syzkaller login: [ 30.157595] BUG: Bad rss-counter state mm:00000000f09e818e type:MM_FILEPAGES val:33 [ 30.158837] BUG: Bad rss-counter state mm:00000000f09e818e type:MM_ANONPAGES val:22 [ 30.295825] ================================================================== [ 30.296780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.297755] Read of size 8 at addr ffff8880147216b0 by task sshd/220 [ 30.298545] [ 30.298770] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.299683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.300739] Call Trace: [ 30.301080] [ 30.301370] dump_stack_lvl+0x91/0xf0 [ 30.301881] print_report+0xcc/0x620 [ 30.302391] ? __virt_addr_valid+0x102/0x340 [ 30.302954] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.303608] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304255] kasan_report+0xbe/0xf0 [ 30.304772] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305416] vma_interval_tree_remove+0xc75/0xec0 [ 30.306043] vma_prepare+0xc54/0x11a0 [ 30.306535] __split_vma+0x5af/0x950 [ 30.307024] ? __pfx___split_vma+0x10/0x10 [ 30.307584] ? find_held_lock+0x2c/0x110 [ 30.308129] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.308712] ? lock_is_held_type+0x9f/0x120 [ 30.309282] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.309914] ? mtree_range_walk+0x632/0x900 [ 30.310487] ? mas_walk+0x5c7/0x7c0 [ 30.310970] do_vmi_munmap+0x1f1/0x2b0 [ 30.311493] mmap_region+0x1f9/0x2660 [ 30.311990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.312544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.313292] ? __pfx_lock_acquire+0x10/0x10 [ 30.313832] ? __pfx_mmap_region+0x10/0x10 [ 30.314383] ? security_mmap_addr+0x7d/0xa0 [ 30.314919] ? get_unmapped_area+0x1f5/0x3f0 [ 30.315505] do_mmap+0x854/0xf00 [ 30.315954] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.316472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.317078] ksys_mmap_pgoff+0x3af/0x500 [ 30.317603] do_syscall_64+0x3f/0x90 [ 30.318105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.318761] RIP: 0033:0x7fb19da4dd82 [ 30.319260] 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 [ 30.321470] RSP: 002b:00007ffded910d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.322399] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb19da4dd82 [ 30.323279] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb19ce87000 [ 30.324154] RBP: 00007fb19ce87000 R08: 0000000000000009 R09: 0000000000001000 [ 30.325035] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c269243ec0 [ 30.325901] R13: 00007ffded910d60 R14: 00007ffded910d90 R15: 00007ffded9110f0 [ 30.326790] [ 30.327118] [ 30.327336] Allocated by task 213: [ 30.327775] kasan_save_stack+0x22/0x50 [ 30.328306] kasan_set_track+0x25/0x30 [ 30.328817] __kasan_slab_alloc+0x59/0x70 [ 30.329370] kmem_cache_alloc+0x16b/0x370 [ 30.329891] vm_area_dup+0x20/0x160 [ 30.330367] __split_vma+0x170/0x950 [ 30.330841] split_vma+0xc6/0x110 [ 30.331359] mprotect_fixup+0x8d2/0xb30 [ 30.331887] do_mprotect_pkey+0x87e/0xd40 [ 30.332436] __x64_sys_mprotect+0x78/0xc0 [ 30.332985] do_syscall_64+0x3f/0x90 [ 30.333483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.334148] [ 30.334365] Freed by task 213: [ 30.334764] kasan_save_stack+0x22/0x50 [ 30.335313] kasan_set_track+0x25/0x30 [ 30.335820] kasan_save_free_info+0x2b/0x50 [ 30.336381] __kasan_slab_free+0x10a/0x190 [ 30.336929] kmem_cache_free+0x10d/0x4d0 [ 30.337461] rcu_core+0x8c8/0x2860 [ 30.338045] __do_softirq+0x1b7/0x7d4 [ 30.338690] [ 30.338980] Last potentially related work creation: [ 30.339768] kasan_save_stack+0x22/0x50 [ 30.340456] __kasan_record_aux_stack+0x8e/0xa0 [ 30.341244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.342090] remove_vma+0x139/0x170 [ 30.342698] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.343452] do_vmi_munmap+0x1f1/0x2b0 [ 30.343969] __vm_munmap+0x138/0x3a0 [ 30.344465] __x64_sys_munmap+0x59/0x80 [ 30.344976] do_syscall_64+0x3f/0x90 [ 30.345469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.346129] [ 30.346345] The buggy address belongs to the object at ffff888014721658 [ 30.346345] which belongs to the cache vm_area_struct of size 168 [ 30.347860] The buggy address is located 88 bytes inside of [ 30.347860] freed 168-byte region [ffff888014721658, ffff888014721700) [ 30.349324] [ 30.349550] The buggy address belongs to the physical page: [ 30.350218] page:00000000c04f5416 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14721 [ 30.351347] memcg:ffff8880199f1501 [ 30.351780] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.352460] page_type: 0xffffffff() [ 30.352934] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.353875] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199f1501 [ 30.354806] page dumped because: kasan: bad access detected [ 30.355494] [ 30.355710] Memory state around the buggy address: [ 30.356315] ffff888014721580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.357215] ffff888014721600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.358089] >ffff888014721680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.358952] ^ [ 30.359578] ffff888014721700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.360489] ffff888014721780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.361392] ================================================================== [ 30.362352] Disabling lock debugging due to kernel taint [ 32.732806] BUG: Bad rss-counter state mm:000000003bcde769 type:MM_FILEPAGES val:33 [ 32.734379] BUG: Bad rss-counter state mm:000000003bcde769 type:MM_ANONPAGES val:22 [ 33.290078] BUG: Bad rss-counter state mm:00000000764671e2 type:MM_FILEPAGES val:33 [ 33.291322] BUG: Bad rss-counter state mm:00000000764671e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63866' (ECDSA) to the list of known hosts. 2023/06/21 05:46:11 fuzzer started 2023/06/21 05:46:12 dialing manager at localhost:36067 2023/06/21 05:46:12 checking machine... 2023/06/21 05:46:12 checking revisions... [ 33.949070] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:46:12 testing simple program... [ 33.988136] cgroup: Unknown subsys name 'net' [ 34.061205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:46:11 Registers: info registers vcpu 0 RAX=ffffffff8363e261 RBX=000000000000000c RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000e RDI=ffff8880180ef7e8 RBP=dffffc0000000000 RSP=ffff8880180ef700 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000e R13=0000000000092cc0 R14=ffff8880180ef790 R15=0000000000092cc0 RIP=ffffffff813ad656 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 00007f7716a05900 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=00007ffd58365000 CR3=000000001c988000 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=ffff888008c04400 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=00007f6611134380 CR3=000000000d80e000 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=23cd0e13de07c2ae044696cc4eb59a54 XMM02=ec2efd57dc4c00df000000000011b560 XMM03=6cc3c0d29f89de1e000000000011b630 XMM04=4f2283071d7b7f6700000000000ae988 XMM05=19e9129bd510f2350000000000131da0 XMM06=4fda316b135da52b0000000000131c28 XMM07=e042d86d42eb936e00000000001221f0 XMM08=6cc3c0d29f89de1e000000000011b630 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000