syzkaller login: [ 31.050480] BUG: Bad rss-counter state mm:000000001f4a06b3 type:MM_FILEPAGES val:33 [ 31.051880] BUG: Bad rss-counter state mm:000000001f4a06b3 type:MM_ANONPAGES val:22 [ 31.207729] ================================================================== [ 31.208631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.209562] Read of size 8 at addr ffff88800f2a4140 by task sshd/219 [ 31.210330] [ 31.210550] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.211532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.212504] Call Trace: [ 31.212819] [ 31.213201] dump_stack_lvl+0x91/0xf0 [ 31.213781] print_report+0xcc/0x620 [ 31.214376] ? __virt_addr_valid+0x102/0x340 [ 31.215027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215756] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216477] kasan_report+0xbe/0xf0 [ 31.217049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217808] vma_interval_tree_remove+0xc75/0xec0 [ 31.218546] vma_prepare+0xc54/0x11a0 [ 31.219136] __split_vma+0x5af/0x950 [ 31.219715] ? __pfx___split_vma+0x10/0x10 [ 31.220358] ? find_held_lock+0x2c/0x110 [ 31.220990] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.221681] ? lock_is_held_type+0x9f/0x120 [ 31.222344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.223087] ? mtree_range_walk+0x632/0x900 [ 31.223756] ? mas_walk+0x5c7/0x7c0 [ 31.224336] do_vmi_munmap+0x1f1/0x2b0 [ 31.224937] mmap_region+0x1f9/0x2660 [ 31.225530] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.226170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.226987] ? __pfx_lock_acquire+0x10/0x10 [ 31.227529] ? __pfx_mmap_region+0x10/0x10 [ 31.228054] ? security_mmap_addr+0x7d/0xa0 [ 31.228583] ? get_unmapped_area+0x1f5/0x3f0 [ 31.229121] do_mmap+0x854/0xf00 [ 31.229557] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.230061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.230614] ksys_mmap_pgoff+0x3af/0x500 [ 31.231115] do_syscall_64+0x3f/0x90 [ 31.231594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232233] RIP: 0033:0x7fdc1715ed82 [ 31.232693] 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 [ 31.234827] RSP: 002b:00007ffde39b1798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.235747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc1715ed82 [ 31.236595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc16598000 [ 31.237441] RBP: 00007fdc16598000 R08: 0000000000000009 R09: 0000000000001000 [ 31.238300] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0e49a2ec0 [ 31.239149] R13: 00007ffde39b17b0 R14: 00007ffde39b17e0 R15: 00007ffde39b1b40 [ 31.239997] [ 31.240291] [ 31.240506] Allocated by task 212: [ 31.240933] kasan_save_stack+0x22/0x50 [ 31.241439] kasan_set_track+0x25/0x30 [ 31.241933] __kasan_slab_alloc+0x59/0x70 [ 31.242474] kmem_cache_alloc+0x16b/0x370 [ 31.242985] vm_area_dup+0x20/0x160 [ 31.243439] __split_vma+0x170/0x950 [ 31.243898] split_vma+0xc6/0x110 [ 31.244337] mprotect_fixup+0x8d2/0xb30 [ 31.244834] do_mprotect_pkey+0x87e/0xd40 [ 31.245362] __x64_sys_mprotect+0x78/0xc0 [ 31.245875] do_syscall_64+0x3f/0x90 [ 31.246355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246991] [ 31.247207] Freed by task 212: [ 31.247599] kasan_save_stack+0x22/0x50 [ 31.248095] kasan_set_track+0x25/0x30 [ 31.248582] kasan_save_free_info+0x2b/0x50 [ 31.249105] __kasan_slab_free+0x10a/0x190 [ 31.249635] kmem_cache_free+0x10d/0x4d0 [ 31.250147] rcu_core+0x8c8/0x2860 [ 31.250591] __do_softirq+0x1b7/0x7d4 [ 31.251063] [ 31.251277] Last potentially related work creation: [ 31.251857] kasan_save_stack+0x22/0x50 [ 31.252358] __kasan_record_aux_stack+0x8e/0xa0 [ 31.252932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253576] remove_vma+0x139/0x170 [ 31.254046] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254601] do_vmi_munmap+0x1f1/0x2b0 [ 31.255080] __vm_munmap+0x138/0x3a0 [ 31.255548] __x64_sys_munmap+0x59/0x80 [ 31.256039] do_syscall_64+0x3f/0x90 [ 31.256508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257140] [ 31.257355] The buggy address belongs to the object at ffff88800f2a40e8 [ 31.257355] which belongs to the cache vm_area_struct of size 168 [ 31.258814] The buggy address is located 88 bytes inside of [ 31.258814] freed 168-byte region [ffff88800f2a40e8, ffff88800f2a4190) [ 31.260221] [ 31.260436] The buggy address belongs to the physical page: [ 31.261085] page:00000000948c999b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a4 [ 31.262178] memcg:ffff888017756401 [ 31.262599] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.263239] page_type: 0xffffffff() [ 31.263683] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.264599] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017756401 [ 31.265501] page dumped because: kasan: bad access detected [ 31.266168] [ 31.266382] Memory state around the buggy address: [ 31.266958] ffff88800f2a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.267815] ffff88800f2a4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.268686] >ffff88800f2a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.269535] ^ [ 31.270181] ffff88800f2a4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.271033] ffff88800f2a4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.271880] ================================================================== [ 31.272838] Disabling lock debugging due to kernel taint [ 33.501828] BUG: Bad rss-counter state mm:00000000075b85b1 type:MM_FILEPAGES val:33 [ 33.502850] BUG: Bad rss-counter state mm:00000000075b85b1 type:MM_ANONPAGES val:22 [ 33.987535] BUG: Bad rss-counter state mm:00000000ef2bed6a type:MM_FILEPAGES val:33 [ 33.988532] BUG: Bad rss-counter state mm:00000000ef2bed6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3799' (ECDSA) to the list of known hosts. 2023/06/20 04:49:21 fuzzer started 2023/06/20 04:49:21 dialing manager at localhost:44161 2023/06/20 04:49:21 checking machine... 2023/06/20 04:49:21 checking revisions... [ 34.705977] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:49:21 testing simple program... [ 34.755823] cgroup: Unknown subsys name 'net' [ 34.794323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:49:20 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=00007f37c18e6650 CR3=000000000eac0000 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=39343a3430203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031323a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343437 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=0000000000000000 RCX=0000000000000d68 RDX=000000000000003d RSI=000055f8a5516f08 RDI=00007ffdcedbe569 RBP=00007ffdcedbe050 RSP=00007ffdcedbdb00 R8 =0000000000000000 R9 =00007ffdcedbe160 R10=00007ffdcedbe560 R11=0000000000000000 R12=00007ffdcedbe070 R13=000055f8a5516f08 R14=00007ffdcedbe1f0 R15=0000000000000009 RIP=00007fed165ebd80 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed15db7900 00000000 00000000 GS =0000 0000000000000000 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=00007fed15234750 CR3=000000000ec9c000 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=25252525252525252525252525252525 XMM01=00000000ff00ff000000000000000000 XMM02=00000000ff0000000000000000000000 XMM03=006c616e72756f6a2f646d6574737973 XMM04=bbfd9bb1b5e020bc00000000000ae988 XMM05=5e715186184952590000000000135cc8 XMM06=dfcdbad4f1609c370000000000134b28 XMM07=fb795ef6d65770560000000000125030 XMM08=4c5359530069253d595449524f495250 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000