syzkaller login: [ 31.058671] BUG: Bad rss-counter state mm:000000001f1d8ff6 type:MM_FILEPAGES val:33 [ 31.059763] BUG: Bad rss-counter state mm:000000001f1d8ff6 type:MM_ANONPAGES val:22 [ 31.229987] ================================================================== [ 31.231066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.232041] Read of size 8 at addr ffff8880146f1310 by task sshd/221 [ 31.232832] [ 31.233085] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.234000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.234985] Call Trace: [ 31.235316] [ 31.235608] dump_stack_lvl+0x91/0xf0 [ 31.236118] print_report+0xcc/0x620 [ 31.236613] ? __virt_addr_valid+0x102/0x340 [ 31.237221] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238552] kasan_report+0xbe/0xf0 [ 31.239068] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.239749] vma_interval_tree_remove+0xc75/0xec0 [ 31.240404] vma_prepare+0xc54/0x11a0 [ 31.240950] __split_vma+0x5af/0x950 [ 31.241471] ? __pfx___split_vma+0x10/0x10 [ 31.242046] ? find_held_lock+0x2c/0x110 [ 31.242611] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.243242] ? lock_is_held_type+0x9f/0x120 [ 31.243830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.244485] ? mtree_range_walk+0x632/0x900 [ 31.245109] ? mas_walk+0x5c7/0x7c0 [ 31.245631] do_vmi_munmap+0x1f1/0x2b0 [ 31.246166] mmap_region+0x1f9/0x2660 [ 31.246774] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.247394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.248231] ? __pfx_lock_acquire+0x10/0x10 [ 31.248857] ? __pfx_mmap_region+0x10/0x10 [ 31.249510] ? security_mmap_addr+0x7d/0xa0 [ 31.250145] ? get_unmapped_area+0x1f5/0x3f0 [ 31.250799] do_mmap+0x854/0xf00 [ 31.251303] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.251873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.252542] ksys_mmap_pgoff+0x3af/0x500 [ 31.253157] do_syscall_64+0x3f/0x90 [ 31.253725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254490] RIP: 0033:0x7fcdefa94d82 [ 31.255029] 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 [ 31.257573] RSP: 002b:00007ffeb04b74b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.258645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdefa94d82 [ 31.259618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdeeece000 [ 31.260618] RBP: 00007fcdeeece000 R08: 0000000000000009 R09: 0000000000001000 [ 31.261623] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644f728eec0 [ 31.262609] R13: 00007ffeb04b74d0 R14: 00007ffeb04b7500 R15: 00007ffeb04b7860 [ 31.263599] [ 31.263950] [ 31.264198] Allocated by task 214: [ 31.264701] kasan_save_stack+0x22/0x50 [ 31.265286] kasan_set_track+0x25/0x30 [ 31.265862] __kasan_slab_alloc+0x59/0x70 [ 31.266478] kmem_cache_alloc+0x16b/0x370 [ 31.267090] vm_area_dup+0x20/0x160 [ 31.267615] __split_vma+0x170/0x950 [ 31.268152] split_vma+0xc6/0x110 [ 31.268660] mprotect_fixup+0x8d2/0xb30 [ 31.269267] do_mprotect_pkey+0x87e/0xd40 [ 31.269886] __x64_sys_mprotect+0x78/0xc0 [ 31.270492] do_syscall_64+0x3f/0x90 [ 31.271050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271895] [ 31.272144] Freed by task 214: [ 31.272604] kasan_save_stack+0x22/0x50 [ 31.273200] kasan_set_track+0x25/0x30 [ 31.273774] kasan_save_free_info+0x2b/0x50 [ 31.274399] __kasan_slab_free+0x10a/0x190 [ 31.275014] kmem_cache_free+0x10d/0x4d0 [ 31.275609] rcu_core+0x8c8/0x2860 [ 31.276120] __do_softirq+0x1b7/0x7d4 [ 31.276661] [ 31.276907] Last potentially related work creation: [ 31.277585] kasan_save_stack+0x22/0x50 [ 31.278162] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.279573] remove_vma+0x139/0x170 [ 31.280096] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.280725] do_vmi_munmap+0x1f1/0x2b0 [ 31.281300] __vm_munmap+0x138/0x3a0 [ 31.281840] __x64_sys_munmap+0x59/0x80 [ 31.282413] do_syscall_64+0x3f/0x90 [ 31.282951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283698] [ 31.283947] Second to last potentially related work creation: [ 31.284747] kasan_save_stack+0x22/0x50 [ 31.285322] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.286708] remove_vma+0x139/0x170 [ 31.287240] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.287883] do_vmi_munmap+0x1f1/0x2b0 [ 31.288438] mmap_region+0x1f9/0x2660 [ 31.289002] do_mmap+0x854/0xf00 [ 31.289489] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.290027] ksys_mmap_pgoff+0x3af/0x500 [ 31.290605] do_syscall_64+0x3f/0x90 [ 31.291143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.291874] [ 31.292123] The buggy address belongs to the object at ffff8880146f12b8 [ 31.292123] which belongs to the cache vm_area_struct of size 168 [ 31.293787] The buggy address is located 88 bytes inside of [ 31.293787] freed 168-byte region [ffff8880146f12b8, ffff8880146f1360) [ 31.295393] [ 31.295640] The buggy address belongs to the physical page: [ 31.296412] page:0000000029f72909 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146f1 [ 31.297677] memcg:ffff8880146f8601 [ 31.298160] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298915] page_type: 0xffffffff() [ 31.299485] raw: 0100000000000200 ffff8880087a0c80 ffffea0000661d40 dead000000000002 [ 31.300582] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146f8601 [ 31.301558] page dumped because: kasan: bad access detected [ 31.302277] [ 31.302505] Memory state around the buggy address: [ 31.303147] ffff8880146f1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.304065] ffff8880146f1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.305006] >ffff8880146f1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.305932] ^ [ 31.306414] ffff8880146f1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.307343] ffff8880146f1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.308274] ================================================================== [ 31.309381] Disabling lock debugging due to kernel taint [ 33.628290] BUG: Bad rss-counter state mm:0000000057ca9000 type:MM_FILEPAGES val:33 [ 33.629894] BUG: Bad rss-counter state mm:0000000057ca9000 type:MM_ANONPAGES val:22 [ 34.089996] BUG: Bad rss-counter state mm:00000000c6f34434 type:MM_FILEPAGES val:33 [ 34.091096] BUG: Bad rss-counter state mm:00000000c6f34434 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43009' (ECDSA) to the list of known hosts. 2023/06/21 04:47:08 fuzzer started 2023/06/21 04:47:08 dialing manager at localhost:36067 2023/06/21 04:47:08 checking machine... 2023/06/21 04:47:08 checking revisions... [ 34.854488] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:47:08 testing simple program... [ 34.907538] cgroup: Unknown subsys name 'net' [ 34.964701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11002021e7c RDX=dffffc0000000000 RSI=ffffffff8180c705 RDI=ffff88801010f388 RBP=ffff88801010f3e0 RSP=ffff88801010f318 R8 =ffffffff86138e90 R9 =ffff88801010f3c8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801010f3e8 R13=ffff88801010f3d0 R14=ffff88801010f3c9 R15=ffff88801010f388 RIP=ffffffff81130706 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 00007f966614f900 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=00007f9666706618 CR3=00000000199a8000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd5947ff3f0 CR3=000000000c52c000 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=669578fa229e28a3fa4b90ecf3078f5e XMM02=000000000011d500eff9b2d0a8fce9cb XMM03=000000000011d5d02c67c8bc2e329bc3 XMM04=32fd2958ea75cb6a00000000000ae988 XMM05=28ebccb31352afdc0000000000133d10 XMM06=c291bd5c70af25b90000000000132db0 XMM07=e042d86d42eb936e0000000000121f90 XMM08=ac60697ba4767df4000000000011d5d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000