syzkaller login: [ 28.826314] sshd (213) used greatest stack depth: 24128 bytes left [ 28.827053] BUG: Bad rss-counter state mm:00000000f37ed67c type:MM_FILEPAGES val:33 [ 28.827904] BUG: Bad rss-counter state mm:00000000f37ed67c type:MM_ANONPAGES val:22 [ 28.956864] ================================================================== [ 28.958040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.958944] Read of size 8 at addr ffff88800e5f55c8 by task sshd/220 [ 28.959540] [ 28.959711] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.960382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.961153] Call Trace: [ 28.961406] [ 28.961630] dump_stack_lvl+0x91/0xf0 [ 28.962009] print_report+0xcc/0x620 [ 28.962384] ? __virt_addr_valid+0x102/0x340 [ 28.962809] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.963288] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.963766] kasan_report+0xbe/0xf0 [ 28.964138] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.964621] vma_interval_tree_remove+0xc75/0xec0 [ 28.965120] vma_prepare+0xc54/0x11a0 [ 28.965507] __split_vma+0x5af/0x950 [ 28.965871] ? __pfx___split_vma+0x10/0x10 [ 28.966289] ? find_held_lock+0x2c/0x110 [ 28.966700] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.967143] ? lock_is_held_type+0x9f/0x120 [ 28.967567] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.968039] ? mtree_range_walk+0x632/0x900 [ 28.968466] ? mas_walk+0x5c7/0x7c0 [ 28.968832] do_vmi_munmap+0x1f1/0x2b0 [ 28.969235] mmap_region+0x1f9/0x2660 [ 28.969615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.970019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.970583] ? __pfx_lock_acquire+0x10/0x10 [ 28.971000] ? __pfx_mmap_region+0x10/0x10 [ 28.971412] ? security_mmap_addr+0x7d/0xa0 [ 28.971834] ? get_unmapped_area+0x1f5/0x3f0 [ 28.972265] do_mmap+0x854/0xf00 [ 28.972603] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.972988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.973433] ksys_mmap_pgoff+0x3af/0x500 [ 28.973829] do_syscall_64+0x3f/0x90 [ 28.974202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.974707] RIP: 0033:0x7fddf225fd82 [ 28.975067] 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 [ 28.976725] RSP: 002b:00007fff03e3bdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.977441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddf225fd82 [ 28.978102] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddf1699000 [ 28.978761] RBP: 00007fddf1699000 R08: 0000000000000009 R09: 0000000000001000 [ 28.979423] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e1d39fec0 [ 28.980088] R13: 00007fff03e3bdf0 R14: 00007fff03e3be20 R15: 00007fff03e3c180 [ 28.980764] [ 28.980997] [ 28.981181] Allocated by task 213: [ 28.981516] kasan_save_stack+0x22/0x50 [ 28.981910] kasan_set_track+0x25/0x30 [ 28.982299] __kasan_slab_alloc+0x59/0x70 [ 28.982707] kmem_cache_alloc+0x16b/0x370 [ 28.983111] vm_area_dup+0x20/0x160 [ 28.983464] __split_vma+0x170/0x950 [ 28.983834] split_vma+0xc6/0x110 [ 28.984178] mprotect_fixup+0x8d2/0xb30 [ 28.984569] do_mprotect_pkey+0x87e/0xd40 [ 28.984977] __x64_sys_mprotect+0x78/0xc0 [ 28.985393] do_syscall_64+0x3f/0x90 [ 28.985762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.986267] [ 28.986436] Freed by task 213: [ 28.986742] kasan_save_stack+0x22/0x50 [ 28.987137] kasan_set_track+0x25/0x30 [ 28.987523] kasan_save_free_info+0x2b/0x50 [ 28.987935] __kasan_slab_free+0x10a/0x190 [ 28.988353] kmem_cache_free+0x10d/0x4d0 [ 28.988755] rcu_core+0x8c8/0x2860 [ 28.989100] __do_softirq+0x1b7/0x7d4 [ 28.989483] [ 28.989652] Last potentially related work creation: [ 28.990116] kasan_save_stack+0x22/0x50 [ 28.990508] __kasan_record_aux_stack+0x8e/0xa0 [ 28.990953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.991451] remove_vma+0x139/0x170 [ 28.991803] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.992234] do_vmi_munmap+0x1f1/0x2b0 [ 28.992614] __vm_munmap+0x138/0x3a0 [ 28.992976] __x64_sys_munmap+0x59/0x80 [ 28.993377] do_syscall_64+0x3f/0x90 [ 28.993747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.994253] [ 28.994417] Second to last potentially related work creation: [ 28.994956] kasan_save_stack+0x22/0x50 [ 28.995351] __kasan_record_aux_stack+0x8e/0xa0 [ 28.995795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.996297] remove_vma+0x139/0x170 [ 28.996648] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.997090] do_vmi_munmap+0x1f1/0x2b0 [ 28.997475] mmap_region+0x1f9/0x2660 [ 28.997849] do_mmap+0x854/0xf00 [ 28.998184] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.998564] ksys_mmap_pgoff+0x3af/0x500 [ 28.998958] do_syscall_64+0x3f/0x90 [ 28.999326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.999827] [ 28.999995] The buggy address belongs to the object at ffff88800e5f5570 [ 28.999995] which belongs to the cache vm_area_struct of size 168 [ 29.001168] The buggy address is located 88 bytes inside of [ 29.001168] freed 168-byte region [ffff88800e5f5570, ffff88800e5f5618) [ 29.002280] [ 29.002447] The buggy address belongs to the physical page: [ 29.002966] page:00000000224e7577 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5f5 [ 29.003814] memcg:ffff88800d74af01 [ 29.004150] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.004660] page_type: 0xffffffff() [ 29.005011] raw: 0100000000000200 ffff88800879fc80 ffffea00003a96c0 dead000000000004 [ 29.005739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d74af01 [ 29.006449] page dumped because: kasan: bad access detected [ 29.006968] [ 29.007136] Memory state around the buggy address: [ 29.007588] ffff88800e5f5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.008257] ffff88800e5f5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.008937] >ffff88800e5f5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.009601] ^ [ 29.010115] ffff88800e5f5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.010779] ffff88800e5f5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.011449] ================================================================== [ 29.012424] Disabling lock debugging due to kernel taint [ 30.934982] BUG: Bad rss-counter state mm:00000000855b017a type:MM_FILEPAGES val:33 [ 30.936202] BUG: Bad rss-counter state mm:00000000855b017a type:MM_ANONPAGES val:22 [ 31.369063] BUG: Bad rss-counter state mm:000000006b38a0fa type:MM_FILEPAGES val:33 [ 31.369886] BUG: Bad rss-counter state mm:000000006b38a0fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53212' (ECDSA) to the list of known hosts. 2023/06/19 23:43:13 fuzzer started 2023/06/19 23:43:13 dialing manager at localhost:44161 2023/06/19 23:43:13 checking machine... 2023/06/19 23:43:13 checking revisions... [ 32.005358] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:43:13 testing simple program... [ 32.037326] cgroup: Unknown subsys name 'net' [ 32.072145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:43:12 Registers: info registers vcpu 0 RAX=ffffffff810bd033 RBX=0000000000000001 RCX=ffffffff86096756 RDX=dffffc0000000000 RSI=ffff88800e3cf628 RDI=1ffff11001c79ed1 RBP=ffff88800e3cf688 RSP=ffff88800e3cf570 R8 =ffffffff8609675a R9 =ffff88800e3cf670 R10=0000000000038001 R11=0000000000006097 R12=ffff88800e3cf690 R13=ffff88800e3cf678 R14=ffff88800e3cf630 R15=ffff88800e3cf630 RIP=ffffffff8113106f 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 00007fefc718e700 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=00007f452cfc61c0 CR3=0000000019c3e000 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=2032313a33343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00006ac540 RCX=0000000000000000 RDX=ffff88801619d1c0 RSI=ffffffff8170ba8a RDI=ffff88800978d450 RBP=00000000494a801d RSP=ffff88800949f798 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880184710e8 R13=00007f1250279000 R14=ffff88800f2313c0 R15=dffffc0000000000 RIP=ffffffff8170baa9 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 00007f12502c3900 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=00007f125027c008 CR3=000000000cf24000 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