syzkaller login: [ 34.618377] BUG: Bad rss-counter state mm:00000000f3fa336d type:MM_FILEPAGES val:33 [ 34.619834] BUG: Bad rss-counter state mm:00000000f3fa336d type:MM_ANONPAGES val:22 [ 34.766494] ================================================================== [ 34.767447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.768413] Read of size 8 at addr ffff88801bceea50 by task sshd/220 [ 34.769300] [ 34.769528] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.770428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.771448] Call Trace: [ 34.771778] [ 34.772075] dump_stack_lvl+0x91/0xf0 [ 34.772582] print_report+0xcc/0x620 [ 34.773082] ? __virt_addr_valid+0x102/0x340 [ 34.773650] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.774310] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.774992] kasan_report+0xbe/0xf0 [ 34.775488] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.776129] vma_interval_tree_remove+0xc75/0xec0 [ 34.776757] vma_prepare+0xc54/0x11a0 [ 34.777253] __split_vma+0x5af/0x950 [ 34.777744] ? __pfx___split_vma+0x10/0x10 [ 34.778303] ? find_held_lock+0x2c/0x110 [ 34.778847] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.779435] ? lock_is_held_type+0x9f/0x120 [ 34.779991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.780622] ? mtree_range_walk+0x632/0x900 [ 34.781188] ? mas_walk+0x5c7/0x7c0 [ 34.781681] do_vmi_munmap+0x1f1/0x2b0 [ 34.782200] mmap_region+0x1f9/0x2660 [ 34.782695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.783226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.783962] ? __pfx_lock_acquire+0x10/0x10 [ 34.784509] ? __pfx_mmap_region+0x10/0x10 [ 34.785067] ? security_mmap_addr+0x7d/0xa0 [ 34.785619] ? get_unmapped_area+0x1f5/0x3f0 [ 34.786198] do_mmap+0x854/0xf00 [ 34.786661] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.787174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.787753] ksys_mmap_pgoff+0x3af/0x500 [ 34.788283] do_syscall_64+0x3f/0x90 [ 34.788778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.789448] RIP: 0033:0x7fde89f52d82 [ 34.789926] 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 [ 34.792148] RSP: 002b:00007ffd4c23f3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.793096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde89f52d82 [ 34.793990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde8938c000 [ 34.794868] RBP: 00007fde8938c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.795754] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d0fbb1ec0 [ 34.796636] R13: 00007ffd4c23f3e0 R14: 00007ffd4c23f410 R15: 00007ffd4c23f770 [ 34.797530] [ 34.797831] [ 34.798063] Allocated by task 213: [ 34.798515] kasan_save_stack+0x22/0x50 [ 34.799033] kasan_set_track+0x25/0x30 [ 34.799545] __kasan_slab_alloc+0x59/0x70 [ 34.800086] kmem_cache_alloc+0x16b/0x370 [ 34.800623] vm_area_dup+0x20/0x160 [ 34.801095] __split_vma+0x170/0x950 [ 34.801578] split_vma+0xc6/0x110 [ 34.802045] mprotect_fixup+0x8d2/0xb30 [ 34.802559] do_mprotect_pkey+0x87e/0xd40 [ 34.803098] __x64_sys_mprotect+0x78/0xc0 [ 34.803644] do_syscall_64+0x3f/0x90 [ 34.804144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.804820] [ 34.805042] Freed by task 213: [ 34.805454] kasan_save_stack+0x22/0x50 [ 34.805993] kasan_set_track+0x25/0x30 [ 34.806505] kasan_save_free_info+0x2b/0x50 [ 34.807059] __kasan_slab_free+0x10a/0x190 [ 34.807614] kmem_cache_free+0x10d/0x4d0 [ 34.808145] rcu_core+0x8c8/0x2860 [ 34.808606] __do_softirq+0x1b7/0x7d4 [ 34.809097] [ 34.809318] Last potentially related work creation: [ 34.809922] kasan_save_stack+0x22/0x50 [ 34.810449] __kasan_record_aux_stack+0x8e/0xa0 [ 34.811043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.811711] remove_vma+0x139/0x170 [ 34.812179] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.812763] do_vmi_munmap+0x1f1/0x2b0 [ 34.813269] __vm_munmap+0x138/0x3a0 [ 34.813759] __x64_sys_munmap+0x59/0x80 [ 34.814285] do_syscall_64+0x3f/0x90 [ 34.814771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.815431] [ 34.815652] The buggy address belongs to the object at ffff88801bcee9f8 [ 34.815652] which belongs to the cache vm_area_struct of size 168 [ 34.817182] The buggy address is located 88 bytes inside of [ 34.817182] freed 168-byte region [ffff88801bcee9f8, ffff88801bceeaa0) [ 34.818649] [ 34.818869] The buggy address belongs to the physical page: [ 34.819553] page:000000008e73c193 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bcee [ 34.820680] memcg:ffff88800e06a001 [ 34.821123] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.821788] page_type: 0xffffffff() [ 34.822260] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.823312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e06a001 [ 34.824544] page dumped because: kasan: bad access detected [ 34.825437] [ 34.825731] Memory state around the buggy address: [ 34.826543] ffff88801bcee900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.827694] ffff88801bcee980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.828644] >ffff88801bceea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.829608] ^ [ 34.830395] ffff88801bceea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.831407] ffff88801bceeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.832366] ================================================================== [ 34.833486] Disabling lock debugging due to kernel taint [ 36.918180] BUG: Bad rss-counter state mm:00000000076dd029 type:MM_FILEPAGES val:33 [ 36.919746] BUG: Bad rss-counter state mm:00000000076dd029 type:MM_ANONPAGES val:22 [ 37.365426] BUG: Bad rss-counter state mm:00000000fc90a06c type:MM_FILEPAGES val:33 [ 37.366849] BUG: Bad rss-counter state mm:00000000fc90a06c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34514' (ECDSA) to the list of known hosts. 2023/06/20 03:13:53 fuzzer started 2023/06/20 03:13:54 dialing manager at localhost:44161 2023/06/20 03:13:54 checking machine... 2023/06/20 03:13:54 checking revisions... [ 38.095382] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:13:54 testing simple program... [ 38.139143] cgroup: Unknown subsys name 'net' [ 38.179616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:13:48 Registers: info registers vcpu 0 RAX=ffffea00005ac900 RBX=ffff888016b24000 RCX=ffff88800844f780 RDX=ffff888096b24000 RSI=ffff888016b23e40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800e98fa38 R8 =ffff888016b24000 R9 =0000000000000000 R10=ffffea00005ac8c0 R11=00000000800d0008 R12=dffffc0000000000 R13=ffff88800e98fa78 R14=0000000000000000 R15=ffff888016b23e40 RIP=ffffffff81810213 RFL=00000286 [--S--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 00007fa027640900 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=00007ffe7b064000 CR3=000000001abe6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=ffff888008c58400 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=00007faa7da82bb0 CR3=0000000009762000 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=2033353a33313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a33313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000