syzkaller login: [ 38.874331] BUG: Bad rss-counter state mm:00000000d2b67970 type:MM_FILEPAGES val:33 [ 38.877004] BUG: Bad rss-counter state mm:00000000d2b67970 type:MM_ANONPAGES val:22 [ 39.076309] ================================================================== [ 39.076977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.077659] Read of size 8 at addr ffff888018d146b0 by task sshd/222 [ 39.078221] [ 39.078388] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.080645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.082699] Call Trace: [ 39.083351] [ 39.083858] dump_stack_lvl+0x91/0xf0 [ 39.084814] print_report+0xcc/0x620 [ 39.085738] ? __virt_addr_valid+0x102/0x340 [ 39.087161] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.088374] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.089613] kasan_report+0xbe/0xf0 [ 39.090547] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.091782] vma_interval_tree_remove+0xc75/0xec0 [ 39.092923] vma_prepare+0xc54/0x11a0 [ 39.093845] __split_vma+0x5af/0x950 [ 39.094783] ? __pfx___split_vma+0x10/0x10 [ 39.095823] ? find_held_lock+0x2c/0x110 [ 39.096844] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.097969] ? lock_is_held_type+0x9f/0x120 [ 39.099049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.100274] ? mtree_range_walk+0x632/0x900 [ 39.101337] ? mas_walk+0x5c7/0x7c0 [ 39.102259] do_vmi_munmap+0x1f1/0x2b0 [ 39.103239] mmap_region+0x1f9/0x2660 [ 39.104169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.105144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.106615] ? __pfx_lock_acquire+0x10/0x10 [ 39.107679] ? __pfx_mmap_region+0x10/0x10 [ 39.108700] ? security_mmap_addr+0x7d/0xa0 [ 39.109727] ? get_unmapped_area+0x1f5/0x3f0 [ 39.110803] do_mmap+0x854/0xf00 [ 39.111630] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.112581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.113651] ksys_mmap_pgoff+0x3af/0x500 [ 39.114674] do_syscall_64+0x3f/0x90 [ 39.115614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.116892] RIP: 0033:0x7fc4fe664d82 [ 39.117787] 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 [ 39.122311] RSP: 002b:00007fffa1703728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.124152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4fe664d82 [ 39.125829] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4fda9e000 [ 39.127605] RBP: 00007fc4fda9e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.129335] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564554b10f70 [ 39.131046] R13: 00007fffa1703740 R14: 00007fffa1703770 R15: 00007fffa1703ad0 [ 39.132790] [ 39.133376] [ 39.133753] Allocated by task 213: [ 39.134668] kasan_save_stack+0x22/0x50 [ 39.135634] kasan_set_track+0x25/0x30 [ 39.136629] __kasan_slab_alloc+0x59/0x70 [ 39.137641] kmem_cache_alloc+0x16b/0x370 [ 39.138670] vm_area_dup+0x20/0x160 [ 39.139541] __split_vma+0x170/0x950 [ 39.140444] split_vma+0xc6/0x110 [ 39.141301] mprotect_fixup+0x8d2/0xb30 [ 39.142282] do_mprotect_pkey+0x87e/0xd40 [ 39.143305] __x64_sys_mprotect+0x78/0xc0 [ 39.144284] do_syscall_64+0x3f/0x90 [ 39.145205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.146492] [ 39.146869] Freed by task 19: [ 39.147620] kasan_save_stack+0x22/0x50 [ 39.148592] kasan_set_track+0x25/0x30 [ 39.149547] kasan_save_free_info+0x2b/0x50 [ 39.150619] __kasan_slab_free+0x10a/0x190 [ 39.151651] kmem_cache_free+0x10d/0x4d0 [ 39.152641] rcu_core+0x8c8/0x2860 [ 39.153504] __do_softirq+0x1b7/0x7d4 [ 39.154483] [ 39.154859] Last potentially related work creation: [ 39.156031] kasan_save_stack+0x22/0x50 [ 39.156989] __kasan_record_aux_stack+0x8e/0xa0 [ 39.158211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.159461] remove_vma+0x139/0x170 [ 39.160335] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.161387] do_vmi_munmap+0x1f1/0x2b0 [ 39.162407] __vm_munmap+0x138/0x3a0 [ 39.163335] __x64_sys_munmap+0x59/0x80 [ 39.164295] do_syscall_64+0x3f/0x90 [ 39.165207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.166449] [ 39.166843] Second to last potentially related work creation: [ 39.168261] kasan_save_stack+0x22/0x50 [ 39.169255] __kasan_record_aux_stack+0x8e/0xa0 [ 39.170425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.171688] remove_vma+0x139/0x170 [ 39.172573] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.173643] do_vmi_munmap+0x1f1/0x2b0 [ 39.174619] mmap_region+0x1f9/0x2660 [ 39.175543] do_mmap+0x854/0xf00 [ 39.176369] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.177314] ksys_mmap_pgoff+0x3af/0x500 [ 39.178278] do_syscall_64+0x3f/0x90 [ 39.179208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.180444] [ 39.180818] The buggy address belongs to the object at ffff888018d14658 [ 39.180818] which belongs to the cache vm_area_struct of size 168 [ 39.183872] The buggy address is located 88 bytes inside of [ 39.183872] freed 168-byte region [ffff888018d14658, ffff888018d14700) [ 39.186800] [ 39.187228] The buggy address belongs to the physical page: [ 39.188545] page:0000000006e1f1b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d14 [ 39.190793] memcg:ffff888016802c01 [ 39.191638] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.193013] page_type: 0xffffffff() [ 39.193884] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.195753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016802c01 [ 39.197619] page dumped because: kasan: bad access detected [ 39.198976] [ 39.199403] Memory state around the buggy address: [ 39.200546] ffff888018d14580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.202320] ffff888018d14600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.204033] >ffff888018d14680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.205844] ^ [ 39.207033] ffff888018d14700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.208788] ffff888018d14780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.210569] ================================================================== [ 39.234779] Disabling lock debugging due to kernel taint [ 46.556635] BUG: Bad rss-counter state mm:00000000f82b67dc type:MM_FILEPAGES val:33 [ 46.557371] BUG: Bad rss-counter state mm:00000000f82b67dc type:MM_ANONPAGES val:22 [ 47.271524] BUG: Bad rss-counter state mm:000000007bf18a1c type:MM_FILEPAGES val:33 [ 47.272207] BUG: Bad rss-counter state mm:000000007bf18a1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24970' (ECDSA) to the list of known hosts. 2023/06/21 08:21:13 fuzzer started 2023/06/21 08:21:14 dialing manager at localhost:36067 2023/06/21 08:21:14 checking machine... 2023/06/21 08:21:14 checking revisions... [ 48.169124] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:21:14 testing simple program... [ 48.223589] cgroup: Unknown subsys name 'net' [ 48.308517] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:21:13 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=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 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=00007ffcfc5792c8 CR3=0000000005482000 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=00007fb0bcc225100000562fb6272790 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff844c3575 RCX=0000000000000001 RDX=1ffff1100284ce26 RSI=ffff8880142676a0 RDI=ffffffff844c3575 RBP=ffff888014267130 RSP=ffff8880142670a8 R8 =0000000000000001 R9 =ffff888014267118 R10=0000000000038001 R11=00000000000b3ef5 R12=ffff8880142671a0 R13=0000000000000000 R14=ffff888016a70000 R15=ffff88800e504850 RIP=ffffffff811fc7a0 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 00007f9fee119900 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=00007f9fee0c3008 CR3=000000001a88e000 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