541afd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.790360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed86359d82 [ 30.791247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed85793000 [ 30.792115] RBP: 00007fed85793000 R08: 0000000000000009 R09: 0000000000001000 [ 30.792975] R10: 0000000000000812 R11: 0000000000000206 R12: 000056054a728f70 [ 30.793845] R13: 00007ffed541aff0 R14: 00007ffed541b020 R15: 00007ffed541b380 [ 30.794723] [ 30.795028] [ 30.795252] Allocated by task 213: [ 30.795681] kasan_save_stack+0x22/0x50 [ 30.796187] kasan_set_track+0x25/0x30 [ 30.796677] __kasan_slab_alloc+0x59/0x70 [ 30.797208] kmem_cache_alloc+0x16b/0x370 [ 30.797733] vm_area_dup+0x20/0x160 [ 30.798190] __split_vma+0x170/0x950 [ 30.798680] split_vma+0xc6/0x110 [ 30.799126] mprotect_fixup+0x8d2/0xb30 [ 30.799638] do_mprotect_pkey+0x87e/0xd40 [ 30.800163] __x64_sys_mprotect+0x78/0xc0 [ 30.800694] do_syscall_64+0x3f/0x90 [ 30.801170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801815] [ 30.802034] Freed by task 213: [ 30.802429] kasan_save_stack+0x22/0x50 [ 30.802949] kasan_set_track+0x25/0x30 [ 30.803448] kasan_save_free_info+0x2b/0x50 [ 30.803981] __kasan_slab_free+0x10a/0x190 [ 30.804521] kmem_cache_free+0x10d/0x4d0 [ 30.805031] rcu_core+0x8c8/0x2860 [ 30.805484] __do_softirq+0x1b7/0x7d4 [ 30.805968] [ 30.806186] Last potentially related work creation: [ 30.806782] kasan_save_stack+0x22/0x50 [ 30.807286] __kasan_record_aux_stack+0x8e/0xa0 [ 30.807862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.808515] remove_vma+0x139/0x170 [ 30.808966] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.809529] do_vmi_munmap+0x1f1/0x2b0 [ 30.810018] __vm_munmap+0x138/0x3a0 [ 30.810491] __x64_sys_munmap+0x59/0x80 [ 30.811009] do_syscall_64+0x3f/0x90 [ 30.811492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812159] [ 30.812377] The buggy address belongs to the object at ffff88800efb13a0 [ 30.812377] which belongs to the cache vm_area_struct of size 168 [ 30.813851] The buggy address is located 88 bytes inside of [ 30.813851] freed 168-byte region [ffff88800efb13a0, ffff88800efb1448) [ 30.815308] [ 30.815532] The buggy address belongs to the physical page: [ 30.816212] page:000000000a84e9da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefb1 [ 30.817350] memcg:ffff888018c67101 [ 30.817787] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.818433] page_type: 0xffffffff() [ 30.818902] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.819854] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c67101 [ 30.820769] page dumped because: kasan: bad access detected [ 30.821439] [ 30.821659] Memory state around the buggy address: [ 30.822236] ffff88800efb1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.823099] ffff88800efb1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.823958] >ffff88800efb1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.824819] ^ [ 30.825666] ffff88800efb1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.826545] ffff88800efb1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827424] ================================================================== [ 30.828497] Disabling lock debugging due to kernel taint [ 33.540389] BUG: Bad rss-counter state mm:000000009f50ade6 type:MM_FILEPAGES val:33 [ 33.541342] BUG: Bad rss-counter state mm:000000009f50ade6 type:MM_ANONPAGES val:22 [ 34.004551] BUG: Bad rss-counter state mm:00000000ae82ef5e type:MM_FILEPAGES val:33 [ 34.005561] BUG: Bad rss-counter state mm:00000000ae82ef5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24822' (ECDSA) to the list of known hosts. 2023/06/21 03:43:31 fuzzer started 2023/06/21 03:43:31 dialing manager at localhost:36067 2023/06/21 03:43:31 checking machine... 2023/06/21 03:43:31 checking revisions... [ 34.728030] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:43:31 testing simple program... [ 34.764509] cgroup: Unknown subsys name 'net' [ 34.810668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:43:31 Registers: info registers vcpu 0 RAX=fffff940000bc398 RBX=fffff940000bc399 RCX=ffffffff81668833 RDX=fffff940000bc399 RSI=0000000000000008 RDI=ffffea00005e1cc0 RBP=fffff940000bc398 RSP=ffff888019f17640 R8 =0000000000000000 R9 =fffff940000bc398 R10=ffffea00005e1cc7 R11=00000000000b6a61 R12=ffff888016054d98 R13=00000000000362c0 R14=ffff888016054d98 R15=0000000000000504 RIP=ffffffff8180f189 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 00007f4554a66700 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=00007f67b83aaf50 CR3=0000000017dfc000 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=2031333a33343a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a33343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c04400 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=00007ffe1b577d98 CR3=0000000005482000 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=00007f8c61270510000055ddff02c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000