syzkaller login: [ 38.719214] BUG: Bad rss-counter state mm:00000000904e705d type:MM_FILEPAGES val:33 [ 38.720521] BUG: Bad rss-counter state mm:00000000904e705d type:MM_ANONPAGES val:22 [ 38.871662] ================================================================== [ 38.872606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.873562] Read of size 8 at addr ffff88800d6143f8 by task sshd/218 [ 38.874472] [ 38.874715] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.875596] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.876593] Call Trace: [ 38.876925] [ 38.877219] dump_stack_lvl+0x91/0xf0 [ 38.877735] print_report+0xcc/0x620 [ 38.878271] ? __virt_addr_valid+0x102/0x340 [ 38.878839] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879469] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880100] kasan_report+0xbe/0xf0 [ 38.880583] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881217] vma_interval_tree_remove+0xc75/0xec0 [ 38.881837] vma_prepare+0xc54/0x11a0 [ 38.882345] __split_vma+0x5af/0x950 [ 38.882826] ? __pfx___split_vma+0x10/0x10 [ 38.883359] ? find_held_lock+0x2c/0x110 [ 38.883895] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.884472] ? lock_is_held_type+0x9f/0x120 [ 38.885024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.885652] ? mtree_range_walk+0x632/0x900 [ 38.886228] ? mas_walk+0x5c7/0x7c0 [ 38.886714] do_vmi_munmap+0x1f1/0x2b0 [ 38.887226] mmap_region+0x1f9/0x2660 [ 38.887729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.888262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.889006] ? __pfx_lock_acquire+0x10/0x10 [ 38.889562] ? __pfx_mmap_region+0x10/0x10 [ 38.890116] ? security_mmap_addr+0x7d/0xa0 [ 38.890656] ? get_unmapped_area+0x1f5/0x3f0 [ 38.891218] do_mmap+0x854/0xf00 [ 38.891675] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.892190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.892769] ksys_mmap_pgoff+0x3af/0x500 [ 38.893294] do_syscall_64+0x3f/0x90 [ 38.893796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.894471] RIP: 0033:0x7f2045eead82 [ 38.894944] 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 [ 38.897135] RSP: 002b:00007ffcc096b798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.898084] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2045eead82 [ 38.898956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2045324000 [ 38.899820] RBP: 00007f2045324000 R08: 0000000000000009 R09: 0000000000001000 [ 38.900689] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2a07e8f60 [ 38.901557] R13: 00007ffcc096b7b0 R14: 00007ffcc096b7e0 R15: 00007ffcc096bb40 [ 38.902451] [ 38.902745] [ 38.902963] Allocated by task 211: [ 38.903404] kasan_save_stack+0x22/0x50 [ 38.903925] kasan_set_track+0x25/0x30 [ 38.904430] __kasan_slab_alloc+0x59/0x70 [ 38.904967] kmem_cache_alloc+0x16b/0x370 [ 38.905497] vm_area_dup+0x20/0x160 [ 38.905969] __split_vma+0x170/0x950 [ 38.906461] split_vma+0xc6/0x110 [ 38.906906] mprotect_fixup+0x8d2/0xb30 [ 38.907420] do_mprotect_pkey+0x87e/0xd40 [ 38.907949] __x64_sys_mprotect+0x78/0xc0 [ 38.908480] do_syscall_64+0x3f/0x90 [ 38.908964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909621] [ 38.909842] Freed by task 13: [ 38.910248] kasan_save_stack+0x22/0x50 [ 38.910772] kasan_set_track+0x25/0x30 [ 38.911275] kasan_save_free_info+0x2b/0x50 [ 38.911821] __kasan_slab_free+0x10a/0x190 [ 38.912366] kmem_cache_free+0x10d/0x4d0 [ 38.912888] rcu_core+0x8c8/0x2860 [ 38.913337] __do_softirq+0x1b7/0x7d4 [ 38.913841] [ 38.914076] Last potentially related work creation: [ 38.914676] kasan_save_stack+0x22/0x50 [ 38.915275] __kasan_record_aux_stack+0x8e/0xa0 [ 38.915876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.916536] remove_vma+0x139/0x170 [ 38.916999] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.917573] do_vmi_munmap+0x1f1/0x2b0 [ 38.918095] __vm_munmap+0x138/0x3a0 [ 38.918576] __x64_sys_munmap+0x59/0x80 [ 38.919097] do_syscall_64+0x3f/0x90 [ 38.919589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920261] [ 38.920479] Second to last potentially related work creation: [ 38.921200] kasan_save_stack+0x22/0x50 [ 38.921726] __kasan_record_aux_stack+0x8e/0xa0 [ 38.922352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.923023] remove_vma+0x139/0x170 [ 38.923499] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.924071] do_vmi_munmap+0x1f1/0x2b0 [ 38.924566] mmap_region+0x1f9/0x2660 [ 38.925066] do_mmap+0x854/0xf00 [ 38.925507] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.926008] ksys_mmap_pgoff+0x3af/0x500 [ 38.926529] do_syscall_64+0x3f/0x90 [ 38.927034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927694] [ 38.927912] The buggy address belongs to the object at ffff88800d6143a0 [ 38.927912] which belongs to the cache vm_area_struct of size 168 [ 38.929419] The buggy address is located 88 bytes inside of [ 38.929419] freed 168-byte region [ffff88800d6143a0, ffff88800d614448) [ 38.930878] [ 38.931097] The buggy address belongs to the physical page: [ 38.931789] page:0000000035bc653c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd614 [ 38.932901] memcg:ffff88800d35b001 [ 38.933341] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.934084] page_type: 0xffffffff() [ 38.934549] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae880 dead000000000003 [ 38.935493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d35b001 [ 38.936419] page dumped because: kasan: bad access detected [ 38.937103] [ 38.937323] Memory state around the buggy address: [ 38.937931] ffff88800d614280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.938828] ffff88800d614300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.939701] >ffff88800d614380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.940579] ^ [ 38.941445] ffff88800d614400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.942342] ffff88800d614480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.943223] ================================================================== [ 38.944196] Disabling lock debugging due to kernel taint [ 41.071908] BUG: Bad rss-counter state mm:000000007cc7da2b type:MM_FILEPAGES val:33 [ 41.073337] BUG: Bad rss-counter state mm:000000007cc7da2b type:MM_ANONPAGES val:22 [ 41.574755] BUG: Bad rss-counter state mm:00000000c8a95e6f type:MM_FILEPAGES val:33 [ 41.575977] BUG: Bad rss-counter state mm:00000000c8a95e6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38912' (ECDSA) to the list of known hosts. 2023/06/21 01:20:54 fuzzer started 2023/06/21 01:20:54 dialing manager at localhost:36067 2023/06/21 01:20:54 checking machine... 2023/06/21 01:20:54 checking revisions... [ 42.318793] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:20:54 testing simple program... [ 42.367200] cgroup: Unknown subsys name 'net' [ 42.411354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:20:54 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f06f9b8 RSP=ffff88800f06f8f0 R8 =ffffffff864bbb58 R9 =ffff88800f06f9a0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800f06f9c0 R13=ffff88800f06f9a8 R14=ffff88800f06ff58 R15=ffff88800f06f960 RIP=ffffffff81130baa 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 00007fbb6a7c1900 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=00007fbb6ad78618 CR3=000000001c9ec000 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=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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f61f5eac670 CR3=000000000ef5e000 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=2034353a30323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a30323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000