syzkaller login: [ 31.311903] BUG: Bad rss-counter state mm:000000001de08f8f type:MM_FILEPAGES val:33 [ 31.313121] BUG: Bad rss-counter state mm:000000001de08f8f type:MM_ANONPAGES val:22 [ 31.354458] ================================================================== [ 31.355675] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.356752] Read of size 8 at addr ffff888016c62228 by task sshd/220 [ 31.357635] [ 31.357893] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.358906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.360047] Call Trace: [ 31.360417] [ 31.360749] dump_stack_lvl+0x91/0xf0 [ 31.361323] print_report+0xcc/0x620 [ 31.361889] ? __virt_addr_valid+0x102/0x340 [ 31.362568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.364008] kasan_report+0xbe/0xf0 [ 31.364579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365335] vma_interval_tree_remove+0xc75/0xec0 [ 31.366069] vma_prepare+0xc54/0x11a0 [ 31.366656] __split_vma+0x5af/0x950 [ 31.367234] ? __pfx___split_vma+0x10/0x10 [ 31.367979] ? find_held_lock+0x2c/0x110 [ 31.368725] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.369534] ? lock_is_held_type+0x9f/0x120 [ 31.370347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.371076] ? mtree_range_walk+0x632/0x900 [ 31.371695] ? mas_walk+0x5c7/0x7c0 [ 31.372222] do_vmi_munmap+0x1f1/0x2b0 [ 31.372766] mmap_region+0x1f9/0x2660 [ 31.373306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.373877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.374673] ? __pfx_lock_acquire+0x10/0x10 [ 31.375259] ? __pfx_mmap_region+0x10/0x10 [ 31.375852] ? security_mmap_addr+0x7d/0xa0 [ 31.376441] ? get_unmapped_area+0x1f5/0x3f0 [ 31.377050] do_mmap+0x854/0xf00 [ 31.377541] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.378126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.378777] ksys_mmap_pgoff+0x3af/0x500 [ 31.379348] do_syscall_64+0x3f/0x90 [ 31.379893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380750] RIP: 0033:0x7f4182cc2d82 [ 31.381355] 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 [ 31.384110] RSP: 002b:00007ffc6b509858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.385241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4182cc2d82 [ 31.386361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41820fc000 [ 31.387430] RBP: 00007f41820fc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.388492] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a612a9ec0 [ 31.389552] R13: 00007ffc6b509870 R14: 00007ffc6b5098a0 R15: 00007ffc6b509c00 [ 31.390666] [ 31.391039] [ 31.391319] Allocated by task 213: [ 31.391868] kasan_save_stack+0x22/0x50 [ 31.392529] kasan_set_track+0x25/0x30 [ 31.393153] __kasan_slab_alloc+0x59/0x70 [ 31.393821] kmem_cache_alloc+0x16b/0x370 [ 31.394461] vm_area_dup+0x20/0x160 [ 31.395024] __split_vma+0x170/0x950 [ 31.395604] split_vma+0xc6/0x110 [ 31.396137] mprotect_fixup+0x8d2/0xb30 [ 31.396789] do_mprotect_pkey+0x87e/0xd40 [ 31.397450] __x64_sys_mprotect+0x78/0xc0 [ 31.398120] do_syscall_64+0x3f/0x90 [ 31.398734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399547] [ 31.399828] Freed by task 213: [ 31.400342] kasan_save_stack+0x22/0x50 [ 31.400970] kasan_set_track+0x25/0x30 [ 31.401583] kasan_save_free_info+0x2b/0x50 [ 31.402286] __kasan_slab_free+0x10a/0x190 [ 31.402956] kmem_cache_free+0x10d/0x4d0 [ 31.403601] rcu_core+0x8c8/0x2860 [ 31.404163] __do_softirq+0x1b7/0x7d4 [ 31.404760] [ 31.405029] Last potentially related work creation: [ 31.405759] kasan_save_stack+0x22/0x50 [ 31.406378] __kasan_record_aux_stack+0x8e/0xa0 [ 31.407059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.407841] remove_vma+0x139/0x170 [ 31.408379] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.409031] do_vmi_munmap+0x1f1/0x2b0 [ 31.409634] __vm_munmap+0x138/0x3a0 [ 31.410224] __x64_sys_munmap+0x59/0x80 [ 31.410847] do_syscall_64+0x3f/0x90 [ 31.411402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412189] [ 31.412453] The buggy address belongs to the object at ffff888016c621d0 [ 31.412453] which belongs to the cache vm_area_struct of size 168 [ 31.414122] The buggy address is located 88 bytes inside of [ 31.414122] freed 168-byte region [ffff888016c621d0, ffff888016c62278) [ 31.415672] [ 31.415934] The buggy address belongs to the physical page: [ 31.416746] page:000000007ca7400f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c62 [ 31.418080] memcg:ffff88800fddfd01 [ 31.418614] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.419371] page_type: 0xffffffff() [ 31.419926] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.420999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fddfd01 [ 31.422080] page dumped because: kasan: bad access detected [ 31.422873] [ 31.423124] Memory state around the buggy address: [ 31.423806] ffff888016c62100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.424844] ffff888016c62180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.425881] >ffff888016c62200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.426893] ^ [ 31.427518] ffff888016c62280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.428539] ffff888016c62300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.429545] ================================================================== [ 31.430885] Disabling lock debugging due to kernel taint [ 33.623305] BUG: Bad rss-counter state mm:00000000591d4605 type:MM_FILEPAGES val:33 [ 33.625238] BUG: Bad rss-counter state mm:00000000591d4605 type:MM_ANONPAGES val:22 [ 34.095026] BUG: Bad rss-counter state mm:0000000047e3afc2 type:MM_FILEPAGES val:33 [ 34.096002] BUG: Bad rss-counter state mm:0000000047e3afc2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59402' (ECDSA) to the list of known hosts. 2023/06/21 07:58:10 fuzzer started 2023/06/21 07:58:10 dialing manager at localhost:36067 2023/06/21 07:58:10 checking machine... 2023/06/21 07:58:10 checking revisions... [ 34.819281] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:58:11 testing simple program... [ 34.869466] cgroup: Unknown subsys name 'net' [ 34.945194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:10 Registers: info registers vcpu 0 RAX=ffffffff81289068 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407e01 RSI=ffffffff85407ec8 RDI=ffffffff85407ec8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff860b9c96 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ed0 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 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 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=00007ffc3b676c78 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=00007fa7cb560510000055a6e0045790 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=00007f97bfdec014 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880160d8001 RSI=ffff8880160d7f58 RDI=ffff8880160d7fd8 RBP=ffff88806cf09a78 RSP=ffff88806cf099a8 R8 =ffffffff864bbb58 R9 =ffff88806cf09a60 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806cf09a80 R13=ffff88806cf09a68 R14=ffff8880160d7f58 R15=ffff88806cf09a20 RIP=ffffffff8112fbf3 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 00007f97bf7ad700 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=00007ff3de381160 CR3=000000000f25a000 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=38353a3730203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363833 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000