syzkaller login: [ 32.607205] BUG: Bad rss-counter state mm:00000000298ef3c0 type:MM_FILEPAGES val:33 [ 32.608714] BUG: Bad rss-counter state mm:00000000298ef3c0 type:MM_ANONPAGES val:22 [ 32.776687] ================================================================== [ 32.777765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.778783] Read of size 8 at addr ffff88801838b968 by task sshd/220 [ 32.779629] [ 32.779848] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.780717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.781727] Call Trace: [ 32.782049] [ 32.782334] dump_stack_lvl+0x91/0xf0 [ 32.782828] print_report+0xcc/0x620 [ 32.783313] ? __virt_addr_valid+0x102/0x340 [ 32.783863] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.784486] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.785096] kasan_report+0xbe/0xf0 [ 32.785569] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.786206] vma_interval_tree_remove+0xc75/0xec0 [ 32.786816] vma_prepare+0xc54/0x11a0 [ 32.787295] __split_vma+0x5af/0x950 [ 32.787762] ? __pfx___split_vma+0x10/0x10 [ 32.788292] ? find_held_lock+0x2c/0x110 [ 32.788813] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.789375] ? lock_is_held_type+0x9f/0x120 [ 32.789920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.790524] ? mtree_range_walk+0x632/0x900 [ 32.791069] ? mas_walk+0x5c7/0x7c0 [ 32.791541] do_vmi_munmap+0x1f1/0x2b0 [ 32.792034] mmap_region+0x1f9/0x2660 [ 32.792514] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.793021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.793728] ? __pfx_lock_acquire+0x10/0x10 [ 32.794267] ? __pfx_mmap_region+0x10/0x10 [ 32.794796] ? security_mmap_addr+0x7d/0xa0 [ 32.795332] ? get_unmapped_area+0x1f5/0x3f0 [ 32.795880] do_mmap+0x854/0xf00 [ 32.796318] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.796810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.797375] ksys_mmap_pgoff+0x3af/0x500 [ 32.797901] do_syscall_64+0x3f/0x90 [ 32.798383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.799021] RIP: 0033:0x7f2f08dded82 [ 32.799483] 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 [ 32.801581] RSP: 002b:00007fff5b565098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.802519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f08dded82 [ 32.803369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f08218000 [ 32.804213] RBP: 00007f2f08218000 R08: 0000000000000009 R09: 0000000000001000 [ 32.805050] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565cfe27ec0 [ 32.805896] R13: 00007fff5b5650b0 R14: 00007fff5b5650e0 R15: 00007fff5b565440 [ 32.806740] [ 32.807033] [ 32.807247] Allocated by task 213: [ 32.807675] kasan_save_stack+0x22/0x50 [ 32.808179] kasan_set_track+0x25/0x30 [ 32.808671] __kasan_slab_alloc+0x59/0x70 [ 32.809196] kmem_cache_alloc+0x16b/0x370 [ 32.809712] vm_area_dup+0x20/0x160 [ 32.810184] __split_vma+0x170/0x950 [ 32.810654] split_vma+0xc6/0x110 [ 32.811088] mprotect_fixup+0x8d2/0xb30 [ 32.811586] do_mprotect_pkey+0x87e/0xd40 [ 32.812111] __x64_sys_mprotect+0x78/0xc0 [ 32.812625] do_syscall_64+0x3f/0x90 [ 32.813099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.813735] [ 32.813967] Freed by task 213: [ 32.814359] kasan_save_stack+0x22/0x50 [ 32.814862] kasan_set_track+0x25/0x30 [ 32.815357] kasan_save_free_info+0x2b/0x50 [ 32.815893] __kasan_slab_free+0x10a/0x190 [ 32.816420] kmem_cache_free+0x10d/0x4d0 [ 32.816929] rcu_core+0x8c8/0x2860 [ 32.817371] __do_softirq+0x1b7/0x7d4 [ 32.817862] [ 32.818078] Last potentially related work creation: [ 32.818659] kasan_save_stack+0x22/0x50 [ 32.819170] __kasan_record_aux_stack+0x8e/0xa0 [ 32.819746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.820398] remove_vma+0x139/0x170 [ 32.820849] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.821409] do_vmi_munmap+0x1f1/0x2b0 [ 32.821903] __vm_munmap+0x138/0x3a0 [ 32.822375] __x64_sys_munmap+0x59/0x80 [ 32.822880] do_syscall_64+0x3f/0x90 [ 32.823354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.823991] [ 32.824210] The buggy address belongs to the object at ffff88801838b910 [ 32.824210] which belongs to the cache vm_area_struct of size 168 [ 32.825669] The buggy address is located 88 bytes inside of [ 32.825669] freed 168-byte region [ffff88801838b910, ffff88801838b9b8) [ 32.827066] [ 32.827281] The buggy address belongs to the physical page: [ 32.827933] page:000000008a143e1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1838b [ 32.829017] memcg:ffff88800d930501 [ 32.829438] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.830093] page_type: 0xffffffff() [ 32.830542] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.831454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d930501 [ 32.832363] page dumped because: kasan: bad access detected [ 32.833012] [ 32.833228] Memory state around the buggy address: [ 32.833806] ffff88801838b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.834653] ffff88801838b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.835504] >ffff88801838b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.836346] ^ [ 32.837121] ffff88801838b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.838000] ffff88801838ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.838836] ================================================================== [ 32.839934] Disabling lock debugging due to kernel taint [ 35.082666] BUG: Bad rss-counter state mm:00000000499417c4 type:MM_FILEPAGES val:33 [ 35.083529] BUG: Bad rss-counter state mm:00000000499417c4 type:MM_ANONPAGES val:22 [ 35.522290] BUG: Bad rss-counter state mm:00000000165cc21b type:MM_FILEPAGES val:33 [ 35.523265] BUG: Bad rss-counter state mm:00000000165cc21b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17297' (ECDSA) to the list of known hosts. 2023/06/19 12:38:22 fuzzer started 2023/06/19 12:38:22 dialing manager at localhost:44161 2023/06/19 12:38:22 checking machine... 2023/06/19 12:38:22 checking revisions... [ 36.212298] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:38:22 testing simple program... [ 36.268404] cgroup: Unknown subsys name 'net' [ 36.332916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:38:19 Registers: info registers vcpu 0 RAX=00000000c823bf98 RBX=00000000bc30ec7f RCX=ffff8880100c7710 RDX=0000000000000012 RSI=000000000000000c RDI=000000008a316e5c RBP=ffff88800844f780 RSP=ffff8880100c7648 R8 =0000000043cf1380 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092c40 R14=ffff8880100c76b0 R15=0000000000000012 RIP=ffffffff82270e94 RFL=00000202 [-------] 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 00007fcecffff700 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=00007f0deb195fc0 CR3=000000000ea16000 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=2031323a38333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11003048fac RCX=ffffffff81718643 RDX=ffff88800c7c8000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888018247d38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=800000001b56a005 R13=ffffffff852c41f8 R14=000000001c970007 R15=000000001bc74067 RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fddaf0f1900 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=00007fddaf6a5ae8 CR3=0000000016b28000 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