syzkaller login: [ 38.742333] BUG: Bad rss-counter state mm:00000000773c8002 type:MM_FILEPAGES val:33 [ 38.743900] BUG: Bad rss-counter state mm:00000000773c8002 type:MM_ANONPAGES val:22 [ 38.875793] ================================================================== [ 38.876949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.877986] Read of size 8 at addr ffff8880103a9880 by task sshd/219 [ 38.878623] [ 38.878804] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.879534] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.880369] Call Trace: [ 38.880634] [ 38.880921] dump_stack_lvl+0x91/0xf0 [ 38.881446] print_report+0xcc/0x620 [ 38.881882] ? __virt_addr_valid+0x102/0x340 [ 38.882375] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882938] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883586] kasan_report+0xbe/0xf0 [ 38.884095] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884762] vma_interval_tree_remove+0xc75/0xec0 [ 38.885406] vma_prepare+0xc54/0x11a0 [ 38.885930] __split_vma+0x5af/0x950 [ 38.886443] ? __pfx___split_vma+0x10/0x10 [ 38.887021] ? find_held_lock+0x2c/0x110 [ 38.887595] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.888215] ? lock_is_held_type+0x9f/0x120 [ 38.888809] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.889496] ? mtree_range_walk+0x632/0x900 [ 38.890076] ? mas_walk+0x5c7/0x7c0 [ 38.890583] do_vmi_munmap+0x1f1/0x2b0 [ 38.891102] mmap_region+0x1f9/0x2660 [ 38.891604] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.892026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.892637] ? __pfx_lock_acquire+0x10/0x10 [ 38.893092] ? __pfx_mmap_region+0x10/0x10 [ 38.893560] ? security_mmap_addr+0x7d/0xa0 [ 38.894006] ? get_unmapped_area+0x1f5/0x3f0 [ 38.894472] do_mmap+0x854/0xf00 [ 38.894870] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895958] ksys_mmap_pgoff+0x3af/0x500 [ 38.896498] do_syscall_64+0x3f/0x90 [ 38.897005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897711] RIP: 0033:0x7f2515a76d82 [ 38.898191] 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 [ 38.900393] RSP: 002b:00007fff8ee843e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901177] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2515a76d82 [ 38.902062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2514eb0000 [ 38.902910] RBP: 00007f2514eb0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.903782] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e03f47f70 [ 38.904667] R13: 00007fff8ee84400 R14: 00007fff8ee84430 R15: 00007fff8ee84790 [ 38.905529] [ 38.905774] [ 38.905948] Allocated by task 212: [ 38.906300] kasan_save_stack+0x22/0x50 [ 38.906718] kasan_set_track+0x25/0x30 [ 38.907121] __kasan_slab_alloc+0x59/0x70 [ 38.907552] kmem_cache_alloc+0x16b/0x370 [ 38.907976] vm_area_dup+0x20/0x160 [ 38.908350] __split_vma+0x170/0x950 [ 38.908733] split_vma+0xc6/0x110 [ 38.909091] mprotect_fixup+0x8d2/0xb30 [ 38.909526] do_mprotect_pkey+0x87e/0xd40 [ 38.909955] __x64_sys_mprotect+0x78/0xc0 [ 38.910385] do_syscall_64+0x3f/0x90 [ 38.910778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911304] [ 38.911479] Freed by task 212: [ 38.911806] kasan_save_stack+0x22/0x50 [ 38.912226] kasan_set_track+0x25/0x30 [ 38.912634] kasan_save_free_info+0x2b/0x50 [ 38.913100] __kasan_slab_free+0x10a/0x190 [ 38.913545] kmem_cache_free+0x10d/0x4d0 [ 38.913970] rcu_core+0x8c8/0x2860 [ 38.914338] __do_softirq+0x1b7/0x7d4 [ 38.914734] [ 38.914912] Last potentially related work creation: [ 38.915394] kasan_save_stack+0x22/0x50 [ 38.915814] __kasan_record_aux_stack+0x8e/0xa0 [ 38.916287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.916820] remove_vma+0x139/0x170 [ 38.917190] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.917691] do_vmi_munmap+0x1f1/0x2b0 [ 38.918080] __vm_munmap+0x138/0x3a0 [ 38.918440] __x64_sys_munmap+0x59/0x80 [ 38.918823] do_syscall_64+0x3f/0x90 [ 38.919201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919698] [ 38.919861] The buggy address belongs to the object at ffff8880103a9828 [ 38.919861] which belongs to the cache vm_area_struct of size 168 [ 38.921007] The buggy address is located 88 bytes inside of [ 38.921007] freed 168-byte region [ffff8880103a9828, ffff8880103a98d0) [ 38.922115] [ 38.922281] The buggy address belongs to the physical page: [ 38.922792] page:00000000b5f4632c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a9 [ 38.923640] memcg:ffff888016854501 [ 38.923974] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.924519] page_type: 0xffffffff() [ 38.924875] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362500 dead000000000003 [ 38.925591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016854501 [ 38.926299] page dumped because: kasan: bad access detected [ 38.926813] [ 38.926980] Memory state around the buggy address: [ 38.927439] ffff8880103a9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.928099] ffff8880103a9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.928769] >ffff8880103a9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.929448] ^ [ 38.929773] ffff8880103a9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.930461] ffff8880103a9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.931124] ================================================================== [ 38.932196] Disabling lock debugging due to kernel taint [ 40.106869] BUG: Bad rss-counter state mm:000000001ac616d9 type:MM_FILEPAGES val:33 [ 40.107621] BUG: Bad rss-counter state mm:000000001ac616d9 type:MM_ANONPAGES val:22 [ 40.529044] BUG: Bad rss-counter state mm:00000000199cddbd type:MM_FILEPAGES val:33 [ 40.530304] BUG: Bad rss-counter state mm:00000000199cddbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41661' (ECDSA) to the list of known hosts. 2023/06/21 02:53:49 fuzzer started 2023/06/21 02:53:49 dialing manager at localhost:36067 2023/06/21 02:53:49 checking machine... 2023/06/21 02:53:49 checking revisions... [ 41.291475] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:53:49 testing simple program... [ 41.323099] cgroup: Unknown subsys name 'net' [ 41.353586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:53:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f5ae84a6210 CR3=000000000d79c000 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=00000000000000000000000000000000 XMM01=bbc406f2ba005c8912428b718c48ffa0 XMM02=000000000011baa0eff9b2d0a8fce9cb XMM03=000000000011bb702c67c8bc2e329bc3 XMM04=9ad41d817343902600000000000ae988 XMM05=dfcdbad4f1609c3700000000001318b0 XMM06=4761b2a2dc5f1e330000000000130a88 XMM07=e042d86d42eb936e0000000000121f98 XMM08=25871099ad64e637000000000011bb70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=ffffffff81f58c4a RDI=ffff88800e62fc50 RBP=0000000000000000 RSP=ffff88800e62fa88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888008df80d8 R13=0000000000000000 R14=ffff88800bf22808 R15=dffffc0000000000 RIP=ffffffff81f31a54 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 00007f91d9931900 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=00007fff70594000 CR3=000000000e086000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000