syzkaller login: [ 30.155253] BUG: Bad rss-counter state mm:000000009c39b668 type:MM_FILEPAGES val:33 [ 30.156577] BUG: Bad rss-counter state mm:000000009c39b668 type:MM_ANONPAGES val:22 [ 30.308151] ================================================================== [ 30.309118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.310063] Read of size 8 at addr ffff88801a218228 by task sshd/220 [ 30.310995] [ 30.311216] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.312099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.313262] Call Trace: [ 30.313661] [ 30.314016] dump_stack_lvl+0x91/0xf0 [ 30.314621] print_report+0xcc/0x620 [ 30.315217] ? __virt_addr_valid+0x102/0x340 [ 30.315896] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316657] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.317431] kasan_report+0xbe/0xf0 [ 30.318024] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.318786] vma_interval_tree_remove+0xc75/0xec0 [ 30.319530] vma_prepare+0xc54/0x11a0 [ 30.320124] __split_vma+0x5af/0x950 [ 30.320709] ? __pfx___split_vma+0x10/0x10 [ 30.321399] ? find_held_lock+0x2c/0x110 [ 30.321936] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.322520] ? lock_is_held_type+0x9f/0x120 [ 30.323074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.323701] ? mtree_range_walk+0x632/0x900 [ 30.324257] ? mas_walk+0x5c7/0x7c0 [ 30.324740] do_vmi_munmap+0x1f1/0x2b0 [ 30.325253] mmap_region+0x1f9/0x2660 [ 30.325743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.326265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.326991] ? __pfx_lock_acquire+0x10/0x10 [ 30.327533] ? __pfx_mmap_region+0x10/0x10 [ 30.328074] ? security_mmap_addr+0x7d/0xa0 [ 30.328616] ? get_unmapped_area+0x1f5/0x3f0 [ 30.329191] do_mmap+0x854/0xf00 [ 30.329636] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.330136] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.330710] ksys_mmap_pgoff+0x3af/0x500 [ 30.331229] do_syscall_64+0x3f/0x90 [ 30.331721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.332384] RIP: 0033:0x7f5c6a7e9d82 [ 30.332870] 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 [ 30.335046] RSP: 002b:00007ffd882e3868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.335963] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c6a7e9d82 [ 30.336832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c69c23000 [ 30.337712] RBP: 00007f5c69c23000 R08: 0000000000000009 R09: 0000000000001000 [ 30.338580] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a17ef93ec0 [ 30.339436] R13: 00007ffd882e3880 R14: 00007ffd882e38b0 R15: 00007ffd882e3c10 [ 30.340314] [ 30.340606] [ 30.340825] Allocated by task 213: [ 30.341267] kasan_save_stack+0x22/0x50 [ 30.341779] kasan_set_track+0x25/0x30 [ 30.342283] __kasan_slab_alloc+0x59/0x70 [ 30.342818] kmem_cache_alloc+0x16b/0x370 [ 30.343346] vm_area_dup+0x20/0x160 [ 30.343811] __split_vma+0x170/0x950 [ 30.344285] split_vma+0xc6/0x110 [ 30.344735] mprotect_fixup+0x8d2/0xb30 [ 30.345255] do_mprotect_pkey+0x87e/0xd40 [ 30.345782] __x64_sys_mprotect+0x78/0xc0 [ 30.346311] do_syscall_64+0x3f/0x90 [ 30.346796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347455] [ 30.347668] Freed by task 213: [ 30.348055] kasan_save_stack+0x22/0x50 [ 30.348546] kasan_set_track+0x25/0x30 [ 30.349078] kasan_save_free_info+0x2b/0x50 [ 30.349603] __kasan_slab_free+0x10a/0x190 [ 30.350128] kmem_cache_free+0x10d/0x4d0 [ 30.350626] rcu_core+0x8c8/0x2860 [ 30.351062] __do_softirq+0x1b7/0x7d4 [ 30.351531] [ 30.351743] Last potentially related work creation: [ 30.352316] kasan_save_stack+0x22/0x50 [ 30.352816] __kasan_record_aux_stack+0x8e/0xa0 [ 30.353401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.354037] remove_vma+0x139/0x170 [ 30.354484] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.355033] do_vmi_munmap+0x1f1/0x2b0 [ 30.355537] __vm_munmap+0x138/0x3a0 [ 30.356022] __x64_sys_munmap+0x59/0x80 [ 30.356540] do_syscall_64+0x3f/0x90 [ 30.357035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.357686] [ 30.357902] The buggy address belongs to the object at ffff88801a2181d0 [ 30.357902] which belongs to the cache vm_area_struct of size 168 [ 30.359402] The buggy address is located 88 bytes inside of [ 30.359402] freed 168-byte region [ffff88801a2181d0, ffff88801a218278) [ 30.360827] [ 30.361050] The buggy address belongs to the physical page: [ 30.361722] page:00000000bc5fd258 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a218 [ 30.362828] memcg:ffff888018181901 [ 30.363261] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.363930] page_type: 0xffffffff() [ 30.364403] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.365388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018181901 [ 30.366351] page dumped because: kasan: bad access detected [ 30.367058] [ 30.367285] Memory state around the buggy address: [ 30.367908] ffff88801a218100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.368821] ffff88801a218180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.369739] >ffff88801a218200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.370639] ^ [ 30.371221] ffff88801a218280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.372140] ffff88801a218300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.373051] ================================================================== [ 30.374466] Disabling lock debugging due to kernel taint [ 32.665911] BUG: Bad rss-counter state mm:00000000a7fd7feb type:MM_FILEPAGES val:33 [ 32.666916] BUG: Bad rss-counter state mm:00000000a7fd7feb type:MM_ANONPAGES val:22 [ 33.146095] BUG: Bad rss-counter state mm:00000000421aaf76 type:MM_FILEPAGES val:33 [ 33.147075] BUG: Bad rss-counter state mm:00000000421aaf76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59216' (ECDSA) to the list of known hosts. 2023/06/21 04:28:05 fuzzer started 2023/06/21 04:28:06 dialing manager at localhost:36067 2023/06/21 04:28:06 checking machine... 2023/06/21 04:28:06 checking revisions... [ 33.883455] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:28:06 testing simple program... [ 33.935246] cgroup: Unknown subsys name 'net' [ 33.990152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:28:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016519800 RCX=0000000000000000 RDX=1ffffffff0b7d655 RSI=ffffffff83c16fe7 RDI=ffffffff85beb2a8 RBP=ffff88800fdffb68 RSP=ffff88800fdff8d8 R8 =0000000000000001 R9 =0000000000000003 R10=0000000000000000 R11=0000000000000000 R12=0000000000000041 R13=ffffffff85beb1c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff83c17026 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 00007f36d3b19700 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=00007f0d97ae60b0 CR3=000000000d874000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809aef RBX=ffffffff85dfdcbc RCX=ffffffff81809a90 RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88806cf099b8 R8 =ffffffff86138976 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000293 [--S-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 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=00007fc77726b4e0 CR3=0000000010334000 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=a3fb39955a1ff294da4a162834a5b1f2 XMM02=ec2efd57dc4c00df000000000011a278 XMM03=806b5b63f8792f26000000000011a348 XMM04=7206c2521d0dea6c00000000000ae988 XMM05=e4cb8bb95a7664b600000000001315b8 XMM06=951969e3dc64a81d0000000000130420 XMM07=e042d86d42eb936e00000000001219d0 XMM08=806b5b63f8792f26000000000011a348 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000