syzkaller login: [ 40.219616] BUG: Bad rss-counter state mm:0000000003f35e71 type:MM_FILEPAGES val:33 [ 40.220197] BUG: Bad rss-counter state mm:0000000003f35e71 type:MM_ANONPAGES val:22 [ 40.327877] ================================================================== [ 40.328957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.329899] Read of size 8 at addr ffff88800d4ff310 by task sshd/219 [ 40.330330] [ 40.330452] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.330926] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.331474] Call Trace: [ 40.331652] [ 40.331810] dump_stack_lvl+0x91/0xf0 [ 40.332078] print_report+0xcc/0x620 [ 40.332343] ? __virt_addr_valid+0x102/0x340 [ 40.332652] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.332987] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.333332] kasan_report+0xbe/0xf0 [ 40.333592] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.333931] vma_interval_tree_remove+0xc75/0xec0 [ 40.334262] vma_prepare+0xc54/0x11a0 [ 40.334524] __split_vma+0x5af/0x950 [ 40.334783] ? __pfx___split_vma+0x10/0x10 [ 40.335071] ? find_held_lock+0x2c/0x110 [ 40.335362] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.335673] ? lock_is_held_type+0x9f/0x120 [ 40.335969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.336296] ? mtree_range_walk+0x632/0x900 [ 40.336600] ? mas_walk+0x5c7/0x7c0 [ 40.336860] do_vmi_munmap+0x1f1/0x2b0 [ 40.337139] mmap_region+0x1f9/0x2660 [ 40.337402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.337682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.338088] ? __pfx_lock_acquire+0x10/0x10 [ 40.338378] ? __pfx_mmap_region+0x10/0x10 [ 40.338677] ? security_mmap_addr+0x7d/0xa0 [ 40.338997] ? get_unmapped_area+0x1f5/0x3f0 [ 40.339324] do_mmap+0x854/0xf00 [ 40.339586] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.339876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.340214] ksys_mmap_pgoff+0x3af/0x500 [ 40.340516] do_syscall_64+0x3f/0x90 [ 40.340792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.341186] RIP: 0033:0x7fef6d10fd82 [ 40.341453] 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 [ 40.342724] RSP: 002b:00007ffd9317c688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.343255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef6d10fd82 [ 40.343771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef6c549000 [ 40.344284] RBP: 00007fef6c549000 R08: 0000000000000009 R09: 0000000000001000 [ 40.344795] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a7c665ec0 [ 40.345300] R13: 00007ffd9317c6a0 R14: 00007ffd9317c6d0 R15: 00007ffd9317ca30 [ 40.345808] [ 40.345975] [ 40.346097] Allocated by task 212: [ 40.346349] kasan_save_stack+0x22/0x50 [ 40.346643] kasan_set_track+0x25/0x30 [ 40.346933] __kasan_slab_alloc+0x59/0x70 [ 40.347241] kmem_cache_alloc+0x16b/0x370 [ 40.347546] vm_area_dup+0x20/0x160 [ 40.347809] __split_vma+0x170/0x950 [ 40.348084] split_vma+0xc6/0x110 [ 40.348350] mprotect_fixup+0x8d2/0xb30 [ 40.348650] do_mprotect_pkey+0x87e/0xd40 [ 40.348958] __x64_sys_mprotect+0x78/0xc0 [ 40.349278] do_syscall_64+0x3f/0x90 [ 40.349550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.349928] [ 40.350056] Freed by task 212: [ 40.350289] kasan_save_stack+0x22/0x50 [ 40.350587] kasan_set_track+0x25/0x30 [ 40.350874] kasan_save_free_info+0x2b/0x50 [ 40.351191] __kasan_slab_free+0x10a/0x190 [ 40.351508] kmem_cache_free+0x10d/0x4d0 [ 40.351809] rcu_core+0x8c8/0x2860 [ 40.352071] __do_softirq+0x1b7/0x7d4 [ 40.352356] [ 40.352482] Last potentially related work creation: [ 40.352838] kasan_save_stack+0x22/0x50 [ 40.353146] __kasan_record_aux_stack+0x8e/0xa0 [ 40.353473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.353848] remove_vma+0x139/0x170 [ 40.354120] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.354454] do_vmi_munmap+0x1f1/0x2b0 [ 40.354744] __vm_munmap+0x138/0x3a0 [ 40.355018] __x64_sys_munmap+0x59/0x80 [ 40.355307] do_syscall_64+0x3f/0x90 [ 40.355581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.355960] [ 40.356089] Second to last potentially related work creation: [ 40.356488] kasan_save_stack+0x22/0x50 [ 40.356782] __kasan_record_aux_stack+0x8e/0xa0 [ 40.357126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.357497] remove_vma+0x139/0x170 [ 40.357768] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.358094] do_vmi_munmap+0x1f1/0x2b0 [ 40.358371] mmap_region+0x1f9/0x2660 [ 40.358654] do_mmap+0x854/0xf00 [ 40.358907] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.359193] ksys_mmap_pgoff+0x3af/0x500 [ 40.359490] do_syscall_64+0x3f/0x90 [ 40.359770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.360148] [ 40.360274] The buggy address belongs to the object at ffff88800d4ff2b8 [ 40.360274] which belongs to the cache vm_area_struct of size 168 [ 40.361164] The buggy address is located 88 bytes inside of [ 40.361164] freed 168-byte region [ffff88800d4ff2b8, ffff88800d4ff360) [ 40.361988] [ 40.362116] The buggy address belongs to the physical page: [ 40.362516] page:000000004b74aa40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4ff [ 40.363168] memcg:ffff88800d2a1a01 [ 40.363421] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.363833] page_type: 0xffffffff() [ 40.364107] raw: 0100000000000200 ffff88800879fc80 ffffea00003ac880 dead000000000005 [ 40.364653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2a1a01 [ 40.365205] page dumped because: kasan: bad access detected [ 40.365598] [ 40.365722] Memory state around the buggy address: [ 40.366066] ffff88800d4ff200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.366574] ffff88800d4ff280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.367100] >ffff88800d4ff300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.367611] ^ [ 40.367887] ffff88800d4ff380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.368399] ffff88800d4ff400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.368896] ================================================================== [ 40.369466] Disabling lock debugging due to kernel taint [ 42.935674] BUG: Bad rss-counter state mm:00000000f6360f54 type:MM_FILEPAGES val:33 [ 42.936986] BUG: Bad rss-counter state mm:00000000f6360f54 type:MM_ANONPAGES val:22 [ 43.405187] BUG: Bad rss-counter state mm:00000000c5e6444e type:MM_FILEPAGES val:33 [ 43.406176] BUG: Bad rss-counter state mm:00000000c5e6444e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16323' (ECDSA) to the list of known hosts. 2023/06/20 00:55:51 fuzzer started 2023/06/20 00:55:51 dialing manager at localhost:44161 2023/06/20 00:55:51 checking machine... 2023/06/20 00:55:51 checking revisions... [ 44.139441] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:55:51 testing simple program... [ 44.190565] cgroup: Unknown subsys name 'net' [ 44.227278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:55:49 Registers: info registers vcpu 0 RAX=0000000000024249 RBX=0000000000000001 RCX=ffffffff818cfd8f RDX=0000000000024249 RSI=0000000000008cfd RDI=ffffffff8650afb8 RBP=ffff888016457920 RSP=ffff888016457858 R8 =0000000000000000 R9 =ffff888016457908 R10=0000000000038001 R11=0000000000024249 R12=ffff888016457928 R13=ffff888016457910 R14=ffff888016457909 R15=ffff8880164578c8 RIP=ffffffff81130837 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 00007f71c0dd9900 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=00007f71c1390618 CR3=0000000016ab0000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=1ffff1100d9e1354 RSI=ffff88806cf09a68 RDI=ffff88806cf09aa0 RBP=ffff88806cf09b30 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff81131c83 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 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=00007f5b1d971e90 CR3=000000000c4ec000 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=7b2f6d7355e25bb14b4359df9dbd73ce XMM02=ec2efd57dc4c00df000000000011d380 XMM03=7ac061dda47fbd8a000000000011d450 XMM04=bb102bcf0382313000000000000ae988 XMM05=dfcdbad4f1609c370000000000134e60 XMM06=fca904f7af4c9a7a0000000000134018 XMM07=e042d86d42eb936e0000000000124490 XMM08=7ac061dda47fbd8a000000000011d450 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000