syzkaller login: [ 63.239324] BUG: Bad rss-counter state mm:00000000929a3861 type:MM_FILEPAGES val:33 [ 63.240341] BUG: Bad rss-counter state mm:00000000929a3861 type:MM_ANONPAGES val:22 [ 63.404446] ================================================================== [ 63.405383] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.406447] Read of size 8 at addr ffff8880102b4a50 by task sshd/220 [ 63.407231] [ 63.407449] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.408538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.409530] Call Trace: [ 63.409860] [ 63.410143] dump_stack_lvl+0x91/0xf0 [ 63.410637] print_report+0xcc/0x620 [ 63.411125] ? __virt_addr_valid+0x102/0x340 [ 63.411676] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.412299] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.412917] kasan_report+0xbe/0xf0 [ 63.413412] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.414037] vma_interval_tree_remove+0xc75/0xec0 [ 63.414642] vma_prepare+0xc54/0x11a0 [ 63.415128] __split_vma+0x5af/0x950 [ 63.415610] ? __pfx___split_vma+0x10/0x10 [ 63.416139] ? find_held_lock+0x2c/0x110 [ 63.416658] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.417259] ? lock_is_held_type+0x9f/0x120 [ 63.417814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.418438] ? mtree_range_walk+0x632/0x900 [ 63.418995] ? mas_walk+0x5c7/0x7c0 [ 63.419479] do_vmi_munmap+0x1f1/0x2b0 [ 63.419980] mmap_region+0x1f9/0x2660 [ 63.420461] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.420981] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.421727] ? __pfx_lock_acquire+0x10/0x10 [ 63.422286] ? __pfx_mmap_region+0x10/0x10 [ 63.422825] ? security_mmap_addr+0x7d/0xa0 [ 63.423361] ? get_unmapped_area+0x1f5/0x3f0 [ 63.423914] do_mmap+0x854/0xf00 [ 63.424353] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.424878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.425489] ksys_mmap_pgoff+0x3af/0x500 [ 63.426034] do_syscall_64+0x3f/0x90 [ 63.426513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.427158] RIP: 0033:0x7f88a5e32d82 [ 63.427623] 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 [ 63.429800] RSP: 002b:00007ffd08c76278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.430735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88a5e32d82 [ 63.431581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88a526c000 [ 63.432436] RBP: 00007f88a526c000 R08: 0000000000000009 R09: 0000000000001000 [ 63.433289] R10: 0000000000000812 R11: 0000000000000206 R12: 000055deb3aa9d90 [ 63.434151] R13: 00007ffd08c76290 R14: 00007ffd08c762c0 R15: 00007ffd08c76620 [ 63.435017] [ 63.435318] [ 63.435532] Allocated by task 213: [ 63.435963] kasan_save_stack+0x22/0x50 [ 63.436479] kasan_set_track+0x25/0x30 [ 63.436982] __kasan_slab_alloc+0x59/0x70 [ 63.437531] kmem_cache_alloc+0x16b/0x370 [ 63.438058] vm_area_dup+0x20/0x160 [ 63.438532] __split_vma+0x170/0x950 [ 63.439013] split_vma+0xc6/0x110 [ 63.439461] mprotect_fixup+0x8d2/0xb30 [ 63.439963] do_mprotect_pkey+0x87e/0xd40 [ 63.440486] __x64_sys_mprotect+0x78/0xc0 [ 63.441009] do_syscall_64+0x3f/0x90 [ 63.441504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.442143] [ 63.442363] Freed by task 213: [ 63.442774] kasan_save_stack+0x22/0x50 [ 63.443279] kasan_set_track+0x25/0x30 [ 63.443778] kasan_save_free_info+0x2b/0x50 [ 63.444316] __kasan_slab_free+0x10a/0x190 [ 63.444856] kmem_cache_free+0x10d/0x4d0 [ 63.445383] rcu_core+0x8c8/0x2860 [ 63.445832] __do_softirq+0x1b7/0x7d4 [ 63.446309] [ 63.446524] Last potentially related work creation: [ 63.447107] kasan_save_stack+0x22/0x50 [ 63.447622] __kasan_record_aux_stack+0x8e/0xa0 [ 63.448205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.448849] remove_vma+0x139/0x170 [ 63.449317] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.449880] do_vmi_munmap+0x1f1/0x2b0 [ 63.450372] __vm_munmap+0x138/0x3a0 [ 63.450845] __x64_sys_munmap+0x59/0x80 [ 63.451355] do_syscall_64+0x3f/0x90 [ 63.451832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.452474] [ 63.452695] Second to last potentially related work creation: [ 63.453406] kasan_save_stack+0x22/0x50 [ 63.453908] __kasan_record_aux_stack+0x8e/0xa0 [ 63.454483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.455124] remove_vma+0x139/0x170 [ 63.455575] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.456138] do_vmi_munmap+0x1f1/0x2b0 [ 63.456633] mmap_region+0x1f9/0x2660 [ 63.457126] do_mmap+0x854/0xf00 [ 63.457562] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.458054] ksys_mmap_pgoff+0x3af/0x500 [ 63.458554] do_syscall_64+0x3f/0x90 [ 63.459031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.459685] [ 63.459902] The buggy address belongs to the object at ffff8880102b49f8 [ 63.459902] which belongs to the cache vm_area_struct of size 168 [ 63.461388] The buggy address is located 88 bytes inside of [ 63.461388] freed 168-byte region [ffff8880102b49f8, ffff8880102b4aa0) [ 63.462813] [ 63.463029] The buggy address belongs to the physical page: [ 63.463691] page:00000000d054120c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b4 [ 63.464788] memcg:ffff88801451b501 [ 63.465226] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.465880] page_type: 0xffffffff() [ 63.466335] raw: 0100000000000200 ffff88800879fc80 ffffea00003d6e80 dead000000000004 [ 63.467264] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801451b501 [ 63.468191] page dumped because: kasan: bad access detected [ 63.468861] [ 63.469084] Memory state around the buggy address: [ 63.469689] ffff8880102b4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.470558] ffff8880102b4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 63.471421] >ffff8880102b4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.472280] ^ [ 63.472989] ffff8880102b4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 63.473849] ffff8880102b4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.474706] ================================================================== [ 63.475695] Disabling lock debugging due to kernel taint [ 65.497623] BUG: Bad rss-counter state mm:00000000f925457e type:MM_FILEPAGES val:33 [ 65.498723] BUG: Bad rss-counter state mm:00000000f925457e type:MM_ANONPAGES val:22 [ 65.975562] BUG: Bad rss-counter state mm:00000000aae4b886 type:MM_FILEPAGES val:33 [ 65.976591] BUG: Bad rss-counter state mm:00000000aae4b886 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53928' (ECDSA) to the list of known hosts. 2023/06/19 18:13:39 fuzzer started 2023/06/19 18:13:39 dialing manager at localhost:44161 2023/06/19 18:13:39 checking machine... 2023/06/19 18:13:39 checking revisions... [ 66.723939] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:13:40 testing simple program... [ 66.775075] cgroup: Unknown subsys name 'net' [ 66.836849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:13:07 Registers: info registers vcpu 0 RAX=000000000000002c RBX=00000000000001e0 RCX=0000556a3bc19010 RDX=000000000000001c RSI=0000000000000004 RDI=0000556a3bc55f70 RBP=00007fbd4a388b80 RSP=00007ffe4b43f010 R8 =0000556a3bc549e0 R9 =00007fbd4a388be0 R10=000000000000006f R11=0000000000000202 R12=0000556a3bc55f60 R13=0000000000000000 R14=00007fbd49db1b22 R15=00007fbd49dd6710 RIP=00007fbd4a250bf0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbd49dd6900 00000000 00000000 GS =0000 0000000000000000 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=00007fbd4a38b650 CR3=0000000016e24000 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=00000000000000000000000000000000 XMM01=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffff1914868 CR3=000000000fd96000 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=2039333a33313a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a33313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000