syzkaller login: [ 35.717476] BUG: Bad rss-counter state mm:000000008b70abe8 type:MM_FILEPAGES val:33 [ 35.718989] BUG: Bad rss-counter state mm:000000008b70abe8 type:MM_ANONPAGES val:22 [ 35.897099] ================================================================== [ 35.898221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.899400] Read of size 8 at addr ffff88800c9cbd08 by task sshd/220 [ 35.900218] [ 35.900451] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.901414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.902468] Call Trace: [ 35.902806] [ 35.903115] dump_stack_lvl+0x91/0xf0 [ 35.903630] print_report+0xcc/0x620 [ 35.904152] ? __virt_addr_valid+0x102/0x340 [ 35.904734] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.905390] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.906052] kasan_report+0xbe/0xf0 [ 35.906595] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.907284] vma_interval_tree_remove+0xc75/0xec0 [ 35.907952] vma_prepare+0xc54/0x11a0 [ 35.908487] __split_vma+0x5af/0x950 [ 35.909007] ? __pfx___split_vma+0x10/0x10 [ 35.909593] ? find_held_lock+0x2c/0x110 [ 35.910195] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.910822] ? lock_is_held_type+0x9f/0x120 [ 35.911419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.912099] ? mtree_range_walk+0x632/0x900 [ 35.912704] ? mas_walk+0x5c7/0x7c0 [ 35.913228] do_vmi_munmap+0x1f1/0x2b0 [ 35.913770] mmap_region+0x1f9/0x2660 [ 35.914340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.914907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.915699] ? __pfx_lock_acquire+0x10/0x10 [ 35.916292] ? __pfx_mmap_region+0x10/0x10 [ 35.916880] ? security_mmap_addr+0x7d/0xa0 [ 35.917470] ? get_unmapped_area+0x1f5/0x3f0 [ 35.918076] do_mmap+0x854/0xf00 [ 35.918585] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.919140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.919754] ksys_mmap_pgoff+0x3af/0x500 [ 35.920316] do_syscall_64+0x3f/0x90 [ 35.920840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.921555] RIP: 0033:0x7fd9d5095d82 [ 35.922067] 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 [ 35.924459] RSP: 002b:00007fff519ad028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.925468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9d5095d82 [ 35.926409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9d44cf000 [ 35.927345] RBP: 00007fd9d44cf000 R08: 0000000000000009 R09: 0000000000001000 [ 35.928284] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652e60eed90 [ 35.929232] R13: 00007fff519ad040 R14: 00007fff519ad070 R15: 00007fff519ad3d0 [ 35.930203] [ 35.930526] [ 35.930763] Allocated by task 213: [ 35.931248] kasan_save_stack+0x22/0x50 [ 35.931807] kasan_set_track+0x25/0x30 [ 35.932348] __kasan_slab_alloc+0x59/0x70 [ 35.932926] kmem_cache_alloc+0x16b/0x370 [ 35.933493] vm_area_dup+0x20/0x160 [ 35.933999] __split_vma+0x170/0x950 [ 35.934526] split_vma+0xc6/0x110 [ 35.935012] mprotect_fixup+0x8d2/0xb30 [ 35.935564] do_mprotect_pkey+0x87e/0xd40 [ 35.936141] __x64_sys_mprotect+0x78/0xc0 [ 35.936715] do_syscall_64+0x3f/0x90 [ 35.937249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.937953] [ 35.938205] Freed by task 213: [ 35.938642] kasan_save_stack+0x22/0x50 [ 35.939201] kasan_set_track+0x25/0x30 [ 35.939749] kasan_save_free_info+0x2b/0x50 [ 35.940347] __kasan_slab_free+0x10a/0x190 [ 35.940939] kmem_cache_free+0x10d/0x4d0 [ 35.941498] rcu_core+0x8c8/0x2860 [ 35.941991] __do_softirq+0x1b7/0x7d4 [ 35.942529] [ 35.942770] Last potentially related work creation: [ 35.943422] kasan_save_stack+0x22/0x50 [ 35.943975] __kasan_record_aux_stack+0x8e/0xa0 [ 35.944614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.945327] remove_vma+0x139/0x170 [ 35.945830] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.946466] do_vmi_munmap+0x1f1/0x2b0 [ 35.946997] __vm_munmap+0x138/0x3a0 [ 35.947515] __x64_sys_munmap+0x59/0x80 [ 35.948065] do_syscall_64+0x3f/0x90 [ 35.948586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.949296] [ 35.949533] The buggy address belongs to the object at ffff88800c9cbcb0 [ 35.949533] which belongs to the cache vm_area_struct of size 168 [ 35.951177] The buggy address is located 88 bytes inside of [ 35.951177] freed 168-byte region [ffff88800c9cbcb0, ffff88800c9cbd58) [ 35.952735] [ 35.952973] The buggy address belongs to the physical page: [ 35.953683] page:0000000089762c9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9cb [ 35.954864] memcg:ffff88800e836c01 [ 35.955319] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.956010] page_type: 0xffffffff() [ 35.956500] raw: 0100000000000200 ffff88800879fc80 ffffea00003907c0 dead000000000004 [ 35.957507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e836c01 [ 35.958518] page dumped because: kasan: bad access detected [ 35.959256] [ 35.959494] Memory state around the buggy address: [ 35.960141] ffff88800c9cbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.961089] ffff88800c9cbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.962033] >ffff88800c9cbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.962991] ^ [ 35.963479] ffff88800c9cbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.964428] ffff88800c9cbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.965371] ================================================================== [ 35.966725] Disabling lock debugging due to kernel taint [ 38.102487] BUG: Bad rss-counter state mm:000000004f267baa type:MM_FILEPAGES val:33 [ 38.103396] BUG: Bad rss-counter state mm:000000004f267baa type:MM_ANONPAGES val:22 [ 38.513663] BUG: Bad rss-counter state mm:00000000dd3ac4be type:MM_FILEPAGES val:33 [ 38.514508] BUG: Bad rss-counter state mm:00000000dd3ac4be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44688' (ECDSA) to the list of known hosts. 2023/06/19 12:21:05 fuzzer started 2023/06/19 12:21:05 dialing manager at localhost:44161 2023/06/19 12:21:05 checking machine... 2023/06/19 12:21:05 checking revisions... [ 39.118458] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:21:05 testing simple program... [ 39.165282] cgroup: Unknown subsys name 'net' [ 39.208656] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:21:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff1b91f69f0 CR3=000000000e6a8000 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=f6039d703dd7e18a634880c32da06089 XMM02=000000000011f798ec2efd57dc4c00df XMM03=00000000001260f0491b9d92813d04ba XMM04=022844482e2f701b00000000000ae988 XMM05=19e9129bd510f2350000000000135c70 XMM06=32dfa91244ae1b170000000000134ad8 XMM07=e042d86d42eb936e0000000000126370 XMM08=491b9d92813d04ba000000000011f7f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809911 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff8880147afa50 RDI=ffffffff81809911 RBP=ffff88806cf09af0 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000021eac R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015c58000 R15=ffff88801a860c38 RIP=ffffffff811303b9 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 00007fe96d76b900 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=000055bbb6b09c28 CR3=000000001ab8a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000