syzkaller login: [ 31.170031] BUG: Bad rss-counter state mm:00000000cce45d58 type:MM_FILEPAGES val:33 [ 31.171096] BUG: Bad rss-counter state mm:00000000cce45d58 type:MM_ANONPAGES val:22 [ 31.350242] ================================================================== [ 31.351332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.352536] Read of size 8 at addr ffff888016cb2880 by task sshd/222 [ 31.353435] [ 31.353664] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.354580] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.355634] Call Trace: [ 31.355975] [ 31.356274] dump_stack_lvl+0x91/0xf0 [ 31.356799] print_report+0xcc/0x620 [ 31.357313] ? __virt_addr_valid+0x102/0x340 [ 31.357899] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358555] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359227] kasan_report+0xbe/0xf0 [ 31.359742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360404] vma_interval_tree_remove+0xc75/0xec0 [ 31.361047] vma_prepare+0xc54/0x11a0 [ 31.361557] __split_vma+0x5af/0x950 [ 31.362056] ? __pfx___split_vma+0x10/0x10 [ 31.362637] ? find_held_lock+0x2c/0x110 [ 31.363188] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.363793] ? lock_is_held_type+0x9f/0x120 [ 31.364368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.365019] ? mtree_range_walk+0x632/0x900 [ 31.365606] ? mas_walk+0x5c7/0x7c0 [ 31.366112] do_vmi_munmap+0x1f1/0x2b0 [ 31.366645] mmap_region+0x1f9/0x2660 [ 31.367161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.367707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.368466] ? __pfx_lock_acquire+0x10/0x10 [ 31.369037] ? __pfx_mmap_region+0x10/0x10 [ 31.369600] ? security_mmap_addr+0x7d/0xa0 [ 31.370163] ? get_unmapped_area+0x1f5/0x3f0 [ 31.370763] do_mmap+0x854/0xf00 [ 31.371227] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.371757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.372354] ksys_mmap_pgoff+0x3af/0x500 [ 31.372893] do_syscall_64+0x3f/0x90 [ 31.373406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374088] RIP: 0033:0x7fd90294fd82 [ 31.374579] 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 [ 31.376871] RSP: 002b:00007ffdc73ab8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.377841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd90294fd82 [ 31.378758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd901d89000 [ 31.379661] RBP: 00007fd901d89000 R08: 0000000000000009 R09: 0000000000001000 [ 31.380561] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571509d3ec0 [ 31.381463] R13: 00007ffdc73ab910 R14: 00007ffdc73ab940 R15: 00007ffdc73abca0 [ 31.382374] [ 31.382709] [ 31.382940] Allocated by task 215: [ 31.383397] kasan_save_stack+0x22/0x50 [ 31.383935] kasan_set_track+0x25/0x30 [ 31.384468] __kasan_slab_alloc+0x59/0x70 [ 31.385026] kmem_cache_alloc+0x16b/0x370 [ 31.385573] vm_area_dup+0x20/0x160 [ 31.386052] __split_vma+0x170/0x950 [ 31.386548] split_vma+0xc6/0x110 [ 31.387025] mprotect_fixup+0x8d2/0xb30 [ 31.387566] do_mprotect_pkey+0x87e/0xd40 [ 31.388121] __x64_sys_mprotect+0x78/0xc0 [ 31.388673] do_syscall_64+0x3f/0x90 [ 31.389175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389866] [ 31.390094] Freed by task 19: [ 31.390503] kasan_save_stack+0x22/0x50 [ 31.391045] kasan_set_track+0x25/0x30 [ 31.391569] kasan_save_free_info+0x2b/0x50 [ 31.392140] __kasan_slab_free+0x10a/0x190 [ 31.392704] kmem_cache_free+0x10d/0x4d0 [ 31.393250] rcu_core+0x8c8/0x2860 [ 31.393730] __do_softirq+0x1b7/0x7d4 [ 31.394239] [ 31.394472] Last potentially related work creation: [ 31.395111] kasan_save_stack+0x22/0x50 [ 31.395650] __kasan_record_aux_stack+0x8e/0xa0 [ 31.396263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.396947] remove_vma+0x139/0x170 [ 31.397424] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.398022] do_vmi_munmap+0x1f1/0x2b0 [ 31.398540] __vm_munmap+0x138/0x3a0 [ 31.399050] __x64_sys_munmap+0x59/0x80 [ 31.399585] do_syscall_64+0x3f/0x90 [ 31.400090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400775] [ 31.401005] The buggy address belongs to the object at ffff888016cb2828 [ 31.401005] which belongs to the cache vm_area_struct of size 168 [ 31.402567] The buggy address is located 88 bytes inside of [ 31.402567] freed 168-byte region [ffff888016cb2828, ffff888016cb28d0) [ 31.404094] [ 31.404324] The buggy address belongs to the physical page: [ 31.405024] page:0000000025099bfe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cb2 [ 31.406180] memcg:ffff888016e0f101 [ 31.406649] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.407330] page_type: 0xffffffff() [ 31.407811] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.408787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e0f101 [ 31.409756] page dumped because: kasan: bad access detected [ 31.410458] [ 31.410698] Memory state around the buggy address: [ 31.411316] ffff888016cb2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.412227] ffff888016cb2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.413146] >ffff888016cb2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.414055] ^ [ 31.414498] ffff888016cb2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.415420] ffff888016cb2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.416324] ================================================================== [ 31.417529] Disabling lock debugging due to kernel taint [ 34.244848] BUG: Bad rss-counter state mm:00000000f725bede type:MM_FILEPAGES val:33 [ 34.245923] BUG: Bad rss-counter state mm:00000000f725bede type:MM_ANONPAGES val:22 [ 34.689745] BUG: Bad rss-counter state mm:000000008b9a58b1 type:MM_FILEPAGES val:33 [ 34.690837] BUG: Bad rss-counter state mm:000000008b9a58b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47030' (ECDSA) to the list of known hosts. 2023/06/21 07:04:00 fuzzer started 2023/06/21 07:04:00 dialing manager at localhost:36067 2023/06/21 07:04:00 checking machine... 2023/06/21 07:04:00 checking revisions... [ 35.430878] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:04:00 testing simple program... [ 35.482972] cgroup: Unknown subsys name 'net' [ 35.522425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:04:00 Registers: info registers vcpu 0 RAX=ffffffff81861410 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff88801425ff58 RBP=ffff88801425ff48 RSP=ffff88801425ff38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88801425ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81861414 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 00007ff1dfd78900 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=00007ff1e03300b0 CR3=0000000016050000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007fcf5c0db238 CR3=000000000d806000 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=bbdce7b592ed8888ec49add153fadc86 XMM02=ec2efd57dc4c00df000000000011ec90 XMM03=d4419cdca4fd203a000000000011ed60 XMM04=f1c1c7281f4f3d0100000000000ae988 XMM05=59d5b690e0af863b0000000000133df8 XMM06=24895e636078d9360000000000132c60 XMM07=e042d86d42eb936e0000000000124a28 XMM08=d4419cdca4fd203a000000000011ed60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000