syzkaller login: [ 32.565137] BUG: Bad rss-counter state mm:00000000d0f8b8a4 type:MM_FILEPAGES val:33 [ 32.565937] BUG: Bad rss-counter state mm:00000000d0f8b8a4 type:MM_ANONPAGES val:22 [ 32.597803] ================================================================== [ 32.598586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.599261] Read of size 8 at addr ffff888018ec4058 by task sshd/220 [ 32.599803] [ 32.599954] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.600540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.601341] Call Trace: [ 32.601607] [ 32.601864] dump_stack_lvl+0x91/0xf0 [ 32.602210] print_report+0xcc/0x620 [ 32.602557] ? __virt_addr_valid+0x102/0x340 [ 32.602930] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.603354] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.603787] kasan_report+0xbe/0xf0 [ 32.604111] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.604539] vma_interval_tree_remove+0xc75/0xec0 [ 32.604955] vma_prepare+0xc54/0x11a0 [ 32.605298] __split_vma+0x5af/0x950 [ 32.605642] ? __pfx___split_vma+0x10/0x10 [ 32.606051] ? find_held_lock+0x2c/0x110 [ 32.606401] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.606785] ? lock_is_held_type+0x9f/0x120 [ 32.607160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.607583] ? mtree_range_walk+0x632/0x900 [ 32.607950] ? mas_walk+0x5c7/0x7c0 [ 32.608284] do_vmi_munmap+0x1f1/0x2b0 [ 32.608630] mmap_region+0x1f9/0x2660 [ 32.608956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.609283] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.609793] ? __pfx_lock_acquire+0x10/0x10 [ 32.610145] ? __pfx_mmap_region+0x10/0x10 [ 32.610484] ? security_mmap_addr+0x7d/0xa0 [ 32.610866] ? get_unmapped_area+0x1f5/0x3f0 [ 32.611245] do_mmap+0x854/0xf00 [ 32.611541] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.611870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.612264] ksys_mmap_pgoff+0x3af/0x500 [ 32.612610] do_syscall_64+0x3f/0x90 [ 32.612932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.613342] RIP: 0033:0x7f571ab62d82 [ 32.613632] 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 [ 32.615118] RSP: 002b:00007ffdd326c818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.615767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f571ab62d82 [ 32.616367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5719f9c000 [ 32.616972] RBP: 00007f5719f9c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.617572] R10: 0000000000000812 R11: 0000000000000206 R12: 000055629aee0ec0 [ 32.618219] R13: 00007ffdd326c830 R14: 00007ffdd326c860 R15: 00007ffdd326cbc0 [ 32.618825] [ 32.619035] [ 32.619186] Allocated by task 213: [ 32.619485] kasan_save_stack+0x22/0x50 [ 32.619848] kasan_set_track+0x25/0x30 [ 32.620196] __kasan_slab_alloc+0x59/0x70 [ 32.620567] kmem_cache_alloc+0x16b/0x370 [ 32.620932] vm_area_dup+0x20/0x160 [ 32.621255] __split_vma+0x170/0x950 [ 32.621581] split_vma+0xc6/0x110 [ 32.621914] mprotect_fixup+0x8d2/0xb30 [ 32.622269] do_mprotect_pkey+0x87e/0xd40 [ 32.622634] __x64_sys_mprotect+0x78/0xc0 [ 32.622997] do_syscall_64+0x3f/0x90 [ 32.623318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.623760] [ 32.623924] Freed by task 213: [ 32.624207] kasan_save_stack+0x22/0x50 [ 32.624570] kasan_set_track+0x25/0x30 [ 32.624923] kasan_save_free_info+0x2b/0x50 [ 32.625302] __kasan_slab_free+0x10a/0x190 [ 32.625673] kmem_cache_free+0x10d/0x4d0 [ 32.626045] rcu_core+0x8c8/0x2860 [ 32.626358] __do_softirq+0x1b7/0x7d4 [ 32.626692] [ 32.626847] Last potentially related work creation: [ 32.627257] kasan_save_stack+0x22/0x50 [ 32.627613] __kasan_record_aux_stack+0x8e/0xa0 [ 32.628022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.628473] remove_vma+0x139/0x170 [ 32.628787] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.629190] do_vmi_munmap+0x1f1/0x2b0 [ 32.629542] __vm_munmap+0x138/0x3a0 [ 32.629902] __x64_sys_munmap+0x59/0x80 [ 32.630259] do_syscall_64+0x3f/0x90 [ 32.630593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.631044] [ 32.631197] Second to last potentially related work creation: [ 32.631686] kasan_save_stack+0x22/0x50 [ 32.632047] __kasan_record_aux_stack+0x8e/0xa0 [ 32.632448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.632942] remove_vma+0x139/0x170 [ 32.633259] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.633642] do_vmi_munmap+0x1f1/0x2b0 [ 32.634018] mmap_region+0x1f9/0x2660 [ 32.634342] do_mmap+0x854/0xf00 [ 32.634642] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.634994] ksys_mmap_pgoff+0x3af/0x500 [ 32.635335] do_syscall_64+0x3f/0x90 [ 32.635669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.636092] [ 32.636229] The buggy address belongs to the object at ffff888018ec4000 [ 32.636229] which belongs to the cache vm_area_struct of size 168 [ 32.637223] The buggy address is located 88 bytes inside of [ 32.637223] freed 168-byte region [ffff888018ec4000, ffff888018ec40a8) [ 32.638250] [ 32.638396] The buggy address belongs to the physical page: [ 32.638850] page:00000000d9f7e33a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ec4 [ 32.639611] memcg:ffff88800fb02501 [ 32.639934] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.640386] page_type: 0xffffffff() [ 32.640707] raw: 0100000000000200 ffff88800879fc80 ffffea00003b1100 000000000000000a [ 32.641396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb02501 [ 32.642048] page dumped because: kasan: bad access detected [ 32.642506] [ 32.642661] Memory state around the buggy address: [ 32.643091] ffff888018ec3f00: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb [ 32.643690] ffff888018ec3f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 32.644270] >ffff888018ec4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.644844] ^ [ 32.645382] ffff888018ec4080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.645989] ffff888018ec4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.646580] ================================================================== [ 32.647640] Disabling lock debugging due to kernel taint [ 34.374614] BUG: Bad rss-counter state mm:00000000b6c43ad2 type:MM_FILEPAGES val:33 [ 34.375326] BUG: Bad rss-counter state mm:00000000b6c43ad2 type:MM_ANONPAGES val:22 [ 34.752585] BUG: Bad rss-counter state mm:00000000c9ea5228 type:MM_FILEPAGES val:33 [ 34.753294] BUG: Bad rss-counter state mm:00000000c9ea5228 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31870' (ECDSA) to the list of known hosts. 2023/06/20 09:28:27 fuzzer started 2023/06/20 09:28:27 dialing manager at localhost:44161 2023/06/20 09:28:27 checking machine... 2023/06/20 09:28:27 checking revisions... [ 35.316795] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:28:28 testing simple program... [ 35.354902] cgroup: Unknown subsys name 'net' [ 35.406085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:28:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff81143eea RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800dab2c70 RBP=ffff88800dab2c70 RSP=ffff88800a1e7a98 R8 =0000000000000000 R9 =ffff88800dab2c73 R10=ffff88800dab2c73 R11=0000000000000000 R12=ffff8880102e1280 R13=ffff88800dab2c70 R14=0000000000000020 R15=0000000000000049 RIP=ffffffff8180ef09 RFL=00000016 [----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 00007f121e7dd900 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=00007f121ed92650 CR3=000000000e28e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffcd0901a18 CR3=000000000e28e000 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=38323a3930203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000