syzkaller login: [ 31.102640] BUG: Bad rss-counter state mm:0000000052742c4a type:MM_FILEPAGES val:33 [ 31.103639] BUG: Bad rss-counter state mm:0000000052742c4a type:MM_ANONPAGES val:22 [ 31.264906] ================================================================== [ 31.265804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.266755] Read of size 8 at addr ffff888009a42228 by task sshd/219 [ 31.267517] [ 31.267733] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.268766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.269750] Call Trace: [ 31.270070] [ 31.270393] dump_stack_lvl+0x91/0xf0 [ 31.270905] print_report+0xcc/0x620 [ 31.271387] ? __virt_addr_valid+0x102/0x340 [ 31.271943] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272565] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273187] kasan_report+0xbe/0xf0 [ 31.273664] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274294] vma_interval_tree_remove+0xc75/0xec0 [ 31.274898] vma_prepare+0xc54/0x11a0 [ 31.275379] __split_vma+0x5af/0x950 [ 31.275856] ? __pfx___split_vma+0x10/0x10 [ 31.276386] ? find_held_lock+0x2c/0x110 [ 31.276917] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.277484] ? lock_is_held_type+0x9f/0x120 [ 31.278047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.278672] ? mtree_range_walk+0x632/0x900 [ 31.279226] ? mas_walk+0x5c7/0x7c0 [ 31.279713] do_vmi_munmap+0x1f1/0x2b0 [ 31.280206] mmap_region+0x1f9/0x2660 [ 31.280691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.281207] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.281927] ? __pfx_lock_acquire+0x10/0x10 [ 31.282480] ? __pfx_mmap_region+0x10/0x10 [ 31.283014] ? security_mmap_addr+0x7d/0xa0 [ 31.283551] ? get_unmapped_area+0x1f5/0x3f0 [ 31.284108] do_mmap+0x854/0xf00 [ 31.284549] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.285053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.285619] ksys_mmap_pgoff+0x3af/0x500 [ 31.286130] do_syscall_64+0x3f/0x90 [ 31.286620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287268] RIP: 0033:0x7f10b3822d82 [ 31.287728] 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 [ 31.289838] RSP: 002b:00007ffc56576578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.290780] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10b3822d82 [ 31.291623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10b2c5c000 [ 31.292476] RBP: 00007f10b2c5c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.293336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4645feec0 [ 31.294197] R13: 00007ffc56576590 R14: 00007ffc565765c0 R15: 00007ffc56576920 [ 31.295074] [ 31.295365] [ 31.295584] Allocated by task 212: [ 31.296010] kasan_save_stack+0x22/0x50 [ 31.296519] kasan_set_track+0x25/0x30 [ 31.297008] __kasan_slab_alloc+0x59/0x70 [ 31.297534] kmem_cache_alloc+0x16b/0x370 [ 31.298050] vm_area_dup+0x20/0x160 [ 31.298513] __split_vma+0x170/0x950 [ 31.298980] split_vma+0xc6/0x110 [ 31.299424] mprotect_fixup+0x8d2/0xb30 [ 31.299922] do_mprotect_pkey+0x87e/0xd40 [ 31.300439] __x64_sys_mprotect+0x78/0xc0 [ 31.300961] do_syscall_64+0x3f/0x90 [ 31.301436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302089] [ 31.302325] Freed by task 19: [ 31.302715] kasan_save_stack+0x22/0x50 [ 31.303219] kasan_set_track+0x25/0x30 [ 31.303721] kasan_save_free_info+0x2b/0x50 [ 31.304254] __kasan_slab_free+0x10a/0x190 [ 31.304791] kmem_cache_free+0x10d/0x4d0 [ 31.305299] rcu_core+0x8c8/0x2860 [ 31.305745] __do_softirq+0x1b7/0x7d4 [ 31.306226] [ 31.306459] Last potentially related work creation: [ 31.307052] kasan_save_stack+0x22/0x50 [ 31.307557] __kasan_record_aux_stack+0x8e/0xa0 [ 31.308140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.308784] remove_vma+0x139/0x170 [ 31.309330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.309890] do_vmi_munmap+0x1f1/0x2b0 [ 31.310403] __vm_munmap+0x138/0x3a0 [ 31.310877] __x64_sys_munmap+0x59/0x80 [ 31.311372] do_syscall_64+0x3f/0x90 [ 31.311852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312504] [ 31.312723] The buggy address belongs to the object at ffff888009a421d0 [ 31.312723] which belongs to the cache vm_area_struct of size 168 [ 31.314192] The buggy address is located 88 bytes inside of [ 31.314192] freed 168-byte region [ffff888009a421d0, ffff888009a42278) [ 31.315603] [ 31.315822] The buggy address belongs to the physical page: [ 31.316484] page:000000002796ba5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a42 [ 31.317563] memcg:ffff888016a5e301 [ 31.317999] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.318660] page_type: 0xffffffff() [ 31.319120] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.320046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a5e301 [ 31.320966] page dumped because: kasan: bad access detected [ 31.321625] [ 31.321849] Memory state around the buggy address: [ 31.322446] ffff888009a42100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.323304] ffff888009a42180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.324167] >ffff888009a42200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.325018] ^ [ 31.325582] ffff888009a42280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.326444] ffff888009a42300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.327307] ================================================================== [ 31.328425] Disabling lock debugging due to kernel taint [ 34.027571] BUG: Bad rss-counter state mm:000000000b4f0736 type:MM_FILEPAGES val:33 [ 34.028736] BUG: Bad rss-counter state mm:000000000b4f0736 type:MM_ANONPAGES val:22 [ 34.394989] BUG: Bad rss-counter state mm:00000000eb06a590 type:MM_FILEPAGES val:33 [ 34.395998] BUG: Bad rss-counter state mm:00000000eb06a590 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20085' (ECDSA) to the list of known hosts. 2023/06/21 04:11:26 fuzzer started 2023/06/21 04:11:26 dialing manager at localhost:36067 2023/06/21 04:11:26 checking machine... 2023/06/21 04:11:26 checking revisions... [ 35.113284] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:11:27 testing simple program... [ 35.165192] cgroup: Unknown subsys name 'net' [ 35.211574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:26 Registers: info registers vcpu 0 RAX=0000000000200000 RBX=ffff888017aefc48 RCX=0000000000000000 RDX=1ffff1100184691a RSI=ffffffff8189f2d2 RDI=ffff88800c234938 RBP=ffff888017aef9d0 RSP=ffff888017aef8d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800c2348d0 R13=0000000000000040 R14=0000000000000051 R15=ffff88800c27b438 RIP=ffffffff8189f31c 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 00007fc91e8d5900 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=00007ffcc6195000 CR3=000000000f83a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 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=0000000000000001 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=00007ff9855b8290 CR3=000000000e534000 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=2036323a31313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000