syzkaller login: [ 30.755653] BUG: Bad rss-counter state mm:0000000066ce0058 type:MM_FILEPAGES val:33 [ 30.756637] BUG: Bad rss-counter state mm:0000000066ce0058 type:MM_ANONPAGES val:22 [ 30.916233] ================================================================== [ 30.917319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.918437] Read of size 8 at addr ffff88800d8c2310 by task sshd/221 [ 30.919336] [ 30.919738] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.920755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.921925] Call Trace: [ 30.922337] [ 30.922672] dump_stack_lvl+0x91/0xf0 [ 30.923228] print_report+0xcc/0x620 [ 30.923719] ? __virt_addr_valid+0x102/0x340 [ 30.924267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924890] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.925505] kasan_report+0xbe/0xf0 [ 30.925973] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.926589] vma_interval_tree_remove+0xc75/0xec0 [ 30.927179] vma_prepare+0xc54/0x11a0 [ 30.927654] __split_vma+0x5af/0x950 [ 30.928121] ? __pfx___split_vma+0x10/0x10 [ 30.928643] ? find_held_lock+0x2c/0x110 [ 30.929157] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.929711] ? lock_is_held_type+0x9f/0x120 [ 30.930246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.930842] ? mtree_range_walk+0x632/0x900 [ 30.931382] ? mas_walk+0x5c7/0x7c0 [ 30.931846] do_vmi_munmap+0x1f1/0x2b0 [ 30.932332] mmap_region+0x1f9/0x2660 [ 30.932809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.933316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.934014] ? __pfx_lock_acquire+0x10/0x10 [ 30.934564] ? __pfx_mmap_region+0x10/0x10 [ 30.935088] ? security_mmap_addr+0x7d/0xa0 [ 30.935617] ? get_unmapped_area+0x1f5/0x3f0 [ 30.936159] do_mmap+0x854/0xf00 [ 30.936594] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.937086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.937637] ksys_mmap_pgoff+0x3af/0x500 [ 30.938142] do_syscall_64+0x3f/0x90 [ 30.938645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.939290] RIP: 0033:0x7f1e52d48d82 [ 30.939743] 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 [ 30.941832] RSP: 002b:00007ffc2a628df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.942735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e52d48d82 [ 30.943581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e52182000 [ 30.944422] RBP: 00007f1e52182000 R08: 0000000000000009 R09: 0000000000001000 [ 30.945265] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562818a5fb20 [ 30.946102] R13: 00007ffc2a628e10 R14: 00007ffc2a628e40 R15: 00007ffc2a6291a0 [ 30.946973] [ 30.947268] [ 30.947480] Allocated by task 214: [ 30.947906] kasan_save_stack+0x22/0x50 [ 30.948406] kasan_set_track+0x25/0x30 [ 30.948905] __kasan_slab_alloc+0x59/0x70 [ 30.949428] kmem_cache_alloc+0x16b/0x370 [ 30.949951] vm_area_dup+0x20/0x160 [ 30.950405] __split_vma+0x170/0x950 [ 30.950871] split_vma+0xc6/0x110 [ 30.951314] mprotect_fixup+0x8d2/0xb30 [ 30.951831] do_mprotect_pkey+0x87e/0xd40 [ 30.952369] __x64_sys_mprotect+0x78/0xc0 [ 30.952913] do_syscall_64+0x3f/0x90 [ 30.953401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954054] [ 30.954299] Freed by task 211: [ 30.954701] kasan_save_stack+0x22/0x50 [ 30.955217] kasan_set_track+0x25/0x30 [ 30.955722] kasan_save_free_info+0x2b/0x50 [ 30.956271] __kasan_slab_free+0x10a/0x190 [ 30.956817] kmem_cache_free+0x10d/0x4d0 [ 30.957341] rcu_core+0x8c8/0x2860 [ 30.957793] __do_softirq+0x1b7/0x7d4 [ 30.958293] [ 30.958510] Last potentially related work creation: [ 30.959111] kasan_save_stack+0x22/0x50 [ 30.959631] __kasan_record_aux_stack+0x8e/0xa0 [ 30.960270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.960938] remove_vma+0x139/0x170 [ 30.961406] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.961977] do_vmi_munmap+0x1f1/0x2b0 [ 30.962495] __vm_munmap+0x138/0x3a0 [ 30.962974] __x64_sys_munmap+0x59/0x80 [ 30.963484] do_syscall_64+0x3f/0x90 [ 30.963971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.964623] [ 30.964844] Second to last potentially related work creation: [ 30.965554] kasan_save_stack+0x22/0x50 [ 30.966070] __kasan_record_aux_stack+0x8e/0xa0 [ 30.966665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.967329] remove_vma+0x139/0x170 [ 30.967796] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.968366] do_vmi_munmap+0x1f1/0x2b0 [ 30.968863] __vm_munmap+0x138/0x3a0 [ 30.969342] __x64_sys_munmap+0x59/0x80 [ 30.969851] do_syscall_64+0x3f/0x90 [ 30.970356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.971012] [ 30.971235] The buggy address belongs to the object at ffff88800d8c22b8 [ 30.971235] which belongs to the cache vm_area_struct of size 168 [ 30.972744] The buggy address is located 88 bytes inside of [ 30.972744] freed 168-byte region [ffff88800d8c22b8, ffff88800d8c2360) [ 30.974203] [ 30.974429] The buggy address belongs to the physical page: [ 30.975108] page:00000000455b76bd refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800d8c20e8 pfn:0xd8c2 [ 30.976374] memcg:ffff88800e08ca01 [ 30.976814] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.977482] page_type: 0xffffffff() [ 30.977951] raw: 0100000000000200 ffff88800879fc80 ffffea0000380a40 dead000000000002 [ 30.978904] raw: ffff88800d8c20e8 000000008011000d 00000001ffffffff ffff88800e08ca01 [ 30.979848] page dumped because: kasan: bad access detected [ 30.980527] [ 30.980746] Memory state around the buggy address: [ 30.981353] ffff88800d8c2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.982236] ffff88800d8c2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.983113] >ffff88800d8c2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.983985] ^ [ 30.984471] ffff88800d8c2380: fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb fb [ 30.985348] ffff88800d8c2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.986235] ================================================================== [ 30.987259] Disabling lock debugging due to kernel taint [ 32.826812] BUG: Bad rss-counter state mm:00000000a604be66 type:MM_FILEPAGES val:33 [ 32.827788] BUG: Bad rss-counter state mm:00000000a604be66 type:MM_ANONPAGES val:22 [ 33.385868] BUG: Bad rss-counter state mm:000000008e2aad8f type:MM_FILEPAGES val:33 [ 33.387026] BUG: Bad rss-counter state mm:000000008e2aad8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43836' (ECDSA) to the list of known hosts. 2023/06/20 03:23:28 fuzzer started 2023/06/20 03:23:29 dialing manager at localhost:44161 2023/06/20 03:23:29 checking machine... 2023/06/20 03:23:29 checking revisions... [ 34.014212] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:23:29 testing simple program... [ 34.057984] cgroup: Unknown subsys name 'net' [ 34.095554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:23:28 Registers: info registers vcpu 0 RAX=ffffffff8120674f RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7ff01 RSI=ffff888008d7ff18 RDI=ffff888008d7ff18 RBP=ffff888008d7f988 RSP=ffff888008d7f8b8 R8 =ffffffff860aefca R9 =ffff888008d7f970 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008d7f990 R13=ffff888008d7f978 R14=ffff888008d7ff20 R15=ffff888008d7f930 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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=00007f4d43f67650 CR3=000000000dd56000 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=33323a3330203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732038323a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383236 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f21adbe12c0 CR3=000000000e010000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000