syzkaller login: [ 37.095089] BUG: Bad rss-counter state mm:000000004af304c5 type:MM_FILEPAGES val:33 [ 37.096486] BUG: Bad rss-counter state mm:000000004af304c5 type:MM_ANONPAGES val:22 [ 37.220341] ================================================================== [ 37.221071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.221698] Read of size 8 at addr ffff88800d702968 by task sshd/220 [ 37.222254] [ 37.222413] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.223001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.223699] Call Trace: [ 37.223940] [ 37.224143] dump_stack_lvl+0x91/0xf0 [ 37.224490] print_report+0xcc/0x620 [ 37.225092] ? __virt_addr_valid+0x102/0x340 [ 37.225495] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.225911] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.226367] kasan_report+0xbe/0xf0 [ 37.226702] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.227129] vma_interval_tree_remove+0xc75/0xec0 [ 37.227567] vma_prepare+0xc54/0x11a0 [ 37.227906] __split_vma+0x5af/0x950 [ 37.228253] ? __pfx___split_vma+0x10/0x10 [ 37.228615] ? find_held_lock+0x2c/0x110 [ 37.229027] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.229411] ? lock_is_held_type+0x9f/0x120 [ 37.229772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.230191] ? mtree_range_walk+0x632/0x900 [ 37.230556] ? mas_walk+0x5c7/0x7c0 [ 37.230863] do_vmi_munmap+0x1f1/0x2b0 [ 37.231213] mmap_region+0x1f9/0x2660 [ 37.231549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.231884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.232373] ? __pfx_lock_acquire+0x10/0x10 [ 37.232772] ? __pfx_mmap_region+0x10/0x10 [ 37.233167] ? security_mmap_addr+0x7d/0xa0 [ 37.233535] ? get_unmapped_area+0x1f5/0x3f0 [ 37.233913] do_mmap+0x854/0xf00 [ 37.234257] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.234606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.234978] ksys_mmap_pgoff+0x3af/0x500 [ 37.235324] do_syscall_64+0x3f/0x90 [ 37.235646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.236119] RIP: 0033:0x7f8450c27d82 [ 37.236438] 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 [ 37.237942] RSP: 002b:00007ffca9536d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.238565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8450c27d82 [ 37.239143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8450061000 [ 37.239699] RBP: 00007f8450061000 R08: 0000000000000009 R09: 0000000000001000 [ 37.240302] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e84c1dec0 [ 37.240917] R13: 00007ffca9536d90 R14: 00007ffca9536dc0 R15: 00007ffca9537120 [ 37.241538] [ 37.241736] [ 37.241885] Allocated by task 213: [ 37.242178] kasan_save_stack+0x22/0x50 [ 37.242544] kasan_set_track+0x25/0x30 [ 37.242873] __kasan_slab_alloc+0x59/0x70 [ 37.243210] kmem_cache_alloc+0x16b/0x370 [ 37.243547] vm_area_dup+0x20/0x160 [ 37.243840] __split_vma+0x170/0x950 [ 37.244153] split_vma+0xc6/0x110 [ 37.244434] mprotect_fixup+0x8d2/0xb30 [ 37.244773] do_mprotect_pkey+0x87e/0xd40 [ 37.245098] __x64_sys_mprotect+0x78/0xc0 [ 37.245475] do_syscall_64+0x3f/0x90 [ 37.245803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.246242] [ 37.246400] Freed by task 220: [ 37.246669] kasan_save_stack+0x22/0x50 [ 37.246992] kasan_set_track+0x25/0x30 [ 37.247307] kasan_save_free_info+0x2b/0x50 [ 37.247640] __kasan_slab_free+0x10a/0x190 [ 37.247983] kmem_cache_free+0x10d/0x4d0 [ 37.248318] rcu_core+0x8c8/0x2860 [ 37.248607] __do_softirq+0x1b7/0x7d4 [ 37.248939] [ 37.249079] Last potentially related work creation: [ 37.249479] kasan_save_stack+0x22/0x50 [ 37.249828] __kasan_record_aux_stack+0x8e/0xa0 [ 37.250227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.250672] remove_vma+0x139/0x170 [ 37.250998] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.251388] do_vmi_munmap+0x1f1/0x2b0 [ 37.251724] __vm_munmap+0x138/0x3a0 [ 37.252046] __x64_sys_munmap+0x59/0x80 [ 37.252389] do_syscall_64+0x3f/0x90 [ 37.252738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.253166] [ 37.253316] Second to last potentially related work creation: [ 37.253786] kasan_save_stack+0x22/0x50 [ 37.254178] __kasan_record_aux_stack+0x8e/0xa0 [ 37.254573] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.255026] remove_vma+0x139/0x170 [ 37.255325] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.255701] do_vmi_munmap+0x1f1/0x2b0 [ 37.256038] mmap_region+0x1f9/0x2660 [ 37.256378] do_mmap+0x854/0xf00 [ 37.256687] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.257023] ksys_mmap_pgoff+0x7d/0x500 [ 37.257400] do_syscall_64+0x3f/0x90 [ 37.257724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.258199] [ 37.258348] The buggy address belongs to the object at ffff88800d702910 [ 37.258348] which belongs to the cache vm_area_struct of size 168 [ 37.259368] The buggy address is located 88 bytes inside of [ 37.259368] freed 168-byte region [ffff88800d702910, ffff88800d7029b8) [ 37.260325] [ 37.260469] The buggy address belongs to the physical page: [ 37.260963] page:000000007b7f9d8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd702 [ 37.261674] memcg:ffff88800f042f01 [ 37.261934] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.262360] page_type: 0xffffffff() [ 37.262659] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.263274] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f042f01 [ 37.263893] page dumped because: kasan: bad access detected [ 37.264355] [ 37.264502] Memory state around the buggy address: [ 37.264921] ffff88800d702800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.265523] ffff88800d702880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.266091] >ffff88800d702900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.266717] ^ [ 37.267237] ffff88800d702980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 37.267800] ffff88800d702a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.268446] ================================================================== [ 37.269471] Disabling lock debugging due to kernel taint [ 38.968253] BUG: Bad rss-counter state mm:00000000355d16e7 type:MM_FILEPAGES val:33 [ 38.969026] BUG: Bad rss-counter state mm:00000000355d16e7 type:MM_ANONPAGES val:22 [ 39.362270] BUG: Bad rss-counter state mm:00000000250525af type:MM_FILEPAGES val:33 [ 39.362932] BUG: Bad rss-counter state mm:00000000250525af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22796' (ECDSA) to the list of known hosts. 2023/06/20 08:53:21 fuzzer started 2023/06/20 08:53:21 dialing manager at localhost:44161 2023/06/20 08:53:21 checking machine... 2023/06/20 08:53:21 checking revisions... [ 39.936746] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:53:21 testing simple program... [ 39.975309] cgroup: Unknown subsys name 'net' [ 40.023834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:53:19 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=00007f03aa3fad00 CR3=0000000013610000 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=a10f5c746b4c729b0b42bf581152bfeb XMM02=2c67c8bc2e329bc3000000000011cb68 XMM03=fb795ef6d657705600000000001238b8 XMM04=5ebc8575060b89b700000000000ae988 XMM05=19e9129bd510f2350000000000134478 XMM06=cd2245f13825a6aa0000000000133650 XMM07=e042d86d42eb936e0000000000123b38 XMM08=09f19a832fa62272000000000011cbc8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab4235 RDI=ffff88801a0e1f34 RBP=0000000000000000 RSP=ffff888017daf500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c1e00000c1e R12=0000000000000000 R13=0000000000000025 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007f7e0d548900 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=00007f7e0daff618 CR3=000000000d5bc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000