syzkaller login: [ 30.944639] BUG: Bad rss-counter state mm:00000000ff81f05c type:MM_FILEPAGES val:33 [ 30.945836] BUG: Bad rss-counter state mm:00000000ff81f05c type:MM_ANONPAGES val:22 [ 30.983226] ================================================================== [ 30.984189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.985195] Read of size 8 at addr ffff8880102503f8 by task sshd/220 [ 30.985970] [ 30.986186] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.987083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.988079] Call Trace: [ 30.988402] [ 30.988686] dump_stack_lvl+0x91/0xf0 [ 30.989185] print_report+0xcc/0x620 [ 30.989668] ? __virt_addr_valid+0x102/0x340 [ 30.990224] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990845] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.991481] kasan_report+0xbe/0xf0 [ 30.991971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992602] vma_interval_tree_remove+0xc75/0xec0 [ 30.993210] vma_prepare+0xc54/0x11a0 [ 30.993687] __split_vma+0x5af/0x950 [ 30.994157] ? __pfx___split_vma+0x10/0x10 [ 30.994689] ? find_held_lock+0x2c/0x110 [ 30.995216] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.995781] ? lock_is_held_type+0x9f/0x120 [ 30.996325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.996934] ? mtree_range_walk+0x632/0x900 [ 30.997483] ? mas_walk+0x5c7/0x7c0 [ 30.997955] do_vmi_munmap+0x1f1/0x2b0 [ 30.998446] mmap_region+0x1f9/0x2660 [ 30.998922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.999440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.000151] ? __pfx_lock_acquire+0x10/0x10 [ 31.000691] ? __pfx_mmap_region+0x10/0x10 [ 31.001220] ? security_mmap_addr+0x7d/0xa0 [ 31.001743] ? get_unmapped_area+0x1f5/0x3f0 [ 31.002298] do_mmap+0x854/0xf00 [ 31.002737] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.003243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.003802] ksys_mmap_pgoff+0x3af/0x500 [ 31.004308] do_syscall_64+0x3f/0x90 [ 31.004780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005433] RIP: 0033:0x7fc0e402bd82 [ 31.005885] 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 [ 31.008020] RSP: 002b:00007ffe1059ca68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.008919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0e402bd82 [ 31.009765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0e3465000 [ 31.010614] RBP: 00007fc0e3465000 R08: 0000000000000009 R09: 0000000000001000 [ 31.011485] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b83159af70 [ 31.012333] R13: 00007ffe1059ca80 R14: 00007ffe1059cab0 R15: 00007ffe1059ce10 [ 31.013191] [ 31.013486] [ 31.013703] Allocated by task 213: [ 31.014136] kasan_save_stack+0x22/0x50 [ 31.014643] kasan_set_track+0x25/0x30 [ 31.015185] __kasan_slab_alloc+0x59/0x70 [ 31.015707] kmem_cache_alloc+0x16b/0x370 [ 31.016226] vm_area_dup+0x20/0x160 [ 31.016680] __split_vma+0x170/0x950 [ 31.017147] split_vma+0xc6/0x110 [ 31.017588] mprotect_fixup+0x8d2/0xb30 [ 31.018094] do_mprotect_pkey+0x87e/0xd40 [ 31.018613] __x64_sys_mprotect+0x78/0xc0 [ 31.019155] do_syscall_64+0x3f/0x90 [ 31.019626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020265] [ 31.020479] Freed by task 213: [ 31.020874] kasan_save_stack+0x22/0x50 [ 31.021382] kasan_set_track+0x25/0x30 [ 31.021879] kasan_save_free_info+0x2b/0x50 [ 31.022422] __kasan_slab_free+0x10a/0x190 [ 31.022963] kmem_cache_free+0x10d/0x4d0 [ 31.023475] rcu_core+0x8c8/0x2860 [ 31.023920] __do_softirq+0x1b7/0x7d4 [ 31.024395] [ 31.024609] Last potentially related work creation: [ 31.025194] kasan_save_stack+0x22/0x50 [ 31.025690] __kasan_record_aux_stack+0x8e/0xa0 [ 31.026264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.026905] remove_vma+0x139/0x170 [ 31.027371] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.027926] do_vmi_munmap+0x1f1/0x2b0 [ 31.028413] __vm_munmap+0x138/0x3a0 [ 31.028879] __x64_sys_munmap+0x59/0x80 [ 31.029379] do_syscall_64+0x3f/0x90 [ 31.029853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030491] [ 31.030703] The buggy address belongs to the object at ffff8880102503a0 [ 31.030703] which belongs to the cache vm_area_struct of size 168 [ 31.032175] The buggy address is located 88 bytes inside of [ 31.032175] freed 168-byte region [ffff8880102503a0, ffff888010250448) [ 31.033574] [ 31.033792] The buggy address belongs to the physical page: [ 31.034450] page:00000000c01652b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10250 [ 31.035560] memcg:ffff88800db8ad01 [ 31.035984] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.036628] page_type: 0xffffffff() [ 31.037080] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.038000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db8ad01 [ 31.038902] page dumped because: kasan: bad access detected [ 31.039579] [ 31.039794] Memory state around the buggy address: [ 31.040374] ffff888010250280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.041224] ffff888010250300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.042068] >ffff888010250380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.042913] ^ [ 31.043792] ffff888010250400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.044639] ffff888010250480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.045488] ================================================================== [ 31.046607] Disabling lock debugging due to kernel taint [ 33.428827] BUG: Bad rss-counter state mm:00000000e5fbf3af type:MM_FILEPAGES val:33 [ 33.429590] BUG: Bad rss-counter state mm:00000000e5fbf3af type:MM_ANONPAGES val:22 [ 33.822688] BUG: Bad rss-counter state mm:00000000160ff162 type:MM_FILEPAGES val:33 [ 33.823495] BUG: Bad rss-counter state mm:00000000160ff162 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50509' (ECDSA) to the list of known hosts. 2023/06/20 04:45:08 fuzzer started 2023/06/20 04:45:08 dialing manager at localhost:44161 2023/06/20 04:45:08 checking machine... 2023/06/20 04:45:08 checking revisions... [ 34.524128] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:45:08 testing simple program... [ 34.574453] cgroup: Unknown subsys name 'net' [ 34.623481] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:45:07 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f4219f32fef RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=00007f4219f32fef RBP=00007f4219f32fef RSP=ffff888016fa7500 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f4219f32000 R11=00000000000b6996 R12=ffff888016fa7640 R13=0000000000000000 R14=ffff888016fe0000 R15=0000000000092c40 RIP=ffffffff814c07eb 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 00007f42190ef700 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=00007fa0daae4380 CR3=000000000e94a000 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=2037303a35343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a35343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf951 RBX=ffffffff85dfca8c RCX=ffffffff8180c8d9 RDX=0000000000000000 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff888018e27620 R8 =ffffffff861375e0 R9 =ffff888018e27718 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfca90 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f07a6047900 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=00007f07a6026020 CR3=000000000ed92000 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