syzkaller login: [ 30.000396] BUG: Bad rss-counter state mm:000000006c75c573 type:MM_FILEPAGES val:33 [ 30.001108] BUG: Bad rss-counter state mm:000000006c75c573 type:MM_ANONPAGES val:22 [ 30.033148] ================================================================== [ 30.033789] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.034441] Read of size 8 at addr ffff88801681c968 by task sshd/220 [ 30.034963] [ 30.035117] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.035712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.036329] Call Trace: [ 30.036530] [ 30.036706] dump_stack_lvl+0x91/0xf0 [ 30.037025] print_report+0xcc/0x620 [ 30.037592] ? __virt_addr_valid+0x102/0x340 [ 30.037971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.038413] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.038829] kasan_report+0xbe/0xf0 [ 30.039153] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.039572] vma_interval_tree_remove+0xc75/0xec0 [ 30.039981] vma_prepare+0xc54/0x11a0 [ 30.040298] __split_vma+0x5af/0x950 [ 30.040613] ? __pfx___split_vma+0x10/0x10 [ 30.040961] ? find_held_lock+0x2c/0x110 [ 30.041298] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.041666] ? lock_is_held_type+0x9f/0x120 [ 30.042080] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.042472] ? mtree_range_walk+0x632/0x900 [ 30.042825] ? mas_walk+0x5c7/0x7c0 [ 30.043124] do_vmi_munmap+0x1f1/0x2b0 [ 30.043431] mmap_region+0x1f9/0x2660 [ 30.043729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.044067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.044524] ? __pfx_lock_acquire+0x10/0x10 [ 30.044858] ? __pfx_mmap_region+0x10/0x10 [ 30.045222] ? security_mmap_addr+0x7d/0xa0 [ 30.045586] ? get_unmapped_area+0x1f5/0x3f0 [ 30.045956] do_mmap+0x854/0xf00 [ 30.046283] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.046619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.047009] ksys_mmap_pgoff+0x3af/0x500 [ 30.047361] do_syscall_64+0x3f/0x90 [ 30.047677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.048113] RIP: 0033:0x7fef52035d82 [ 30.048416] 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 [ 30.049785] RSP: 002b:00007fff74b20428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.050404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef52035d82 [ 30.050959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef5146f000 [ 30.051517] RBP: 00007fef5146f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.052080] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574b3db7ec0 [ 30.052640] R13: 00007fff74b20440 R14: 00007fff74b20470 R15: 00007fff74b207d0 [ 30.053206] [ 30.053403] [ 30.053552] Allocated by task 213: [ 30.053834] kasan_save_stack+0x22/0x50 [ 30.054230] kasan_set_track+0x25/0x30 [ 30.054554] __kasan_slab_alloc+0x59/0x70 [ 30.054897] kmem_cache_alloc+0x16b/0x370 [ 30.055247] vm_area_dup+0x20/0x160 [ 30.055555] __split_vma+0x170/0x950 [ 30.055873] split_vma+0xc6/0x110 [ 30.056175] mprotect_fixup+0x8d2/0xb30 [ 30.056487] do_mprotect_pkey+0x87e/0xd40 [ 30.056810] __x64_sys_mprotect+0x78/0xc0 [ 30.057137] do_syscall_64+0x3f/0x90 [ 30.057437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.057852] [ 30.058023] Freed by task 213: [ 30.058295] kasan_save_stack+0x22/0x50 [ 30.058644] kasan_set_track+0x25/0x30 [ 30.059023] kasan_save_free_info+0x2b/0x50 [ 30.059387] __kasan_slab_free+0x10a/0x190 [ 30.059771] kmem_cache_free+0x10d/0x4d0 [ 30.060110] rcu_core+0x8c8/0x2860 [ 30.060393] __do_softirq+0x1b7/0x7d4 [ 30.060699] [ 30.060850] Last potentially related work creation: [ 30.061281] kasan_save_stack+0x22/0x50 [ 30.061622] __kasan_record_aux_stack+0x8e/0xa0 [ 30.062065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.062472] remove_vma+0x139/0x170 [ 30.062756] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.063122] do_vmi_munmap+0x1f1/0x2b0 [ 30.063442] __vm_munmap+0x138/0x3a0 [ 30.063758] __x64_sys_munmap+0x59/0x80 [ 30.064101] do_syscall_64+0x3f/0x90 [ 30.064466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.064999] [ 30.065162] Second to last potentially related work creation: [ 30.065626] kasan_save_stack+0x22/0x50 [ 30.066009] __kasan_record_aux_stack+0x8e/0xa0 [ 30.066395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.066832] remove_vma+0x139/0x170 [ 30.067142] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.067534] do_vmi_munmap+0x1f1/0x2b0 [ 30.067926] mmap_region+0x1f9/0x2660 [ 30.068250] do_mmap+0x854/0xf00 [ 30.068539] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.068872] ksys_mmap_pgoff+0x3af/0x500 [ 30.069219] do_syscall_64+0x3f/0x90 [ 30.069555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.070025] [ 30.070179] The buggy address belongs to the object at ffff88801681c910 [ 30.070179] which belongs to the cache vm_area_struct of size 168 [ 30.071303] The buggy address is located 88 bytes inside of [ 30.071303] freed 168-byte region [ffff88801681c910, ffff88801681c9b8) [ 30.072274] [ 30.072424] The buggy address belongs to the physical page: [ 30.072879] page:00000000d65ce443 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1681c [ 30.073703] memcg:ffff888018fc4f01 [ 30.074061] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.074519] page_type: 0xffffffff() [ 30.074856] raw: 0100000000000200 ffff8880087a0c80 ffffea000063ffc0 dead000000000007 [ 30.075446] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fc4f01 [ 30.076087] page dumped because: kasan: bad access detected [ 30.076543] [ 30.076693] Memory state around the buggy address: [ 30.077097] ffff88801681c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.077716] ffff88801681c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.078339] >ffff88801681c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.079098] ^ [ 30.079661] ffff88801681c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.080273] ffff88801681ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.080854] ================================================================== [ 30.081615] Disabling lock debugging due to kernel taint [ 31.559251] BUG: Bad rss-counter state mm:0000000019abea03 type:MM_FILEPAGES val:33 [ 31.559973] BUG: Bad rss-counter state mm:0000000019abea03 type:MM_ANONPAGES val:22 [ 31.919077] BUG: Bad rss-counter state mm:00000000ccbccf3d type:MM_FILEPAGES val:33 [ 31.920502] BUG: Bad rss-counter state mm:00000000ccbccf3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41516' (ECDSA) to the list of known hosts. 2023/06/21 08:41:33 fuzzer started 2023/06/21 08:41:34 dialing manager at localhost:36067 2023/06/21 08:41:34 checking machine... 2023/06/21 08:41:34 checking revisions... [ 32.493340] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:41:34 testing simple program... [ 32.528198] cgroup: Unknown subsys name 'net' [ 32.575926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:41:33 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86621100 RCX=ffffffff813a0b19 RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801cdbca00 RIP=ffffffff814c0261 RFL=00000206 [-----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 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=00007f1abb6b2db0 CR3=000000000e052000 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=2033333a31343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a31343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffed1001fa9e08 RCX=0000000000000000 RDX=ffff88800b828000 RSI=ffff88800fd4f060 RDI=ffffffff813ad470 RBP=ffff88800844f780 RSP=ffff88800fd4f040 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed1001a34272 R11=ffffffff81806f71 R12=0000000000092800 R13=0000000000092800 R14=0000000000000000 R15=0000000000092800 RIP=ffffffff813ad71b 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 00007fb0d3f19900 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=00007fb0d3ebe008 CR3=000000000d97a000 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=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