syzkaller login: [ 30.211103] BUG: Bad rss-counter state mm:00000000b00524f9 type:MM_FILEPAGES val:33 [ 30.212542] BUG: Bad rss-counter state mm:00000000b00524f9 type:MM_ANONPAGES val:22 [ 30.376245] ================================================================== [ 30.377366] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.378583] Read of size 8 at addr ffff88800f20f310 by task sshd/220 [ 30.379365] [ 30.379585] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.380516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.381558] Call Trace: [ 30.381882] [ 30.382199] dump_stack_lvl+0x91/0xf0 [ 30.382691] print_report+0xcc/0x620 [ 30.383190] ? __virt_addr_valid+0x102/0x340 [ 30.383742] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.384372] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385014] kasan_report+0xbe/0xf0 [ 30.385506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.386182] vma_interval_tree_remove+0xc75/0xec0 [ 30.386790] vma_prepare+0xc54/0x11a0 [ 30.387280] __split_vma+0x5af/0x950 [ 30.387749] ? __pfx___split_vma+0x10/0x10 [ 30.388294] ? find_held_lock+0x2c/0x110 [ 30.388817] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.389390] ? lock_is_held_type+0x9f/0x120 [ 30.389931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.390574] ? mtree_range_walk+0x632/0x900 [ 30.391155] ? mas_walk+0x5c7/0x7c0 [ 30.391633] do_vmi_munmap+0x1f1/0x2b0 [ 30.392143] mmap_region+0x1f9/0x2660 [ 30.392667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.393190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.393960] ? __pfx_lock_acquire+0x10/0x10 [ 30.394519] ? __pfx_mmap_region+0x10/0x10 [ 30.395064] ? security_mmap_addr+0x7d/0xa0 [ 30.395640] ? get_unmapped_area+0x1f5/0x3f0 [ 30.396205] do_mmap+0x854/0xf00 [ 30.396689] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.397194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.397757] ksys_mmap_pgoff+0x3af/0x500 [ 30.398311] do_syscall_64+0x3f/0x90 [ 30.398791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.399473] RIP: 0033:0x7f38c770dd82 [ 30.399935] 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 [ 30.402174] RSP: 002b:00007ffcefaa9f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.403124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38c770dd82 [ 30.403994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38c6b47000 [ 30.404892] RBP: 00007f38c6b47000 R08: 0000000000000009 R09: 0000000000001000 [ 30.405754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d404cd3ec0 [ 30.406617] R13: 00007ffcefaa9f40 R14: 00007ffcefaa9f70 R15: 00007ffcefaaa2d0 [ 30.407509] [ 30.407803] [ 30.408028] Allocated by task 213: [ 30.408465] kasan_save_stack+0x22/0x50 [ 30.408976] kasan_set_track+0x25/0x30 [ 30.409487] __kasan_slab_alloc+0x59/0x70 [ 30.410061] kmem_cache_alloc+0x16b/0x370 [ 30.410580] vm_area_dup+0x20/0x160 [ 30.411051] __split_vma+0x170/0x950 [ 30.411573] split_vma+0xc6/0x110 [ 30.412020] mprotect_fixup+0x8d2/0xb30 [ 30.412577] do_mprotect_pkey+0x87e/0xd40 [ 30.413110] __x64_sys_mprotect+0x78/0xc0 [ 30.413637] do_syscall_64+0x3f/0x90 [ 30.414139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.414784] [ 30.415006] Freed by task 213: [ 30.415425] kasan_save_stack+0x22/0x50 [ 30.415931] kasan_set_track+0x25/0x30 [ 30.416451] kasan_save_free_info+0x2b/0x50 [ 30.416987] __kasan_slab_free+0x10a/0x190 [ 30.417582] kmem_cache_free+0x10d/0x4d0 [ 30.418166] rcu_core+0x8c8/0x2860 [ 30.418740] __do_softirq+0x1b7/0x7d4 [ 30.419278] [ 30.419506] Last potentially related work creation: [ 30.420112] kasan_save_stack+0x22/0x50 [ 30.420616] __kasan_record_aux_stack+0x8e/0xa0 [ 30.421204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.421890] remove_vma+0x139/0x170 [ 30.422389] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.422987] do_vmi_munmap+0x1f1/0x2b0 [ 30.423504] __vm_munmap+0x138/0x3a0 [ 30.423974] __x64_sys_munmap+0x59/0x80 [ 30.424521] do_syscall_64+0x3f/0x90 [ 30.425008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.425711] [ 30.425929] The buggy address belongs to the object at ffff88800f20f2b8 [ 30.425929] which belongs to the cache vm_area_struct of size 168 [ 30.427473] The buggy address is located 88 bytes inside of [ 30.427473] freed 168-byte region [ffff88800f20f2b8, ffff88800f20f360) [ 30.428969] [ 30.429201] The buggy address belongs to the physical page: [ 30.429863] page:00000000aca5abd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf20f [ 30.430979] memcg:ffff88800e074b01 [ 30.431447] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.432136] page_type: 0xffffffff() [ 30.432635] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.433567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e074b01 [ 30.434516] page dumped because: kasan: bad access detected [ 30.435188] [ 30.435405] Memory state around the buggy address: [ 30.435993] ffff88800f20f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.436916] ffff88800f20f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.437823] >ffff88800f20f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.438698] ^ [ 30.439238] ffff88800f20f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.440338] ffff88800f20f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.441288] ================================================================== [ 30.442432] Disabling lock debugging due to kernel taint [ 32.596874] BUG: Bad rss-counter state mm:000000003408e09c type:MM_FILEPAGES val:33 [ 32.598209] BUG: Bad rss-counter state mm:000000003408e09c type:MM_ANONPAGES val:22 [ 33.072904] BUG: Bad rss-counter state mm:000000000736de79 type:MM_FILEPAGES val:33 [ 33.074174] BUG: Bad rss-counter state mm:000000000736de79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24822' (ECDSA) to the list of known hosts. 2023/06/20 06:19:13 fuzzer started 2023/06/20 06:19:14 dialing manager at localhost:44161 2023/06/20 06:19:14 checking machine... 2023/06/20 06:19:14 checking revisions... [ 33.662423] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:19:14 testing simple program... [ 33.705243] cgroup: Unknown subsys name 'net' [ 33.767140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:13 Registers: info registers vcpu 0 RAX=00000000651e9020 RBX=00000000149029cc RCX=ffff8880103a73b4 RDX=0000000000000012 RSI=0000000000000003 RDI=00000000b16b5fa4 RBP=ffff88800844f780 RSP=ffff8880103a72c8 R8 =000000006cf58477 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff8880103a7330 R15=0000000000000012 RIP=ffffffff82270e94 RFL=00000a16 [-O--AP-] 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 00007f3fb9e1c900 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=00007f3fb926a050 CR3=000000000d788000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6afca4f63a3eb52b00000000000ae988 XMM05=15293cbf2c631fac00000000001356f8 XMM06=4fda316b135da52b00000000001344e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf4736 RBX=ffffffff85fa39b4 RCX=ffffffff8363de42 RDX=0000000000000000 RSI=ffffffff863b1c96 RDI=ffffffff85fa39b0 RBP=ffffffff85fa39b0 RSP=ffff88801a0379f8 R8 =ffffffff863b1c96 R9 =ffff88801a037af0 R10=0000000000038001 R11=000000000008a977 R12=ffffffff85fa39b8 R13=ffffffff85fa39b0 R14=ffffffff85fa39b0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----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 00007f59d4eb5900 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=00007fffb8ec6000 CR3=000000000dd54000 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