syzkaller login: [ 40.347258] BUG: Bad rss-counter state mm:00000000a8b22e5a type:MM_FILEPAGES val:33 [ 40.347948] BUG: Bad rss-counter state mm:00000000a8b22e5a type:MM_ANONPAGES val:22 [ 40.420932] ================================================================== [ 40.421578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.422195] Read of size 8 at addr ffff88800c538d08 by task sshd/221 [ 40.446471] [ 40.446629] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.447192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.447831] Call Trace: [ 40.448050] [ 40.448247] dump_stack_lvl+0x91/0xf0 [ 40.448583] print_report+0xcc/0x620 [ 40.448912] ? __virt_addr_valid+0x102/0x340 [ 40.449297] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.449736] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.450148] kasan_report+0xbe/0xf0 [ 40.458515] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.458936] vma_interval_tree_remove+0xc75/0xec0 [ 40.459339] vma_prepare+0xc54/0x11a0 [ 40.459662] __split_vma+0x5af/0x950 [ 40.459974] ? __pfx___split_vma+0x10/0x10 [ 40.460361] ? find_held_lock+0x2c/0x110 [ 40.460712] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.461087] ? lock_is_held_type+0x9f/0x120 [ 40.461489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.461898] ? mtree_range_walk+0x632/0x900 [ 40.462271] ? mas_walk+0x5c7/0x7c0 [ 40.478589] do_vmi_munmap+0x1f1/0x2b0 [ 40.478895] mmap_region+0x1f9/0x2660 [ 40.479177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.479477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.479894] ? __pfx_lock_acquire+0x10/0x10 [ 40.480226] ? __pfx_mmap_region+0x10/0x10 [ 40.480582] ? security_mmap_addr+0x7d/0xa0 [ 40.480936] ? get_unmapped_area+0x1f5/0x3f0 [ 40.481295] do_mmap+0x854/0xf00 [ 40.481591] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.481930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.482344] ksys_mmap_pgoff+0x3af/0x500 [ 40.482696] do_syscall_64+0x3f/0x90 [ 40.483026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.483504] RIP: 0033:0x7ff82a2a0d82 [ 40.483814] 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 [ 40.485199] RSP: 002b:00007fff4f2675b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.485804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff82a2a0d82 [ 40.486411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8296da000 [ 40.486974] RBP: 00007ff8296da000 R08: 0000000000000009 R09: 0000000000001000 [ 40.487537] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559398985d90 [ 40.488096] R13: 00007fff4f2675d0 R14: 00007fff4f267600 R15: 00007fff4f267960 [ 40.488681] [ 40.488870] [ 40.489014] Allocated by task 214: [ 40.489298] kasan_save_stack+0x22/0x50 [ 40.489650] kasan_set_track+0x25/0x30 [ 40.489983] __kasan_slab_alloc+0x59/0x70 [ 40.490369] kmem_cache_alloc+0x16b/0x370 [ 40.490715] vm_area_dup+0x20/0x160 [ 40.491023] __split_vma+0x170/0x950 [ 40.491335] split_vma+0xc6/0x110 [ 40.491630] mprotect_fixup+0x8d2/0xb30 [ 40.491970] do_mprotect_pkey+0x87e/0xd40 [ 40.492320] __x64_sys_mprotect+0x78/0xc0 [ 40.492672] do_syscall_64+0x3f/0x90 [ 40.492993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.493424] [ 40.493572] Freed by task 214: [ 40.493836] kasan_save_stack+0x22/0x50 [ 40.494171] kasan_set_track+0x25/0x30 [ 40.494562] kasan_save_free_info+0x2b/0x50 [ 40.494917] __kasan_slab_free+0x10a/0x190 [ 40.495274] kmem_cache_free+0x10d/0x4d0 [ 40.495665] rcu_core+0x8c8/0x2860 [ 40.495969] __do_softirq+0x1b7/0x7d4 [ 40.496298] [ 40.496446] Last potentially related work creation: [ 40.496824] kasan_save_stack+0x22/0x50 [ 40.497165] __kasan_record_aux_stack+0x8e/0xa0 [ 40.497555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.497987] remove_vma+0x139/0x170 [ 40.498309] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.498677] do_vmi_munmap+0x1f1/0x2b0 [ 40.499004] __vm_munmap+0x138/0x3a0 [ 40.499318] __x64_sys_munmap+0x59/0x80 [ 40.499653] do_syscall_64+0x3f/0x90 [ 40.499968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.500389] [ 40.500534] The buggy address belongs to the object at ffff88800c538cb0 [ 40.500534] which belongs to the cache vm_area_struct of size 168 [ 40.501517] The buggy address is located 88 bytes inside of [ 40.501517] freed 168-byte region [ffff88800c538cb0, ffff88800c538d58) [ 40.510609] [ 40.511023] The buggy address belongs to the physical page: [ 40.512440] page:00000000010ca4fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc538 [ 40.514712] memcg:ffff88800d2e3e01 [ 40.515623] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.517077] page_type: 0xffffffff() [ 40.517999] raw: 0100000000000200 ffff88800879fc80 ffffea00003b34c0 dead000000000003 [ 40.519983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e3e01 [ 40.521817] page dumped because: kasan: bad access detected [ 40.539205] [ 40.539565] Memory state around the buggy address: [ 40.540584] ffff88800c538c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.542065] ffff88800c538c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.543592] >ffff88800c538d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.545102] ^ [ 40.545895] ffff88800c538d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.547463] ffff88800c538e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.548934] ================================================================== [ 40.550613] Disabling lock debugging due to kernel taint [ 47.364923] BUG: Bad rss-counter state mm:000000007568f24c type:MM_FILEPAGES val:33 [ 47.365623] BUG: Bad rss-counter state mm:000000007568f24c type:MM_ANONPAGES val:22 [ 48.882511] BUG: Bad rss-counter state mm:00000000b8f41a5c type:MM_FILEPAGES val:33 [ 48.883258] BUG: Bad rss-counter state mm:00000000b8f41a5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8013' (ECDSA) to the list of known hosts. 2023/06/20 08:22:08 fuzzer started 2023/06/20 08:22:08 dialing manager at localhost:44161 2023/06/20 08:22:08 checking machine... 2023/06/20 08:22:08 checking revisions... [ 49.696843] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:22:08 testing simple program... [ 49.741286] cgroup: Unknown subsys name 'net' [ 49.808313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:06 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=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fc0ddaca328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801ca57c00 RCX=0000000000000001 RDX=1ffff1100394ae71 RSI=ffff88801ca57bd0 RDI=ffff88801ca57388 RBP=ffff88801ca50000 RSP=ffff88801ca57308 R8 =0000000000000001 R9 =ffff88801ca573b8 R10=0000000000038001 R11=000000000001e416 R12=ffff88801ca573d8 R13=ffff88801ca573c0 R14=ffff88801ca57bd0 R15=ffff88801ca57378 RIP=ffffffff81131ca6 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 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=00007f0b69d43260 CR3=000000000ca70000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e3562726b62696c2f756e672d78 XMM02=00332e6f732e3562726b62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000