syzkaller login: [ 51.710513] BUG: Bad rss-counter state mm:00000000eeb70260 type:MM_FILEPAGES val:33 [ 51.712293] BUG: Bad rss-counter state mm:00000000eeb70260 type:MM_ANONPAGES val:22 [ 51.885968] ================================================================== [ 51.886826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.887709] Read of size 8 at addr ffff88800fd25968 by task sshd/219 [ 51.888505] [ 51.888740] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.889551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.890451] Call Trace: [ 51.890769] [ 51.891035] dump_stack_lvl+0x91/0xf0 [ 51.891510] print_report+0xcc/0x620 [ 51.891973] ? __virt_addr_valid+0x102/0x340 [ 51.892497] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.893081] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.893664] kasan_report+0xbe/0xf0 [ 51.894113] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.894698] vma_interval_tree_remove+0xc75/0xec0 [ 51.895302] vma_prepare+0xc54/0x11a0 [ 51.895774] __split_vma+0x5af/0x950 [ 51.896246] ? __pfx___split_vma+0x10/0x10 [ 51.896772] ? find_held_lock+0x2c/0x110 [ 51.897287] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.897846] ? lock_is_held_type+0x9f/0x120 [ 51.898383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.898979] ? mtree_range_walk+0x632/0x900 [ 51.899536] ? mas_walk+0x5c7/0x7c0 [ 51.900005] do_vmi_munmap+0x1f1/0x2b0 [ 51.900496] mmap_region+0x1f9/0x2660 [ 51.900975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.901481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.902183] ? __pfx_lock_acquire+0x10/0x10 [ 51.902707] ? __pfx_mmap_region+0x10/0x10 [ 51.903244] ? security_mmap_addr+0x7d/0xa0 [ 51.903775] ? get_unmapped_area+0x1f5/0x3f0 [ 51.904322] do_mmap+0x854/0xf00 [ 51.904756] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.905248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.905810] ksys_mmap_pgoff+0x3af/0x500 [ 51.906340] do_syscall_64+0x3f/0x90 [ 51.906823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.907527] RIP: 0033:0x7f86bde63d82 [ 51.908005] 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 [ 51.910171] RSP: 002b:00007fffa72b0008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.911115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86bde63d82 [ 51.911981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86bd29d000 [ 51.912840] RBP: 00007f86bd29d000 R08: 0000000000000009 R09: 0000000000001000 [ 51.913714] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560055363f70 [ 51.914570] R13: 00007fffa72b0020 R14: 00007fffa72b0050 R15: 00007fffa72b03b0 [ 51.915454] [ 51.915749] [ 51.915967] Allocated by task 211: [ 51.916393] kasan_save_stack+0x22/0x50 [ 51.916901] kasan_set_track+0x25/0x30 [ 51.917394] __kasan_slab_alloc+0x59/0x70 [ 51.917922] kmem_cache_alloc+0x16b/0x370 [ 51.918442] vm_area_dup+0x20/0x160 [ 51.918906] __split_vma+0x170/0x950 [ 51.919389] split_vma+0xc6/0x110 [ 51.919838] mprotect_fixup+0x8d2/0xb30 [ 51.920352] do_mprotect_pkey+0x87e/0xd40 [ 51.920881] __x64_sys_mprotect+0x78/0xc0 [ 51.921411] do_syscall_64+0x3f/0x90 [ 51.921895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.922541] [ 51.922756] Freed by task 211: [ 51.923187] kasan_save_stack+0x22/0x50 [ 51.923705] kasan_set_track+0x25/0x30 [ 51.924215] kasan_save_free_info+0x2b/0x50 [ 51.924755] __kasan_slab_free+0x10a/0x190 [ 51.925294] kmem_cache_free+0x10d/0x4d0 [ 51.925805] rcu_core+0x8c8/0x2860 [ 51.926271] __do_softirq+0x1b7/0x7d4 [ 51.926750] [ 51.926966] Last potentially related work creation: [ 51.927566] kasan_save_stack+0x22/0x50 [ 51.928077] __kasan_record_aux_stack+0x8e/0xa0 [ 51.928664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.929313] remove_vma+0x139/0x170 [ 51.929771] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.930339] do_vmi_munmap+0x1f1/0x2b0 [ 51.930843] __vm_munmap+0x138/0x3a0 [ 51.931348] __x64_sys_munmap+0x59/0x80 [ 51.931861] do_syscall_64+0x3f/0x90 [ 51.932345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.932990] [ 51.933208] The buggy address belongs to the object at ffff88800fd25910 [ 51.933208] which belongs to the cache vm_area_struct of size 168 [ 51.934695] The buggy address is located 88 bytes inside of [ 51.934695] freed 168-byte region [ffff88800fd25910, ffff88800fd259b8) [ 51.936113] [ 51.936329] The buggy address belongs to the physical page: [ 51.936989] page:000000009146219a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd25 [ 51.938070] memcg:ffff88800e3a3101 [ 51.938497] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.939152] page_type: 0xffffffff() [ 51.939607] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.940575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3a3101 [ 51.941476] page dumped because: kasan: bad access detected [ 51.942151] [ 51.942374] Memory state around the buggy address: [ 51.942953] ffff88800fd25800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 51.943848] ffff88800fd25880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 51.944707] >ffff88800fd25900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.945562] ^ [ 51.946348] ffff88800fd25980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 51.947232] ffff88800fd25a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.948105] ================================================================== [ 51.949523] Disabling lock debugging due to kernel taint [ 53.918481] BUG: Bad rss-counter state mm:000000000bdbbb1e type:MM_FILEPAGES val:33 [ 53.919706] BUG: Bad rss-counter state mm:000000000bdbbb1e type:MM_ANONPAGES val:22 [ 54.433969] BUG: Bad rss-counter state mm:00000000725710cd type:MM_FILEPAGES val:33 [ 54.434982] BUG: Bad rss-counter state mm:00000000725710cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52995' (ECDSA) to the list of known hosts. 2023/06/19 13:54:50 fuzzer started 2023/06/19 13:54:50 dialing manager at localhost:44161 2023/06/19 13:54:50 checking machine... 2023/06/19 13:54:50 checking revisions... [ 55.152916] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:54:50 testing simple program... [ 55.200782] cgroup: Unknown subsys name 'net' [ 55.240672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:54:37 Registers: info registers vcpu 0 RAX=ffffffff863b22f5 RBX=0000000000000001 RCX=ffffffff863b22f0 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85fa3dec RBP=ffff8880143bf570 RSP=ffff8880143bf4a8 R8 =ffffffff863b22f0 R9 =ffff8880143bf558 R10=0000000000038001 R11=000000000008aa86 R12=ffff8880143bf578 R13=ffff8880143bf560 R14=ffff8880143bf559 R15=ffff8880143bf518 RIP=ffffffff81130a72 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 00007fa5ef81f900 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=00007fa5efdd4650 CR3=000000000d660000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011caf2f RSI=ffff888008e57ef0 RDI=ffff888008e57980 RBP=ffff888008e2d1c0 RSP=ffff888008e578c0 R8 =0000000000000001 R9 =ffff888008e57970 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008e57990 R13=ffff888008e57978 R14=ffff888008e57ef0 R15=ffff888008e57930 RIP=ffffffff81131c60 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 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=00007f5849b77b80 CR3=0000000013ae4000 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=08a89c276a9158987e483110c8bd0db8 XMM02=000000000011de58d59e07bde36eea69 XMM03=000000000011df80ec2efd57dc4c00df XMM04=9a2bffaf0568884d00000000000ae988 XMM05=af102f5f3c9f1e490000000000135b50 XMM06=4fda316b135da52b0000000000134390 XMM07=fb795ef6d657705600000000001241a8 XMM08=2c67c8bc2e329bc3000000000011df80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000