syzkaller login: [ 31.102305] BUG: Bad rss-counter state mm:00000000bdbf6858 type:MM_FILEPAGES val:33 [ 31.103302] BUG: Bad rss-counter state mm:00000000bdbf6858 type:MM_ANONPAGES val:22 [ 31.272309] ================================================================== [ 31.273214] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.274133] Read of size 8 at addr ffff888015e8f880 by task sshd/220 [ 31.274888] [ 31.275234] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.276123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.277080] Call Trace: [ 31.277411] [ 31.277698] dump_stack_lvl+0x91/0xf0 [ 31.278189] print_report+0xcc/0x620 [ 31.278668] ? __virt_addr_valid+0x102/0x340 [ 31.279209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280471] kasan_report+0xbe/0xf0 [ 31.280950] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281577] vma_interval_tree_remove+0xc75/0xec0 [ 31.282172] vma_prepare+0xc54/0x11a0 [ 31.282646] __split_vma+0x5af/0x950 [ 31.283112] ? __pfx___split_vma+0x10/0x10 [ 31.283645] ? find_held_lock+0x2c/0x110 [ 31.284155] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.284716] ? lock_is_held_type+0x9f/0x120 [ 31.285251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.285857] ? mtree_range_walk+0x632/0x900 [ 31.286402] ? mas_walk+0x5c7/0x7c0 [ 31.286885] do_vmi_munmap+0x1f1/0x2b0 [ 31.287373] mmap_region+0x1f9/0x2660 [ 31.287862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.288367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.289076] ? __pfx_lock_acquire+0x10/0x10 [ 31.289611] ? __pfx_mmap_region+0x10/0x10 [ 31.290143] ? security_mmap_addr+0x7d/0xa0 [ 31.290671] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291211] do_mmap+0x854/0xf00 [ 31.291665] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292721] ksys_mmap_pgoff+0x3af/0x500 [ 31.293225] do_syscall_64+0x3f/0x90 [ 31.293702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294344] RIP: 0033:0x7f191d59fd82 [ 31.294795] 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 [ 31.296903] RSP: 002b:00007ffeed6fdac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297800] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f191d59fd82 [ 31.298643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f191c9d9000 [ 31.299500] RBP: 00007f191c9d9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300345] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599c75bbec0 [ 31.301183] R13: 00007ffeed6fdae0 R14: 00007ffeed6fdb10 R15: 00007ffeed6fde70 [ 31.302034] [ 31.302324] [ 31.302540] Allocated by task 213: [ 31.302976] kasan_save_stack+0x22/0x50 [ 31.303487] kasan_set_track+0x25/0x30 [ 31.303984] __kasan_slab_alloc+0x59/0x70 [ 31.304504] kmem_cache_alloc+0x16b/0x370 [ 31.305025] vm_area_dup+0x20/0x160 [ 31.305476] __split_vma+0x170/0x950 [ 31.305946] split_vma+0xc6/0x110 [ 31.306381] mprotect_fixup+0x8d2/0xb30 [ 31.306876] do_mprotect_pkey+0x87e/0xd40 [ 31.307389] __x64_sys_mprotect+0x78/0xc0 [ 31.307940] do_syscall_64+0x3f/0x90 [ 31.308415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309056] [ 31.309270] Freed by task 213: [ 31.309658] kasan_save_stack+0x22/0x50 [ 31.310164] kasan_set_track+0x25/0x30 [ 31.310661] kasan_save_free_info+0x2b/0x50 [ 31.311196] __kasan_slab_free+0x10a/0x190 [ 31.311741] kmem_cache_free+0x10d/0x4d0 [ 31.312249] rcu_core+0x8c8/0x2860 [ 31.312695] __do_softirq+0x1b7/0x7d4 [ 31.313169] [ 31.313386] Last potentially related work creation: [ 31.313979] kasan_save_stack+0x22/0x50 [ 31.314487] __kasan_record_aux_stack+0x8e/0xa0 [ 31.315068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.315744] remove_vma+0x139/0x170 [ 31.316262] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.316818] do_vmi_munmap+0x1f1/0x2b0 [ 31.317303] __vm_munmap+0x138/0x3a0 [ 31.317767] __x64_sys_munmap+0x59/0x80 [ 31.318263] do_syscall_64+0x3f/0x90 [ 31.318739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319383] [ 31.319613] Second to last potentially related work creation: [ 31.320294] kasan_save_stack+0x22/0x50 [ 31.320793] __kasan_record_aux_stack+0x8e/0xa0 [ 31.321365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.322006] remove_vma+0x139/0x170 [ 31.322456] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.323013] do_vmi_munmap+0x1f1/0x2b0 [ 31.323498] mmap_region+0x1f9/0x2660 [ 31.323976] do_mmap+0x854/0xf00 [ 31.324404] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.324898] ksys_mmap_pgoff+0x7d/0x500 [ 31.325391] do_syscall_64+0x3f/0x90 [ 31.325867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.326509] [ 31.326727] The buggy address belongs to the object at ffff888015e8f828 [ 31.326727] which belongs to the cache vm_area_struct of size 168 [ 31.328226] The buggy address is located 88 bytes inside of [ 31.328226] freed 168-byte region [ffff888015e8f828, ffff888015e8f8d0) [ 31.329610] [ 31.329830] The buggy address belongs to the physical page: [ 31.330485] page:000000002a918e2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e8f [ 31.331583] memcg:ffff888015c90f01 [ 31.332005] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.332647] page_type: 0xffffffff() [ 31.333095] raw: 0100000000000200 ffff8880087a0c80 ffffea000057a200 0000000000000006 [ 31.334002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c90f01 [ 31.334907] page dumped because: kasan: bad access detected [ 31.335572] [ 31.335791] Memory state around the buggy address: [ 31.336368] ffff888015e8f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.337217] ffff888015e8f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.338063] >ffff888015e8f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.338906] ^ [ 31.339315] ffff888015e8f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.340180] ffff888015e8f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.341025] ================================================================== [ 31.341960] Disabling lock debugging due to kernel taint [ 33.583702] BUG: Bad rss-counter state mm:000000009ef135f5 type:MM_FILEPAGES val:33 [ 33.584881] BUG: Bad rss-counter state mm:000000009ef135f5 type:MM_ANONPAGES val:22 [ 34.035698] BUG: Bad rss-counter state mm:000000003ba8dad4 type:MM_FILEPAGES val:33 [ 34.036696] BUG: Bad rss-counter state mm:000000003ba8dad4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44156' (ECDSA) to the list of known hosts. 2023/06/20 18:30:17 fuzzer started 2023/06/20 18:30:18 dialing manager at localhost:36067 2023/06/20 18:30:18 checking machine... 2023/06/20 18:30:18 checking revisions... [ 34.771315] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:30:18 testing simple program... [ 34.829072] cgroup: Unknown subsys name 'net' [ 34.872886] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:30:17 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff81130bd6 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 00007fcc3390f900 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=00007ffe8c19f000 CR3=000000000ecf4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f40f3a39820 CR3=00000000145be000 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=7e8726102c908cbfe44babc20c5fa200 XMM02=000000000011b5e8eff9b2d0a8fce9cb XMM03=000000000011b6b82c67c8bc2e329bc3 XMM04=65e4c3c734ebf27b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133ec8 XMM06=c291bd5c70af25b90000000000133d50 XMM07=e042d86d42eb936e0000000000122fa8 XMM08=dd1a91b652175b77000000000011b6b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000