syzkaller login: [ 30.551740] BUG: Bad rss-counter state mm:00000000c83b1990 type:MM_FILEPAGES val:33 [ 30.552844] BUG: Bad rss-counter state mm:00000000c83b1990 type:MM_ANONPAGES val:22 [ 30.692427] ================================================================== [ 30.693303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.694179] Read of size 8 at addr ffff888015feb968 by task sshd/219 [ 30.694894] [ 30.695102] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.696052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.697050] Call Trace: [ 30.697375] [ 30.697690] dump_stack_lvl+0x91/0xf0 [ 30.698190] print_report+0xcc/0x620 [ 30.698686] ? __virt_addr_valid+0x102/0x340 [ 30.699245] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.699884] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.700513] kasan_report+0xbe/0xf0 [ 30.701001] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.701623] vma_interval_tree_remove+0xc75/0xec0 [ 30.702233] vma_prepare+0xc54/0x11a0 [ 30.702724] __split_vma+0x5af/0x950 [ 30.703202] ? __pfx___split_vma+0x10/0x10 [ 30.703747] ? find_held_lock+0x2c/0x110 [ 30.704274] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.704844] ? lock_is_held_type+0x9f/0x120 [ 30.705391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.706002] ? mtree_range_walk+0x632/0x900 [ 30.706561] ? mas_walk+0x5c7/0x7c0 [ 30.707048] do_vmi_munmap+0x1f1/0x2b0 [ 30.707572] mmap_region+0x1f9/0x2660 [ 30.708060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.708574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.709287] ? __pfx_lock_acquire+0x10/0x10 [ 30.709822] ? __pfx_mmap_region+0x10/0x10 [ 30.710355] ? security_mmap_addr+0x7d/0xa0 [ 30.710884] ? get_unmapped_area+0x1f5/0x3f0 [ 30.711454] do_mmap+0x854/0xf00 [ 30.711909] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.712419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.713000] ksys_mmap_pgoff+0x3af/0x500 [ 30.713526] do_syscall_64+0x3f/0x90 [ 30.714021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714685] RIP: 0033:0x7fe47d113d82 [ 30.715157] 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 [ 30.717349] RSP: 002b:00007ffd315e3d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.718275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe47d113d82 [ 30.719158] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe47c54d000 [ 30.720056] RBP: 00007fe47c54d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.720933] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ee6305b20 [ 30.721824] R13: 00007ffd315e3d60 R14: 00007ffd315e3d90 R15: 00007ffd315e40f0 [ 30.722716] [ 30.723018] [ 30.723242] Allocated by task 212: [ 30.723702] kasan_save_stack+0x22/0x50 [ 30.724217] kasan_set_track+0x25/0x30 [ 30.724720] __kasan_slab_alloc+0x59/0x70 [ 30.725260] kmem_cache_alloc+0x16b/0x370 [ 30.725794] vm_area_dup+0x20/0x160 [ 30.726259] __split_vma+0x170/0x950 [ 30.726735] split_vma+0xc6/0x110 [ 30.727187] mprotect_fixup+0x8d2/0xb30 [ 30.727721] do_mprotect_pkey+0x87e/0xd40 [ 30.728255] __x64_sys_mprotect+0x78/0xc0 [ 30.728801] do_syscall_64+0x3f/0x90 [ 30.729288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729953] [ 30.730176] Freed by task 212: [ 30.730587] kasan_save_stack+0x22/0x50 [ 30.731104] kasan_set_track+0x25/0x30 [ 30.731622] kasan_save_free_info+0x2b/0x50 [ 30.732169] __kasan_slab_free+0x10a/0x190 [ 30.732713] kmem_cache_free+0x10d/0x4d0 [ 30.733233] rcu_core+0x8c8/0x2860 [ 30.733689] __do_softirq+0x1b7/0x7d4 [ 30.734179] [ 30.734399] Last potentially related work creation: [ 30.735003] kasan_save_stack+0x22/0x50 [ 30.735527] __kasan_record_aux_stack+0x8e/0xa0 [ 30.736117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.736774] remove_vma+0x139/0x170 [ 30.737232] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.737808] do_vmi_munmap+0x1f1/0x2b0 [ 30.738307] __vm_munmap+0x138/0x3a0 [ 30.738783] __x64_sys_munmap+0x59/0x80 [ 30.739286] do_syscall_64+0x3f/0x90 [ 30.739795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740453] [ 30.740678] The buggy address belongs to the object at ffff888015feb910 [ 30.740678] which belongs to the cache vm_area_struct of size 168 [ 30.742181] The buggy address is located 88 bytes inside of [ 30.742181] freed 168-byte region [ffff888015feb910, ffff888015feb9b8) [ 30.743627] [ 30.743853] The buggy address belongs to the physical page: [ 30.744556] page:00000000630e583a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15feb [ 30.745681] memcg:ffff88800c6b4101 [ 30.746125] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.746794] page_type: 0xffffffff() [ 30.747261] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.748232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6b4101 [ 30.749165] page dumped because: kasan: bad access detected [ 30.749850] [ 30.750075] Memory state around the buggy address: [ 30.750676] ffff888015feb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.751606] ffff888015feb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.752498] >ffff888015feb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.753379] ^ [ 30.754185] ffff888015feb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.755073] ffff888015feba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.755957] ================================================================== [ 30.757027] Disabling lock debugging due to kernel taint [ 32.541628] BUG: Bad rss-counter state mm:000000009be184b3 type:MM_FILEPAGES val:33 [ 32.542761] BUG: Bad rss-counter state mm:000000009be184b3 type:MM_ANONPAGES val:22 [ 33.018117] BUG: Bad rss-counter state mm:00000000d22c9d71 type:MM_FILEPAGES val:33 [ 33.019632] BUG: Bad rss-counter state mm:00000000d22c9d71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25603' (ECDSA) to the list of known hosts. 2023/06/21 01:06:43 fuzzer started 2023/06/21 01:06:44 dialing manager at localhost:36067 2023/06/21 01:06:44 checking machine... 2023/06/21 01:06:44 checking revisions... [ 33.738652] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:06:44 testing simple program... [ 33.780514] cgroup: Unknown subsys name 'net' [ 33.818137] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:06:43 Registers: info registers vcpu 0 RAX=0000000000020de5 RBX=0000000000000001 RCX=ffffffff8180ce88 RDX=0000000000020df9 RSI=00000000000080ce RDI=ffffffff861390de RBP=ffff888014797570 RSP=ffff8880147974a8 R8 =ffffffff86139066 R9 =ffff888014797558 R10=0000000000038001 R11=0000000000020de5 R12=ffff888014797578 R13=ffff888014797560 R14=ffff888014797559 R15=ffff888014797518 RIP=ffffffff81130868 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 00007fb673aeb900 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=00007fb672ee1fe0 CR3=000000000d702000 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=2033343a36303a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a36303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff861386ee RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800cc8f950 RSP=ffff88800cc8f888 R8 =ffffffff861386f2 R9 =ffff88800cc8f938 R10=0000000000038001 R11=0000000000020c51 R12=ffff88800cc8f958 R13=ffff88800cc8f940 R14=ffff88800cc8fcc8 R15=ffff88800cc8f8f8 RIP=ffffffff81131770 RFL=00000297 [--S-APC] 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 00007f85c66e7900 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=00007ffe0be19000 CR3=000000000e43c000 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