syzkaller login: [ 32.222548] BUG: Bad rss-counter state mm:00000000bf0b3dc0 type:MM_FILEPAGES val:33 [ 32.223949] BUG: Bad rss-counter state mm:00000000bf0b3dc0 type:MM_ANONPAGES val:22 [ 32.389619] ================================================================== [ 32.390684] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.391899] Read of size 8 at addr ffff88801a0183f8 by task sshd/220 [ 32.392652] [ 32.392864] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.393685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.394628] Call Trace: [ 32.394931] [ 32.395200] dump_stack_lvl+0x91/0xf0 [ 32.395666] print_report+0xcc/0x620 [ 32.396124] ? __virt_addr_valid+0x102/0x340 [ 32.396680] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.397265] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.397843] kasan_report+0xbe/0xf0 [ 32.398292] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.398876] vma_interval_tree_remove+0xc75/0xec0 [ 32.399446] vma_prepare+0xc54/0x11a0 [ 32.399903] __split_vma+0x5af/0x950 [ 32.400379] ? __pfx___split_vma+0x10/0x10 [ 32.400901] ? find_held_lock+0x2c/0x110 [ 32.401407] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.401955] ? lock_is_held_type+0x9f/0x120 [ 32.402483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.403070] ? mtree_range_walk+0x632/0x900 [ 32.403601] ? mas_walk+0x5c7/0x7c0 [ 32.404063] do_vmi_munmap+0x1f1/0x2b0 [ 32.404572] mmap_region+0x1f9/0x2660 [ 32.405043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.405540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.406256] ? __pfx_lock_acquire+0x10/0x10 [ 32.406792] ? __pfx_mmap_region+0x10/0x10 [ 32.407331] ? security_mmap_addr+0x7d/0xa0 [ 32.407875] ? get_unmapped_area+0x1f5/0x3f0 [ 32.408444] do_mmap+0x854/0xf00 [ 32.408865] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.409364] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.409920] ksys_mmap_pgoff+0x3af/0x500 [ 32.410429] do_syscall_64+0x3f/0x90 [ 32.410915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.411548] RIP: 0033:0x7f825ad73d82 [ 32.412006] 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 [ 32.414129] RSP: 002b:00007ffea9f4d888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.415023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f825ad73d82 [ 32.415860] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f825a1ad000 [ 32.416725] RBP: 00007f825a1ad000 R08: 0000000000000009 R09: 0000000000001000 [ 32.417565] R10: 0000000000000812 R11: 0000000000000206 R12: 000056471f7d6ec0 [ 32.418416] R13: 00007ffea9f4d8a0 R14: 00007ffea9f4d8d0 R15: 00007ffea9f4dc30 [ 32.419268] [ 32.419561] [ 32.419776] Allocated by task 213: [ 32.420203] kasan_save_stack+0x22/0x50 [ 32.420721] kasan_set_track+0x25/0x30 [ 32.421212] __kasan_slab_alloc+0x59/0x70 [ 32.421738] kmem_cache_alloc+0x16b/0x370 [ 32.422254] vm_area_dup+0x20/0x160 [ 32.422704] __split_vma+0x170/0x950 [ 32.423166] split_vma+0xc6/0x110 [ 32.423601] mprotect_fixup+0x8d2/0xb30 [ 32.424100] do_mprotect_pkey+0x87e/0xd40 [ 32.424621] __x64_sys_mprotect+0x78/0xc0 [ 32.425147] do_syscall_64+0x3f/0x90 [ 32.425611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.426243] [ 32.426458] Freed by task 213: [ 32.426840] kasan_save_stack+0x22/0x50 [ 32.427340] kasan_set_track+0x25/0x30 [ 32.427825] kasan_save_free_info+0x2b/0x50 [ 32.428366] __kasan_slab_free+0x10a/0x190 [ 32.428897] kmem_cache_free+0x10d/0x4d0 [ 32.429408] rcu_core+0x8c8/0x2860 [ 32.429852] __do_softirq+0x1b7/0x7d4 [ 32.430329] [ 32.430549] Last potentially related work creation: [ 32.431130] kasan_save_stack+0x22/0x50 [ 32.431628] __kasan_record_aux_stack+0x8e/0xa0 [ 32.432199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.432849] remove_vma+0x139/0x170 [ 32.433294] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.433851] do_vmi_munmap+0x1f1/0x2b0 [ 32.434330] __vm_munmap+0x138/0x3a0 [ 32.434790] __x64_sys_munmap+0x59/0x80 [ 32.435283] do_syscall_64+0x3f/0x90 [ 32.435758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.436384] [ 32.436602] The buggy address belongs to the object at ffff88801a0183a0 [ 32.436602] which belongs to the cache vm_area_struct of size 168 [ 32.438056] The buggy address is located 88 bytes inside of [ 32.438056] freed 168-byte region [ffff88801a0183a0, ffff88801a018448) [ 32.439460] [ 32.439676] The buggy address belongs to the physical page: [ 32.440361] page:0000000068bc5a6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a018 [ 32.441447] memcg:ffff88801035a201 [ 32.441862] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.442503] page_type: 0xffffffff() [ 32.442951] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.443862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801035a201 [ 32.444767] page dumped because: kasan: bad access detected [ 32.445424] [ 32.445633] Memory state around the buggy address: [ 32.446220] ffff88801a018280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.447066] ffff88801a018300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.447908] >ffff88801a018380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.448750] ^ [ 32.449591] ffff88801a018400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.450445] ffff88801a018480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.451286] ================================================================== [ 32.452288] Disabling lock debugging due to kernel taint [ 34.672906] BUG: Bad rss-counter state mm:0000000059ea1401 type:MM_FILEPAGES val:33 [ 34.674109] BUG: Bad rss-counter state mm:0000000059ea1401 type:MM_ANONPAGES val:22 [ 35.146079] BUG: Bad rss-counter state mm:00000000c9286d4c type:MM_FILEPAGES val:33 [ 35.147238] BUG: Bad rss-counter state mm:00000000c9286d4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40969' (ECDSA) to the list of known hosts. 2023/06/19 22:22:25 fuzzer started 2023/06/19 22:22:25 dialing manager at localhost:44161 2023/06/19 22:22:25 checking machine... 2023/06/19 22:22:25 checking revisions... [ 35.781783] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:22:25 testing simple program... [ 35.824705] cgroup: Unknown subsys name 'net' [ 35.863251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:22:23 Registers: info registers vcpu 0 RAX=1ffffffff0c9622b RBX=0000000000000002 RCX=ffffffff864b1158 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b115c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff81131118 RFL=00000217 [----APC] 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=00007f69746b61c0 CR3=0000000009662000 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=8af04f15d7fef3ac064bec40f7dbfc4e XMM02=ec2efd57dc4c00df000000000011cb90 XMM03=70dd5b546d1a72e8000000000011cc60 XMM04=a27cab96799c597a00000000000ae988 XMM05=627110f5267c8dee0000000000134148 XMM06=c291bd5c70af25b90000000000133b40 XMM07=e042d86d42eb936e00000000001240f0 XMM08=70dd5b546d1a72e8000000000011cc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016cbae25e8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000053878 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef1aa R11=0000000000000001 R12=0000000000053878 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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 00007f0a4879a900 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=00007f0a48764008 CR3=0000000016b36000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000