syzkaller login: [ 31.271086] BUG: Bad rss-counter state mm:00000000ee4f2068 type:MM_FILEPAGES val:33 [ 31.272449] BUG: Bad rss-counter state mm:00000000ee4f2068 type:MM_ANONPAGES val:22 [ 31.307768] ================================================================== [ 31.308761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.309801] Read of size 8 at addr ffff88800fcf0df0 by task sshd/219 [ 31.310561] [ 31.310781] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.311633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.312616] Call Trace: [ 31.312933] [ 31.313214] dump_stack_lvl+0x91/0xf0 [ 31.313700] print_report+0xcc/0x620 [ 31.314178] ? __virt_addr_valid+0x102/0x340 [ 31.314744] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.315386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.316047] kasan_report+0xbe/0xf0 [ 31.316539] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.317199] vma_interval_tree_remove+0xc75/0xec0 [ 31.317834] vma_prepare+0xc54/0x11a0 [ 31.318326] __split_vma+0x5af/0x950 [ 31.318820] ? __pfx___split_vma+0x10/0x10 [ 31.319363] ? find_held_lock+0x2c/0x110 [ 31.319922] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.320508] ? lock_is_held_type+0x9f/0x120 [ 31.321070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.321705] ? mtree_range_walk+0x632/0x900 [ 31.322279] ? mas_walk+0x5c7/0x7c0 [ 31.322769] do_vmi_munmap+0x1f1/0x2b0 [ 31.323287] mmap_region+0x1f9/0x2660 [ 31.323799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.324336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.325085] ? __pfx_lock_acquire+0x10/0x10 [ 31.325643] ? __pfx_mmap_region+0x10/0x10 [ 31.326202] ? security_mmap_addr+0x7d/0xa0 [ 31.326750] ? get_unmapped_area+0x1f5/0x3f0 [ 31.327319] do_mmap+0x854/0xf00 [ 31.327789] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.328307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.328884] ksys_mmap_pgoff+0x3af/0x500 [ 31.329418] do_syscall_64+0x3f/0x90 [ 31.329921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330594] RIP: 0033:0x7fb083079d82 [ 31.331075] 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 [ 31.333345] RSP: 002b:00007fffccc01028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.334305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb083079d82 [ 31.335207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0824b3000 [ 31.336116] RBP: 00007fb0824b3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.336999] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae78756ec0 [ 31.337886] R13: 00007fffccc01040 R14: 00007fffccc01070 R15: 00007fffccc013d0 [ 31.338781] [ 31.339085] [ 31.339308] Allocated by task 212: [ 31.339759] kasan_save_stack+0x22/0x50 [ 31.340284] kasan_set_track+0x25/0x30 [ 31.340797] __kasan_slab_alloc+0x59/0x70 [ 31.341347] kmem_cache_alloc+0x16b/0x370 [ 31.341887] vm_area_dup+0x20/0x160 [ 31.342362] __split_vma+0x170/0x950 [ 31.342840] split_vma+0xc6/0x110 [ 31.343300] mprotect_fixup+0x8d2/0xb30 [ 31.343849] do_mprotect_pkey+0x87e/0xd40 [ 31.344391] __x64_sys_mprotect+0x78/0xc0 [ 31.344931] do_syscall_64+0x3f/0x90 [ 31.345422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346092] [ 31.346315] Freed by task 212: [ 31.346732] kasan_save_stack+0x22/0x50 [ 31.347264] kasan_set_track+0x25/0x30 [ 31.347786] kasan_save_free_info+0x2b/0x50 [ 31.348343] __kasan_slab_free+0x10a/0x190 [ 31.348899] kmem_cache_free+0x10d/0x4d0 [ 31.349427] rcu_core+0x8c8/0x2860 [ 31.349885] __do_softirq+0x1b7/0x7d4 [ 31.350384] [ 31.350613] Last potentially related work creation: [ 31.351219] kasan_save_stack+0x22/0x50 [ 31.351768] __kasan_record_aux_stack+0x8e/0xa0 [ 31.352361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.353036] remove_vma+0x139/0x170 [ 31.353502] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.354089] do_vmi_munmap+0x1f1/0x2b0 [ 31.354592] __vm_munmap+0x138/0x3a0 [ 31.355082] __x64_sys_munmap+0x59/0x80 [ 31.355603] do_syscall_64+0x3f/0x90 [ 31.356108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356774] [ 31.356994] The buggy address belongs to the object at ffff88800fcf0d98 [ 31.356994] which belongs to the cache vm_area_struct of size 168 [ 31.358541] The buggy address is located 88 bytes inside of [ 31.358541] freed 168-byte region [ffff88800fcf0d98, ffff88800fcf0e40) [ 31.360036] [ 31.360260] The buggy address belongs to the physical page: [ 31.360954] page:0000000067a1989d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcf0 [ 31.362079] memcg:ffff888014168501 [ 31.362523] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.363196] page_type: 0xffffffff() [ 31.363667] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.364645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014168501 [ 31.365587] page dumped because: kasan: bad access detected [ 31.366290] [ 31.366513] Memory state around the buggy address: [ 31.367131] ffff88800fcf0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.368030] ffff88800fcf0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.368927] >ffff88800fcf0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.369825] ^ [ 31.370661] ffff88800fcf0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.371561] ffff88800fcf0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.372497] ================================================================== [ 31.373647] Disabling lock debugging due to kernel taint [ 33.345858] BUG: Bad rss-counter state mm:0000000025399977 type:MM_FILEPAGES val:33 [ 33.346852] BUG: Bad rss-counter state mm:0000000025399977 type:MM_ANONPAGES val:22 [ 33.815899] BUG: Bad rss-counter state mm:0000000068e0c7e6 type:MM_FILEPAGES val:33 [ 33.816943] BUG: Bad rss-counter state mm:0000000068e0c7e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22920' (ECDSA) to the list of known hosts. 2023/06/20 03:35:28 fuzzer started 2023/06/20 03:35:29 dialing manager at localhost:44161 2023/06/20 03:35:29 checking machine... 2023/06/20 03:35:29 checking revisions... [ 34.489984] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:35:29 testing simple program... [ 34.532486] cgroup: Unknown subsys name 'net' [ 34.590232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:28 Registers: info registers vcpu 0 RAX=1ffffffff0bbf8d5 RBX=ffffffff85dfc6a8 RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a8 RSP=ffff88800fe67910 R8 =ffffffff86137004 R9 =ffff88800fe67a08 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f0f90d52700 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=00007f860ae910b0 CR3=000000000ca3a000 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=2038323a35333a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a35333a3330203032 XMM08=3d656e696c646d632022656369767265 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=00007fa221d5e320 CR3=000000000c9f0000 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=0ae90f51d90cc280f54bf28656a7db79 XMM02=000000000011e600ec2efd57dc4c00df XMM03=0000000000125308a5c9562896fcd886 XMM04=8d28071d77a7a04c00000000000ae988 XMM05=dfcdbad4f1609c370000000000134eb0 XMM06=0e3a2a82cee574dd0000000000133d18 XMM07=e042d86d42eb936e0000000000125588 XMM08=a5c9562896fcd886000000000011e660 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000