syzkaller login: [ 33.610266] BUG: Bad rss-counter state mm:000000008ef505fb type:MM_FILEPAGES val:33 [ 33.611448] BUG: Bad rss-counter state mm:000000008ef505fb type:MM_ANONPAGES val:22 [ 33.779288] ================================================================== [ 33.780270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.781236] Read of size 8 at addr ffff88800e526968 by task sshd/220 [ 33.782135] [ 33.782357] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.783242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.784234] Call Trace: [ 33.784571] [ 33.784862] dump_stack_lvl+0x91/0xf0 [ 33.785391] print_report+0xcc/0x620 [ 33.785885] ? __virt_addr_valid+0x102/0x340 [ 33.786457] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.787080] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.787708] kasan_report+0xbe/0xf0 [ 33.788189] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.788834] vma_interval_tree_remove+0xc75/0xec0 [ 33.789469] vma_prepare+0xc54/0x11a0 [ 33.789968] __split_vma+0x5af/0x950 [ 33.790448] ? __pfx___split_vma+0x10/0x10 [ 33.790986] ? find_held_lock+0x2c/0x110 [ 33.791529] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.792123] ? lock_is_held_type+0x9f/0x120 [ 33.792671] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.793306] ? mtree_range_walk+0x632/0x900 [ 33.793874] ? mas_walk+0x5c7/0x7c0 [ 33.794365] do_vmi_munmap+0x1f1/0x2b0 [ 33.794871] mmap_region+0x1f9/0x2660 [ 33.795372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.795893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.796629] ? __pfx_lock_acquire+0x10/0x10 [ 33.797197] ? __pfx_mmap_region+0x10/0x10 [ 33.797739] ? security_mmap_addr+0x7d/0xa0 [ 33.798281] ? get_unmapped_area+0x1f5/0x3f0 [ 33.798837] do_mmap+0x854/0xf00 [ 33.799282] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.799788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.800367] ksys_mmap_pgoff+0x3af/0x500 [ 33.800879] do_syscall_64+0x3f/0x90 [ 33.801384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.802040] RIP: 0033:0x7f6854f76d82 [ 33.802509] 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 [ 33.804644] RSP: 002b:00007ffec499b7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.805565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6854f76d82 [ 33.806425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68543b0000 [ 33.807276] RBP: 00007f68543b0000 R08: 0000000000000009 R09: 0000000000001000 [ 33.808144] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fcff26ec0 [ 33.809008] R13: 00007ffec499b800 R14: 00007ffec499b830 R15: 00007ffec499bb90 [ 33.809898] [ 33.810199] [ 33.810418] Allocated by task 213: [ 33.810862] kasan_save_stack+0x22/0x50 [ 33.811382] kasan_set_track+0x25/0x30 [ 33.811897] __kasan_slab_alloc+0x59/0x70 [ 33.812426] kmem_cache_alloc+0x16b/0x370 [ 33.812952] vm_area_dup+0x20/0x160 [ 33.813428] __split_vma+0x170/0x950 [ 33.813902] split_vma+0xc6/0x110 [ 33.814365] mprotect_fixup+0x8d2/0xb30 [ 33.814893] do_mprotect_pkey+0x87e/0xd40 [ 33.815418] __x64_sys_mprotect+0x78/0xc0 [ 33.815951] do_syscall_64+0x3f/0x90 [ 33.816439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.817095] [ 33.817336] Freed by task 213: [ 33.817734] kasan_save_stack+0x22/0x50 [ 33.818253] kasan_set_track+0x25/0x30 [ 33.818756] kasan_save_free_info+0x2b/0x50 [ 33.819310] __kasan_slab_free+0x10a/0x190 [ 33.819852] kmem_cache_free+0x10d/0x4d0 [ 33.820367] rcu_core+0x8c8/0x2860 [ 33.820816] __do_softirq+0x1b7/0x7d4 [ 33.821317] [ 33.821547] Last potentially related work creation: [ 33.822146] kasan_save_stack+0x22/0x50 [ 33.822658] __kasan_record_aux_stack+0x8e/0xa0 [ 33.823245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.823895] remove_vma+0x139/0x170 [ 33.824361] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.824927] do_vmi_munmap+0x1f1/0x2b0 [ 33.825439] __vm_munmap+0x138/0x3a0 [ 33.825919] __x64_sys_munmap+0x59/0x80 [ 33.826423] do_syscall_64+0x3f/0x90 [ 33.826903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.827567] [ 33.827789] Second to last potentially related work creation: [ 33.828480] kasan_save_stack+0x22/0x50 [ 33.828989] __kasan_record_aux_stack+0x8e/0xa0 [ 33.829607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.830265] remove_vma+0x139/0x170 [ 33.830731] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.831336] do_vmi_munmap+0x1f1/0x2b0 [ 33.831818] mmap_region+0x1f9/0x2660 [ 33.832305] do_mmap+0x854/0xf00 [ 33.832763] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.833252] ksys_mmap_pgoff+0x7d/0x500 [ 33.833745] do_syscall_64+0x3f/0x90 [ 33.834220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.834852] [ 33.835072] The buggy address belongs to the object at ffff88800e526910 [ 33.835072] which belongs to the cache vm_area_struct of size 168 [ 33.836534] The buggy address is located 88 bytes inside of [ 33.836534] freed 168-byte region [ffff88800e526910, ffff88800e5269b8) [ 33.837945] [ 33.838158] The buggy address belongs to the physical page: [ 33.838836] page:00000000207bf79f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe526 [ 33.839932] memcg:ffff88800e221d01 [ 33.840365] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.841017] page_type: 0xffffffff() [ 33.841498] raw: 0100000000000200 ffff88800879fc80 ffffea0000393980 dead000000000002 [ 33.842431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e221d01 [ 33.843346] page dumped because: kasan: bad access detected [ 33.844016] [ 33.844239] Memory state around the buggy address: [ 33.844852] ffff88800e526800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.845724] ffff88800e526880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.846583] >ffff88800e526900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.847425] ^ [ 33.848203] ffff88800e526980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.849076] ffff88800e526a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.849946] ================================================================== [ 33.850953] Disabling lock debugging due to kernel taint [ 35.818016] BUG: Bad rss-counter state mm:00000000ebea7558 type:MM_FILEPAGES val:33 [ 35.819273] BUG: Bad rss-counter state mm:00000000ebea7558 type:MM_ANONPAGES val:22 [ 36.277966] BUG: Bad rss-counter state mm:00000000acd48ad2 type:MM_FILEPAGES val:33 [ 36.279199] BUG: Bad rss-counter state mm:00000000acd48ad2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60345' (ECDSA) to the list of known hosts. 2023/06/20 05:28:12 fuzzer started 2023/06/20 05:28:13 dialing manager at localhost:44161 2023/06/20 05:28:13 checking machine... 2023/06/20 05:28:13 checking revisions... [ 37.003725] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:28:13 testing simple program... [ 37.050439] cgroup: Unknown subsys name 'net' [ 37.111210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:28:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888010297d68 RSI=ffffffff81f58db7 RDI=ffff888008e1c000 RBP=ffff88800b906800 RSP=ffff888010297a78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff888008e1c0d8 R13=0000000000000000 R14=ffff88800b906808 R15=dffffc0000000000 RIP=ffffffff81f58dc1 RFL=00000293 [--S-A-C] 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 00007faa36cd1900 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=00007ffd5d59a000 CR3=00000000168e8000 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=00000000000000000000000000000000 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 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=0000000000000001 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=00007f3083306ea0 CR3=0000000015c7a000 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=2032313a38323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a38323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000