syzkaller login: [ 42.211577] BUG: Bad rss-counter state mm:00000000cda5d8b9 type:MM_FILEPAGES val:33 [ 42.212620] BUG: Bad rss-counter state mm:00000000cda5d8b9 type:MM_ANONPAGES val:22 [ 42.386435] ================================================================== [ 42.387323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.388232] Read of size 8 at addr ffff88800ea4e4e0 by task sshd/219 [ 42.388976] [ 42.389265] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.390140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.391073] Call Trace: [ 42.391376] [ 42.391673] dump_stack_lvl+0x91/0xf0 [ 42.392138] print_report+0xcc/0x620 [ 42.392595] ? __virt_addr_valid+0x102/0x340 [ 42.393136] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.393754] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.394350] kasan_report+0xbe/0xf0 [ 42.394832] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.395418] vma_interval_tree_remove+0xc75/0xec0 [ 42.396012] vma_prepare+0xc54/0x11a0 [ 42.396474] __split_vma+0x5af/0x950 [ 42.396959] ? __pfx___split_vma+0x10/0x10 [ 42.397485] ? find_held_lock+0x2c/0x110 [ 42.398060] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.398840] ? lock_is_held_type+0x9f/0x120 [ 42.399587] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.400422] ? mtree_range_walk+0x632/0x900 [ 42.401181] ? mas_walk+0x5c7/0x7c0 [ 42.401806] do_vmi_munmap+0x1f1/0x2b0 [ 42.402334] mmap_region+0x1f9/0x2660 [ 42.402837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.403332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.404068] ? __pfx_lock_acquire+0x10/0x10 [ 42.404606] ? __pfx_mmap_region+0x10/0x10 [ 42.405149] ? security_mmap_addr+0x7d/0xa0 [ 42.405711] ? get_unmapped_area+0x1f5/0x3f0 [ 42.406276] do_mmap+0x854/0xf00 [ 42.406750] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.407244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.407885] ksys_mmap_pgoff+0x3af/0x500 [ 42.408583] do_syscall_64+0x3f/0x90 [ 42.409076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.409735] RIP: 0033:0x7fd9ed066d82 [ 42.410197] 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 [ 42.412373] RSP: 002b:00007fff153d3138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.413291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9ed066d82 [ 42.414153] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9ec4a0000 [ 42.415043] RBP: 00007fd9ec4a0000 R08: 0000000000000009 R09: 0000000000001000 [ 42.415909] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ddf41eec0 [ 42.416766] R13: 00007fff153d3150 R14: 00007fff153d3180 R15: 00007fff153d34e0 [ 42.417629] [ 42.417918] [ 42.418142] Allocated by task 212: [ 42.418568] kasan_save_stack+0x22/0x50 [ 42.419096] kasan_set_track+0x25/0x30 [ 42.419591] __kasan_slab_alloc+0x59/0x70 [ 42.420149] kmem_cache_alloc+0x16b/0x370 [ 42.420680] vm_area_dup+0x20/0x160 [ 42.421135] __split_vma+0x170/0x950 [ 42.421595] split_vma+0xc6/0x110 [ 42.422046] mprotect_fixup+0x8d2/0xb30 [ 42.422552] do_mprotect_pkey+0x87e/0xd40 [ 42.423071] __x64_sys_mprotect+0x78/0xc0 [ 42.423575] do_syscall_64+0x3f/0x90 [ 42.424039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.424668] [ 42.424878] Freed by task 212: [ 42.425255] kasan_save_stack+0x22/0x50 [ 42.425745] kasan_set_track+0x25/0x30 [ 42.426224] kasan_save_free_info+0x2b/0x50 [ 42.426761] __kasan_slab_free+0x10a/0x190 [ 42.427264] kmem_cache_free+0x10d/0x4d0 [ 42.427763] rcu_core+0x8c8/0x2860 [ 42.428187] __do_softirq+0x1b7/0x7d4 [ 42.428653] [ 42.428868] Last potentially related work creation: [ 42.429419] kasan_save_stack+0x22/0x50 [ 42.429919] __kasan_record_aux_stack+0x8e/0xa0 [ 42.430476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.431118] remove_vma+0x139/0x170 [ 42.431563] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.432125] do_vmi_munmap+0x1f1/0x2b0 [ 42.432627] __vm_munmap+0x138/0x3a0 [ 42.433101] __x64_sys_munmap+0x59/0x80 [ 42.433595] do_syscall_64+0x3f/0x90 [ 42.434107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.434785] [ 42.434998] Second to last potentially related work creation: [ 42.435693] kasan_save_stack+0x22/0x50 [ 42.436200] __kasan_record_aux_stack+0x8e/0xa0 [ 42.436795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.437434] remove_vma+0x139/0x170 [ 42.437900] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.438466] do_vmi_munmap+0x1f1/0x2b0 [ 42.438981] mmap_region+0x1f9/0x2660 [ 42.439457] do_mmap+0x854/0xf00 [ 42.439899] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.440392] ksys_mmap_pgoff+0x3af/0x500 [ 42.440896] do_syscall_64+0x3f/0x90 [ 42.441374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.442012] [ 42.442234] The buggy address belongs to the object at ffff88800ea4e488 [ 42.442234] which belongs to the cache vm_area_struct of size 168 [ 42.443737] The buggy address is located 88 bytes inside of [ 42.443737] freed 168-byte region [ffff88800ea4e488, ffff88800ea4e530) [ 42.445171] [ 42.445383] The buggy address belongs to the physical page: [ 42.446046] page:000000002a27a61a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea4e [ 42.447177] memcg:ffff88800e655c01 [ 42.447595] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.448294] page_type: 0xffffffff() [ 42.448755] raw: 0100000000000200 ffff88800879fc80 ffffea0000361d80 dead000000000005 [ 42.449682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e655c01 [ 42.450591] page dumped because: kasan: bad access detected [ 42.451295] [ 42.451517] Memory state around the buggy address: [ 42.452106] ffff88800ea4e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.452976] ffff88800ea4e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 42.453840] >ffff88800ea4e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.454754] ^ [ 42.455496] ffff88800ea4e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 42.456353] ffff88800ea4e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.457210] ================================================================== [ 42.458539] Disabling lock debugging due to kernel taint [ 44.709822] BUG: Bad rss-counter state mm:00000000e30cd708 type:MM_FILEPAGES val:33 [ 44.711032] BUG: Bad rss-counter state mm:00000000e30cd708 type:MM_ANONPAGES val:22 [ 45.086094] BUG: Bad rss-counter state mm:000000009434c83c type:MM_FILEPAGES val:33 [ 45.087119] BUG: Bad rss-counter state mm:000000009434c83c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19488' (ECDSA) to the list of known hosts. 2023/06/20 04:51:02 fuzzer started 2023/06/20 04:51:02 dialing manager at localhost:44161 2023/06/20 04:51:02 checking machine... 2023/06/20 04:51:02 checking revisions... [ 45.818961] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:51:02 testing simple program... [ 45.869996] cgroup: Unknown subsys name 'net' [ 45.908554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f718df13ef0 CR3=000000000e5d6000 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=2031303a31353a3430203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a343539323420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a31353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f2f8c00 RCX=0000000000000000 RDX=1ffff11001e5f182 RSI=ffffffff83aaf203 RDI=ffff88800f2f8c10 RBP=0000000000000000 RSP=ffff88801c64f4a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009d8000009d8 R12=ffff88801b44b580 R13=0000000000000000 R14=dffffc0000000000 R15=ffff88800f2f8c00 RIP=ffffffff83aaf21c 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 00007fdaf91e4900 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=00007fdaf979b618 CR3=000000000e4f8000 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=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