syzkaller login: [ 30.977973] BUG: Bad rss-counter state mm:0000000074605902 type:MM_FILEPAGES val:33 [ 30.979735] BUG: Bad rss-counter state mm:0000000074605902 type:MM_ANONPAGES val:22 [ 31.140239] ================================================================== [ 31.141195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.142321] Read of size 8 at addr ffff88800e911d08 by task sshd/220 [ 31.143430] [ 31.143660] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.144571] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.145570] Call Trace: [ 31.145889] [ 31.146170] dump_stack_lvl+0x91/0xf0 [ 31.146687] print_report+0xcc/0x620 [ 31.147166] ? __virt_addr_valid+0x102/0x340 [ 31.147750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148438] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.149064] kasan_report+0xbe/0xf0 [ 31.149556] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150169] vma_interval_tree_remove+0xc75/0xec0 [ 31.150800] vma_prepare+0xc54/0x11a0 [ 31.151285] __split_vma+0x5af/0x950 [ 31.151756] ? __pfx___split_vma+0x10/0x10 [ 31.152281] ? find_held_lock+0x2c/0x110 [ 31.152907] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.153659] ? lock_is_held_type+0x9f/0x120 [ 31.154376] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.155209] ? mtree_range_walk+0x632/0x900 [ 31.155953] ? mas_walk+0x5c7/0x7c0 [ 31.156590] do_vmi_munmap+0x1f1/0x2b0 [ 31.157241] mmap_region+0x1f9/0x2660 [ 31.157893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.158601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.159560] ? __pfx_lock_acquire+0x10/0x10 [ 31.160293] ? __pfx_mmap_region+0x10/0x10 [ 31.161011] ? security_mmap_addr+0x7d/0xa0 [ 31.161727] ? get_unmapped_area+0x1f5/0x3f0 [ 31.162473] do_mmap+0x854/0xf00 [ 31.163084] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.163749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.164513] ksys_mmap_pgoff+0x3af/0x500 [ 31.165202] do_syscall_64+0x3f/0x90 [ 31.165858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.166778] RIP: 0033:0x7fc281818d82 [ 31.167406] 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 [ 31.170335] RSP: 002b:00007ffe0d6304c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.171586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc281818d82 [ 31.172743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc280c52000 [ 31.173884] RBP: 00007fc280c52000 R08: 0000000000000009 R09: 0000000000001000 [ 31.174934] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a060d6f70 [ 31.175782] R13: 00007ffe0d6304e0 R14: 00007ffe0d630510 R15: 00007ffe0d630870 [ 31.176630] [ 31.176922] [ 31.177136] Allocated by task 213: [ 31.177563] kasan_save_stack+0x22/0x50 [ 31.178064] kasan_set_track+0x25/0x30 [ 31.178559] __kasan_slab_alloc+0x59/0x70 [ 31.179108] kmem_cache_alloc+0x16b/0x370 [ 31.179622] vm_area_dup+0x20/0x160 [ 31.180079] __split_vma+0x170/0x950 [ 31.180546] split_vma+0xc6/0x110 [ 31.180982] mprotect_fixup+0x8d2/0xb30 [ 31.181489] do_mprotect_pkey+0x87e/0xd40 [ 31.182006] __x64_sys_mprotect+0x78/0xc0 [ 31.182526] do_syscall_64+0x3f/0x90 [ 31.183010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183656] [ 31.183872] Freed by task 213: [ 31.184351] kasan_save_stack+0x22/0x50 [ 31.184857] kasan_set_track+0x25/0x30 [ 31.185355] kasan_save_free_info+0x2b/0x50 [ 31.185884] __kasan_slab_free+0x10a/0x190 [ 31.186411] kmem_cache_free+0x10d/0x4d0 [ 31.186941] rcu_core+0x8c8/0x2860 [ 31.187386] __do_softirq+0x1b7/0x7d4 [ 31.187876] [ 31.188090] Last potentially related work creation: [ 31.188673] kasan_save_stack+0x22/0x50 [ 31.189172] __kasan_record_aux_stack+0x8e/0xa0 [ 31.189741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.190379] remove_vma+0x139/0x170 [ 31.190834] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.191388] do_vmi_munmap+0x1f1/0x2b0 [ 31.191878] __vm_munmap+0x138/0x3a0 [ 31.192347] __x64_sys_munmap+0x59/0x80 [ 31.192839] do_syscall_64+0x3f/0x90 [ 31.193313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193954] [ 31.194168] The buggy address belongs to the object at ffff88800e911cb0 [ 31.194168] which belongs to the cache vm_area_struct of size 168 [ 31.195638] The buggy address is located 88 bytes inside of [ 31.195638] freed 168-byte region [ffff88800e911cb0, ffff88800e911d58) [ 31.197040] [ 31.197255] The buggy address belongs to the physical page: [ 31.197910] page:00000000da0240cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe911 [ 31.199088] memcg:ffff888017b4bb01 [ 31.199516] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.200171] page_type: 0xffffffff() [ 31.200629] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.201568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017b4bb01 [ 31.202498] page dumped because: kasan: bad access detected [ 31.203196] [ 31.203425] Memory state around the buggy address: [ 31.204006] ffff88800e911c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.204855] ffff88800e911c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.205715] >ffff88800e911d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.206564] ^ [ 31.207024] ffff88800e911d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.207877] ffff88800e911e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.208719] ================================================================== [ 31.209707] Disabling lock debugging due to kernel taint [ 33.353973] BUG: Bad rss-counter state mm:00000000ea5b81b4 type:MM_FILEPAGES val:33 [ 33.355045] BUG: Bad rss-counter state mm:00000000ea5b81b4 type:MM_ANONPAGES val:22 [ 33.787838] BUG: Bad rss-counter state mm:00000000545fa83e type:MM_FILEPAGES val:33 [ 33.788586] BUG: Bad rss-counter state mm:00000000545fa83e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57043' (ECDSA) to the list of known hosts. 2023/06/21 02:40:44 fuzzer started 2023/06/21 02:40:44 dialing manager at localhost:36067 2023/06/21 02:40:44 checking machine... 2023/06/21 02:40:44 checking revisions... [ 34.508571] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:40:44 testing simple program... [ 34.557026] cgroup: Unknown subsys name 'net' [ 34.601992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:40:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000380 RCX=0000000000000000 RDX=1ffff11002bafb83 RSI=ffffffff83860dfb RDI=ffff888015d7dc18 RBP=ffff888015d7db40 RSP=ffff888019adfae8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000cc0 R13=000000000000012c R14=0000000000000258 R15=ffff888015d7db40 RIP=ffffffff83860e31 RFL=00000246 [---Z-P-] 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 00007f00d0ad9900 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=00007fff4a206000 CR3=0000000016868000 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=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 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=0000000000000001 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=00007fcca6dc6bd0 CR3=000000000c800000 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=16cf47d97f7f4d8ab846b7e4dd4954f5 XMM02=2c67c8bc2e329bc3000000000011b2a8 XMM03=fb795ef6d65770560000000000122490 XMM04=5a7741b22f44cd3800000000000ae988 XMM05=19e9129bd510f23500000000001322e8 XMM06=af519bb204eed44f0000000000131150 XMM07=e042d86d42eb936e0000000000122710 XMM08=4a52497c76fb0e66000000000011b308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000