syzkaller login: [ 51.133074] BUG: Bad rss-counter state mm:00000000c5a63e02 type:MM_FILEPAGES val:33 [ 51.134487] BUG: Bad rss-counter state mm:00000000c5a63e02 type:MM_ANONPAGES val:22 [ 51.322998] ================================================================== [ 51.324023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.325226] Read of size 8 at addr ffff888016b773f8 by task sshd/219 [ 51.326092] [ 51.326336] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.327325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.328419] Call Trace: [ 51.328778] [ 51.329124] dump_stack_lvl+0x91/0xf0 [ 51.329687] print_report+0xcc/0x620 [ 51.330256] ? __virt_addr_valid+0x102/0x340 [ 51.330881] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.331576] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.332270] kasan_report+0xbe/0xf0 [ 51.332806] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.333522] vma_interval_tree_remove+0xc75/0xec0 [ 51.334202] vma_prepare+0xc54/0x11a0 [ 51.334738] __split_vma+0x5af/0x950 [ 51.335275] ? __pfx___split_vma+0x10/0x10 [ 51.335879] ? find_held_lock+0x2c/0x110 [ 51.336468] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.337136] ? lock_is_held_type+0x9f/0x120 [ 51.337742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.338426] ? mtree_range_walk+0x632/0x900 [ 51.339051] ? mas_walk+0x5c7/0x7c0 [ 51.339576] do_vmi_munmap+0x1f1/0x2b0 [ 51.340136] mmap_region+0x1f9/0x2660 [ 51.340678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.341267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.342077] ? __pfx_lock_acquire+0x10/0x10 [ 51.342693] ? __pfx_mmap_region+0x10/0x10 [ 51.343305] ? security_mmap_addr+0x7d/0xa0 [ 51.343921] ? get_unmapped_area+0x1f5/0x3f0 [ 51.344559] do_mmap+0x854/0xf00 [ 51.345091] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.345664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.346322] ksys_mmap_pgoff+0x3af/0x500 [ 51.346910] do_syscall_64+0x3f/0x90 [ 51.347460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.348212] RIP: 0033:0x7efca47f2d82 [ 51.348752] 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 [ 51.351241] RSP: 002b:00007ffc319ccdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.352285] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efca47f2d82 [ 51.353267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efca3c2c000 [ 51.354232] RBP: 00007efca3c2c000 R08: 0000000000000009 R09: 0000000000001000 [ 51.355209] R10: 0000000000000812 R11: 0000000000000206 R12: 000056027b957f70 [ 51.356187] R13: 00007ffc319cce10 R14: 00007ffc319cce40 R15: 00007ffc319cd1a0 [ 51.357179] [ 51.357518] [ 51.357764] Allocated by task 212: [ 51.358256] kasan_save_stack+0x22/0x50 [ 51.358839] kasan_set_track+0x25/0x30 [ 51.359404] __kasan_slab_alloc+0x59/0x70 [ 51.360003] kmem_cache_alloc+0x16b/0x370 [ 51.360595] vm_area_dup+0x20/0x160 [ 51.361124] __split_vma+0x170/0x950 [ 51.361659] split_vma+0xc6/0x110 [ 51.362162] mprotect_fixup+0x8d2/0xb30 [ 51.362741] do_mprotect_pkey+0x87e/0xd40 [ 51.363341] __x64_sys_mprotect+0x78/0xc0 [ 51.363934] do_syscall_64+0x3f/0x90 [ 51.364478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.365235] [ 51.365481] Freed by task 212: [ 51.365932] kasan_save_stack+0x22/0x50 [ 51.366502] kasan_set_track+0x25/0x30 [ 51.367065] kasan_save_free_info+0x2b/0x50 [ 51.367670] __kasan_slab_free+0x10a/0x190 [ 51.368269] kmem_cache_free+0x10d/0x4d0 [ 51.368848] rcu_core+0x8c8/0x2860 [ 51.369352] __do_softirq+0x1b7/0x7d4 [ 51.369891] [ 51.370139] Last potentially related work creation: [ 51.370811] kasan_save_stack+0x22/0x50 [ 51.371385] __kasan_record_aux_stack+0x8e/0xa0 [ 51.372033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.372756] remove_vma+0x139/0x170 [ 51.373285] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.373921] do_vmi_munmap+0x1f1/0x2b0 [ 51.374462] __vm_munmap+0x138/0x3a0 [ 51.375019] __x64_sys_munmap+0x59/0x80 [ 51.375575] do_syscall_64+0x3f/0x90 [ 51.376111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.376846] [ 51.377090] Second to last potentially related work creation: [ 51.377877] kasan_save_stack+0x22/0x50 [ 51.378447] __kasan_record_aux_stack+0x8e/0xa0 [ 51.379097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.379827] remove_vma+0x139/0x170 [ 51.380341] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.380994] do_vmi_munmap+0x1f1/0x2b0 [ 51.381538] mmap_region+0x1f9/0x2660 [ 51.382077] do_mmap+0x854/0xf00 [ 51.382557] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.383112] ksys_mmap_pgoff+0x7d/0x500 [ 51.383698] do_syscall_64+0x3f/0x90 [ 51.384228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.384952] [ 51.385194] The buggy address belongs to the object at ffff888016b773a0 [ 51.385194] which belongs to the cache vm_area_struct of size 168 [ 51.386845] The buggy address is located 88 bytes inside of [ 51.386845] freed 168-byte region [ffff888016b773a0, ffff888016b77448) [ 51.388417] [ 51.388658] The buggy address belongs to the physical page: [ 51.389404] page:00000000aab3119b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b77 [ 51.390624] memcg:ffff888015c3b501 [ 51.391102] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.391822] page_type: 0xffffffff() [ 51.392312] raw: 0100000000000200 ffff88800879fc80 ffffea00003ab800 dead000000000004 [ 51.393329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c3b501 [ 51.394316] page dumped because: kasan: bad access detected [ 51.395039] [ 51.395272] Memory state around the buggy address: [ 51.395898] ffff888016b77280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 51.396833] ffff888016b77300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 51.397761] >ffff888016b77380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 51.398682] ^ [ 51.399586] ffff888016b77400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 51.400514] ffff888016b77480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.401429] ================================================================== [ 51.402766] Disabling lock debugging due to kernel taint [ 53.335146] BUG: Bad rss-counter state mm:0000000023760cfa type:MM_FILEPAGES val:33 [ 53.336168] BUG: Bad rss-counter state mm:0000000023760cfa type:MM_ANONPAGES val:22 [ 53.865551] BUG: Bad rss-counter state mm:00000000ba563070 type:MM_FILEPAGES val:33 [ 53.866734] BUG: Bad rss-counter state mm:00000000ba563070 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33620' (ECDSA) to the list of known hosts. 2023/06/20 04:53:27 fuzzer started 2023/06/20 04:53:27 dialing manager at localhost:44161 2023/06/20 04:53:27 checking machine... 2023/06/20 04:53:27 checking revisions... [ 54.543344] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:27 testing simple program... [ 54.598586] cgroup: Unknown subsys name 'net' [ 54.638051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:06 Registers: info registers vcpu 0 RAX=ffff888019850f58 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000018 RSI=ffffffff83664f38 RDI=0000000000000004 RBP=0000000000000018 RSP=ffff888017d2f468 R8 =0000000000000004 R9 =0000000000000f70 R10=0000000000001ec0 R11=000012fc00001176 R12=ffff888016a60a00 R13=00000000000000e5 R14=0000000000000002 R15=0000000000000014 RIP=ffffffff838636b4 RFL=00000293 [--S-A-C] 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 00007f78ddb38900 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=00007f78de0ef618 CR3=000000000ee9e000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f567261e5c0 CR3=0000000017c7a000 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=2036323a33353a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a33353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000