syzkaller login: [ 32.098812] BUG: Bad rss-counter state mm:000000005cacaf8f type:MM_FILEPAGES val:33 [ 32.100295] BUG: Bad rss-counter state mm:000000005cacaf8f type:MM_ANONPAGES val:22 [ 32.246002] ================================================================== [ 32.247076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.248185] Read of size 8 at addr ffff88800f29f5c8 by task sshd/221 [ 32.249313] [ 32.249580] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.250602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.251755] Call Trace: [ 32.252132] [ 32.252477] dump_stack_lvl+0x91/0xf0 [ 32.253094] print_report+0xcc/0x620 [ 32.253631] ? __virt_addr_valid+0x102/0x340 [ 32.254184] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.254795] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.255410] kasan_report+0xbe/0xf0 [ 32.255897] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.256516] vma_interval_tree_remove+0xc75/0xec0 [ 32.257135] vma_prepare+0xc54/0x11a0 [ 32.257625] __split_vma+0x5af/0x950 [ 32.258096] ? __pfx___split_vma+0x10/0x10 [ 32.258630] ? find_held_lock+0x2c/0x110 [ 32.259155] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.259719] ? lock_is_held_type+0x9f/0x120 [ 32.260260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.260865] ? mtree_range_walk+0x632/0x900 [ 32.261422] ? mas_walk+0x5c7/0x7c0 [ 32.261903] do_vmi_munmap+0x1f1/0x2b0 [ 32.262397] mmap_region+0x1f9/0x2660 [ 32.262882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.263400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.264117] ? __pfx_lock_acquire+0x10/0x10 [ 32.264658] ? __pfx_mmap_region+0x10/0x10 [ 32.265213] ? security_mmap_addr+0x7d/0xa0 [ 32.265752] ? get_unmapped_area+0x1f5/0x3f0 [ 32.266300] do_mmap+0x854/0xf00 [ 32.266751] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.267245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.267820] ksys_mmap_pgoff+0x3af/0x500 [ 32.268330] do_syscall_64+0x3f/0x90 [ 32.268822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.269472] RIP: 0033:0x7f980b5cbd82 [ 32.269932] 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 [ 32.272051] RSP: 002b:00007ffd13e514c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.272957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f980b5cbd82 [ 32.273816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f980aa05000 [ 32.274663] RBP: 00007f980aa05000 R08: 0000000000000009 R09: 0000000000001000 [ 32.275505] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561af71bcec0 [ 32.276357] R13: 00007ffd13e514e0 R14: 00007ffd13e51510 R15: 00007ffd13e51870 [ 32.277219] [ 32.277517] [ 32.277735] Allocated by task 214: [ 32.278162] kasan_save_stack+0x22/0x50 [ 32.278669] kasan_set_track+0x25/0x30 [ 32.279171] __kasan_slab_alloc+0x59/0x70 [ 32.279707] kmem_cache_alloc+0x16b/0x370 [ 32.280229] vm_area_dup+0x20/0x160 [ 32.280683] __split_vma+0x170/0x950 [ 32.281161] split_vma+0xc6/0x110 [ 32.281611] mprotect_fixup+0x8d2/0xb30 [ 32.282116] do_mprotect_pkey+0x87e/0xd40 [ 32.282643] __x64_sys_mprotect+0x78/0xc0 [ 32.283165] do_syscall_64+0x3f/0x90 [ 32.283645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.284286] [ 32.284508] Freed by task 214: [ 32.284905] kasan_save_stack+0x22/0x50 [ 32.285436] kasan_set_track+0x25/0x30 [ 32.285927] kasan_save_free_info+0x2b/0x50 [ 32.286460] __kasan_slab_free+0x10a/0x190 [ 32.286989] kmem_cache_free+0x10d/0x4d0 [ 32.287499] rcu_core+0x8c8/0x2860 [ 32.287949] __do_softirq+0x1b7/0x7d4 [ 32.288428] [ 32.288654] Last potentially related work creation: [ 32.289245] kasan_save_stack+0x22/0x50 [ 32.289752] __kasan_record_aux_stack+0x8e/0xa0 [ 32.290404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.291046] remove_vma+0x139/0x170 [ 32.291515] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.292081] do_vmi_munmap+0x1f1/0x2b0 [ 32.292571] __vm_munmap+0x138/0x3a0 [ 32.293071] __x64_sys_munmap+0x59/0x80 [ 32.293565] do_syscall_64+0x3f/0x90 [ 32.294040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.294681] [ 32.294895] Second to last potentially related work creation: [ 32.295582] kasan_save_stack+0x22/0x50 [ 32.296091] __kasan_record_aux_stack+0x8e/0xa0 [ 32.296674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.297337] remove_vma+0x139/0x170 [ 32.297798] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.298358] do_vmi_munmap+0x1f1/0x2b0 [ 32.298842] __vm_munmap+0x138/0x3a0 [ 32.299322] __x64_sys_munmap+0x59/0x80 [ 32.299819] do_syscall_64+0x3f/0x90 [ 32.300289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.300929] [ 32.301153] The buggy address belongs to the object at ffff88800f29f570 [ 32.301153] which belongs to the cache vm_area_struct of size 168 [ 32.302633] The buggy address is located 88 bytes inside of [ 32.302633] freed 168-byte region [ffff88800f29f570, ffff88800f29f618) [ 32.304052] [ 32.304268] The buggy address belongs to the physical page: [ 32.304928] page:00000000bcc549d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf29f [ 32.306038] memcg:ffff888015cea901 [ 32.306462] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.307164] page_type: 0xffffffff() [ 32.307620] raw: 0100000000000200 ffff88800879fc80 ffffea0000565300 dead000000000005 [ 32.308543] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015cea901 [ 32.309468] page dumped because: kasan: bad access detected [ 32.310140] [ 32.310354] Memory state around the buggy address: [ 32.310926] ffff88800f29f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.311799] ffff88800f29f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.312656] >ffff88800f29f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.313552] ^ [ 32.314238] ffff88800f29f600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 32.315098] ffff88800f29f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.315962] ================================================================== [ 32.316969] Disabling lock debugging due to kernel taint [ 34.502969] BUG: Bad rss-counter state mm:00000000045026ae type:MM_FILEPAGES val:33 [ 34.503998] BUG: Bad rss-counter state mm:00000000045026ae type:MM_ANONPAGES val:22 [ 35.063269] BUG: Bad rss-counter state mm:0000000040d3876d type:MM_FILEPAGES val:33 [ 35.064426] BUG: Bad rss-counter state mm:0000000040d3876d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38880' (ECDSA) to the list of known hosts. 2023/06/20 04:52:47 fuzzer started 2023/06/20 04:52:47 dialing manager at localhost:44161 2023/06/20 04:52:47 checking machine... 2023/06/20 04:52:47 checking revisions... [ 35.707479] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:52:47 testing simple program... [ 35.763910] cgroup: Unknown subsys name 'net' [ 35.804630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:52:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801ca1ff58 RCX=0000000000000000 RDX=000000000000006e RSI=ffffffff8363fc21 RDI=ffff88801ca1ffc0 RBP=ffff88801ca1ff48 RSP=ffff88801ca1ff20 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801ca1ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363fc44 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 00007f32643e0900 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=00007f3264995650 CR3=000000001a14e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007fb41e881c60 CR3=000000000c992000 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=12e68e847a223dabbb454bdfe3f1c17b XMM02=ec2efd57dc4c00df000000000011f238 XMM03=bbec0a09b85a1aa7000000000011f308 XMM04=a20cdce3b244808500000000000ae988 XMM05=e4cb8bb95a7664b60000000000134658 XMM06=a56d7695b33ca8f500000000001334c0 XMM07=e042d86d42eb936e0000000000123cc8 XMM08=bbec0a09b85a1aa7000000000011f308 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000