syzkaller login: [ 30.594984] BUG: Bad rss-counter state mm:00000000d2cd2bce type:MM_FILEPAGES val:33 [ 30.595914] BUG: Bad rss-counter state mm:00000000d2cd2bce type:MM_ANONPAGES val:22 [ 30.758828] ================================================================== [ 30.759880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.761002] Read of size 8 at addr ffff888015ecda50 by task sshd/220 [ 30.762164] [ 30.762401] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.763206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.764115] Call Trace: [ 30.764415] [ 30.764684] dump_stack_lvl+0x91/0xf0 [ 30.765161] print_report+0xcc/0x620 [ 30.765617] ? __virt_addr_valid+0x102/0x340 [ 30.766143] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.766743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767340] kasan_report+0xbe/0xf0 [ 30.767804] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768421] vma_interval_tree_remove+0xc75/0xec0 [ 30.769016] vma_prepare+0xc54/0x11a0 [ 30.769485] __split_vma+0x5af/0x950 [ 30.769946] ? __pfx___split_vma+0x10/0x10 [ 30.770477] ? find_held_lock+0x2c/0x110 [ 30.770986] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.771542] ? lock_is_held_type+0x9f/0x120 [ 30.772072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.772661] ? mtree_range_walk+0x632/0x900 [ 30.773222] ? mas_walk+0x5c7/0x7c0 [ 30.773694] do_vmi_munmap+0x1f1/0x2b0 [ 30.774175] mmap_region+0x1f9/0x2660 [ 30.774659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.775169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.775874] ? __pfx_lock_acquire+0x10/0x10 [ 30.776392] ? __pfx_mmap_region+0x10/0x10 [ 30.776906] ? security_mmap_addr+0x7d/0xa0 [ 30.777442] ? get_unmapped_area+0x1f5/0x3f0 [ 30.777985] do_mmap+0x854/0xf00 [ 30.778427] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.778909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.779460] ksys_mmap_pgoff+0x3af/0x500 [ 30.779966] do_syscall_64+0x3f/0x90 [ 30.780434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781100] RIP: 0033:0x7fcb41ec9d82 [ 30.781553] 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 [ 30.783641] RSP: 002b:00007ffd5d5288b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.784530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb41ec9d82 [ 30.785372] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb41303000 [ 30.786208] RBP: 00007fcb41303000 R08: 0000000000000009 R09: 0000000000001000 [ 30.787042] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606bcf00f60 [ 30.787869] R13: 00007ffd5d5288d0 R14: 00007ffd5d528900 R15: 00007ffd5d528c60 [ 30.788703] [ 30.788994] [ 30.789215] Allocated by task 213: [ 30.789626] kasan_save_stack+0x22/0x50 [ 30.790123] kasan_set_track+0x25/0x30 [ 30.790607] __kasan_slab_alloc+0x59/0x70 [ 30.791125] kmem_cache_alloc+0x16b/0x370 [ 30.791635] vm_area_dup+0x20/0x160 [ 30.792084] __split_vma+0x170/0x950 [ 30.792542] split_vma+0xc6/0x110 [ 30.792976] mprotect_fixup+0x8d2/0xb30 [ 30.793495] do_mprotect_pkey+0x87e/0xd40 [ 30.794003] __x64_sys_mprotect+0x78/0xc0 [ 30.794514] do_syscall_64+0x3f/0x90 [ 30.794969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795592] [ 30.795798] Freed by task 13: [ 30.796174] kasan_save_stack+0x22/0x50 [ 30.796669] kasan_set_track+0x25/0x30 [ 30.797159] kasan_save_free_info+0x2b/0x50 [ 30.797683] __kasan_slab_free+0x10a/0x190 [ 30.798216] kmem_cache_free+0x10d/0x4d0 [ 30.798721] rcu_core+0x8c8/0x2860 [ 30.799161] __do_softirq+0x1b7/0x7d4 [ 30.799626] [ 30.799832] Last potentially related work creation: [ 30.800410] kasan_save_stack+0x22/0x50 [ 30.800909] __kasan_record_aux_stack+0x8e/0xa0 [ 30.801480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.802112] remove_vma+0x139/0x170 [ 30.802553] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.803102] do_vmi_munmap+0x1f1/0x2b0 [ 30.803650] __vm_munmap+0x138/0x3a0 [ 30.804112] __x64_sys_munmap+0x59/0x80 [ 30.804605] do_syscall_64+0x3f/0x90 [ 30.805073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805698] [ 30.805910] The buggy address belongs to the object at ffff888015ecd9f8 [ 30.805910] which belongs to the cache vm_area_struct of size 168 [ 30.807355] The buggy address is located 88 bytes inside of [ 30.807355] freed 168-byte region [ffff888015ecd9f8, ffff888015ecdaa0) [ 30.808736] [ 30.808945] The buggy address belongs to the physical page: [ 30.809573] page:00000000eb100705 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ecd [ 30.810615] memcg:ffff88800ffd5e01 [ 30.811020] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.811629] page_type: 0xffffffff() [ 30.812054] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.812930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffd5e01 [ 30.813811] page dumped because: kasan: bad access detected [ 30.814452] [ 30.814699] Memory state around the buggy address: [ 30.815376] ffff888015ecd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.816373] ffff888015ecd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.817381] >ffff888015ecda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.818372] ^ [ 30.819184] ffff888015ecda80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.820177] ffff888015ecdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.821181] ================================================================== [ 30.822233] Disabling lock debugging due to kernel taint [ 32.884081] BUG: Bad rss-counter state mm:00000000ddd24eda type:MM_FILEPAGES val:33 [ 32.885320] BUG: Bad rss-counter state mm:00000000ddd24eda type:MM_ANONPAGES val:22 [ 33.417572] BUG: Bad rss-counter state mm:00000000738a0edf type:MM_FILEPAGES val:33 [ 33.418741] BUG: Bad rss-counter state mm:00000000738a0edf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43202' (ECDSA) to the list of known hosts. 2023/06/19 15:38:31 fuzzer started 2023/06/19 15:38:31 dialing manager at localhost:44161 2023/06/19 15:38:31 checking machine... 2023/06/19 15:38:31 checking revisions... [ 34.051932] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:38:31 testing simple program... [ 34.093194] cgroup: Unknown subsys name 'net' [ 34.140548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:30 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=00007f0b7bc5b690 CR3=000000000d9c2000 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=2030333a38333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186bab8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110031edf26 RSI=ffffffff8186bab8 RDI=ffff888018f6f9a0 RBP=ffff888018f6f970 RSP=ffff888018f6f8d0 R8 =0000000000000001 R9 =ffff888018f6f918 R10=0000000000038001 R11=0000000000038dc4 R12=ffff888018f6f9a0 R13=0000000000000000 R14=ffff88801a1651c0 R15=0000000000000dc0 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007f0bb8416900 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=00007ffc6cb1bfe8 CR3=000000000e612000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000