syzkaller login: [ 34.717272] BUG: Bad rss-counter state mm:00000000d2b938da type:MM_FILEPAGES val:33 [ 34.718293] BUG: Bad rss-counter state mm:00000000d2b938da type:MM_ANONPAGES val:22 [ 34.885404] ================================================================== [ 34.886348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.887304] Read of size 8 at addr ffff88800eaab798 by task sshd/220 [ 34.888098] [ 34.888316] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.889273] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.890262] Call Trace: [ 34.890589] [ 34.890876] dump_stack_lvl+0x91/0xf0 [ 34.891365] print_report+0xcc/0x620 [ 34.891885] ? __virt_addr_valid+0x102/0x340 [ 34.892441] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.893060] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.893683] kasan_report+0xbe/0xf0 [ 34.894163] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.894788] vma_interval_tree_remove+0xc75/0xec0 [ 34.895387] vma_prepare+0xc54/0x11a0 [ 34.895881] __split_vma+0x5af/0x950 [ 34.896364] ? __pfx___split_vma+0x10/0x10 [ 34.896897] ? find_held_lock+0x2c/0x110 [ 34.897420] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.897994] ? lock_is_held_type+0x9f/0x120 [ 34.898539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.899158] ? mtree_range_walk+0x632/0x900 [ 34.899731] ? mas_walk+0x5c7/0x7c0 [ 34.900213] do_vmi_munmap+0x1f1/0x2b0 [ 34.900703] mmap_region+0x1f9/0x2660 [ 34.901187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.901696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.902423] ? __pfx_lock_acquire+0x10/0x10 [ 34.902964] ? __pfx_mmap_region+0x10/0x10 [ 34.903511] ? security_mmap_addr+0x7d/0xa0 [ 34.904062] ? get_unmapped_area+0x1f5/0x3f0 [ 34.904623] do_mmap+0x854/0xf00 [ 34.905063] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.905560] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.906120] ksys_mmap_pgoff+0x3af/0x500 [ 34.906625] do_syscall_64+0x3f/0x90 [ 34.907104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.907778] RIP: 0033:0x7f72d7ef3d82 [ 34.908243] 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 [ 34.910376] RSP: 002b:00007ffda0ed04b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.911286] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72d7ef3d82 [ 34.912190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72d732d000 [ 34.913043] RBP: 00007f72d732d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.913893] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638b31b3ec0 [ 34.914741] R13: 00007ffda0ed04d0 R14: 00007ffda0ed0500 R15: 00007ffda0ed0860 [ 34.915613] [ 34.915921] [ 34.916175] Allocated by task 213: [ 34.916617] kasan_save_stack+0x22/0x50 [ 34.917121] kasan_set_track+0x25/0x30 [ 34.917624] __kasan_slab_alloc+0x59/0x70 [ 34.918161] kmem_cache_alloc+0x16b/0x370 [ 34.918681] vm_area_dup+0x20/0x160 [ 34.919149] __split_vma+0x170/0x950 [ 34.919630] split_vma+0xc6/0x110 [ 34.920079] mprotect_fixup+0x8d2/0xb30 [ 34.920579] do_mprotect_pkey+0x87e/0xd40 [ 34.921109] __x64_sys_mprotect+0x78/0xc0 [ 34.921633] do_syscall_64+0x3f/0x90 [ 34.922110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.922770] [ 34.922988] Freed by task 213: [ 34.923394] kasan_save_stack+0x22/0x50 [ 34.923910] kasan_set_track+0x25/0x30 [ 34.924410] kasan_save_free_info+0x2b/0x50 [ 34.924954] __kasan_slab_free+0x10a/0x190 [ 34.925500] kmem_cache_free+0x10d/0x4d0 [ 34.926016] rcu_core+0x8c8/0x2860 [ 34.926462] __do_softirq+0x1b7/0x7d4 [ 34.926946] [ 34.927164] Last potentially related work creation: [ 34.927774] kasan_save_stack+0x22/0x50 [ 34.928280] __kasan_record_aux_stack+0x8e/0xa0 [ 34.928854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.929505] remove_vma+0x139/0x170 [ 34.929965] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.930527] do_vmi_munmap+0x1f1/0x2b0 [ 34.931016] __vm_munmap+0x138/0x3a0 [ 34.931491] __x64_sys_munmap+0x59/0x80 [ 34.932008] do_syscall_64+0x3f/0x90 [ 34.932484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.933125] [ 34.933346] Second to last potentially related work creation: [ 34.934041] kasan_save_stack+0x22/0x50 [ 34.934553] __kasan_record_aux_stack+0x8e/0xa0 [ 34.935134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.935795] remove_vma+0x139/0x170 [ 34.936255] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.936823] do_vmi_munmap+0x1f1/0x2b0 [ 34.937315] mmap_region+0x1f9/0x2660 [ 34.937791] do_mmap+0x854/0xf00 [ 34.938234] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.938730] ksys_mmap_pgoff+0x3af/0x500 [ 34.939232] do_syscall_64+0x3f/0x90 [ 34.939728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.940376] [ 34.940599] The buggy address belongs to the object at ffff88800eaab740 [ 34.940599] which belongs to the cache vm_area_struct of size 168 [ 34.942083] The buggy address is located 88 bytes inside of [ 34.942083] freed 168-byte region [ffff88800eaab740, ffff88800eaab7e8) [ 34.943520] [ 34.943742] The buggy address belongs to the physical page: [ 34.944417] page:00000000e0ae410f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaab [ 34.945519] memcg:ffff88800e956b01 [ 34.945949] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.946659] page_type: 0xffffffff() [ 34.947117] raw: 0100000000000200 ffff88800879fc80 ffffea0000381400 dead000000000007 [ 34.948057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e956b01 [ 34.948969] page dumped because: kasan: bad access detected [ 34.949642] [ 34.949857] Memory state around the buggy address: [ 34.950448] ffff88800eaab680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.951308] ffff88800eaab700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.952174] >ffff88800eaab780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.953069] ^ [ 34.953573] ffff88800eaab800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.954424] ffff88800eaab880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.955274] ================================================================== [ 34.956371] Disabling lock debugging due to kernel taint [ 37.472009] BUG: Bad rss-counter state mm:000000003e2442f8 type:MM_FILEPAGES val:33 [ 37.473056] BUG: Bad rss-counter state mm:000000003e2442f8 type:MM_ANONPAGES val:22 [ 37.982869] BUG: Bad rss-counter state mm:00000000b4da79cc type:MM_FILEPAGES val:33 [ 37.984068] BUG: Bad rss-counter state mm:00000000b4da79cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52692' (ECDSA) to the list of known hosts. 2023/06/19 17:02:48 fuzzer started 2023/06/19 17:02:48 dialing manager at localhost:44161 2023/06/19 17:02:48 checking machine... 2023/06/19 17:02:48 checking revisions... [ 38.696089] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:02:48 testing simple program... [ 38.736914] cgroup: Unknown subsys name 'net' [ 38.784397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:02:44 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=00007f0bf6b70ea0 CR3=00000000147b8000 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=2037343a32303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880101675c8 RCX=0000000000000001 RDX=1ffff1100d9e1351 RSI=ffff8880101675b8 RDI=ffff88806cf09a88 RBP=ffff888010160000 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff8880101675b8 R15=ffff88806cf09a78 RIP=ffffffff81131cac 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 00007f46ebe5f900 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=00007ffcacea1000 CR3=000000000dd64000 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=563412feff00545000000000000080fe 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