syzkaller login: [ 32.226312] BUG: Bad rss-counter state mm:000000004738104e type:MM_FILEPAGES val:33 [ 32.227375] BUG: Bad rss-counter state mm:000000004738104e type:MM_ANONPAGES val:22 [ 32.384372] ================================================================== [ 32.385312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.386306] Read of size 8 at addr ffff888018232880 by task sshd/220 [ 32.387262] [ 32.387489] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.388377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.389433] Call Trace: [ 32.389762] [ 32.390096] dump_stack_lvl+0x91/0xf0 [ 32.390615] print_report+0xcc/0x620 [ 32.391122] ? __virt_addr_valid+0x102/0x340 [ 32.391696] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.392332] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.392974] kasan_report+0xbe/0xf0 [ 32.393466] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.394123] vma_interval_tree_remove+0xc75/0xec0 [ 32.394748] vma_prepare+0xc54/0x11a0 [ 32.395246] __split_vma+0x5af/0x950 [ 32.395729] ? __pfx___split_vma+0x10/0x10 [ 32.396275] ? find_held_lock+0x2c/0x110 [ 32.396825] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.397425] ? lock_is_held_type+0x9f/0x120 [ 32.397996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.398625] ? mtree_range_walk+0x632/0x900 [ 32.399192] ? mas_walk+0x5c7/0x7c0 [ 32.399683] do_vmi_munmap+0x1f1/0x2b0 [ 32.400200] mmap_region+0x1f9/0x2660 [ 32.400708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.401244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.401995] ? __pfx_lock_acquire+0x10/0x10 [ 32.402554] ? __pfx_mmap_region+0x10/0x10 [ 32.403104] ? security_mmap_addr+0x7d/0xa0 [ 32.403660] ? get_unmapped_area+0x1f5/0x3f0 [ 32.404227] do_mmap+0x854/0xf00 [ 32.404689] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.405214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.405807] ksys_mmap_pgoff+0x3af/0x500 [ 32.406348] do_syscall_64+0x3f/0x90 [ 32.406839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.407516] RIP: 0033:0x7fec83616d82 [ 32.407990] 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 [ 32.410202] RSP: 002b:00007ffe690595e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.411130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec83616d82 [ 32.412006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec82a50000 [ 32.412892] RBP: 00007fec82a50000 R08: 0000000000000009 R09: 0000000000001000 [ 32.413769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef03d4bb20 [ 32.414658] R13: 00007ffe69059600 R14: 00007ffe69059630 R15: 00007ffe69059990 [ 32.415550] [ 32.415851] [ 32.416074] Allocated by task 213: [ 32.416514] kasan_save_stack+0x22/0x50 [ 32.417028] kasan_set_track+0x25/0x30 [ 32.417534] __kasan_slab_alloc+0x59/0x70 [ 32.418093] kmem_cache_alloc+0x16b/0x370 [ 32.418633] vm_area_dup+0x20/0x160 [ 32.419097] __split_vma+0x170/0x950 [ 32.419582] split_vma+0xc6/0x110 [ 32.420033] mprotect_fixup+0x8d2/0xb30 [ 32.420550] do_mprotect_pkey+0x87e/0xd40 [ 32.421105] __x64_sys_mprotect+0x78/0xc0 [ 32.421642] do_syscall_64+0x3f/0x90 [ 32.422151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.422822] [ 32.423044] Freed by task 213: [ 32.423449] kasan_save_stack+0x22/0x50 [ 32.423969] kasan_set_track+0x25/0x30 [ 32.424486] kasan_save_free_info+0x2b/0x50 [ 32.425039] __kasan_slab_free+0x10a/0x190 [ 32.425586] kmem_cache_free+0x10d/0x4d0 [ 32.426119] rcu_core+0x8c8/0x2860 [ 32.426577] __do_softirq+0x1b7/0x7d4 [ 32.427067] [ 32.427292] Last potentially related work creation: [ 32.427873] kasan_save_stack+0x22/0x50 [ 32.428447] __kasan_record_aux_stack+0x8e/0xa0 [ 32.429019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.429659] remove_vma+0x139/0x170 [ 32.430138] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.430690] do_vmi_munmap+0x1f1/0x2b0 [ 32.431175] __vm_munmap+0x138/0x3a0 [ 32.431655] __x64_sys_munmap+0x59/0x80 [ 32.432172] do_syscall_64+0x3f/0x90 [ 32.432662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.433359] [ 32.433581] Second to last potentially related work creation: [ 32.434291] kasan_save_stack+0x22/0x50 [ 32.434806] __kasan_record_aux_stack+0x8e/0xa0 [ 32.435394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.436058] remove_vma+0x139/0x170 [ 32.436521] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.437092] do_vmi_munmap+0x1f1/0x2b0 [ 32.437594] mmap_region+0x1f9/0x2660 [ 32.438105] do_mmap+0x854/0xf00 [ 32.438549] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.439053] ksys_mmap_pgoff+0x3af/0x500 [ 32.439562] do_syscall_64+0x3f/0x90 [ 32.440042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.440682] [ 32.440901] The buggy address belongs to the object at ffff888018232828 [ 32.440901] which belongs to the cache vm_area_struct of size 168 [ 32.442408] The buggy address is located 88 bytes inside of [ 32.442408] freed 168-byte region [ffff888018232828, ffff8880182328d0) [ 32.443813] [ 32.444034] The buggy address belongs to the physical page: [ 32.444700] page:00000000b4e0793d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18232 [ 32.445793] memcg:ffff888016231601 [ 32.446228] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.446879] page_type: 0xffffffff() [ 32.447328] raw: 0100000000000200 ffff88800879fc80 ffffea0000253840 dead000000000008 [ 32.448247] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016231601 [ 32.449172] page dumped because: kasan: bad access detected [ 32.449878] [ 32.450099] Memory state around the buggy address: [ 32.450698] ffff888018232780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.451594] ffff888018232800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.452447] >ffff888018232880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.453293] ^ [ 32.453705] ffff888018232900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.454573] ffff888018232980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.455417] ================================================================== [ 32.456327] Disabling lock debugging due to kernel taint [ 34.402740] BUG: Bad rss-counter state mm:000000005f5af04d type:MM_FILEPAGES val:33 [ 34.403560] BUG: Bad rss-counter state mm:000000005f5af04d type:MM_ANONPAGES val:22 [ 35.011262] BUG: Bad rss-counter state mm:0000000058ed7a60 type:MM_FILEPAGES val:33 [ 35.012406] BUG: Bad rss-counter state mm:0000000058ed7a60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25365' (ECDSA) to the list of known hosts. 2023/06/20 02:23:40 fuzzer started 2023/06/20 02:23:40 dialing manager at localhost:44161 2023/06/20 02:23:40 checking machine... 2023/06/20 02:23:40 checking revisions... [ 35.692771] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:23:41 testing simple program... [ 35.744692] cgroup: Unknown subsys name 'net' [ 35.802378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806ce09b10 RDX=1ffff1100d9c135a RSI=1ffff1100d9c1350 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce099b0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce09a70 R11=00000000000b6996 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=0000000000000000 R15=ffff88806ce09a70 RIP=ffffffff8113068c 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 00007f8af52b7900 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=00007f8af586c650 CR3=00000000198c4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801985b658 RBX=ffff888016a1b2c8 RCX=1ffff11001ab4344 RDX=dffffc0000000000 RSI=ffff88801b84aae0 RDI=ffff888016a1b2f8 RBP=ffff888016a1b2d8 RSP=ffff888015c27a88 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801b84aaa8 R13=0000000000000000 R14=ffff88800d53b3d8 R15=ffff88800d53b390 RIP=ffffffff8184754c RFL=00000046 [---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 00007f4a5bb49900 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=00007f4a5b06a008 CR3=00000000145a0000 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=d1ce1e4570ee9e92114dac5b61ccc3bf XMM02=ec2efd57dc4c00df000000000011c8a8 XMM03=df86b57f9c3be527000000000011c978 XMM04=072509fdfc810f5300000000000ae988 XMM05=0f3f6cabadb5800b0000000000135d18 XMM06=19e9129bd510f2350000000000134bb0 XMM07=fb795ef6d65770560000000000123d80 XMM08=2c67c8bc2e329bc3000000000011c918 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000