syzkaller login: [ 30.190535] BUG: Bad rss-counter state mm:000000000215a6e4 type:MM_FILEPAGES val:33 [ 30.191601] BUG: Bad rss-counter state mm:000000000215a6e4 type:MM_ANONPAGES val:22 [ 30.371959] ================================================================== [ 30.372907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.373952] Read of size 8 at addr ffff88800c90edf0 by task sshd/220 [ 30.374735] [ 30.374957] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.375854] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.376852] Call Trace: [ 30.377174] [ 30.377460] dump_stack_lvl+0x91/0xf0 [ 30.377988] print_report+0xcc/0x620 [ 30.378478] ? __virt_addr_valid+0x102/0x340 [ 30.379050] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.379715] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.380336] kasan_report+0xbe/0xf0 [ 30.380847] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.381470] vma_interval_tree_remove+0xc75/0xec0 [ 30.382109] vma_prepare+0xc54/0x11a0 [ 30.382593] __split_vma+0x5af/0x950 [ 30.383088] ? __pfx___split_vma+0x10/0x10 [ 30.383658] ? find_held_lock+0x2c/0x110 [ 30.384185] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.384769] ? lock_is_held_type+0x9f/0x120 [ 30.385315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.385956] ? mtree_range_walk+0x632/0x900 [ 30.386517] ? mas_walk+0x5c7/0x7c0 [ 30.387021] do_vmi_munmap+0x1f1/0x2b0 [ 30.387543] mmap_region+0x1f9/0x2660 [ 30.388043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.388561] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.389290] ? __pfx_lock_acquire+0x10/0x10 [ 30.389869] ? __pfx_mmap_region+0x10/0x10 [ 30.390416] ? security_mmap_addr+0x7d/0xa0 [ 30.390972] ? get_unmapped_area+0x1f5/0x3f0 [ 30.391574] do_mmap+0x854/0xf00 [ 30.392038] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.392539] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.393128] ksys_mmap_pgoff+0x3af/0x500 [ 30.393645] do_syscall_64+0x3f/0x90 [ 30.394158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.394843] RIP: 0033:0x7f7b46016d82 [ 30.395314] 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 [ 30.397495] RSP: 002b:00007ffebe904428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.398461] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b46016d82 [ 30.399341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b45450000 [ 30.400203] RBP: 00007f7b45450000 R08: 0000000000000009 R09: 0000000000001000 [ 30.401068] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560845f80d90 [ 30.402003] R13: 00007ffebe904440 R14: 00007ffebe904470 R15: 00007ffebe9047d0 [ 30.402893] [ 30.403215] [ 30.403434] Allocated by task 213: [ 30.403879] kasan_save_stack+0x22/0x50 [ 30.404391] kasan_set_track+0x25/0x30 [ 30.404905] __kasan_slab_alloc+0x59/0x70 [ 30.405436] kmem_cache_alloc+0x16b/0x370 [ 30.405973] vm_area_dup+0x20/0x160 [ 30.406431] __split_vma+0x170/0x950 [ 30.406930] split_vma+0xc6/0x110 [ 30.407394] mprotect_fixup+0x8d2/0xb30 [ 30.407915] do_mprotect_pkey+0x87e/0xd40 [ 30.408441] __x64_sys_mprotect+0x78/0xc0 [ 30.408980] do_syscall_64+0x3f/0x90 [ 30.409462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.410118] [ 30.410337] Freed by task 213: [ 30.410756] kasan_save_stack+0x22/0x50 [ 30.411286] kasan_set_track+0x25/0x30 [ 30.411817] kasan_save_free_info+0x2b/0x50 [ 30.412354] __kasan_slab_free+0x10a/0x190 [ 30.412910] kmem_cache_free+0x10d/0x4d0 [ 30.413423] rcu_core+0x8c8/0x2860 [ 30.413883] __do_softirq+0x1b7/0x7d4 [ 30.414366] [ 30.414587] Last potentially related work creation: [ 30.415223] kasan_save_stack+0x22/0x50 [ 30.415748] __kasan_record_aux_stack+0x8e/0xa0 [ 30.416324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.416987] remove_vma+0x139/0x170 [ 30.417444] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.418026] do_vmi_munmap+0x1f1/0x2b0 [ 30.418523] __vm_munmap+0x138/0x3a0 [ 30.419028] __x64_sys_munmap+0x59/0x80 [ 30.419541] do_syscall_64+0x3f/0x90 [ 30.420030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.420689] [ 30.420910] The buggy address belongs to the object at ffff88800c90ed98 [ 30.420910] which belongs to the cache vm_area_struct of size 168 [ 30.422405] The buggy address is located 88 bytes inside of [ 30.422405] freed 168-byte region [ffff88800c90ed98, ffff88800c90ee40) [ 30.423884] [ 30.424105] The buggy address belongs to the physical page: [ 30.424773] page:00000000475bbfd9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc90e [ 30.425870] memcg:ffff88801585b501 [ 30.426301] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.426993] page_type: 0xffffffff() [ 30.427467] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.428409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801585b501 [ 30.429332] page dumped because: kasan: bad access detected [ 30.430013] [ 30.430234] Memory state around the buggy address: [ 30.430854] ffff88800c90ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.431731] ffff88800c90ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.432700] >ffff88800c90ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.433853] ^ [ 30.434946] ffff88800c90ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.436136] ffff88800c90ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.437265] ================================================================== [ 30.438539] Disabling lock debugging due to kernel taint [ 32.245884] BUG: Bad rss-counter state mm:00000000070a8a81 type:MM_FILEPAGES val:33 [ 32.247252] BUG: Bad rss-counter state mm:00000000070a8a81 type:MM_ANONPAGES val:22 [ 32.737803] BUG: Bad rss-counter state mm:00000000057d5e97 type:MM_FILEPAGES val:33 [ 32.738784] BUG: Bad rss-counter state mm:00000000057d5e97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48024' (ECDSA) to the list of known hosts. 2023/06/20 12:16:27 fuzzer started 2023/06/20 12:16:27 dialing manager at localhost:36067 2023/06/20 12:16:27 checking machine... 2023/06/20 12:16:27 checking revisions... [ 33.498257] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:16:27 testing simple program... [ 33.546138] cgroup: Unknown subsys name 'net' [ 33.600405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:16:27 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff888009088000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff888009088180 RSP=ffff88806ce09748 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800908c4c8 R14=0000000000000000 R15=ffff888009088008 RIP=ffffffff8219168f RFL=00000046 [---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 00007fd61609a900 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=00007fd61664f650 CR3=000000000d5fa000 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861386ee RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880141f7340 RSP=ffff8880141f7278 R8 =ffffffff861386f2 R9 =ffff8880141f7328 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880141f7348 R13=ffff8880141f7330 R14=0000000000000004 R15=ffff8880141f72e8 RIP=ffffffff81131711 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 00007f66fb384900 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=00007f66fa7912c0 CR3=00000000102d4000 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=5debfc4446d306812c4ba6a444d190c2 XMM02=000000000011aa50d59e07bde36eea69 XMM03=000000000011ab78ec2efd57dc4c00df XMM04=9cce6c77c792e93a00000000000ae988 XMM05=dd3a3b8d2cf350000000000000132ff0 XMM06=4fda316b135da52b0000000000131de0 XMM07=fb795ef6d65770560000000000122110 XMM08=2c67c8bc2e329bc3000000000011ab78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000