syzkaller login: [ 42.547963] BUG: Bad rss-counter state mm:00000000c14818c4 type:MM_FILEPAGES val:33 [ 42.549168] BUG: Bad rss-counter state mm:00000000c14818c4 type:MM_ANONPAGES val:22 [ 42.587877] ================================================================== [ 42.588896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.589886] Read of size 8 at addr ffff88800dd36df0 by task sshd/218 [ 42.590676] [ 42.590896] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.591761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.592748] Call Trace: [ 42.593066] [ 42.593360] dump_stack_lvl+0x91/0xf0 [ 42.593871] print_report+0xcc/0x620 [ 42.594353] ? __virt_addr_valid+0x102/0x340 [ 42.594920] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.595555] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.596167] kasan_report+0xbe/0xf0 [ 42.596658] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.597284] vma_interval_tree_remove+0xc75/0xec0 [ 42.597930] vma_prepare+0xc54/0x11a0 [ 42.598413] __split_vma+0x5af/0x950 [ 42.598890] ? __pfx___split_vma+0x10/0x10 [ 42.599425] ? find_held_lock+0x2c/0x110 [ 42.599953] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.600530] ? lock_is_held_type+0x9f/0x120 [ 42.601068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.601736] ? mtree_range_walk+0x632/0x900 [ 42.602281] ? mas_walk+0x5c7/0x7c0 [ 42.602767] do_vmi_munmap+0x1f1/0x2b0 [ 42.603261] mmap_region+0x1f9/0x2660 [ 42.603761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.604268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.604991] ? __pfx_lock_acquire+0x10/0x10 [ 42.605572] ? __pfx_mmap_region+0x10/0x10 [ 42.606199] ? security_mmap_addr+0x7d/0xa0 [ 42.606865] ? get_unmapped_area+0x1f5/0x3f0 [ 42.607552] do_mmap+0x854/0xf00 [ 42.608089] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.608710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.609410] ksys_mmap_pgoff+0x3af/0x500 [ 42.610029] do_syscall_64+0x3f/0x90 [ 42.610645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.611460] RIP: 0033:0x7f6f7f854d82 [ 42.612037] 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 [ 42.614770] RSP: 002b:00007ffda6b85728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.615901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f7f854d82 [ 42.616964] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f7ec8e000 [ 42.618045] RBP: 00007f6f7ec8e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.619126] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb7c3c5ec0 [ 42.620195] R13: 00007ffda6b85740 R14: 00007ffda6b85770 R15: 00007ffda6b85ad0 [ 42.621264] [ 42.621657] [ 42.621923] Allocated by task 211: [ 42.622463] kasan_save_stack+0x22/0x50 [ 42.623094] kasan_set_track+0x25/0x30 [ 42.623718] __kasan_slab_alloc+0x59/0x70 [ 42.624347] kmem_cache_alloc+0x16b/0x370 [ 42.624973] vm_area_dup+0x20/0x160 [ 42.625562] __split_vma+0x170/0x950 [ 42.626138] split_vma+0xc6/0x110 [ 42.626709] mprotect_fixup+0x8d2/0xb30 [ 42.627325] do_mprotect_pkey+0x87e/0xd40 [ 42.627989] __x64_sys_mprotect+0x78/0xc0 [ 42.628687] do_syscall_64+0x3f/0x90 [ 42.629454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.630253] [ 42.630534] Freed by task 19: [ 42.630999] kasan_save_stack+0x22/0x50 [ 42.631648] kasan_set_track+0x25/0x30 [ 42.632248] kasan_save_free_info+0x2b/0x50 [ 42.632915] __kasan_slab_free+0x10a/0x190 [ 42.633602] kmem_cache_free+0x10d/0x4d0 [ 42.634221] rcu_core+0x8c8/0x2860 [ 42.634771] __do_softirq+0x1b7/0x7d4 [ 42.635343] [ 42.635641] Last potentially related work creation: [ 42.636357] kasan_save_stack+0x22/0x50 [ 42.636991] __kasan_record_aux_stack+0x8e/0xa0 [ 42.637703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.638493] remove_vma+0x139/0x170 [ 42.639041] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.639745] do_vmi_munmap+0x1f1/0x2b0 [ 42.640333] __vm_munmap+0x138/0x3a0 [ 42.640914] __x64_sys_munmap+0x59/0x80 [ 42.641544] do_syscall_64+0x3f/0x90 [ 42.642114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.642903] [ 42.643159] The buggy address belongs to the object at ffff88800dd36d98 [ 42.643159] which belongs to the cache vm_area_struct of size 168 [ 42.644979] The buggy address is located 88 bytes inside of [ 42.644979] freed 168-byte region [ffff88800dd36d98, ffff88800dd36e40) [ 42.646675] [ 42.646926] The buggy address belongs to the physical page: [ 42.647724] page:000000007ece166f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd36 [ 42.649009] memcg:ffff88800e0e0001 [ 42.649586] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.650342] page_type: 0xffffffff() [ 42.650882] raw: 0100000000000200 ffff88800879fc80 ffffea0000399380 dead000000000004 [ 42.651977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e0001 [ 42.653041] page dumped because: kasan: bad access detected [ 42.653838] [ 42.654080] Memory state around the buggy address: [ 42.654752] ffff88800dd36c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.655767] ffff88800dd36d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.656769] >ffff88800dd36d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.657763] ^ [ 42.658690] ffff88800dd36e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.659688] ffff88800dd36e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.660669] ================================================================== [ 42.661802] Disabling lock debugging due to kernel taint [ 44.732545] BUG: Bad rss-counter state mm:00000000c72c2385 type:MM_FILEPAGES val:33 [ 44.734217] BUG: Bad rss-counter state mm:00000000c72c2385 type:MM_ANONPAGES val:22 [ 45.284785] BUG: Bad rss-counter state mm:0000000082b22355 type:MM_FILEPAGES val:33 [ 45.285966] BUG: Bad rss-counter state mm:0000000082b22355 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51344' (ECDSA) to the list of known hosts. 2023/06/20 01:13:56 fuzzer started 2023/06/20 01:13:56 dialing manager at localhost:44161 2023/06/20 01:13:56 checking machine... 2023/06/20 01:13:56 checking revisions... [ 45.912501] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:13:56 testing simple program... [ 45.958813] cgroup: Unknown subsys name 'net' [ 46.010968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:13:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f0eccc1da50 CR3=00000000097be000 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=2035353a33313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a33313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016a6b680 RSI=ffffffff8171103e RDI=0000000000000001 RBP=ffff8880159a7d90 RSP=ffff8880159a7c00 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006455c0 R13=ffff888018f44488 R14=ffff8880159a7db8 R15=ffffea00006455f4 RIP=ffffffff8171103e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe5b7a06900 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=00007fe5b79c6008 CR3=000000000c698000 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