syzkaller login: [ 31.101779] BUG: Bad rss-counter state mm:000000006a3bda4b type:MM_FILEPAGES val:33 [ 31.103200] BUG: Bad rss-counter state mm:000000006a3bda4b type:MM_ANONPAGES val:22 [ 31.257999] ================================================================== [ 31.259121] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.260470] Read of size 8 at addr ffff888019450798 by task sshd/221 [ 31.261362] [ 31.261602] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.262566] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.263640] Call Trace: [ 31.263987] [ 31.264311] dump_stack_lvl+0x91/0xf0 [ 31.264857] print_report+0xcc/0x620 [ 31.265396] ? __virt_addr_valid+0x102/0x340 [ 31.266004] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266691] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267331] kasan_report+0xbe/0xf0 [ 31.267818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268490] vma_interval_tree_remove+0xc75/0xec0 [ 31.269140] vma_prepare+0xc54/0x11a0 [ 31.269664] __split_vma+0x5af/0x950 [ 31.270171] ? __pfx___split_vma+0x10/0x10 [ 31.270739] ? find_held_lock+0x2c/0x110 [ 31.271303] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.271907] ? lock_is_held_type+0x9f/0x120 [ 31.272545] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.273213] ? mtree_range_walk+0x632/0x900 [ 31.273813] ? mas_walk+0x5c7/0x7c0 [ 31.274327] do_vmi_munmap+0x1f1/0x2b0 [ 31.274858] mmap_region+0x1f9/0x2660 [ 31.275392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.275961] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.276704] ? __pfx_lock_acquire+0x10/0x10 [ 31.277274] ? __pfx_mmap_region+0x10/0x10 [ 31.277849] ? security_mmap_addr+0x7d/0xa0 [ 31.278421] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279008] do_mmap+0x854/0xf00 [ 31.279459] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.279983] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.280627] ksys_mmap_pgoff+0x3af/0x500 [ 31.281191] do_syscall_64+0x3f/0x90 [ 31.281711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282377] RIP: 0033:0x7fa0ca3a8d82 [ 31.282841] 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 [ 31.285246] RSP: 002b:00007ffdbdda7cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.286257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0ca3a8d82 [ 31.287172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0c97e2000 [ 31.288141] RBP: 00007fa0c97e2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.289096] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edc3582ec0 [ 31.290045] R13: 00007ffdbdda7cd0 R14: 00007ffdbdda7d00 R15: 00007ffdbdda8060 [ 31.290937] [ 31.291265] [ 31.291504] Allocated by task 214: [ 31.291989] kasan_save_stack+0x22/0x50 [ 31.292584] kasan_set_track+0x25/0x30 [ 31.293141] __kasan_slab_alloc+0x59/0x70 [ 31.293738] kmem_cache_alloc+0x16b/0x370 [ 31.294294] vm_area_dup+0x20/0x160 [ 31.294765] __split_vma+0x170/0x950 [ 31.295278] split_vma+0xc6/0x110 [ 31.295782] mprotect_fixup+0x8d2/0xb30 [ 31.296359] do_mprotect_pkey+0x87e/0xd40 [ 31.296941] __x64_sys_mprotect+0x78/0xc0 [ 31.297507] do_syscall_64+0x3f/0x90 [ 31.298030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298693] [ 31.298916] Freed by task 214: [ 31.299349] kasan_save_stack+0x22/0x50 [ 31.299913] kasan_set_track+0x25/0x30 [ 31.300466] kasan_save_free_info+0x2b/0x50 [ 31.301125] __kasan_slab_free+0x10a/0x190 [ 31.301693] kmem_cache_free+0x10d/0x4d0 [ 31.302250] rcu_core+0x8c8/0x2860 [ 31.302735] __do_softirq+0x1b7/0x7d4 [ 31.303269] [ 31.303506] Last potentially related work creation: [ 31.304150] kasan_save_stack+0x22/0x50 [ 31.304665] __kasan_record_aux_stack+0x8e/0xa0 [ 31.305283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306002] remove_vma+0x139/0x170 [ 31.306516] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.307167] do_vmi_munmap+0x1f1/0x2b0 [ 31.307715] __vm_munmap+0x138/0x3a0 [ 31.308250] __x64_sys_munmap+0x59/0x80 [ 31.308819] do_syscall_64+0x3f/0x90 [ 31.309359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310086] [ 31.310328] Second to last potentially related work creation: [ 31.311097] kasan_save_stack+0x22/0x50 [ 31.311668] __kasan_record_aux_stack+0x8e/0xa0 [ 31.312340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.313068] remove_vma+0x139/0x170 [ 31.313570] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.314189] do_vmi_munmap+0x1f1/0x2b0 [ 31.314719] mmap_region+0x1f9/0x2660 [ 31.315233] do_mmap+0x854/0xf00 [ 31.315668] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.316211] ksys_mmap_pgoff+0x3af/0x500 [ 31.316781] do_syscall_64+0x3f/0x90 [ 31.317330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318063] [ 31.318310] The buggy address belongs to the object at ffff888019450740 [ 31.318310] which belongs to the cache vm_area_struct of size 168 [ 31.319849] The buggy address is located 88 bytes inside of [ 31.319849] freed 168-byte region [ffff888019450740, ffff8880194507e8) [ 31.321394] [ 31.321631] The buggy address belongs to the physical page: [ 31.322332] page:00000000fd3ef119 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19450 [ 31.323486] memcg:ffff88800e687401 [ 31.323959] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.324708] page_type: 0xffffffff() [ 31.325221] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365740 dead000000000006 [ 31.326247] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e687401 [ 31.327235] page dumped because: kasan: bad access detected [ 31.327885] [ 31.328131] Memory state around the buggy address: [ 31.328779] ffff888019450680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.329734] ffff888019450700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.330618] >ffff888019450780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.331528] ^ [ 31.332113] ffff888019450800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.333066] ffff888019450880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.334029] ================================================================== [ 31.335089] Disabling lock debugging due to kernel taint [ 34.020914] BUG: Bad rss-counter state mm:00000000d120843a type:MM_FILEPAGES val:33 [ 34.021936] BUG: Bad rss-counter state mm:00000000d120843a type:MM_ANONPAGES val:22 [ 34.488770] BUG: Bad rss-counter state mm:0000000050c36d9d type:MM_FILEPAGES val:33 [ 34.490744] BUG: Bad rss-counter state mm:0000000050c36d9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10610' (ECDSA) to the list of known hosts. 2023/06/20 22:42:34 fuzzer started 2023/06/20 22:42:35 dialing manager at localhost:36067 2023/06/20 22:42:35 checking machine... 2023/06/20 22:42:35 checking revisions... [ 35.185772] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:42:35 testing simple program... [ 35.237328] cgroup: Unknown subsys name 'net' [ 35.286716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f23b31b2366 RCX=0000000000000000 RDX=ffff88800ef551c0 RSI=ffffffff813a0b06 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff888019bd77e0 R8 =0000000000000006 R9 =00007f23b31b2366 R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ef551c0 R15=ffff88800f239e40 RIP=ffffffff813a0b0d RFL=00000287 [--S--PC] 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 00007f23b2cbf900 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=00007ffe5466a000 CR3=000000000f158000 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=ffffffff864b381f RBX=0000000000000001 RCX=ffffffff864b381a RDX=dffffc0000000000 RSI=ffffffff864b381e RDI=ffffffff864b381f RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b381e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130a98 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 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=00007f8c11440190 CR3=000000000a0fa000 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=ac42d96faa46619dfb401de9b0d16587 XMM02=ec2efd57dc4c00df000000000011a268 XMM03=7038ebf928c5cbdc000000000011a338 XMM04=7e3cd159f6661ba900000000000ae988 XMM05=e4cb8bb95a7664b600000000001328b8 XMM06=58926e2bda8b71890000000000131720 XMM07=e042d86d42eb936e00000000001219c0 XMM08=7038ebf928c5cbdc000000000011a338 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000