syzkaller login: [ 32.180027] BUG: Bad rss-counter state mm:000000003ae86038 type:MM_FILEPAGES val:33 [ 32.181069] BUG: Bad rss-counter state mm:000000003ae86038 type:MM_ANONPAGES val:22 [ 32.217841] ================================================================== [ 32.218849] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.219877] Read of size 8 at addr ffff88800f318b38 by task sshd/220 [ 32.220755] [ 32.221018] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.222008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.223110] Call Trace: [ 32.223474] [ 32.223765] dump_stack_lvl+0x91/0xf0 [ 32.224329] print_report+0xcc/0x620 [ 32.224845] ? __virt_addr_valid+0x102/0x340 [ 32.225514] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.226130] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.226746] kasan_report+0xbe/0xf0 [ 32.227223] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.227842] vma_interval_tree_remove+0xc75/0xec0 [ 32.228450] vma_prepare+0xc54/0x11a0 [ 32.228949] __split_vma+0x5af/0x950 [ 32.229427] ? __pfx___split_vma+0x10/0x10 [ 32.229955] ? find_held_lock+0x2c/0x110 [ 32.230479] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.231045] ? lock_is_held_type+0x9f/0x120 [ 32.231581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.232187] ? mtree_range_walk+0x632/0x900 [ 32.232742] ? mas_walk+0x5c7/0x7c0 [ 32.233215] do_vmi_munmap+0x1f1/0x2b0 [ 32.233708] mmap_region+0x1f9/0x2660 [ 32.234195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.234711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.235436] ? __pfx_lock_acquire+0x10/0x10 [ 32.235969] ? __pfx_mmap_region+0x10/0x10 [ 32.236520] ? security_mmap_addr+0x7d/0xa0 [ 32.237052] ? get_unmapped_area+0x1f5/0x3f0 [ 32.237604] do_mmap+0x854/0xf00 [ 32.238062] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.238593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.239165] ksys_mmap_pgoff+0x3af/0x500 [ 32.239679] do_syscall_64+0x3f/0x90 [ 32.240165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.240842] RIP: 0033:0x7fbdac378d82 [ 32.241312] 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 [ 32.243533] RSP: 002b:00007ffcb8019bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.244464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbdac378d82 [ 32.245371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbdab7b2000 [ 32.246262] RBP: 00007fbdab7b2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.247145] R10: 0000000000000812 R11: 0000000000000206 R12: 000056291ec61ec0 [ 32.248022] R13: 00007ffcb8019c10 R14: 00007ffcb8019c40 R15: 00007ffcb8019fa0 [ 32.248928] [ 32.249233] [ 32.249458] Allocated by task 213: [ 32.249909] kasan_save_stack+0x22/0x50 [ 32.250432] kasan_set_track+0x25/0x30 [ 32.250950] __kasan_slab_alloc+0x59/0x70 [ 32.251498] kmem_cache_alloc+0x16b/0x370 [ 32.252036] vm_area_dup+0x20/0x160 [ 32.252516] __split_vma+0x170/0x950 [ 32.253002] split_vma+0xc6/0x110 [ 32.253460] mprotect_fixup+0x8d2/0xb30 [ 32.253982] do_mprotect_pkey+0x87e/0xd40 [ 32.254517] __x64_sys_mprotect+0x78/0xc0 [ 32.255056] do_syscall_64+0x3f/0x90 [ 32.255552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.256213] [ 32.256437] Freed by task 213: [ 32.256874] kasan_save_stack+0x22/0x50 [ 32.257401] kasan_set_track+0x25/0x30 [ 32.257911] kasan_save_free_info+0x2b/0x50 [ 32.258472] __kasan_slab_free+0x10a/0x190 [ 32.259025] kmem_cache_free+0x10d/0x4d0 [ 32.259555] rcu_core+0x8c8/0x2860 [ 32.260018] __do_softirq+0x1b7/0x7d4 [ 32.260517] [ 32.260739] Last potentially related work creation: [ 32.261347] kasan_save_stack+0x22/0x50 [ 32.261867] __kasan_record_aux_stack+0x8e/0xa0 [ 32.262499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.263202] remove_vma+0x139/0x170 [ 32.263679] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.264255] do_vmi_munmap+0x1f1/0x2b0 [ 32.264794] __vm_munmap+0x138/0x3a0 [ 32.265276] __x64_sys_munmap+0x59/0x80 [ 32.265797] do_syscall_64+0x3f/0x90 [ 32.266288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.266946] [ 32.267171] The buggy address belongs to the object at ffff88800f318ae0 [ 32.267171] which belongs to the cache vm_area_struct of size 168 [ 32.268717] The buggy address is located 88 bytes inside of [ 32.268717] freed 168-byte region [ffff88800f318ae0, ffff88800f318b88) [ 32.270187] [ 32.270408] The buggy address belongs to the physical page: [ 32.271100] page:0000000075c0abaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf318 [ 32.272256] memcg:ffff88800fc11a01 [ 32.272735] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.273392] page_type: 0xffffffff() [ 32.273853] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.274805] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc11a01 [ 32.275725] page dumped because: kasan: bad access detected [ 32.276391] [ 32.276613] Memory state around the buggy address: [ 32.277196] ffff88800f318a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.278104] ffff88800f318a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.278994] >ffff88800f318b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.279882] ^ [ 32.280609] ffff88800f318b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.281602] ffff88800f318c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.282601] ================================================================== [ 32.283663] Disabling lock debugging due to kernel taint [ 34.226421] BUG: Bad rss-counter state mm:00000000d216da6e type:MM_FILEPAGES val:33 [ 34.227589] BUG: Bad rss-counter state mm:00000000d216da6e type:MM_ANONPAGES val:22 [ 34.784199] BUG: Bad rss-counter state mm:000000006776923f type:MM_FILEPAGES val:33 [ 34.785376] BUG: Bad rss-counter state mm:000000006776923f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45323' (ECDSA) to the list of known hosts. 2023/06/19 18:42:57 fuzzer started 2023/06/19 18:42:57 dialing manager at localhost:44161 2023/06/19 18:42:57 checking machine... 2023/06/19 18:42:57 checking revisions... [ 35.539288] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:58 testing simple program... [ 35.588514] cgroup: Unknown subsys name 'net' [ 35.633874] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:56 Registers: info registers vcpu 0 RAX=ffffffff864b9d5b RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=1ffffffff0c973ab RDI=ffffffff86053a2c RBP=ffff8880147af750 RSP=ffff8880147af688 R8 =ffffffff864b9d50 R9 =ffff8880147af738 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880147af758 R13=ffff8880147af740 R14=ffff8880147af739 R15=ffff8880147af6f8 RIP=ffffffff81130a5b RFL=00000212 [----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 00007fe88b1c5900 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=00007fe88a658b80 CR3=000000000f79c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=65540d27f67ed0f600000000000ae988 XMM05=dcdab0cd972f5f1300000000001355c0 XMM06=19e9129bd510f2350000000000134458 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffff888017cbf458 RDX=1ffff11002f97e82 RSI=ffffffff813ad6d0 RDI=ffff888017cbf480 RBP=ffff888017cbf450 RSP=ffff888017cbf3a8 R8 =0000000000000001 R9 =ffff888017cbf3f8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888017cbf480 R13=0000000000000000 R14=ffff888016a43680 R15=ffff88800f073600 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 00007fac9d58e900 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=00007fffe83f6000 CR3=0000000018d42000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000