syzkaller login: [ 30.409716] BUG: Bad rss-counter state mm:0000000035a04817 type:MM_FILEPAGES val:33 [ 30.410660] BUG: Bad rss-counter state mm:0000000035a04817 type:MM_ANONPAGES val:22 [ 30.568328] ================================================================== [ 30.569178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.570060] Read of size 8 at addr ffff88800fd8ca50 by task sshd/221 [ 30.570814] [ 30.571112] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.572304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.573338] Call Trace: [ 30.573759] [ 30.574134] dump_stack_lvl+0x91/0xf0 [ 30.574628] print_report+0xcc/0x620 [ 30.575156] ? __virt_addr_valid+0x102/0x340 [ 30.575705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.576347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.576965] kasan_report+0xbe/0xf0 [ 30.577441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.578079] vma_interval_tree_remove+0xc75/0xec0 [ 30.578680] vma_prepare+0xc54/0x11a0 [ 30.579208] __split_vma+0x5af/0x950 [ 30.579674] ? __pfx___split_vma+0x10/0x10 [ 30.580229] ? find_held_lock+0x2c/0x110 [ 30.580751] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.581346] ? lock_is_held_type+0x9f/0x120 [ 30.581889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.582504] ? mtree_range_walk+0x632/0x900 [ 30.583104] ? mas_walk+0x5c7/0x7c0 [ 30.583590] do_vmi_munmap+0x1f1/0x2b0 [ 30.584101] mmap_region+0x1f9/0x2660 [ 30.584579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.585104] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.585816] ? __pfx_lock_acquire+0x10/0x10 [ 30.586373] ? __pfx_mmap_region+0x10/0x10 [ 30.586895] ? security_mmap_addr+0x7d/0xa0 [ 30.587475] ? get_unmapped_area+0x1f5/0x3f0 [ 30.588047] do_mmap+0x854/0xf00 [ 30.588490] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.589000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.589568] ksys_mmap_pgoff+0x3af/0x500 [ 30.590103] do_syscall_64+0x3f/0x90 [ 30.590589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.591299] RIP: 0033:0x7fd2f1294d82 [ 30.591759] 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 [ 30.593904] RSP: 002b:00007ffd8daedcb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.594830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2f1294d82 [ 30.595738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2f06ce000 [ 30.596618] RBP: 00007fd2f06ce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.597485] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d90fd41ec0 [ 30.598344] R13: 00007ffd8daedcd0 R14: 00007ffd8daedd00 R15: 00007ffd8daee060 [ 30.599234] [ 30.599522] [ 30.599735] Allocated by task 214: [ 30.600186] kasan_save_stack+0x22/0x50 [ 30.600688] kasan_set_track+0x25/0x30 [ 30.601201] __kasan_slab_alloc+0x59/0x70 [ 30.601719] kmem_cache_alloc+0x16b/0x370 [ 30.602243] vm_area_dup+0x20/0x160 [ 30.602700] __split_vma+0x170/0x950 [ 30.603213] split_vma+0xc6/0x110 [ 30.603651] mprotect_fixup+0x8d2/0xb30 [ 30.604169] do_mprotect_pkey+0x87e/0xd40 [ 30.604683] __x64_sys_mprotect+0x78/0xc0 [ 30.605222] do_syscall_64+0x3f/0x90 [ 30.605693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606354] [ 30.606575] Freed by task 214: [ 30.606985] kasan_save_stack+0x22/0x50 [ 30.607527] kasan_set_track+0x25/0x30 [ 30.608038] kasan_save_free_info+0x2b/0x50 [ 30.608573] __kasan_slab_free+0x10a/0x190 [ 30.609117] kmem_cache_free+0x10d/0x4d0 [ 30.609631] rcu_core+0x8c8/0x2860 [ 30.610090] __do_softirq+0x1b7/0x7d4 [ 30.610567] [ 30.610788] Last potentially related work creation: [ 30.611421] kasan_save_stack+0x22/0x50 [ 30.611928] __kasan_record_aux_stack+0x8e/0xa0 [ 30.612765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.613540] remove_vma+0x139/0x170 [ 30.614085] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.614754] do_vmi_munmap+0x1f1/0x2b0 [ 30.615259] __vm_munmap+0x138/0x3a0 [ 30.615702] __x64_sys_munmap+0x59/0x80 [ 30.616176] do_syscall_64+0x3f/0x90 [ 30.616626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.617231] [ 30.617437] The buggy address belongs to the object at ffff88800fd8c9f8 [ 30.617437] which belongs to the cache vm_area_struct of size 168 [ 30.618809] The buggy address is located 88 bytes inside of [ 30.618809] freed 168-byte region [ffff88800fd8c9f8, ffff88800fd8caa0) [ 30.620126] [ 30.620332] The buggy address belongs to the physical page: [ 30.620950] page:00000000bf2ecbea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd8c [ 30.621974] memcg:ffff88800cb67801 [ 30.622383] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.622986] page_type: 0xffffffff() [ 30.623421] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.624326] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb67801 [ 30.625214] page dumped because: kasan: bad access detected [ 30.626114] [ 30.626400] Memory state around the buggy address: [ 30.627208] ffff88800fd8c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.628349] ffff88800fd8c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.629283] >ffff88800fd8ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.630221] ^ [ 30.630991] ffff88800fd8ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.631947] ffff88800fd8cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.632881] ================================================================== [ 30.633889] Disabling lock debugging due to kernel taint [ 32.468476] BUG: Bad rss-counter state mm:00000000e5918cd8 type:MM_FILEPAGES val:33 [ 32.469222] BUG: Bad rss-counter state mm:00000000e5918cd8 type:MM_ANONPAGES val:22 [ 32.961621] BUG: Bad rss-counter state mm:00000000cf6b52bb type:MM_FILEPAGES val:33 [ 32.963028] BUG: Bad rss-counter state mm:00000000cf6b52bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13509' (ECDSA) to the list of known hosts. 2023/06/21 05:41:29 fuzzer started 2023/06/21 05:41:30 dialing manager at localhost:36067 2023/06/21 05:41:30 checking machine... 2023/06/21 05:41:30 checking revisions... [ 33.708737] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:41:30 testing simple program... [ 33.757596] cgroup: Unknown subsys name 'net' [ 33.817537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:41:29 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=00007f1692c7a990 CR3=00000000173f2000 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=2039323a31343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a31343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=1ffff11003949df0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801ca4ef90 RSP=ffff88801ca4eec8 R8 =ffffffff86138e90 R9 =ffff88801ca4ef78 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801ca4ef98 R13=ffff88801ca4ef80 R14=ffff88801ca4f288 R15=ffff88801ca4ef38 RIP=ffffffff81131c60 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 00007f094aa7c900 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=00007f094aa46008 CR3=000000001723c000 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