syzkaller login: [ 31.201889] BUG: Bad rss-counter state mm:00000000a94528b0 type:MM_FILEPAGES val:33 [ 31.203403] BUG: Bad rss-counter state mm:00000000a94528b0 type:MM_ANONPAGES val:22 [ 31.366774] ================================================================== [ 31.367823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.368903] Read of size 8 at addr ffff88800e5573f8 by task sshd/220 [ 31.369900] [ 31.370151] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.371199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.372402] Call Trace: [ 31.372780] [ 31.373110] dump_stack_lvl+0x91/0xf0 [ 31.373685] print_report+0xcc/0x620 [ 31.374247] ? __virt_addr_valid+0x102/0x340 [ 31.374889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376333] kasan_report+0xbe/0xf0 [ 31.376853] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377522] vma_interval_tree_remove+0xc75/0xec0 [ 31.378115] vma_prepare+0xc54/0x11a0 [ 31.378588] __split_vma+0x5af/0x950 [ 31.379047] ? __pfx___split_vma+0x10/0x10 [ 31.379584] ? find_held_lock+0x2c/0x110 [ 31.380099] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.380658] ? lock_is_held_type+0x9f/0x120 [ 31.381190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.381786] ? mtree_range_walk+0x632/0x900 [ 31.382329] ? mas_walk+0x5c7/0x7c0 [ 31.382797] do_vmi_munmap+0x1f1/0x2b0 [ 31.383295] mmap_region+0x1f9/0x2660 [ 31.383766] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.384272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.384980] ? __pfx_lock_acquire+0x10/0x10 [ 31.385501] ? __pfx_mmap_region+0x10/0x10 [ 31.386030] ? security_mmap_addr+0x7d/0xa0 [ 31.386555] ? get_unmapped_area+0x1f5/0x3f0 [ 31.387088] do_mmap+0x854/0xf00 [ 31.387553] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.388043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.388593] ksys_mmap_pgoff+0x3af/0x500 [ 31.389088] do_syscall_64+0x3f/0x90 [ 31.389560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390195] RIP: 0033:0x7f5d68551d82 [ 31.390792] 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 [ 31.392939] RSP: 002b:00007ffd937b9498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.393847] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d68551d82 [ 31.394693] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d6798b000 [ 31.395564] RBP: 00007f5d6798b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.396418] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556eb4afbf70 [ 31.397265] R13: 00007ffd937b94b0 R14: 00007ffd937b94e0 R15: 00007ffd937b9840 [ 31.398138] [ 31.398437] [ 31.398660] Allocated by task 213: [ 31.399099] kasan_save_stack+0x22/0x50 [ 31.399640] kasan_set_track+0x25/0x30 [ 31.400139] __kasan_slab_alloc+0x59/0x70 [ 31.400684] kmem_cache_alloc+0x16b/0x370 [ 31.401218] vm_area_dup+0x20/0x160 [ 31.401684] __split_vma+0x170/0x950 [ 31.402158] split_vma+0xc6/0x110 [ 31.402615] mprotect_fixup+0x8d2/0xb30 [ 31.403136] do_mprotect_pkey+0x87e/0xd40 [ 31.403672] __x64_sys_mprotect+0x78/0xc0 [ 31.404202] do_syscall_64+0x3f/0x90 [ 31.404679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405326] [ 31.405546] Freed by task 202: [ 31.405939] kasan_save_stack+0x22/0x50 [ 31.406454] kasan_set_track+0x25/0x30 [ 31.406950] kasan_save_free_info+0x2b/0x50 [ 31.407499] __kasan_slab_free+0x10a/0x190 [ 31.408035] kmem_cache_free+0x10d/0x4d0 [ 31.408546] rcu_core+0x8c8/0x2860 [ 31.408990] __do_softirq+0x1b7/0x7d4 [ 31.409475] [ 31.409696] Last potentially related work creation: [ 31.410285] kasan_save_stack+0x22/0x50 [ 31.410897] __kasan_record_aux_stack+0x8e/0xa0 [ 31.411512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.412160] remove_vma+0x139/0x170 [ 31.412615] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.413179] do_vmi_munmap+0x1f1/0x2b0 [ 31.413671] __vm_munmap+0x138/0x3a0 [ 31.414142] __x64_sys_munmap+0x59/0x80 [ 31.414646] do_syscall_64+0x3f/0x90 [ 31.415129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415779] [ 31.416000] The buggy address belongs to the object at ffff88800e5573a0 [ 31.416000] which belongs to the cache vm_area_struct of size 168 [ 31.417490] The buggy address is located 88 bytes inside of [ 31.417490] freed 168-byte region [ffff88800e5573a0, ffff88800e557448) [ 31.418910] [ 31.419143] The buggy address belongs to the physical page: [ 31.419811] page:00000000bd3ed59a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe557 [ 31.420902] memcg:ffff88800f04c401 [ 31.421331] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.421983] page_type: 0xffffffff() [ 31.422432] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.423360] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f04c401 [ 31.424279] page dumped because: kasan: bad access detected [ 31.424946] [ 31.425160] Memory state around the buggy address: [ 31.425753] ffff88800e557280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.426631] ffff88800e557300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.427513] >ffff88800e557380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.428387] ^ [ 31.429252] ffff88800e557400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.430123] ffff88800e557480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.430989] ================================================================== [ 31.431935] Disabling lock debugging due to kernel taint [ 33.711342] BUG: Bad rss-counter state mm:000000001d7dd096 type:MM_FILEPAGES val:33 [ 33.712602] BUG: Bad rss-counter state mm:000000001d7dd096 type:MM_ANONPAGES val:22 [ 34.128391] BUG: Bad rss-counter state mm:0000000088684fb0 type:MM_FILEPAGES val:33 [ 34.129517] BUG: Bad rss-counter state mm:0000000088684fb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41653' (ECDSA) to the list of known hosts. 2023/06/21 10:42:29 fuzzer started 2023/06/21 10:42:29 dialing manager at localhost:36067 2023/06/21 10:42:29 checking machine... 2023/06/21 10:42:29 checking revisions... [ 34.833403] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:42:29 testing simple program... [ 34.880865] cgroup: Unknown subsys name 'net' [ 34.929361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:42:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f4ab478ae40 CR3=000000000966a000 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=ec2556259d0b0890cd4e658d4415285b XMM02=eff9b2d0a8fce9cb000000000011bee0 XMM03=2c67c8bc2e329bc3000000000011c008 XMM04=6be2cfde5663a8c300000000000ae988 XMM05=5362b7dbf56865c70000000000133730 XMM06=4fda316b135da52b00000000001327d0 XMM07=fb795ef6d65770560000000000122a58 XMM08=2c67c8bc2e329bc3000000000011c008 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801ba56e40 RBX=ffff88801a9a52c8 RCX=1ffff11003534a60 RDX=dffffc0000000000 RSI=ffff88801ba610e8 RDI=ffff88801a9a5300 RBP=ffff88801a9a52d8 RSP=ffff88800fe87958 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801ba610b0 R13=0000000000000000 R14=ffff88800e8a2af8 R15=ffff88800e8a2ab0 RIP=ffffffff818476aa RFL=00000092 [--S-A--] 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 00007eff5b203700 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=00007f69b98ad650 CR3=0000000016b70000 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=2038323a32343a3031203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a32343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000