syzkaller login: [ 30.566579] BUG: Bad rss-counter state mm:000000007a04052c type:MM_FILEPAGES val:33 [ 30.567592] BUG: Bad rss-counter state mm:000000007a04052c type:MM_ANONPAGES val:22 [ 30.755227] ================================================================== [ 30.756244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.757478] Read of size 8 at addr ffff88800ea70b38 by task sshd/220 [ 30.758334] [ 30.758575] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.759540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.760624] Call Trace: [ 30.761003] [ 30.761317] dump_stack_lvl+0x91/0xf0 [ 30.761883] print_report+0xcc/0x620 [ 30.762434] ? __virt_addr_valid+0x102/0x340 [ 30.763059] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.764464] kasan_report+0xbe/0xf0 [ 30.765029] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765748] vma_interval_tree_remove+0xc75/0xec0 [ 30.766433] vma_prepare+0xc54/0x11a0 [ 30.766983] __split_vma+0x5af/0x950 [ 30.767529] ? __pfx___split_vma+0x10/0x10 [ 30.768138] ? find_held_lock+0x2c/0x110 [ 30.768741] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.769398] ? lock_is_held_type+0x9f/0x120 [ 30.770023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.770723] ? mtree_range_walk+0x632/0x900 [ 30.771345] ? mas_walk+0x5c7/0x7c0 [ 30.771882] do_vmi_munmap+0x1f1/0x2b0 [ 30.772447] mmap_region+0x1f9/0x2660 [ 30.773018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.773602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.774419] ? __pfx_lock_acquire+0x10/0x10 [ 30.775023] ? __pfx_mmap_region+0x10/0x10 [ 30.775630] ? security_mmap_addr+0x7d/0xa0 [ 30.776230] ? get_unmapped_area+0x1f5/0x3f0 [ 30.776869] do_mmap+0x854/0xf00 [ 30.777365] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.777931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.778571] ksys_mmap_pgoff+0x3af/0x500 [ 30.779149] do_syscall_64+0x3f/0x90 [ 30.779690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780423] RIP: 0033:0x7fa1961abd82 [ 30.780961] 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 [ 30.783392] RSP: 002b:00007ffc1c35d858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.784421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1961abd82 [ 30.785385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1955e5000 [ 30.786356] RBP: 00007fa1955e5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.787320] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594d2da8f60 [ 30.788286] R13: 00007ffc1c35d870 R14: 00007ffc1c35d8a0 R15: 00007ffc1c35dc00 [ 30.789263] [ 30.789596] [ 30.789838] Allocated by task 213: [ 30.790320] kasan_save_stack+0x22/0x50 [ 30.790895] kasan_set_track+0x25/0x30 [ 30.791449] __kasan_slab_alloc+0x59/0x70 [ 30.792041] kmem_cache_alloc+0x16b/0x370 [ 30.792622] vm_area_dup+0x20/0x160 [ 30.793146] __split_vma+0x170/0x950 [ 30.793676] split_vma+0xc6/0x110 [ 30.794170] mprotect_fixup+0x8d2/0xb30 [ 30.794735] do_mprotect_pkey+0x87e/0xd40 [ 30.795325] __x64_sys_mprotect+0x78/0xc0 [ 30.795917] do_syscall_64+0x3f/0x90 [ 30.796449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797175] [ 30.797413] Freed by task 13: [ 30.797849] kasan_save_stack+0x22/0x50 [ 30.798411] kasan_set_track+0x25/0x30 [ 30.799057] kasan_save_free_info+0x2b/0x50 [ 30.799660] __kasan_slab_free+0x10a/0x190 [ 30.800257] kmem_cache_free+0x10d/0x4d0 [ 30.800848] rcu_core+0x8c8/0x2860 [ 30.801353] __do_softirq+0x1b7/0x7d4 [ 30.801895] [ 30.802137] Last potentially related work creation: [ 30.802797] kasan_save_stack+0x22/0x50 [ 30.803361] __kasan_record_aux_stack+0x8e/0xa0 [ 30.804002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.804728] remove_vma+0x139/0x170 [ 30.805244] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.805868] do_vmi_munmap+0x1f1/0x2b0 [ 30.806415] __vm_munmap+0x138/0x3a0 [ 30.806950] __x64_sys_munmap+0x59/0x80 [ 30.807507] do_syscall_64+0x3f/0x90 [ 30.808040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808768] [ 30.809035] Second to last potentially related work creation: [ 30.809804] kasan_save_stack+0x22/0x50 [ 30.810362] __kasan_record_aux_stack+0x8e/0xa0 [ 30.811000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.811716] remove_vma+0x139/0x170 [ 30.812219] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.812843] do_vmi_munmap+0x1f1/0x2b0 [ 30.813383] mmap_region+0x1f9/0x2660 [ 30.813919] do_mmap+0x854/0xf00 [ 30.814399] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.814944] ksys_mmap_pgoff+0x3af/0x500 [ 30.815501] do_syscall_64+0x3f/0x90 [ 30.816032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816751] [ 30.817010] The buggy address belongs to the object at ffff88800ea70ae0 [ 30.817010] which belongs to the cache vm_area_struct of size 168 [ 30.818653] The buggy address is located 88 bytes inside of [ 30.818653] freed 168-byte region [ffff88800ea70ae0, ffff88800ea70b88) [ 30.820215] [ 30.820454] The buggy address belongs to the physical page: [ 30.821197] page:000000009243b84b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea70 [ 30.822413] memcg:ffff888015d92201 [ 30.822891] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.823605] page_type: 0xffffffff() [ 30.824105] raw: 0100000000000200 ffff8880087a0c80 ffffea0000270480 dead000000000006 [ 30.825138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d92201 [ 30.826147] page dumped because: kasan: bad access detected [ 30.826890] [ 30.827128] Memory state around the buggy address: [ 30.827774] ffff88800ea70a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.828729] ffff88800ea70a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.829733] >ffff88800ea70b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.830719] ^ [ 30.831424] ffff88800ea70b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.832406] ffff88800ea70c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.833404] ================================================================== [ 30.834510] Disabling lock debugging due to kernel taint [ 33.636501] BUG: Bad rss-counter state mm:0000000001654188 type:MM_FILEPAGES val:33 [ 33.638116] BUG: Bad rss-counter state mm:0000000001654188 type:MM_ANONPAGES val:22 [ 34.210558] BUG: Bad rss-counter state mm:00000000996c5cc6 type:MM_FILEPAGES val:33 [ 34.211713] BUG: Bad rss-counter state mm:00000000996c5cc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49194' (ECDSA) to the list of known hosts. 2023/06/21 04:02:29 fuzzer started 2023/06/21 04:02:29 dialing manager at localhost:36067 2023/06/21 04:02:29 checking machine... 2023/06/21 04:02:29 checking revisions... [ 34.838599] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:02:29 testing simple program... [ 34.885509] cgroup: Unknown subsys name 'net' [ 34.939028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005589da72a780 RCX=0000000000000000 RDX=0000000000000005 RSI=0000000000008000 RDI=00005589da713350 RBP=0000000000000000 RSP=00007ffe1f74bfd0 R8 =00005589da7392c0 R9 =0000000000000000 R10=00005589d9142d0c R11=0000000000000246 R12=00005589da713350 R13=0000000000000005 R14=0000000000008000 R15=00005589da733680 RIP=00007f3659b35ed1 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3659010900 00000000 00000000 GS =0000 0000000000000000 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=00005589da737664 CR3=0000000019d8e000 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=000000000000000000005589d90e3060 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=0000000000000000 RBX=0000000000000006 RCX=ffffffff818dad1a RDX=ffff8880147f8000 RSI=0000000000000004 RDI=0000000000000000 RBP=ffff888015c77a18 RSP=ffff888015c779f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880161e5bd8 R13=0000000000000004 R14=ffff888015c77a58 R15=ffff8880161e5bd8 RIP=ffffffff814c0408 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8c4919b900 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=00007f8c485da000 CR3=00000000095de000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f03f20bb1406674f00000000000ae988 XMM05=6b7aaa3a263b17380000000000134240 XMM06=19e9129bd510f23500000000001330d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000