syzkaller login: [ 30.984861] BUG: Bad rss-counter state mm:00000000e2a52559 type:MM_FILEPAGES val:33 [ 30.985894] BUG: Bad rss-counter state mm:00000000e2a52559 type:MM_ANONPAGES val:22 [ 31.154038] ================================================================== [ 31.154957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.155912] Read of size 8 at addr ffff8880168473f8 by task sshd/219 [ 31.156698] [ 31.156917] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.157990] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.158964] Call Trace: [ 31.159283] [ 31.159597] dump_stack_lvl+0x91/0xf0 [ 31.160090] print_report+0xcc/0x620 [ 31.160580] ? __virt_addr_valid+0x102/0x340 [ 31.161130] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162370] kasan_report+0xbe/0xf0 [ 31.162847] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163482] vma_interval_tree_remove+0xc75/0xec0 [ 31.164086] vma_prepare+0xc54/0x11a0 [ 31.164567] __split_vma+0x5af/0x950 [ 31.165039] ? __pfx___split_vma+0x10/0x10 [ 31.165591] ? find_held_lock+0x2c/0x110 [ 31.166116] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.166682] ? lock_is_held_type+0x9f/0x120 [ 31.167221] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.167857] ? mtree_range_walk+0x632/0x900 [ 31.168420] ? mas_walk+0x5c7/0x7c0 [ 31.168898] do_vmi_munmap+0x1f1/0x2b0 [ 31.169395] mmap_region+0x1f9/0x2660 [ 31.169881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.170404] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.171129] ? __pfx_lock_acquire+0x10/0x10 [ 31.171703] ? __pfx_mmap_region+0x10/0x10 [ 31.172238] ? security_mmap_addr+0x7d/0xa0 [ 31.172796] ? get_unmapped_area+0x1f5/0x3f0 [ 31.173370] do_mmap+0x854/0xf00 [ 31.173834] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.174358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.174950] ksys_mmap_pgoff+0x3af/0x500 [ 31.175507] do_syscall_64+0x3f/0x90 [ 31.176015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176696] RIP: 0033:0x7fe89b957d82 [ 31.177187] 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 [ 31.179462] RSP: 002b:00007ffce6e999d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.180410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe89b957d82 [ 31.181305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe89ad91000 [ 31.182206] RBP: 00007fe89ad91000 R08: 0000000000000009 R09: 0000000000001000 [ 31.183104] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfcad74f70 [ 31.184012] R13: 00007ffce6e999f0 R14: 00007ffce6e99a20 R15: 00007ffce6e99d80 [ 31.184923] [ 31.185229] [ 31.185457] Allocated by task 212: [ 31.185907] kasan_save_stack+0x22/0x50 [ 31.186435] kasan_set_track+0x25/0x30 [ 31.186950] __kasan_slab_alloc+0x59/0x70 [ 31.187521] kmem_cache_alloc+0x16b/0x370 [ 31.188062] vm_area_dup+0x20/0x160 [ 31.188537] __split_vma+0x170/0x950 [ 31.189026] split_vma+0xc6/0x110 [ 31.189480] mprotect_fixup+0x8d2/0xb30 [ 31.190008] do_mprotect_pkey+0x87e/0xd40 [ 31.190558] __x64_sys_mprotect+0x78/0xc0 [ 31.191104] do_syscall_64+0x3f/0x90 [ 31.191624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192317] [ 31.192543] Freed by task 202: [ 31.192952] kasan_save_stack+0x22/0x50 [ 31.193482] kasan_set_track+0x25/0x30 [ 31.194001] kasan_save_free_info+0x2b/0x50 [ 31.194567] __kasan_slab_free+0x10a/0x190 [ 31.195125] kmem_cache_free+0x10d/0x4d0 [ 31.195671] rcu_core+0x8c8/0x2860 [ 31.196134] __do_softirq+0x1b7/0x7d4 [ 31.196646] [ 31.196871] Last potentially related work creation: [ 31.197486] kasan_save_stack+0x22/0x50 [ 31.198014] __kasan_record_aux_stack+0x8e/0xa0 [ 31.198665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.199374] remove_vma+0x139/0x170 [ 31.199867] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.200454] do_vmi_munmap+0x1f1/0x2b0 [ 31.200971] __vm_munmap+0x138/0x3a0 [ 31.201466] __x64_sys_munmap+0x59/0x80 [ 31.201989] do_syscall_64+0x3f/0x90 [ 31.202485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203165] [ 31.203389] The buggy address belongs to the object at ffff8880168473a0 [ 31.203389] which belongs to the cache vm_area_struct of size 168 [ 31.204974] The buggy address is located 88 bytes inside of [ 31.204974] freed 168-byte region [ffff8880168473a0, ffff888016847448) [ 31.206464] [ 31.206687] The buggy address belongs to the physical page: [ 31.207387] page:00000000199fca2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16847 [ 31.208559] memcg:ffff88800e9aac01 [ 31.209008] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.209691] page_type: 0xffffffff() [ 31.210170] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.211155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9aac01 [ 31.212132] page dumped because: kasan: bad access detected [ 31.212840] [ 31.213064] Memory state around the buggy address: [ 31.213679] ffff888016847280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.214585] ffff888016847300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.215500] >ffff888016847380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.216360] ^ [ 31.217204] ffff888016847400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.218064] ffff888016847480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.218918] ================================================================== [ 31.219844] Disabling lock debugging due to kernel taint [ 33.247955] BUG: Bad rss-counter state mm:00000000409f3938 type:MM_FILEPAGES val:33 [ 33.248993] BUG: Bad rss-counter state mm:00000000409f3938 type:MM_ANONPAGES val:22 [ 33.744335] BUG: Bad rss-counter state mm:000000005a7d8bba type:MM_FILEPAGES val:33 [ 33.745491] BUG: Bad rss-counter state mm:000000005a7d8bba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52197' (ECDSA) to the list of known hosts. 2023/06/20 19:05:41 fuzzer started 2023/06/20 19:05:41 dialing manager at localhost:36067 2023/06/20 19:05:41 checking machine... 2023/06/20 19:05:41 checking revisions... [ 34.487905] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:05:41 testing simple program... [ 34.533843] cgroup: Unknown subsys name 'net' [ 34.570957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:05:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800ec19b40 RSI=ffff888016869680 RDI=ffff88800e76a000 RBP=ffff88800e76a000 RSP=ffff888015ddfed8 R8 =0000000000000003 R9 =0000000000004000 R10=000000000000c000 R11=0000000000000000 R12=ffff888016869680 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff819cdb94 RFL=00000293 [--S-A-C] 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 00007f49720f9900 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=00007fedd9853000 CR3=000000000eca8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd60232df8 CR3=0000000005482000 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=00007f649a3ed510000055da89fd3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000