syzkaller login: [ 31.118759] BUG: Bad rss-counter state mm:00000000be2322bb type:MM_FILEPAGES val:33 [ 31.119760] BUG: Bad rss-counter state mm:00000000be2322bb type:MM_ANONPAGES val:22 [ 31.290384] ================================================================== [ 31.291341] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.292440] Read of size 8 at addr ffff888016215310 by task sshd/220 [ 31.293232] [ 31.293465] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.294389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.295395] Call Trace: [ 31.295729] [ 31.296031] dump_stack_lvl+0x91/0xf0 [ 31.296543] print_report+0xcc/0x620 [ 31.297117] ? __virt_addr_valid+0x102/0x340 [ 31.297803] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299335] kasan_report+0xbe/0xf0 [ 31.299906] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300670] vma_interval_tree_remove+0xc75/0xec0 [ 31.301414] vma_prepare+0xc54/0x11a0 [ 31.301958] __split_vma+0x5af/0x950 [ 31.302565] ? __pfx___split_vma+0x10/0x10 [ 31.303147] ? find_held_lock+0x2c/0x110 [ 31.303790] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.304506] ? lock_is_held_type+0x9f/0x120 [ 31.305202] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.305990] ? mtree_range_walk+0x632/0x900 [ 31.306627] ? mas_walk+0x5c7/0x7c0 [ 31.307108] do_vmi_munmap+0x1f1/0x2b0 [ 31.307597] mmap_region+0x1f9/0x2660 [ 31.308087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.308609] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.309331] ? __pfx_lock_acquire+0x10/0x10 [ 31.309865] ? __pfx_mmap_region+0x10/0x10 [ 31.310417] ? security_mmap_addr+0x7d/0xa0 [ 31.310952] ? get_unmapped_area+0x1f5/0x3f0 [ 31.311508] do_mmap+0x854/0xf00 [ 31.311958] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.313025] ksys_mmap_pgoff+0x3af/0x500 [ 31.313532] do_syscall_64+0x3f/0x90 [ 31.314011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314679] RIP: 0033:0x7f5f4b29fd82 [ 31.315139] 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 [ 31.317265] RSP: 002b:00007ffc4eaaba58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.318170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f4b29fd82 [ 31.319017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f4a6d9000 [ 31.319892] RBP: 00007f5f4a6d9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.320740] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b17fc07ec0 [ 31.321599] R13: 00007ffc4eaaba70 R14: 00007ffc4eaabaa0 R15: 00007ffc4eaabe00 [ 31.322505] [ 31.322802] [ 31.323026] Allocated by task 213: [ 31.323466] kasan_save_stack+0x22/0x50 [ 31.323982] kasan_set_track+0x25/0x30 [ 31.324478] __kasan_slab_alloc+0x59/0x70 [ 31.325008] kmem_cache_alloc+0x16b/0x370 [ 31.325548] vm_area_dup+0x20/0x160 [ 31.326007] __split_vma+0x170/0x950 [ 31.326493] split_vma+0xc6/0x110 [ 31.326941] mprotect_fixup+0x8d2/0xb30 [ 31.327439] do_mprotect_pkey+0x87e/0xd40 [ 31.327958] __x64_sys_mprotect+0x78/0xc0 [ 31.328482] do_syscall_64+0x3f/0x90 [ 31.328956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329629] [ 31.329848] Freed by task 213: [ 31.330252] kasan_save_stack+0x22/0x50 [ 31.330764] kasan_set_track+0x25/0x30 [ 31.331257] kasan_save_free_info+0x2b/0x50 [ 31.331785] __kasan_slab_free+0x10a/0x190 [ 31.332325] kmem_cache_free+0x10d/0x4d0 [ 31.332838] rcu_core+0x8c8/0x2860 [ 31.333282] __do_softirq+0x1b7/0x7d4 [ 31.333756] [ 31.333972] Last potentially related work creation: [ 31.334600] kasan_save_stack+0x22/0x50 [ 31.335100] __kasan_record_aux_stack+0x8e/0xa0 [ 31.335675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.336318] remove_vma+0x139/0x170 [ 31.336773] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.337337] do_vmi_munmap+0x1f1/0x2b0 [ 31.337820] __vm_munmap+0x138/0x3a0 [ 31.338295] __x64_sys_munmap+0x59/0x80 [ 31.338805] do_syscall_64+0x3f/0x90 [ 31.339275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339916] [ 31.340131] The buggy address belongs to the object at ffff8880162152b8 [ 31.340131] which belongs to the cache vm_area_struct of size 168 [ 31.341598] The buggy address is located 88 bytes inside of [ 31.341598] freed 168-byte region [ffff8880162152b8, ffff888016215360) [ 31.343028] [ 31.343246] The buggy address belongs to the physical page: [ 31.343913] page:00000000670e6887 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16215 [ 31.345010] memcg:ffff88800de5b801 [ 31.345434] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.346072] page_type: 0xffffffff() [ 31.346527] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.347453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5b801 [ 31.348362] page dumped because: kasan: bad access detected [ 31.349027] [ 31.349245] Memory state around the buggy address: [ 31.349823] ffff888016215200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.350697] ffff888016215280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.351557] >ffff888016215300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.352410] ^ [ 31.352876] ffff888016215380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.353744] ffff888016215400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.354611] ================================================================== [ 31.355694] Disabling lock debugging due to kernel taint [ 33.257153] BUG: Bad rss-counter state mm:0000000065877a57 type:MM_FILEPAGES val:33 [ 33.258743] BUG: Bad rss-counter state mm:0000000065877a57 type:MM_ANONPAGES val:22 [ 33.807296] BUG: Bad rss-counter state mm:00000000b42091b3 type:MM_FILEPAGES val:33 [ 33.808462] BUG: Bad rss-counter state mm:00000000b42091b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33968' (ECDSA) to the list of known hosts. 2023/06/20 17:33:21 fuzzer started 2023/06/20 17:33:21 dialing manager at localhost:36067 2023/06/20 17:33:22 checking machine... 2023/06/20 17:33:22 checking revisions... [ 34.467695] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:33:22 testing simple program... [ 34.510463] cgroup: Unknown subsys name 'net' [ 34.547979] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:33:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffff88800eb277a0 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018351b40 R15=ffff88800fd59508 RIP=ffffffff8113035a RFL=00000216 [----AP-] 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 00007f293e150900 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=00007ffda3c79000 CR3=000000000951a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f815ff80b70 CR3=000000000eb08000 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=2031323a33333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000