syzkaller login: [ 31.623778] BUG: Bad rss-counter state mm:00000000ccfa8b99 type:MM_FILEPAGES val:33 [ 31.625021] BUG: Bad rss-counter state mm:00000000ccfa8b99 type:MM_ANONPAGES val:22 [ 31.770596] ================================================================== [ 31.771510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.772464] Read of size 8 at addr ffff88800c773ed8 by task sshd/220 [ 31.773249] [ 31.773471] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.774518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.775494] Call Trace: [ 31.775815] [ 31.776119] dump_stack_lvl+0x91/0xf0 [ 31.776619] print_report+0xcc/0x620 [ 31.777112] ? __virt_addr_valid+0x102/0x340 [ 31.777661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778291] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778907] kasan_report+0xbe/0xf0 [ 31.779373] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780005] vma_interval_tree_remove+0xc75/0xec0 [ 31.780604] vma_prepare+0xc54/0x11a0 [ 31.781096] __split_vma+0x5af/0x950 [ 31.781573] ? __pfx___split_vma+0x10/0x10 [ 31.782108] ? find_held_lock+0x2c/0x110 [ 31.782632] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.783195] ? lock_is_held_type+0x9f/0x120 [ 31.783736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.784342] ? mtree_range_walk+0x632/0x900 [ 31.784919] ? mas_walk+0x5c7/0x7c0 [ 31.785398] do_vmi_munmap+0x1f1/0x2b0 [ 31.785901] mmap_region+0x1f9/0x2660 [ 31.786387] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.786903] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.787608] ? __pfx_lock_acquire+0x10/0x10 [ 31.788139] ? __pfx_mmap_region+0x10/0x10 [ 31.788674] ? security_mmap_addr+0x7d/0xa0 [ 31.789221] ? get_unmapped_area+0x1f5/0x3f0 [ 31.789767] do_mmap+0x854/0xf00 [ 31.790203] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.790699] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.791261] ksys_mmap_pgoff+0x3af/0x500 [ 31.791769] do_syscall_64+0x3f/0x90 [ 31.792247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792912] RIP: 0033:0x7efcbfa8fd82 [ 31.793371] 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 [ 31.795485] RSP: 002b:00007ffe7d6bf858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.796405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcbfa8fd82 [ 31.797261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcbeec9000 [ 31.798113] RBP: 00007efcbeec9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.798958] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556710ee1ec0 [ 31.799808] R13: 00007ffe7d6bf870 R14: 00007ffe7d6bf8a0 R15: 00007ffe7d6bfc00 [ 31.800673] [ 31.800981] [ 31.801194] Allocated by task 213: [ 31.801626] kasan_save_stack+0x22/0x50 [ 31.802136] kasan_set_track+0x25/0x30 [ 31.802647] __kasan_slab_alloc+0x59/0x70 [ 31.803174] kmem_cache_alloc+0x16b/0x370 [ 31.803692] vm_area_dup+0x20/0x160 [ 31.804152] __split_vma+0x170/0x950 [ 31.804624] split_vma+0xc6/0x110 [ 31.805084] mprotect_fixup+0x8d2/0xb30 [ 31.805606] do_mprotect_pkey+0x87e/0xd40 [ 31.806138] __x64_sys_mprotect+0x78/0xc0 [ 31.806660] do_syscall_64+0x3f/0x90 [ 31.807137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.807775] [ 31.807991] Freed by task 213: [ 31.808386] kasan_save_stack+0x22/0x50 [ 31.808894] kasan_set_track+0x25/0x30 [ 31.809388] kasan_save_free_info+0x2b/0x50 [ 31.809918] __kasan_slab_free+0x10a/0x190 [ 31.810446] kmem_cache_free+0x10d/0x4d0 [ 31.810956] rcu_core+0x8c8/0x2860 [ 31.811402] __do_softirq+0x1b7/0x7d4 [ 31.811881] [ 31.812098] Last potentially related work creation: [ 31.812677] kasan_save_stack+0x22/0x50 [ 31.813188] __kasan_record_aux_stack+0x8e/0xa0 [ 31.813762] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.814406] remove_vma+0x139/0x170 [ 31.814855] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.815519] do_vmi_munmap+0x1f1/0x2b0 [ 31.816007] __vm_munmap+0x138/0x3a0 [ 31.816475] __x64_sys_munmap+0x59/0x80 [ 31.816979] do_syscall_64+0x3f/0x90 [ 31.817456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818093] [ 31.818313] Second to last potentially related work creation: [ 31.818989] kasan_save_stack+0x22/0x50 [ 31.819493] __kasan_record_aux_stack+0x8e/0xa0 [ 31.820065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.820702] remove_vma+0x139/0x170 [ 31.821165] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.821714] do_vmi_munmap+0x1f1/0x2b0 [ 31.822201] mmap_region+0x1f9/0x2660 [ 31.822670] do_mmap+0x854/0xf00 [ 31.823102] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.823587] ksys_mmap_pgoff+0x3af/0x500 [ 31.824087] do_syscall_64+0x3f/0x90 [ 31.824562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825218] [ 31.825433] The buggy address belongs to the object at ffff88800c773e80 [ 31.825433] which belongs to the cache vm_area_struct of size 168 [ 31.826898] The buggy address is located 88 bytes inside of [ 31.826898] freed 168-byte region [ffff88800c773e80, ffff88800c773f28) [ 31.828298] [ 31.828514] The buggy address belongs to the physical page: [ 31.829175] page:0000000066335ff4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc773 [ 31.830259] memcg:ffff888013fa8601 [ 31.830695] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.831386] page_type: 0xffffffff() [ 31.831841] raw: 0100000000000200 ffff88800879fc80 ffffea00003bcd40 dead000000000007 [ 31.832776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fa8601 [ 31.833682] page dumped because: kasan: bad access detected [ 31.834340] [ 31.834557] Memory state around the buggy address: [ 31.835129] ffff88800c773d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.835979] ffff88800c773e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.836839] >ffff88800c773e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.837689] ^ [ 31.838410] ffff88800c773f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.839283] ffff88800c773f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.840142] ================================================================== [ 31.841077] Disabling lock debugging due to kernel taint [ 34.551888] BUG: Bad rss-counter state mm:0000000042727f65 type:MM_FILEPAGES val:33 [ 34.552601] BUG: Bad rss-counter state mm:0000000042727f65 type:MM_ANONPAGES val:22 [ 34.968991] BUG: Bad rss-counter state mm:00000000ffe89ee1 type:MM_FILEPAGES val:33 [ 34.970176] BUG: Bad rss-counter state mm:00000000ffe89ee1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50255' (ECDSA) to the list of known hosts. 2023/06/19 20:18:49 fuzzer started 2023/06/19 20:18:49 dialing manager at localhost:44161 2023/06/19 20:18:49 checking machine... 2023/06/19 20:18:49 checking revisions... [ 35.710215] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:18:49 testing simple program... [ 35.762149] cgroup: Unknown subsys name 'net' [ 35.806403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:18:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801608fdf0 RCX=ffffffff812e00d6 RDX=ffffed1002c11fbf RSI=0000000000000004 RDI=ffff88801608fdf0 RBP=1ffff11002cf3f9f RSP=ffff88801679fce0 R8 =0000000000000001 R9 =ffffed1002c11fbe R10=ffff88801608fdf3 R11=00000000000b6996 R12=ffff88801608fdf8 R13=ffff88801608fe00 R14=00000000ffffffff R15=ffff88800d8c3580 RIP=ffffffff8180efb5 RFL=00000246 [---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 00007f0e8f2fd900 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=00007f0e8f8b2650 CR3=000000000e59c000 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=000000000000000000ffff0000000000 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=00007ffd4b286978 CR3=00000000169ca000 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=2038343a38313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a38313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000