syzkaller login: [ 30.547323] BUG: Bad rss-counter state mm:00000000fe14e718 type:MM_FILEPAGES val:33 [ 30.548408] BUG: Bad rss-counter state mm:00000000fe14e718 type:MM_ANONPAGES val:22 [ 30.729005] ================================================================== [ 30.730251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.731651] Read of size 8 at addr ffff8880094cb968 by task sshd/220 [ 30.732687] [ 30.732981] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.734162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.735257] Call Trace: [ 30.735606] [ 30.735917] dump_stack_lvl+0x91/0xf0 [ 30.736454] print_report+0xcc/0x620 [ 30.736990] ? __virt_addr_valid+0x102/0x340 [ 30.737602] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738943] kasan_report+0xbe/0xf0 [ 30.739461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740137] vma_interval_tree_remove+0xc75/0xec0 [ 30.740795] vma_prepare+0xc54/0x11a0 [ 30.741338] __split_vma+0x5af/0x950 [ 30.741876] ? __pfx___split_vma+0x10/0x10 [ 30.742452] ? find_held_lock+0x2c/0x110 [ 30.743027] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.743649] ? lock_is_held_type+0x9f/0x120 [ 30.744239] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.744899] ? mtree_range_walk+0x632/0x900 [ 30.745515] ? mas_walk+0x5c7/0x7c0 [ 30.746034] do_vmi_munmap+0x1f1/0x2b0 [ 30.746571] mmap_region+0x1f9/0x2660 [ 30.747093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.747655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.748438] ? __pfx_lock_acquire+0x10/0x10 [ 30.749012] ? __pfx_mmap_region+0x10/0x10 [ 30.749602] ? security_mmap_addr+0x7d/0xa0 [ 30.750187] ? get_unmapped_area+0x1f5/0x3f0 [ 30.750778] do_mmap+0x854/0xf00 [ 30.751337] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.751882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752490] ksys_mmap_pgoff+0x3af/0x500 [ 30.753041] do_syscall_64+0x3f/0x90 [ 30.753594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754305] RIP: 0033:0x7f5246490d82 [ 30.754804] 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 [ 30.757103] RSP: 002b:00007fffe8c325f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5246490d82 [ 30.759014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f52458ca000 [ 30.759935] RBP: 00007f52458ca000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760884] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e21eebd90 [ 30.761843] R13: 00007fffe8c32610 R14: 00007fffe8c32640 R15: 00007fffe8c329a0 [ 30.762772] [ 30.763087] [ 30.763323] Allocated by task 213: [ 30.763788] kasan_save_stack+0x22/0x50 [ 30.764339] kasan_set_track+0x25/0x30 [ 30.764879] __kasan_slab_alloc+0x59/0x70 [ 30.765459] kmem_cache_alloc+0x16b/0x370 [ 30.766020] vm_area_dup+0x20/0x160 [ 30.766516] __split_vma+0x170/0x950 [ 30.767027] split_vma+0xc6/0x110 [ 30.767511] mprotect_fixup+0x8d2/0xb30 [ 30.768055] do_mprotect_pkey+0x87e/0xd40 [ 30.768619] __x64_sys_mprotect+0x78/0xc0 [ 30.769205] do_syscall_64+0x3f/0x90 [ 30.769724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770431] [ 30.770667] Freed by task 13: [ 30.771084] kasan_save_stack+0x22/0x50 [ 30.771704] kasan_set_track+0x25/0x30 [ 30.772244] kasan_save_free_info+0x2b/0x50 [ 30.772830] __kasan_slab_free+0x10a/0x190 [ 30.773429] kmem_cache_free+0x10d/0x4d0 [ 30.773975] rcu_core+0x8c8/0x2860 [ 30.774461] __do_softirq+0x1b7/0x7d4 [ 30.774986] [ 30.775218] Last potentially related work creation: [ 30.775846] kasan_save_stack+0x22/0x50 [ 30.776398] __kasan_record_aux_stack+0x8e/0xa0 [ 30.777021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.777723] remove_vma+0x139/0x170 [ 30.778214] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.778811] do_vmi_munmap+0x1f1/0x2b0 [ 30.779332] __vm_munmap+0x138/0x3a0 [ 30.779837] __x64_sys_munmap+0x59/0x80 [ 30.780368] do_syscall_64+0x3f/0x90 [ 30.780876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781567] [ 30.781798] The buggy address belongs to the object at ffff8880094cb910 [ 30.781798] which belongs to the cache vm_area_struct of size 168 [ 30.783362] The buggy address is located 88 bytes inside of [ 30.783362] freed 168-byte region [ffff8880094cb910, ffff8880094cb9b8) [ 30.784858] [ 30.785089] The buggy address belongs to the physical page: [ 30.785811] page:000000002cd1db2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94cb [ 30.786971] memcg:ffff88801a194601 [ 30.787421] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.788102] page_type: 0xffffffff() [ 30.788581] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.789579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a194601 [ 30.790549] page dumped because: kasan: bad access detected [ 30.791246] [ 30.791476] Memory state around the buggy address: [ 30.792082] ffff8880094cb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.792989] ffff8880094cb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.793887] >ffff8880094cb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.794787] ^ [ 30.795617] ffff8880094cb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.796520] ffff8880094cba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.797430] ================================================================== [ 30.798681] Disabling lock debugging due to kernel taint [ 33.429204] BUG: Bad rss-counter state mm:00000000a0cf7a76 type:MM_FILEPAGES val:33 [ 33.430450] BUG: Bad rss-counter state mm:00000000a0cf7a76 type:MM_ANONPAGES val:22 [ 33.819210] BUG: Bad rss-counter state mm:000000009a57a9c5 type:MM_FILEPAGES val:33 [ 33.820269] BUG: Bad rss-counter state mm:000000009a57a9c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20104' (ECDSA) to the list of known hosts. 2023/06/20 18:25:18 fuzzer started 2023/06/20 18:25:19 dialing manager at localhost:36067 2023/06/20 18:25:19 checking machine... 2023/06/20 18:25:19 checking revisions... [ 34.534846] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:25:19 testing simple program... [ 34.582099] cgroup: Unknown subsys name 'net' [ 34.622954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014485000 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888018297888 RBP=1ffff11003052f0d RSP=ffff888018297860 R8 =0000000000000001 R9 =ffffed1003052f11 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888014485008 R13=ffff888014485010 R14=ffffffff8366b8df R15=ffff88800d91a700 RIP=ffffffff812e0146 RFL=00000046 [---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 00007f2e9952a700 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=00007f481f2c8450 CR3=000000001685c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038313a3532 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383637 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=0000000000001330 RSI=000000000000132f RDI=ffffffff864ee6b0 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307e3 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa6daf18900 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=00007fa6dbaba968 CR3=000000000d91e000 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=6720646572637465733a4d41503d706f 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