syzkaller login: [ 30.615455] BUG: Bad rss-counter state mm:00000000120d079f type:MM_FILEPAGES val:33 [ 30.617094] BUG: Bad rss-counter state mm:00000000120d079f type:MM_ANONPAGES val:22 [ 30.768228] ================================================================== [ 30.769389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770740] Read of size 8 at addr ffff88800fc524e0 by task sshd/220 [ 30.771592] [ 30.771808] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.772690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.773652] Call Trace: [ 30.773973] [ 30.774254] dump_stack_lvl+0x91/0xf0 [ 30.774777] print_report+0xcc/0x620 [ 30.775274] ? __virt_addr_valid+0x102/0x340 [ 30.775836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776478] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777111] kasan_report+0xbe/0xf0 [ 30.777591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778218] vma_interval_tree_remove+0xc75/0xec0 [ 30.778830] vma_prepare+0xc54/0x11a0 [ 30.779312] __split_vma+0x5af/0x950 [ 30.779796] ? __pfx___split_vma+0x10/0x10 [ 30.780342] ? find_held_lock+0x2c/0x110 [ 30.780889] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.781473] ? lock_is_held_type+0x9f/0x120 [ 30.782023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.782688] ? mtree_range_walk+0x632/0x900 [ 30.783319] ? mas_walk+0x5c7/0x7c0 [ 30.783881] do_vmi_munmap+0x1f1/0x2b0 [ 30.784580] mmap_region+0x1f9/0x2660 [ 30.785110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.785614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.786334] ? __pfx_lock_acquire+0x10/0x10 [ 30.786871] ? __pfx_mmap_region+0x10/0x10 [ 30.787403] ? security_mmap_addr+0x7d/0xa0 [ 30.787938] ? get_unmapped_area+0x1f5/0x3f0 [ 30.788518] do_mmap+0x854/0xf00 [ 30.788954] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.789527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.790224] ksys_mmap_pgoff+0x3af/0x500 [ 30.790855] do_syscall_64+0x3f/0x90 [ 30.791449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792261] RIP: 0033:0x7fb9ac32dd82 [ 30.792838] 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 [ 30.795487] RSP: 002b:00007ffed6b8c668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.796608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9ac32dd82 [ 30.797665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9ab767000 [ 30.798719] RBP: 00007fb9ab767000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055682d576f70 [ 30.800860] R13: 00007ffed6b8c680 R14: 00007ffed6b8c6b0 R15: 00007ffed6b8ca10 [ 30.801786] [ 30.802081] [ 30.802293] Allocated by task 213: [ 30.802727] kasan_save_stack+0x22/0x50 [ 30.803228] kasan_set_track+0x25/0x30 [ 30.803730] __kasan_slab_alloc+0x59/0x70 [ 30.804254] kmem_cache_alloc+0x16b/0x370 [ 30.804778] vm_area_dup+0x20/0x160 [ 30.805237] __split_vma+0x170/0x950 [ 30.805721] split_vma+0xc6/0x110 [ 30.806160] mprotect_fixup+0x8d2/0xb30 [ 30.806664] do_mprotect_pkey+0x87e/0xd40 [ 30.807182] __x64_sys_mprotect+0x78/0xc0 [ 30.807712] do_syscall_64+0x3f/0x90 [ 30.808196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808847] [ 30.809069] Freed by task 213: [ 30.809464] kasan_save_stack+0x22/0x50 [ 30.809982] kasan_set_track+0x25/0x30 [ 30.810477] kasan_save_free_info+0x2b/0x50 [ 30.811171] __kasan_slab_free+0x10a/0x190 [ 30.811846] kmem_cache_free+0x10d/0x4d0 [ 30.812499] rcu_core+0x8c8/0x2860 [ 30.813042] __do_softirq+0x1b7/0x7d4 [ 30.813628] [ 30.813895] Last potentially related work creation: [ 30.814613] kasan_save_stack+0x22/0x50 [ 30.815238] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816748] remove_vma+0x139/0x170 [ 30.817298] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817978] do_vmi_munmap+0x1f1/0x2b0 [ 30.818566] __vm_munmap+0x138/0x3a0 [ 30.819135] __x64_sys_munmap+0x59/0x80 [ 30.819743] do_syscall_64+0x3f/0x90 [ 30.820312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.821120] [ 30.821366] The buggy address belongs to the object at ffff88800fc52488 [ 30.821366] which belongs to the cache vm_area_struct of size 168 [ 30.822846] The buggy address is located 88 bytes inside of [ 30.822846] freed 168-byte region [ffff88800fc52488, ffff88800fc52530) [ 30.824263] [ 30.824484] The buggy address belongs to the physical page: [ 30.825148] page:00000000e0de006c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc52 [ 30.826230] memcg:ffff88800dbbd401 [ 30.826656] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.827306] page_type: 0xffffffff() [ 30.827759] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.828699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbbd401 [ 30.829607] page dumped because: kasan: bad access detected [ 30.830271] [ 30.830489] Memory state around the buggy address: [ 30.831076] ffff88800fc52380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.831965] ffff88800fc52400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.832835] >ffff88800fc52480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.833698] ^ [ 30.834464] ffff88800fc52500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.835325] ffff88800fc52580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836197] ================================================================== [ 30.837191] Disabling lock debugging due to kernel taint [ 33.069745] BUG: Bad rss-counter state mm:00000000be4dd014 type:MM_FILEPAGES val:33 [ 33.071009] BUG: Bad rss-counter state mm:00000000be4dd014 type:MM_ANONPAGES val:22 [ 33.491846] BUG: Bad rss-counter state mm:00000000212ff52e type:MM_FILEPAGES val:33 [ 33.493383] BUG: Bad rss-counter state mm:00000000212ff52e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2972' (ECDSA) to the list of known hosts. 2023/06/20 19:53:45 fuzzer started 2023/06/20 19:53:45 dialing manager at localhost:36067 2023/06/20 19:53:45 checking machine... 2023/06/20 19:53:45 checking revisions... [ 34.187068] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:53:46 testing simple program... [ 34.243950] cgroup: Unknown subsys name 'net' [ 34.282995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:45 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=00007f96ee865ff0 CR3=000000000efc0000 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=2035343a33353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e137e RSI=ffffffff81809add RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a98 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800e723680 R15=ffff88800e09c080 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 00007f52046e9900 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=00007f5204686008 CR3=000000000dc6a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000