syzkaller login: [ 28.658285] BUG: Bad rss-counter state mm:00000000af9b327f type:MM_FILEPAGES val:33 [ 28.659598] BUG: Bad rss-counter state mm:00000000af9b327f type:MM_ANONPAGES val:22 [ 28.824769] ================================================================== [ 28.825659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.826534] Read of size 8 at addr ffff88800ca053f8 by task sshd/221 [ 28.827258] [ 28.827465] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.828423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.829340] Call Trace: [ 28.829678] [ 28.829950] dump_stack_lvl+0x91/0xf0 [ 28.830412] print_report+0xcc/0x620 [ 28.830867] ? __virt_addr_valid+0x102/0x340 [ 28.831383] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.831965] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.832541] kasan_report+0xbe/0xf0 [ 28.832991] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.833587] vma_interval_tree_remove+0xc75/0xec0 [ 28.834213] vma_prepare+0xc54/0x11a0 [ 28.834775] __split_vma+0x5af/0x950 [ 28.835332] ? __pfx___split_vma+0x10/0x10 [ 28.835954] ? find_held_lock+0x2c/0x110 [ 28.836565] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.837225] ? lock_is_held_type+0x9f/0x120 [ 28.837879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.838597] ? mtree_range_walk+0x632/0x900 [ 28.839246] ? mas_walk+0x5c7/0x7c0 [ 28.839801] do_vmi_munmap+0x1f1/0x2b0 [ 28.840381] mmap_region+0x1f9/0x2660 [ 28.840949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.841572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.842418] ? __pfx_lock_acquire+0x10/0x10 [ 28.843044] ? __pfx_mmap_region+0x10/0x10 [ 28.843663] ? security_mmap_addr+0x7d/0xa0 [ 28.844287] ? get_unmapped_area+0x1f5/0x3f0 [ 28.844931] do_mmap+0x854/0xf00 [ 28.845443] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.846031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.846686] ksys_mmap_pgoff+0x3af/0x500 [ 28.847277] do_syscall_64+0x3f/0x90 [ 28.847835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.848592] RIP: 0033:0x7fe513109d82 [ 28.849128] 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 [ 28.851657] RSP: 002b:00007ffc2ad2cc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.852725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe513109d82 [ 28.853733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe512543000 [ 28.854729] RBP: 00007fe512543000 R08: 0000000000000009 R09: 0000000000001000 [ 28.855727] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b18023ec0 [ 28.856718] R13: 00007ffc2ad2cc50 R14: 00007ffc2ad2cc80 R15: 00007ffc2ad2cfe0 [ 28.857739] [ 28.858082] [ 28.858333] Allocated by task 214: [ 28.858837] kasan_save_stack+0x22/0x50 [ 28.859428] kasan_set_track+0x25/0x30 [ 28.860009] __kasan_slab_alloc+0x59/0x70 [ 28.860624] kmem_cache_alloc+0x16b/0x370 [ 28.861231] vm_area_dup+0x20/0x160 [ 28.861782] __split_vma+0x170/0x950 [ 28.862330] split_vma+0xc6/0x110 [ 28.862844] mprotect_fixup+0x8d2/0xb30 [ 28.863431] do_mprotect_pkey+0x87e/0xd40 [ 28.864040] __x64_sys_mprotect+0x78/0xc0 [ 28.864649] do_syscall_64+0x3f/0x90 [ 28.865203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.865965] [ 28.866215] Freed by task 214: [ 28.866675] kasan_save_stack+0x22/0x50 [ 28.867264] kasan_set_track+0x25/0x30 [ 28.867844] kasan_save_free_info+0x2b/0x50 [ 28.868471] __kasan_slab_free+0x10a/0x190 [ 28.869097] kmem_cache_free+0x10d/0x4d0 [ 28.869747] rcu_core+0x8c8/0x2860 [ 28.870269] __do_softirq+0x1b7/0x7d4 [ 28.870825] [ 28.871075] Last potentially related work creation: [ 28.871764] kasan_save_stack+0x22/0x50 [ 28.872357] __kasan_record_aux_stack+0x8e/0xa0 [ 28.873027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.873791] remove_vma+0x139/0x170 [ 28.874322] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.874975] do_vmi_munmap+0x1f1/0x2b0 [ 28.875539] __vm_munmap+0x138/0x3a0 [ 28.876085] __x64_sys_munmap+0x59/0x80 [ 28.876664] do_syscall_64+0x3f/0x90 [ 28.877221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.877982] [ 28.878237] Second to last potentially related work creation: [ 28.879044] kasan_save_stack+0x22/0x50 [ 28.879629] __kasan_record_aux_stack+0x8e/0xa0 [ 28.880303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.881057] remove_vma+0x139/0x170 [ 28.881603] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.882260] do_vmi_munmap+0x1f1/0x2b0 [ 28.882831] mmap_region+0x1f9/0x2660 [ 28.883391] do_mmap+0x854/0xf00 [ 28.883894] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.884460] ksys_mmap_pgoff+0x3af/0x500 [ 28.885050] do_syscall_64+0x3f/0x90 [ 28.885611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.886370] [ 28.886619] The buggy address belongs to the object at ffff88800ca053a0 [ 28.886619] which belongs to the cache vm_area_struct of size 168 [ 28.888343] The buggy address is located 88 bytes inside of [ 28.888343] freed 168-byte region [ffff88800ca053a0, ffff88800ca05448) [ 28.890010] [ 28.890262] The buggy address belongs to the physical page: [ 28.891036] page:00000000d103649d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca05 [ 28.892311] memcg:ffff88800e4cb601 [ 28.892809] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.893637] page_type: 0xffffffff() [ 28.894164] raw: 0100000000000200 ffff8880087a0c80 ffffea00003719c0 dead000000000009 [ 28.895246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4cb601 [ 28.896314] page dumped because: kasan: bad access detected [ 28.897095] [ 28.897345] Memory state around the buggy address: [ 28.898038] ffff88800ca05280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.899046] ffff88800ca05300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.900054] >ffff88800ca05380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.901057] ^ [ 28.902063] ffff88800ca05400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.903071] ffff88800ca05480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.904069] ================================================================== [ 28.905250] Disabling lock debugging due to kernel taint [ 31.699013] BUG: Bad rss-counter state mm:00000000a126a67e type:MM_FILEPAGES val:33 [ 31.700490] BUG: Bad rss-counter state mm:00000000a126a67e type:MM_ANONPAGES val:22 [ 32.179061] BUG: Bad rss-counter state mm:000000005b899364 type:MM_FILEPAGES val:33 [ 32.180073] BUG: Bad rss-counter state mm:000000005b899364 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42203' (ECDSA) to the list of known hosts. 2023/06/20 11:42:12 fuzzer started 2023/06/20 11:42:12 dialing manager at localhost:36067 2023/06/20 11:42:13 checking machine... 2023/06/20 11:42:13 checking revisions... [ 32.866005] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:42:13 testing simple program... [ 32.915565] cgroup: Unknown subsys name 'net' [ 32.964124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:12 Registers: info registers vcpu 0 RAX=ffffed1002c52e57 RBX=ffffed1002c52e58 RCX=ffffffff8196bfd5 RDX=ffffed1002c52e58 RSI=0000000000000008 RDI=ffff8880162972b8 RBP=ffffed1002c52e57 RSP=ffff88800f707a08 R8 =0000000000000000 R9 =ffffed1002c52e57 R10=ffff8880162972bf R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff8180f189 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc6c654f900 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=00007fc6c594e4d0 CR3=000000000c71a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fa51887486a638cd00000000000ae988 XMM05=66a3aad04ced9e230000000000134438 XMM06=a005a0f9f49c664a00000000001334e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c705 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016a07801 RSI=ffff888016a078f0 RDI=ffff888016a078f0 RBP=ffff888016a07600 RSP=ffff888016a07538 R8 =ffffffff86138e90 R9 =ffff888016a075e8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888016a07608 R13=ffff888016a075f0 R14=ffff888016a078f8 R15=ffff888016a075a8 RIP=ffffffff81131041 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 00007fcf65dae900 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=00007fff8eb1e000 CR3=000000000d7d4000 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=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