syzkaller login: [ 30.084456] BUG: Bad rss-counter state mm:0000000040018e98 type:MM_FILEPAGES val:33 [ 30.085241] BUG: Bad rss-counter state mm:0000000040018e98 type:MM_ANONPAGES val:22 [ 30.225036] ================================================================== [ 30.226157] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.227297] Read of size 8 at addr ffff88800e611d08 by task sshd/220 [ 30.228314] [ 30.228481] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.229034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.229671] Call Trace: [ 30.229872] [ 30.230056] dump_stack_lvl+0x91/0xf0 [ 30.230383] print_report+0xcc/0x620 [ 30.230689] ? __virt_addr_valid+0x102/0x340 [ 30.231039] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231440] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231836] kasan_report+0xbe/0xf0 [ 30.232136] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.232533] vma_interval_tree_remove+0xc75/0xec0 [ 30.232916] vma_prepare+0xc54/0x11a0 [ 30.233220] __split_vma+0x5af/0x950 [ 30.233516] ? __pfx___split_vma+0x10/0x10 [ 30.233848] ? find_held_lock+0x2c/0x110 [ 30.234181] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.234544] ? lock_is_held_type+0x9f/0x120 [ 30.234878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.235262] ? mtree_range_walk+0x632/0x900 [ 30.235612] ? mas_walk+0x5c7/0x7c0 [ 30.235910] do_vmi_munmap+0x1f1/0x2b0 [ 30.236221] mmap_region+0x1f9/0x2660 [ 30.236523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.236856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.237313] ? __pfx_lock_acquire+0x10/0x10 [ 30.237649] ? __pfx_mmap_region+0x10/0x10 [ 30.237993] ? security_mmap_addr+0x7d/0xa0 [ 30.238340] ? get_unmapped_area+0x1f5/0x3f0 [ 30.238692] do_mmap+0x854/0xf00 [ 30.238969] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.239286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.239640] ksys_mmap_pgoff+0x3af/0x500 [ 30.239964] do_syscall_64+0x3f/0x90 [ 30.240276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.240692] RIP: 0033:0x7fa9ff800d82 [ 30.240978] 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 [ 30.242347] RSP: 002b:00007ffecee9eb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.242929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9ff800d82 [ 30.243475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9fec3a000 [ 30.244027] RBP: 00007fa9fec3a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.244577] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9820f5b20 [ 30.245125] R13: 00007ffecee9ebb0 R14: 00007ffecee9ebe0 R15: 00007ffecee9ef40 [ 30.245689] [ 30.245878] [ 30.246013] Allocated by task 213: [ 30.246302] kasan_save_stack+0x22/0x50 [ 30.246619] kasan_set_track+0x25/0x30 [ 30.246920] __kasan_slab_alloc+0x59/0x70 [ 30.247258] kmem_cache_alloc+0x16b/0x370 [ 30.247587] vm_area_dup+0x20/0x160 [ 30.247874] __split_vma+0x170/0x950 [ 30.248174] split_vma+0xc6/0x110 [ 30.248452] mprotect_fixup+0x8d2/0xb30 [ 30.248774] do_mprotect_pkey+0x87e/0xd40 [ 30.249106] __x64_sys_mprotect+0x78/0xc0 [ 30.249434] do_syscall_64+0x3f/0x90 [ 30.249736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250144] [ 30.250283] Freed by task 19: [ 30.250524] kasan_save_stack+0x22/0x50 [ 30.250841] kasan_set_track+0x25/0x30 [ 30.251152] kasan_save_free_info+0x2b/0x50 [ 30.251489] __kasan_slab_free+0x10a/0x190 [ 30.251826] kmem_cache_free+0x10d/0x4d0 [ 30.252145] rcu_core+0x8c8/0x2860 [ 30.252425] __do_softirq+0x1b7/0x7d4 [ 30.252725] [ 30.252860] Last potentially related work creation: [ 30.253234] kasan_save_stack+0x22/0x50 [ 30.253552] __kasan_record_aux_stack+0x8e/0xa0 [ 30.253918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.254507] remove_vma+0x139/0x170 [ 30.255061] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.255728] do_vmi_munmap+0x1f1/0x2b0 [ 30.256302] __vm_munmap+0x138/0x3a0 [ 30.256855] __x64_sys_munmap+0x59/0x80 [ 30.257439] do_syscall_64+0x3f/0x90 [ 30.258002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.258799] [ 30.259054] The buggy address belongs to the object at ffff88800e611cb0 [ 30.259054] which belongs to the cache vm_area_struct of size 168 [ 30.260774] The buggy address is located 88 bytes inside of [ 30.260774] freed 168-byte region [ffff88800e611cb0, ffff88800e611d58) [ 30.262435] [ 30.262694] The buggy address belongs to the physical page: [ 30.263474] page:00000000e8f8be9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe611 [ 30.264787] memcg:ffff888014529d01 [ 30.265310] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.266098] page_type: 0xffffffff() [ 30.266653] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.267766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014529d01 [ 30.268752] page dumped because: kasan: bad access detected [ 30.269227] [ 30.269380] Memory state around the buggy address: [ 30.269811] ffff88800e611c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.270442] ffff88800e611c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.271060] >ffff88800e611d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.271675] ^ [ 30.271988] ffff88800e611d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.272616] ffff88800e611e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.273226] ================================================================== [ 30.273941] Disabling lock debugging due to kernel taint [ 32.368571] BUG: Bad rss-counter state mm:000000001b372785 type:MM_FILEPAGES val:33 [ 32.369593] BUG: Bad rss-counter state mm:000000001b372785 type:MM_ANONPAGES val:22 [ 32.835803] BUG: Bad rss-counter state mm:00000000a0349d38 type:MM_FILEPAGES val:33 [ 32.836846] BUG: Bad rss-counter state mm:00000000a0349d38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26263' (ECDSA) to the list of known hosts. 2023/06/20 20:53:01 fuzzer started 2023/06/20 20:53:01 dialing manager at localhost:36067 2023/06/20 20:53:01 checking machine... 2023/06/20 20:53:01 checking revisions... [ 33.555412] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:53:01 testing simple program... [ 33.613207] cgroup: Unknown subsys name 'net' [ 33.672523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:53:01 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=ffff888008c04000 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=00007f0e1dc4f760 CR3=000000000ee6c000 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=4093a97bb8c2d9bda34180a0ac083093 XMM02=000000000011a8f8eff9b2d0a8fce9cb XMM03=000000000011a9c82c67c8bc2e329bc3 XMM04=732da5d82cdc05d700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c60 XMM06=62a355d87801f1720000000000130ac8 XMM07=e042d86d42eb936e0000000000121db8 XMM08=1566b35e81def17f000000000011a9c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000558faabc59b8 RBX=0000558faabc59b0 RCX=0000558faaba4010 RDX=0000000000000000 RSI=0000000000000007 RDI=0000558faabe92c0 RBP=00007fcdd0ab55c0 RSP=00007ffe34f81490 R8 =0000558faabea180 R9 =0000000000000000 R10=00007fcdd1029e10 R11=0000000000000000 R12=0000000000800204 R13=0000558faabc4778 R14=00007fcdd0ab58b8 R15=0000000000000000 RIP=00007fcdd0aad16c RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcdd0ad7900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe34f7b000 CR3=0000000017cdc000 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=ffffffffffffffffffff000000000000 XMM01=01000101010101010100ffffffffffff XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000