syzkaller login: [ 31.631139] BUG: Bad rss-counter state mm:00000000c80a0ae6 type:MM_FILEPAGES val:33 [ 31.632468] BUG: Bad rss-counter state mm:00000000c80a0ae6 type:MM_ANONPAGES val:22 [ 31.781097] ================================================================== [ 31.782040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.783017] Read of size 8 at addr ffff8880147ac3f8 by task sshd/219 [ 31.783792] [ 31.784014] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.784978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.785972] Call Trace: [ 31.786289] [ 31.786598] dump_stack_lvl+0x91/0xf0 [ 31.787112] print_report+0xcc/0x620 [ 31.787613] ? __virt_addr_valid+0x102/0x340 [ 31.788168] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.788797] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789420] kasan_report+0xbe/0xf0 [ 31.789906] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790546] vma_interval_tree_remove+0xc75/0xec0 [ 31.791157] vma_prepare+0xc54/0x11a0 [ 31.791643] __split_vma+0x5af/0x950 [ 31.792121] ? __pfx___split_vma+0x10/0x10 [ 31.792660] ? find_held_lock+0x2c/0x110 [ 31.793186] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.793762] ? lock_is_held_type+0x9f/0x120 [ 31.794310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.794954] ? mtree_range_walk+0x632/0x900 [ 31.795519] ? mas_walk+0x5c7/0x7c0 [ 31.796005] do_vmi_munmap+0x1f1/0x2b0 [ 31.796510] mmap_region+0x1f9/0x2660 [ 31.797002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.797527] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.798246] ? __pfx_lock_acquire+0x10/0x10 [ 31.798801] ? __pfx_mmap_region+0x10/0x10 [ 31.799344] ? security_mmap_addr+0x7d/0xa0 [ 31.799883] ? get_unmapped_area+0x1f5/0x3f0 [ 31.800446] do_mmap+0x854/0xf00 [ 31.800895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.801400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.801974] ksys_mmap_pgoff+0x3af/0x500 [ 31.802500] do_syscall_64+0x3f/0x90 [ 31.802990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803655] RIP: 0033:0x7f41adb1dd82 [ 31.804116] 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 [ 31.806270] RSP: 002b:00007ffd9db5d9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41adb1dd82 [ 31.808089] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41acf57000 [ 31.808945] RBP: 00007f41acf57000 R08: 0000000000000009 R09: 0000000000001000 [ 31.809804] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db80067d90 [ 31.810683] R13: 00007ffd9db5d9c0 R14: 00007ffd9db5d9f0 R15: 00007ffd9db5dd50 [ 31.811553] [ 31.811851] [ 31.812073] Allocated by task 212: [ 31.812504] kasan_save_stack+0x22/0x50 [ 31.813021] kasan_set_track+0x25/0x30 [ 31.813518] __kasan_slab_alloc+0x59/0x70 [ 31.814053] kmem_cache_alloc+0x16b/0x370 [ 31.814602] vm_area_dup+0x20/0x160 [ 31.815063] __split_vma+0x170/0x950 [ 31.815535] split_vma+0xc6/0x110 [ 31.815982] mprotect_fixup+0x8d2/0xb30 [ 31.816495] do_mprotect_pkey+0x87e/0xd40 [ 31.817029] __x64_sys_mprotect+0x78/0xc0 [ 31.817554] do_syscall_64+0x3f/0x90 [ 31.818033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818687] [ 31.818909] Freed by task 212: [ 31.819315] kasan_save_stack+0x22/0x50 [ 31.819834] kasan_set_track+0x25/0x30 [ 31.820340] kasan_save_free_info+0x2b/0x50 [ 31.820889] __kasan_slab_free+0x10a/0x190 [ 31.821430] kmem_cache_free+0x10d/0x4d0 [ 31.821950] rcu_core+0x8c8/0x2860 [ 31.822416] __do_softirq+0x1b7/0x7d4 [ 31.822913] [ 31.823136] Last potentially related work creation: [ 31.823739] kasan_save_stack+0x22/0x50 [ 31.824259] __kasan_record_aux_stack+0x8e/0xa0 [ 31.824846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.825493] remove_vma+0x139/0x170 [ 31.825948] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.826541] do_vmi_munmap+0x1f1/0x2b0 [ 31.827044] __vm_munmap+0x138/0x3a0 [ 31.827526] __x64_sys_munmap+0x59/0x80 [ 31.828033] do_syscall_64+0x3f/0x90 [ 31.828520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.829170] [ 31.829393] Second to last potentially related work creation: [ 31.830088] kasan_save_stack+0x22/0x50 [ 31.830603] __kasan_record_aux_stack+0x8e/0xa0 [ 31.831185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.831855] remove_vma+0x139/0x170 [ 31.832318] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.832881] do_vmi_munmap+0x1f1/0x2b0 [ 31.833374] mmap_region+0x1f9/0x2660 [ 31.833867] do_mmap+0x854/0xf00 [ 31.834307] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.834842] ksys_mmap_pgoff+0x3af/0x500 [ 31.835351] do_syscall_64+0x3f/0x90 [ 31.835838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.836497] [ 31.836727] The buggy address belongs to the object at ffff8880147ac3a0 [ 31.836727] which belongs to the cache vm_area_struct of size 168 [ 31.838238] The buggy address is located 88 bytes inside of [ 31.838238] freed 168-byte region [ffff8880147ac3a0, ffff8880147ac448) [ 31.839685] [ 31.839909] The buggy address belongs to the physical page: [ 31.840585] page:000000001ca57641 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880147ac0e8 pfn:0x147ac [ 31.841844] memcg:ffff8880102c8e01 [ 31.842283] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.843000] page_type: 0xffffffff() [ 31.843458] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 31.844396] raw: ffff8880147ac0e8 0000000080110008 00000001ffffffff ffff8880102c8e01 [ 31.845315] page dumped because: kasan: bad access detected [ 31.846000] [ 31.846223] Memory state around the buggy address: [ 31.846822] ffff8880147ac280: fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb [ 31.847689] ffff8880147ac300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.848553] >ffff8880147ac380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.849411] ^ [ 31.850259] ffff8880147ac400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.851153] ffff8880147ac480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.852022] ================================================================== [ 31.853058] Disabling lock debugging due to kernel taint [ 33.395536] BUG: Bad rss-counter state mm:00000000b72e3d99 type:MM_FILEPAGES val:33 [ 33.396268] BUG: Bad rss-counter state mm:00000000b72e3d99 type:MM_ANONPAGES val:22 [ 33.962432] BUG: Bad rss-counter state mm:000000002878ce78 type:MM_FILEPAGES val:33 [ 33.963608] BUG: Bad rss-counter state mm:000000002878ce78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6887' (ECDSA) to the list of known hosts. 2023/06/20 20:20:22 fuzzer started 2023/06/20 20:20:22 dialing manager at localhost:36067 2023/06/20 20:20:22 checking machine... 2023/06/20 20:20:22 checking revisions... [ 34.598098] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:20:23 testing simple program... [ 34.646632] cgroup: Unknown subsys name 'net' [ 34.688089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:20:22 Registers: info registers vcpu 0 RAX=0000000000006525 RBX=ffffffff85d3e490 RCX=1ffffffff0ba7a85 RDX=00000000fffbee70 RSI=0000000000000000 RDI=ffff888010313a74 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09c58 R8 =00000000fffd8897 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=ffffffff85d3d41c R13=ffff88806ce3a2c0 R14=1ffff1100d9c139c R15=0000000000000000 RIP=ffffffff8137cc71 RFL=00000046 [---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 00007f17d4f7b900 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=00007f17d439a4d0 CR3=000000000caca000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=69538e97a888fffb00000000000ae988 XMM05=5fe1470d1d882ec50000000000134378 XMM06=7bb2abe6040d40d10000000000133118 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888014769b40 RSI=ffffffff8386f270 RDI=0000000000000005 RBP=ffff888015edfd90 RSP=ffff888015edfc88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000001 R14=ffff888019cb86b8 R15=0000000000000000 RIP=ffffffff813744b6 RFL=00000293 [--S-A-C] 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 00007f78c4c09900 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=00007fff7b040000 CR3=000000000db5e000 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=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