syzkaller login: [ 68.739752] BUG: Bad rss-counter state mm:00000000806abc5b type:MM_FILEPAGES val:33 [ 68.740855] BUG: Bad rss-counter state mm:00000000806abc5b type:MM_ANONPAGES val:22 [ 68.912083] ================================================================== [ 68.913228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.914380] Read of size 8 at addr ffff888016cf9a50 by task sshd/229 [ 68.915399] [ 68.915629] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.916527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.917561] Call Trace: [ 68.917898] [ 68.918193] dump_stack_lvl+0x91/0xf0 [ 68.918692] print_report+0xcc/0x620 [ 68.919189] ? __virt_addr_valid+0x102/0x340 [ 68.919762] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.920400] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.921047] kasan_report+0xbe/0xf0 [ 68.921538] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.922180] vma_interval_tree_remove+0xc75/0xec0 [ 68.922806] vma_prepare+0xc54/0x11a0 [ 68.923301] __split_vma+0x5af/0x950 [ 68.923784] ? __pfx___split_vma+0x10/0x10 [ 68.924324] ? find_held_lock+0x2c/0x110 [ 68.924866] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.925467] ? lock_is_held_type+0x9f/0x120 [ 68.926026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.926652] ? mtree_range_walk+0x632/0x900 [ 68.927220] ? mas_walk+0x5c7/0x7c0 [ 68.927717] do_vmi_munmap+0x1f1/0x2b0 [ 68.928222] mmap_region+0x1f9/0x2660 [ 68.928721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.929259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.929993] ? __pfx_lock_acquire+0x10/0x10 [ 68.930547] ? __pfx_mmap_region+0x10/0x10 [ 68.931099] ? security_mmap_addr+0x7d/0xa0 [ 68.931651] ? get_unmapped_area+0x1f5/0x3f0 [ 68.932217] do_mmap+0x854/0xf00 [ 68.932671] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.933198] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.933779] ksys_mmap_pgoff+0x3af/0x500 [ 68.934301] do_syscall_64+0x3f/0x90 [ 68.934793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.935454] RIP: 0033:0x7fb25a093d82 [ 68.935924] 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 [ 68.938127] RSP: 002b:00007ffd5bc69798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.939089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb25a093d82 [ 68.939972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2594cd000 [ 68.940855] RBP: 00007fb2594cd000 R08: 0000000000000009 R09: 0000000000001000 [ 68.941703] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588a32e8ec0 [ 68.942548] R13: 00007ffd5bc697b0 R14: 00007ffd5bc697e0 R15: 00007ffd5bc69b40 [ 68.943401] [ 68.943688] [ 68.943903] Allocated by task 222: [ 68.944325] kasan_save_stack+0x22/0x50 [ 68.944819] kasan_set_track+0x25/0x30 [ 68.945336] __kasan_slab_alloc+0x59/0x70 [ 68.945863] kmem_cache_alloc+0x16b/0x370 [ 68.946375] vm_area_dup+0x20/0x160 [ 68.946832] __split_vma+0x170/0x950 [ 68.947297] split_vma+0xc6/0x110 [ 68.947738] mprotect_fixup+0x8d2/0xb30 [ 68.948238] do_mprotect_pkey+0x87e/0xd40 [ 68.948753] __x64_sys_mprotect+0x78/0xc0 [ 68.949287] do_syscall_64+0x3f/0x90 [ 68.949757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.950400] [ 68.950617] Freed by task 205: [ 68.951012] kasan_save_stack+0x22/0x50 [ 68.951512] kasan_set_track+0x25/0x30 [ 68.952001] kasan_save_free_info+0x2b/0x50 [ 68.952530] __kasan_slab_free+0x10a/0x190 [ 68.953064] kmem_cache_free+0x10d/0x4d0 [ 68.953565] rcu_core+0x8c8/0x2860 [ 68.954007] __do_softirq+0x1b7/0x7d4 [ 68.954478] [ 68.954691] Last potentially related work creation: [ 68.955274] kasan_save_stack+0x22/0x50 [ 68.955774] __kasan_record_aux_stack+0x8e/0xa0 [ 68.956343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.956978] remove_vma+0x139/0x170 [ 68.957451] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.958001] do_vmi_munmap+0x1f1/0x2b0 [ 68.958479] __vm_munmap+0x138/0x3a0 [ 68.958945] __x64_sys_munmap+0x59/0x80 [ 68.959441] do_syscall_64+0x3f/0x90 [ 68.959910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.960550] [ 68.960764] The buggy address belongs to the object at ffff888016cf99f8 [ 68.960764] which belongs to the cache vm_area_struct of size 168 [ 68.962226] The buggy address is located 88 bytes inside of [ 68.962226] freed 168-byte region [ffff888016cf99f8, ffff888016cf9aa0) [ 68.963618] [ 68.963834] The buggy address belongs to the physical page: [ 68.964486] page:00000000cdac6b02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cf9 [ 68.965581] memcg:ffff88801585ee01 [ 68.966005] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.966645] page_type: 0xffffffff() [ 68.967095] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.968008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801585ee01 [ 68.968905] page dumped because: kasan: bad access detected [ 68.969571] [ 68.969785] Memory state around the buggy address: [ 68.970357] ffff888016cf9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.971208] ffff888016cf9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 68.972058] >ffff888016cf9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.972900] ^ [ 68.973609] ffff888016cf9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 68.974459] ffff888016cf9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.975306] ================================================================== [ 68.976257] Disabling lock debugging due to kernel taint [ 70.903828] BUG: Bad rss-counter state mm:00000000e67de6a6 type:MM_FILEPAGES val:33 [ 70.905079] BUG: Bad rss-counter state mm:00000000e67de6a6 type:MM_ANONPAGES val:22 [ 71.427687] BUG: Bad rss-counter state mm:000000009ba3b3c9 type:MM_FILEPAGES val:33 [ 71.428696] BUG: Bad rss-counter state mm:000000009ba3b3c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31448' (ECDSA) to the list of known hosts. 2023/06/20 23:17:47 fuzzer started 2023/06/20 23:17:47 dialing manager at localhost:36067 2023/06/20 23:17:47 checking machine... 2023/06/20 23:17:47 checking revisions... [ 72.111639] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:17:48 testing simple program... [ 72.161862] cgroup: Unknown subsys name 'net' [ 72.230246] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:17:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff633046c8 CR3=0000000005482000 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=00007fe4e3da151000005584a3013790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81af9b5d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff888018037bd8 RDI=ffffffff81af9b5d RBP=ffff88806cf09ac8 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000246fc R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800e478000 R15=ffff888016770a10 RIP=ffffffff811303b9 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 00007fdcb9583700 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=00007f085401d650 CR3=0000000018230000 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=2037343a37313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3933 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3933325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a37313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000