syzkaller login: [ 35.263184] BUG: Bad rss-counter state mm:00000000c43bdc02 type:MM_FILEPAGES val:33 [ 35.264543] BUG: Bad rss-counter state mm:00000000c43bdc02 type:MM_ANONPAGES val:22 [ 35.410047] ================================================================== [ 35.411169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.412367] Read of size 8 at addr ffff888019f91310 by task sshd/218 [ 35.413485] [ 35.413751] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.414797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.416189] Call Trace: [ 35.416628] [ 35.417005] dump_stack_lvl+0x91/0xf0 [ 35.417656] print_report+0xcc/0x620 [ 35.418278] ? __virt_addr_valid+0x102/0x340 [ 35.419014] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.419857] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.420682] kasan_report+0xbe/0xf0 [ 35.421316] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.422143] vma_interval_tree_remove+0xc75/0xec0 [ 35.422938] vma_prepare+0xc54/0x11a0 [ 35.423567] __split_vma+0x5af/0x950 [ 35.424182] ? __pfx___split_vma+0x10/0x10 [ 35.424636] ? find_held_lock+0x2c/0x110 [ 35.425077] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.425544] ? lock_is_held_type+0x9f/0x120 [ 35.425975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.426463] ? mtree_range_walk+0x632/0x900 [ 35.426904] ? mas_walk+0x5c7/0x7c0 [ 35.427288] do_vmi_munmap+0x1f1/0x2b0 [ 35.427726] mmap_region+0x1f9/0x2660 [ 35.428125] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.428556] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.429131] ? __pfx_lock_acquire+0x10/0x10 [ 35.429558] ? __pfx_mmap_region+0x10/0x10 [ 35.429980] ? security_mmap_addr+0x7d/0xa0 [ 35.430394] ? get_unmapped_area+0x1f5/0x3f0 [ 35.430840] do_mmap+0x854/0xf00 [ 35.431186] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.431585] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.432043] ksys_mmap_pgoff+0x3af/0x500 [ 35.432454] do_syscall_64+0x3f/0x90 [ 35.432850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.433370] RIP: 0033:0x7f6b25ee8d82 [ 35.433737] 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 [ 35.435438] RSP: 002b:00007ffccd610358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.436182] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b25ee8d82 [ 35.436904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b25322000 [ 35.437611] RBP: 00007f6b25322000 R08: 0000000000000009 R09: 0000000000001000 [ 35.438328] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe63f85980 [ 35.439013] R13: 00007ffccd610370 R14: 00007ffccd6103a0 R15: 00007ffccd610700 [ 35.439717] [ 35.439957] [ 35.440130] Allocated by task 211: [ 35.440478] kasan_save_stack+0x22/0x50 [ 35.440890] kasan_set_track+0x25/0x30 [ 35.441287] __kasan_slab_alloc+0x59/0x70 [ 35.441710] kmem_cache_alloc+0x16b/0x370 [ 35.442122] vm_area_dup+0x20/0x160 [ 35.442491] __split_vma+0x170/0x950 [ 35.442864] split_vma+0xc6/0x110 [ 35.443231] mprotect_fixup+0x8d2/0xb30 [ 35.443634] do_mprotect_pkey+0x87e/0xd40 [ 35.444063] __x64_sys_mprotect+0x78/0xc0 [ 35.444488] do_syscall_64+0x3f/0x90 [ 35.444871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.445396] [ 35.445571] Freed by task 211: [ 35.445889] kasan_save_stack+0x22/0x50 [ 35.446300] kasan_set_track+0x25/0x30 [ 35.446694] kasan_save_free_info+0x2b/0x50 [ 35.447120] __kasan_slab_free+0x10a/0x190 [ 35.447551] kmem_cache_free+0x10d/0x4d0 [ 35.447971] rcu_core+0x8c8/0x2860 [ 35.448368] __do_softirq+0x1b7/0x7d4 [ 35.448785] [ 35.448949] Last potentially related work creation: [ 35.449405] kasan_save_stack+0x22/0x50 [ 35.449817] __kasan_record_aux_stack+0x8e/0xa0 [ 35.450298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.450804] remove_vma+0x139/0x170 [ 35.451154] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.451586] do_vmi_munmap+0x1f1/0x2b0 [ 35.451976] __vm_munmap+0x138/0x3a0 [ 35.452334] __x64_sys_munmap+0x59/0x80 [ 35.452716] do_syscall_64+0x3f/0x90 [ 35.453081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.453573] [ 35.453739] The buggy address belongs to the object at ffff888019f912b8 [ 35.453739] which belongs to the cache vm_area_struct of size 168 [ 35.454957] The buggy address is located 88 bytes inside of [ 35.454957] freed 168-byte region [ffff888019f912b8, ffff888019f91360) [ 35.456050] [ 35.456216] The buggy address belongs to the physical page: [ 35.456806] page:00000000707c4314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f91 [ 35.457777] memcg:ffff88800e38e801 [ 35.458173] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.458777] page_type: 0xffffffff() [ 35.459196] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.460049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e38e801 [ 35.460906] page dumped because: kasan: bad access detected [ 35.461540] [ 35.461737] Memory state around the buggy address: [ 35.462284] ffff888019f91200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.463089] ffff888019f91280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.463905] >ffff888019f91300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.464595] ^ [ 35.464957] ffff888019f91380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.465717] ffff888019f91400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.466405] ================================================================== [ 35.467238] Disabling lock debugging due to kernel taint [ 37.527734] BUG: Bad rss-counter state mm:000000002f959e2a type:MM_FILEPAGES val:33 [ 37.529043] BUG: Bad rss-counter state mm:000000002f959e2a type:MM_ANONPAGES val:22 [ 38.048760] BUG: Bad rss-counter state mm:0000000075675d5a type:MM_FILEPAGES val:33 [ 38.049921] BUG: Bad rss-counter state mm:0000000075675d5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40980' (ECDSA) to the list of known hosts. 2023/06/21 05:52:19 fuzzer started 2023/06/21 05:52:19 dialing manager at localhost:36067 2023/06/21 05:52:19 checking machine... 2023/06/21 05:52:19 checking revisions... [ 38.668792] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:52:19 testing simple program... [ 38.702951] cgroup: Unknown subsys name 'net' [ 38.740529] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffdfffd788 CR3=0000000005482000 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=00007f612bb9451000005574bbb3e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801ccdf938 RCX=0000000000000001 RDX=1ffff1100399bf29 RSI=ffff88801ccdfef0 RDI=ffff88801ccdf948 RBP=ffff88801ccdfef0 RSP=ffff88801ccdf890 R8 =0000000000000001 R9 =ffff88801ccdf978 R10=0000000000038001 R11=000000000008a966 R12=0000000000000008 R13=ffff88801ccd8000 R14=ffff88801ccdfef0 R15=ffff88801ccdf938 RIP=ffffffff81130468 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 00007fbe7c7c7900 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=00007fbe7cd7f0b0 CR3=0000000018242000 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=2039313a32353a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a32353a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000