syzkaller login: [ 30.719990] BUG: Bad rss-counter state mm:000000005b04ed52 type:MM_FILEPAGES val:33 [ 30.721048] BUG: Bad rss-counter state mm:000000005b04ed52 type:MM_ANONPAGES val:22 [ 30.881594] ================================================================== [ 30.882500] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.883458] Read of size 8 at addr ffff8880161fb058 by task sshd/220 [ 30.884234] [ 30.884459] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.885582] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.886580] Call Trace: [ 30.886920] [ 30.887208] dump_stack_lvl+0x91/0xf0 [ 30.887707] print_report+0xcc/0x620 [ 30.888191] ? __virt_addr_valid+0x102/0x340 [ 30.888753] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889416] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890074] kasan_report+0xbe/0xf0 [ 30.890559] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.891187] vma_interval_tree_remove+0xc75/0xec0 [ 30.891802] vma_prepare+0xc54/0x11a0 [ 30.892294] __split_vma+0x5af/0x950 [ 30.892775] ? __pfx___split_vma+0x10/0x10 [ 30.893349] ? find_held_lock+0x2c/0x110 [ 30.893890] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.894473] ? lock_is_held_type+0x9f/0x120 [ 30.895028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.895644] ? mtree_range_walk+0x632/0x900 [ 30.896211] ? mas_walk+0x5c7/0x7c0 [ 30.896705] do_vmi_munmap+0x1f1/0x2b0 [ 30.897248] mmap_region+0x1f9/0x2660 [ 30.897788] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.898311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.899038] ? __pfx_lock_acquire+0x10/0x10 [ 30.899584] ? __pfx_mmap_region+0x10/0x10 [ 30.900119] ? security_mmap_addr+0x7d/0xa0 [ 30.900664] ? get_unmapped_area+0x1f5/0x3f0 [ 30.901259] do_mmap+0x854/0xf00 [ 30.901728] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.902242] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.902825] ksys_mmap_pgoff+0x3af/0x500 [ 30.903349] do_syscall_64+0x3f/0x90 [ 30.903842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904502] RIP: 0033:0x7f681891ad82 [ 30.905003] 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 [ 30.907163] RSP: 002b:00007ffcb98ef6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.908096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f681891ad82 [ 30.908995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6817d54000 [ 30.909880] RBP: 00007f6817d54000 R08: 0000000000000009 R09: 0000000000001000 [ 30.910737] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637274b4ec0 [ 30.911636] R13: 00007ffcb98ef6f0 R14: 00007ffcb98ef720 R15: 00007ffcb98efa80 [ 30.912529] [ 30.912825] [ 30.913082] Allocated by task 213: [ 30.913531] kasan_save_stack+0x22/0x50 [ 30.914060] kasan_set_track+0x25/0x30 [ 30.914575] __kasan_slab_alloc+0x59/0x70 [ 30.915112] kmem_cache_alloc+0x16b/0x370 [ 30.915634] vm_area_dup+0x20/0x160 [ 30.916108] __split_vma+0x170/0x950 [ 30.916589] split_vma+0xc6/0x110 [ 30.917075] mprotect_fixup+0x8d2/0xb30 [ 30.917622] do_mprotect_pkey+0x87e/0xd40 [ 30.918158] __x64_sys_mprotect+0x78/0xc0 [ 30.918689] do_syscall_64+0x3f/0x90 [ 30.919171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919831] [ 30.920050] Freed by task 213: [ 30.920457] kasan_save_stack+0x22/0x50 [ 30.921008] kasan_set_track+0x25/0x30 [ 30.921515] kasan_save_free_info+0x2b/0x50 [ 30.922085] __kasan_slab_free+0x10a/0x190 [ 30.922636] kmem_cache_free+0x10d/0x4d0 [ 30.923165] rcu_core+0x8c8/0x2860 [ 30.923627] __do_softirq+0x1b7/0x7d4 [ 30.924119] [ 30.924345] Last potentially related work creation: [ 30.924971] kasan_save_stack+0x22/0x50 [ 30.925496] __kasan_record_aux_stack+0x8e/0xa0 [ 30.926125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.926787] remove_vma+0x139/0x170 [ 30.927241] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.927815] do_vmi_munmap+0x1f1/0x2b0 [ 30.928315] __vm_munmap+0x138/0x3a0 [ 30.928800] __x64_sys_munmap+0x59/0x80 [ 30.929348] do_syscall_64+0x3f/0x90 [ 30.929850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.930518] [ 30.930733] The buggy address belongs to the object at ffff8880161fb000 [ 30.930733] which belongs to the cache vm_area_struct of size 168 [ 30.932222] The buggy address is located 88 bytes inside of [ 30.932222] freed 168-byte region [ffff8880161fb000, ffff8880161fb0a8) [ 30.933693] [ 30.933917] The buggy address belongs to the physical page: [ 30.934577] page:00000000df519231 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x161fb [ 30.935672] memcg:ffff888015e5e501 [ 30.936106] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.936760] page_type: 0xffffffff() [ 30.937258] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.938224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e5e501 [ 30.939155] page dumped because: kasan: bad access detected [ 30.939828] [ 30.940050] Memory state around the buggy address: [ 30.940636] ffff8880161faf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.941562] ffff8880161faf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.942432] >ffff8880161fb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.943307] ^ [ 30.944046] ffff8880161fb080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.944946] ffff8880161fb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.945853] ================================================================== [ 30.947050] Disabling lock debugging due to kernel taint [ 32.960606] BUG: Bad rss-counter state mm:0000000005e497af type:MM_FILEPAGES val:33 [ 32.961621] BUG: Bad rss-counter state mm:0000000005e497af type:MM_ANONPAGES val:22 [ 33.440446] BUG: Bad rss-counter state mm:0000000068629e18 type:MM_FILEPAGES val:33 [ 33.441680] BUG: Bad rss-counter state mm:0000000068629e18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4527' (ECDSA) to the list of known hosts. 2023/06/21 07:50:14 fuzzer started 2023/06/21 07:50:15 dialing manager at localhost:36067 2023/06/21 07:50:15 checking machine... 2023/06/21 07:50:15 checking revisions... [ 34.156882] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:50:15 testing simple program... [ 34.225933] cgroup: Unknown subsys name 'net' [ 34.304679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613897a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130b06 RFL=00000297 [--S-APC] 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 00007f2fcbc3c900 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=00007f824ac95650 CR3=0000000008c70000 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=9f640008117b419e864ac62f6248f79d XMM02=000000000011a760eff9b2d0a8fce9cb XMM03=000000000011a8302c67c8bc2e329bc3 XMM04=6ecbba31946862bb00000000000ae988 XMM05=3aa9b604e863c6340000000000132d60 XMM06=a4e2550cc1f183b00000000000131b00 XMM07=fb795ef6d65770560000000000121d48 XMM08=2c67c8bc2e329bc3000000000011a7d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b40b7 RBX=0000000000000001 RCX=ffffffff863b40b2 RDX=0000000000000000 RSI=1ffffffff0c76816 RDI=ffffffff85fa56e0 RBP=ffff88801a297578 RSP=ffff88801a2974b0 R8 =ffffffff863b40b2 R9 =ffff88801a297560 R10=0000000000038001 R11=000000000008ab47 R12=ffff88801a297580 R13=ffff88801a297568 R14=ffff88801a297561 R15=ffff88801a297520 RIP=ffffffff81130a5b RFL=00000213 [----A-C] 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 00007fd214030700 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=00007ffc8720aad8 CR3=000000000da18000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034313a3035 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000