syzkaller login: [ 46.317894] BUG: Bad rss-counter state mm:00000000093244a0 type:MM_FILEPAGES val:33 [ 46.319716] BUG: Bad rss-counter state mm:00000000093244a0 type:MM_ANONPAGES val:22 [ 46.481890] ================================================================== [ 46.482802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.483948] Read of size 8 at addr ffff888016794968 by task sshd/221 [ 46.484725] [ 46.484940] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.485864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.486852] Call Trace: [ 46.487175] [ 46.487462] dump_stack_lvl+0x91/0xf0 [ 46.487956] print_report+0xcc/0x620 [ 46.488440] ? __virt_addr_valid+0x102/0x340 [ 46.489004] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.489669] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.490281] kasan_report+0xbe/0xf0 [ 46.490754] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.491376] vma_interval_tree_remove+0xc75/0xec0 [ 46.491980] vma_prepare+0xc54/0x11a0 [ 46.492469] __split_vma+0x5af/0x950 [ 46.492936] ? __pfx___split_vma+0x10/0x10 [ 46.493512] ? find_held_lock+0x2c/0x110 [ 46.494027] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.494590] ? lock_is_held_type+0x9f/0x120 [ 46.495121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.495727] ? mtree_range_walk+0x632/0x900 [ 46.496267] ? mas_walk+0x5c7/0x7c0 [ 46.496740] do_vmi_munmap+0x1f1/0x2b0 [ 46.497282] mmap_region+0x1f9/0x2660 [ 46.497762] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.498270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.498991] ? __pfx_lock_acquire+0x10/0x10 [ 46.499518] ? __pfx_mmap_region+0x10/0x10 [ 46.500044] ? security_mmap_addr+0x7d/0xa0 [ 46.500565] ? get_unmapped_area+0x1f5/0x3f0 [ 46.501125] do_mmap+0x854/0xf00 [ 46.501593] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.502086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.502642] ksys_mmap_pgoff+0x3af/0x500 [ 46.503163] do_syscall_64+0x3f/0x90 [ 46.503642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.504277] RIP: 0033:0x7f81a449fd82 [ 46.504731] 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 [ 46.506893] RSP: 002b:00007ffedcf3ada8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.507790] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81a449fd82 [ 46.508628] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81a38d9000 [ 46.509513] RBP: 00007f81a38d9000 R08: 0000000000000009 R09: 0000000000001000 [ 46.510354] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594307ce980 [ 46.511197] R13: 00007ffedcf3adc0 R14: 00007ffedcf3adf0 R15: 00007ffedcf3b150 [ 46.512050] [ 46.512338] [ 46.512550] Allocated by task 214: [ 46.512969] kasan_save_stack+0x22/0x50 [ 46.513520] kasan_set_track+0x25/0x30 [ 46.514015] __kasan_slab_alloc+0x59/0x70 [ 46.514535] kmem_cache_alloc+0x16b/0x370 [ 46.515050] vm_area_dup+0x20/0x160 [ 46.515502] __split_vma+0x170/0x950 [ 46.515959] split_vma+0xc6/0x110 [ 46.516388] mprotect_fixup+0x8d2/0xb30 [ 46.516879] do_mprotect_pkey+0x87e/0xd40 [ 46.517452] __x64_sys_mprotect+0x78/0xc0 [ 46.517972] do_syscall_64+0x3f/0x90 [ 46.518444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.519074] [ 46.519287] Freed by task 19: [ 46.519666] kasan_save_stack+0x22/0x50 [ 46.520162] kasan_set_track+0x25/0x30 [ 46.520651] kasan_save_free_info+0x2b/0x50 [ 46.521233] __kasan_slab_free+0x10a/0x190 [ 46.521759] kmem_cache_free+0x10d/0x4d0 [ 46.522260] rcu_core+0x8c8/0x2860 [ 46.522700] __do_softirq+0x1b7/0x7d4 [ 46.523180] [ 46.523392] Last potentially related work creation: [ 46.523970] kasan_save_stack+0x22/0x50 [ 46.524466] __kasan_record_aux_stack+0x8e/0xa0 [ 46.525039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.525822] remove_vma+0x139/0x170 [ 46.526276] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.526823] do_vmi_munmap+0x1f1/0x2b0 [ 46.527305] __vm_munmap+0x138/0x3a0 [ 46.527765] __x64_sys_munmap+0x59/0x80 [ 46.528258] do_syscall_64+0x3f/0x90 [ 46.528724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.529404] [ 46.529618] The buggy address belongs to the object at ffff888016794910 [ 46.529618] which belongs to the cache vm_area_struct of size 168 [ 46.531209] The buggy address is located 88 bytes inside of [ 46.531209] freed 168-byte region [ffff888016794910, ffff8880167949b8) [ 46.532908] [ 46.533221] The buggy address belongs to the physical page: [ 46.534026] page:00000000734286e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16794 [ 46.535360] memcg:ffff8880168f5d01 [ 46.535876] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.536650] page_type: 0xffffffff() [ 46.537258] raw: 0100000000000200 ffff88800879fc80 ffffea0000569f80 dead00000000000c [ 46.538354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168f5d01 [ 46.539452] page dumped because: kasan: bad access detected [ 46.540245] [ 46.540502] Memory state around the buggy address: [ 46.541253] ffff888016794800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 46.542288] ffff888016794880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 46.543319] >ffff888016794900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.544343] ^ [ 46.545342] ffff888016794980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 46.546382] ffff888016794a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.547410] ================================================================== [ 46.548775] Disabling lock debugging due to kernel taint [ 48.434767] BUG: Bad rss-counter state mm:00000000781ea831 type:MM_FILEPAGES val:33 [ 48.435786] BUG: Bad rss-counter state mm:00000000781ea831 type:MM_ANONPAGES val:22 [ 48.902990] BUG: Bad rss-counter state mm:00000000116a9063 type:MM_FILEPAGES val:33 [ 48.904060] BUG: Bad rss-counter state mm:00000000116a9063 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37380' (ECDSA) to the list of known hosts. 2023/06/20 09:40:35 fuzzer started 2023/06/20 09:40:35 dialing manager at localhost:44161 2023/06/20 09:40:35 checking machine... 2023/06/20 09:40:35 checking revisions... [ 49.686129] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:40:36 testing simple program... [ 49.731167] cgroup: Unknown subsys name 'net' [ 49.771251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:20 Registers: info registers vcpu 0 RAX=ffffffff8180a04c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003935ed9 RSI=ffff88801c9afa00 RDI=ffffffff8180a04c RBP=ffff88801c9af6c8 RSP=ffff88801c9af660 R8 =0000000000000001 R9 =ffff88801c9af6b0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88801c9af738 R13=0000000000000000 R14=ffff88800f791b40 R15=ffff8880084c6140 RIP=ffffffff811303b9 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 00007fac6ebf3900 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=00007fac6ebb8008 CR3=000000000f192000 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=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 info registers vcpu 1 RAX=00000000d1fb0de8 RBX=00000000ac7ac9b0 RCX=ffff88806cf09c00 RDX=0000000000000007 RSI=0000000000000002 RDI=00000000b360421e RBP=ffffffff813782a8 RSP=ffff88806cf09b68 R8 =0000000006e5786e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270ed4 RFL=00000286 [--S--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 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=00007f3d98f2ba60 CR3=000000001687a000 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=2035333a30343a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a30343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000