syzkaller login: [ 32.103653] BUG: Bad rss-counter state mm:00000000955b1114 type:MM_FILEPAGES val:33 [ 32.105616] BUG: Bad rss-counter state mm:00000000955b1114 type:MM_ANONPAGES val:22 [ 32.274296] ================================================================== [ 32.275230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.276172] Read of size 8 at addr ffff88801030f798 by task sshd/220 [ 32.277062] [ 32.277279] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.278182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.279177] Call Trace: [ 32.279494] [ 32.279778] dump_stack_lvl+0x91/0xf0 [ 32.280274] print_report+0xcc/0x620 [ 32.280769] ? __virt_addr_valid+0x102/0x340 [ 32.281325] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.281957] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.282582] kasan_report+0xbe/0xf0 [ 32.283071] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.283689] vma_interval_tree_remove+0xc75/0xec0 [ 32.284310] vma_prepare+0xc54/0x11a0 [ 32.284795] __split_vma+0x5af/0x950 [ 32.285272] ? __pfx___split_vma+0x10/0x10 [ 32.285804] ? find_held_lock+0x2c/0x110 [ 32.286340] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.286905] ? lock_is_held_type+0x9f/0x120 [ 32.287444] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.288061] ? mtree_range_walk+0x632/0x900 [ 32.288616] ? mas_walk+0x5c7/0x7c0 [ 32.289104] do_vmi_munmap+0x1f1/0x2b0 [ 32.289596] mmap_region+0x1f9/0x2660 [ 32.290105] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.290629] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.291346] ? __pfx_lock_acquire+0x10/0x10 [ 32.291891] ? __pfx_mmap_region+0x10/0x10 [ 32.292443] ? security_mmap_addr+0x7d/0xa0 [ 32.292970] ? get_unmapped_area+0x1f5/0x3f0 [ 32.293523] do_mmap+0x854/0xf00 [ 32.293981] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.294496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.295073] ksys_mmap_pgoff+0x3af/0x500 [ 32.295588] do_syscall_64+0x3f/0x90 [ 32.296070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.296741] RIP: 0033:0x7f2d07061d82 [ 32.297211] 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 [ 32.299353] RSP: 002b:00007ffcd17da3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.300269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d07061d82 [ 32.301125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d0649b000 [ 32.301980] RBP: 00007f2d0649b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.302847] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560126419f70 [ 32.303699] R13: 00007ffcd17da3e0 R14: 00007ffcd17da410 R15: 00007ffcd17da770 [ 32.304570] [ 32.304863] [ 32.305084] Allocated by task 213: [ 32.305517] kasan_save_stack+0x22/0x50 [ 32.306049] kasan_set_track+0x25/0x30 [ 32.306549] __kasan_slab_alloc+0x59/0x70 [ 32.307082] kmem_cache_alloc+0x16b/0x370 [ 32.307599] vm_area_dup+0x20/0x160 [ 32.308067] __split_vma+0x170/0x950 [ 32.308531] split_vma+0xc6/0x110 [ 32.308974] mprotect_fixup+0x8d2/0xb30 [ 32.309488] do_mprotect_pkey+0x87e/0xd40 [ 32.310034] __x64_sys_mprotect+0x78/0xc0 [ 32.310573] do_syscall_64+0x3f/0x90 [ 32.311052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.311694] [ 32.311913] Freed by task 13: [ 32.312302] kasan_save_stack+0x22/0x50 [ 32.312809] kasan_set_track+0x25/0x30 [ 32.313315] kasan_save_free_info+0x2b/0x50 [ 32.313873] __kasan_slab_free+0x10a/0x190 [ 32.314404] kmem_cache_free+0x10d/0x4d0 [ 32.314908] rcu_core+0x8c8/0x2860 [ 32.315359] __do_softirq+0x1b7/0x7d4 [ 32.315843] [ 32.316065] Last potentially related work creation: [ 32.316652] kasan_save_stack+0x22/0x50 [ 32.317161] __kasan_record_aux_stack+0x8e/0xa0 [ 32.317738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.318392] remove_vma+0x139/0x170 [ 32.318843] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.319403] do_vmi_munmap+0x1f1/0x2b0 [ 32.319892] __vm_munmap+0x138/0x3a0 [ 32.320373] __x64_sys_munmap+0x59/0x80 [ 32.320880] do_syscall_64+0x3f/0x90 [ 32.321358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.322022] [ 32.322241] The buggy address belongs to the object at ffff88801030f740 [ 32.322241] which belongs to the cache vm_area_struct of size 168 [ 32.323730] The buggy address is located 88 bytes inside of [ 32.323730] freed 168-byte region [ffff88801030f740, ffff88801030f7e8) [ 32.325151] [ 32.325374] The buggy address belongs to the physical page: [ 32.326055] page:0000000078080192 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1030f [ 32.327142] memcg:ffff88800e01b101 [ 32.327571] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.328221] page_type: 0xffffffff() [ 32.328667] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.329577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e01b101 [ 32.330499] page dumped because: kasan: bad access detected [ 32.331167] [ 32.331386] Memory state around the buggy address: [ 32.331963] ffff88801030f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.332821] ffff88801030f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.333682] >ffff88801030f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.334553] ^ [ 32.335048] ffff88801030f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.335897] ffff88801030f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.336759] ================================================================== [ 32.337949] Disabling lock debugging due to kernel taint [ 34.311943] BUG: Bad rss-counter state mm:0000000086dfbd3b type:MM_FILEPAGES val:33 [ 34.312531] BUG: Bad rss-counter state mm:0000000086dfbd3b type:MM_ANONPAGES val:22 [ 34.675346] BUG: Bad rss-counter state mm:00000000368fb6ca type:MM_FILEPAGES val:33 [ 34.675859] BUG: Bad rss-counter state mm:00000000368fb6ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46527' (ECDSA) to the list of known hosts. 2023/06/19 18:07:05 fuzzer started 2023/06/19 18:07:05 dialing manager at localhost:44161 2023/06/19 18:07:06 checking machine... 2023/06/19 18:07:06 checking revisions... [ 35.295363] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:07:06 testing simple program... [ 35.346999] cgroup: Unknown subsys name 'net' [ 35.397399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:07:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f867000 RCX=ffff88800879fdc0 RDX=ffffea00002cd380 RSI=ffff88800f8672b8 RDI=ffff88800879fc80 RBP=0000000000000000 RSP=ffff88801425fa38 R8 =ffff88800b34ed80 R9 =0000000000000000 R10=ffffea00003e19c0 R11=000000008011000d R12=dffffc0000000000 R13=ffff88801425fa78 R14=ffff88800879fdc0 R15=ffff88800f8672b8 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007fb1b1688900 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=00007ffd151aa000 CR3=0000000015fec000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f9c5bbad018 CR3=000000000cf94000 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=afa8ecb73bb70a9baf4c4425a82e56c2 XMM02=000000000011f940ec2efd57dc4c00df XMM03=0000000000124008339bc05a2e3f84f4 XMM04=d2a6bd4a575460b700000000000ae988 XMM05=19e9129bd510f2350000000000133b90 XMM06=b92451f724cc181700000000001329f8 XMM07=e042d86d42eb936e0000000000124288 XMM08=339bc05a2e3f84f4000000000011f9a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000