syzkaller login: [ 31.087003] BUG: Bad rss-counter state mm:00000000a0d6d3a1 type:MM_FILEPAGES val:33 [ 31.089208] BUG: Bad rss-counter state mm:00000000a0d6d3a1 type:MM_ANONPAGES val:22 [ 31.259298] ================================================================== [ 31.260245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.261200] Read of size 8 at addr ffff8880165ffdf0 by task sshd/220 [ 31.261960] [ 31.262201] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.263224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.264204] Call Trace: [ 31.264520] [ 31.264801] dump_stack_lvl+0x91/0xf0 [ 31.265420] print_report+0xcc/0x620 [ 31.265909] ? __virt_addr_valid+0x102/0x340 [ 31.266473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267103] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267745] kasan_report+0xbe/0xf0 [ 31.268238] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268878] vma_interval_tree_remove+0xc75/0xec0 [ 31.269510] vma_prepare+0xc54/0x11a0 [ 31.270016] __split_vma+0x5af/0x950 [ 31.270517] ? __pfx___split_vma+0x10/0x10 [ 31.271073] ? find_held_lock+0x2c/0x110 [ 31.271612] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.272199] ? lock_is_held_type+0x9f/0x120 [ 31.272762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.273393] ? mtree_range_walk+0x632/0x900 [ 31.273963] ? mas_walk+0x5c7/0x7c0 [ 31.274487] do_vmi_munmap+0x1f1/0x2b0 [ 31.275001] mmap_region+0x1f9/0x2660 [ 31.275505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.276040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.276778] ? __pfx_lock_acquire+0x10/0x10 [ 31.277337] ? __pfx_mmap_region+0x10/0x10 [ 31.277889] ? security_mmap_addr+0x7d/0xa0 [ 31.278456] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279028] do_mmap+0x854/0xf00 [ 31.279487] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.280010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.280589] ksys_mmap_pgoff+0x3af/0x500 [ 31.281115] do_syscall_64+0x3f/0x90 [ 31.281607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282305] RIP: 0033:0x7f942fa0cd82 [ 31.282785] 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 [ 31.285028] RSP: 002b:00007ffdb9fd40e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.285963] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f942fa0cd82 [ 31.286868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f942ee46000 [ 31.287752] RBP: 00007f942ee46000 R08: 0000000000000009 R09: 0000000000001000 [ 31.288639] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564226b1fb20 [ 31.289517] R13: 00007ffdb9fd4100 R14: 00007ffdb9fd4130 R15: 00007ffdb9fd4490 [ 31.290427] [ 31.290730] [ 31.290951] Allocated by task 213: [ 31.291387] kasan_save_stack+0x22/0x50 [ 31.291913] kasan_set_track+0x25/0x30 [ 31.292437] __kasan_slab_alloc+0x59/0x70 [ 31.292976] kmem_cache_alloc+0x16b/0x370 [ 31.293506] vm_area_dup+0x20/0x160 [ 31.293980] __split_vma+0x170/0x950 [ 31.294489] split_vma+0xc6/0x110 [ 31.294942] mprotect_fixup+0x8d2/0xb30 [ 31.295461] do_mprotect_pkey+0x87e/0xd40 [ 31.296003] __x64_sys_mprotect+0x78/0xc0 [ 31.296544] do_syscall_64+0x3f/0x90 [ 31.297041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297709] [ 31.297930] Freed by task 213: [ 31.298350] kasan_save_stack+0x22/0x50 [ 31.298867] kasan_set_track+0x25/0x30 [ 31.299377] kasan_save_free_info+0x2b/0x50 [ 31.299932] __kasan_slab_free+0x10a/0x190 [ 31.300483] kmem_cache_free+0x10d/0x4d0 [ 31.301011] rcu_core+0x8c8/0x2860 [ 31.301470] __do_softirq+0x1b7/0x7d4 [ 31.301964] [ 31.302193] Last potentially related work creation: [ 31.302807] kasan_save_stack+0x22/0x50 [ 31.303327] __kasan_record_aux_stack+0x8e/0xa0 [ 31.303920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.304682] remove_vma+0x139/0x170 [ 31.305162] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.305750] do_vmi_munmap+0x1f1/0x2b0 [ 31.306272] __vm_munmap+0x138/0x3a0 [ 31.306751] __x64_sys_munmap+0x59/0x80 [ 31.307275] do_syscall_64+0x3f/0x90 [ 31.307769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308444] [ 31.308666] The buggy address belongs to the object at ffff8880165ffd98 [ 31.308666] which belongs to the cache vm_area_struct of size 168 [ 31.310221] The buggy address is located 88 bytes inside of [ 31.310221] freed 168-byte region [ffff8880165ffd98, ffff8880165ffe40) [ 31.311701] [ 31.311930] The buggy address belongs to the physical page: [ 31.312629] page:000000003c46d6a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165ff [ 31.313760] memcg:ffff888016c05301 [ 31.314223] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.314899] page_type: 0xffffffff() [ 31.315374] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.316342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c05301 [ 31.317300] page dumped because: kasan: bad access detected [ 31.317983] [ 31.318219] Memory state around the buggy address: [ 31.318821] ffff8880165ffc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.319729] ffff8880165ffd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.320633] >ffff8880165ffd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.321514] ^ [ 31.322362] ffff8880165ffe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.323250] ffff8880165ffe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.324134] ================================================================== [ 31.325156] Disabling lock debugging due to kernel taint [ 34.072851] BUG: Bad rss-counter state mm:00000000ecd5fd9b type:MM_FILEPAGES val:33 [ 34.074361] BUG: Bad rss-counter state mm:00000000ecd5fd9b type:MM_ANONPAGES val:22 [ 34.575189] BUG: Bad rss-counter state mm:00000000066ee173 type:MM_FILEPAGES val:33 [ 34.576432] BUG: Bad rss-counter state mm:00000000066ee173 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62061' (ECDSA) to the list of known hosts. 2023/06/21 01:19:59 fuzzer started 2023/06/21 01:19:59 dialing manager at localhost:36067 2023/06/21 01:19:59 checking machine... 2023/06/21 01:19:59 checking revisions... [ 35.294563] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:19:59 testing simple program... [ 35.354757] cgroup: Unknown subsys name 'net' [ 35.393913] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:59 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8363e063 RDX=00000000000263e0 RSI=00000000000263e0 RDI=ffffffff86582970 RBP=ffff8880164b74f0 RSP=ffff8880164b7428 R8 =0000000000000000 R9 =ffff8880164b74d8 R10=0000000000038001 R11=000000000008aa79 R12=ffff8880164b74f8 R13=ffff8880164b74e0 R14=ffff8880164b74d9 R15=ffff8880164b7498 RIP=ffffffff811307c2 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 00007fa53c5cc900 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=00007ffcf2fcf000 CR3=000000000eea8000 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=00007efe40223d40 CR3=000000000d5ca000 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=9041d5f4e0264da590441fc0485be990 XMM02=2c67c8bc2e329bc3000000000011a040 XMM03=fb795ef6d657705600000000001218e8 XMM04=9e7ead7979075f5500000000000ae988 XMM05=1aacb67cbe7bb0ed00000000001325b8 XMM06=4fda316b135da52b0000000000131658 XMM07=e042d86d42eb936e0000000000121b68 XMM08=65232a7ada91019e000000000011a0a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000