syzkaller login: [ 35.535434] BUG: Bad rss-counter state mm:00000000877e10a4 type:MM_FILEPAGES val:33 [ 35.537471] BUG: Bad rss-counter state mm:00000000877e10a4 type:MM_ANONPAGES val:22 [ 35.714538] ================================================================== [ 35.715692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.716838] Read of size 8 at addr ffff88800e935058 by task sshd/219 [ 35.717684] [ 35.717919] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.718877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.719972] Call Trace: [ 35.720322] [ 35.720631] dump_stack_lvl+0x91/0xf0 [ 35.721174] print_report+0xcc/0x620 [ 35.721702] ? __virt_addr_valid+0x102/0x340 [ 35.722307] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.723005] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.723684] kasan_report+0xbe/0xf0 [ 35.724212] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.724891] vma_interval_tree_remove+0xc75/0xec0 [ 35.725552] vma_prepare+0xc54/0x11a0 [ 35.726071] __split_vma+0x5af/0x950 [ 35.726594] ? __pfx___split_vma+0x10/0x10 [ 35.727189] ? find_held_lock+0x2c/0x110 [ 35.727763] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.728384] ? lock_is_held_type+0x9f/0x120 [ 35.728978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.729641] ? mtree_range_walk+0x632/0x900 [ 35.730247] ? mas_walk+0x5c7/0x7c0 [ 35.730762] do_vmi_munmap+0x1f1/0x2b0 [ 35.731305] mmap_region+0x1f9/0x2660 [ 35.731833] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.732393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.733170] ? __pfx_lock_acquire+0x10/0x10 [ 35.733746] ? __pfx_mmap_region+0x10/0x10 [ 35.734331] ? security_mmap_addr+0x7d/0xa0 [ 35.734930] ? get_unmapped_area+0x1f5/0x3f0 [ 35.735533] do_mmap+0x854/0xf00 [ 35.736016] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.736558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.737176] ksys_mmap_pgoff+0x3af/0x500 [ 35.737734] do_syscall_64+0x3f/0x90 [ 35.738260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.738976] RIP: 0033:0x7f0cf8218d82 [ 35.739478] 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 [ 35.741813] RSP: 002b:00007fff83b1f638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.742808] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cf8218d82 [ 35.743730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cf7652000 [ 35.744601] RBP: 00007f0cf7652000 R08: 0000000000000009 R09: 0000000000001000 [ 35.745530] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b398a34ec0 [ 35.746453] R13: 00007fff83b1f650 R14: 00007fff83b1f680 R15: 00007fff83b1f9e0 [ 35.747410] [ 35.747733] [ 35.747969] Allocated by task 212: [ 35.748438] kasan_save_stack+0x22/0x50 [ 35.748986] kasan_set_track+0x25/0x30 [ 35.749533] __kasan_slab_alloc+0x59/0x70 [ 35.750108] kmem_cache_alloc+0x16b/0x370 [ 35.750677] vm_area_dup+0x20/0x160 [ 35.751182] __split_vma+0x170/0x950 [ 35.751691] split_vma+0xc6/0x110 [ 35.752172] mprotect_fixup+0x8d2/0xb30 [ 35.752717] do_mprotect_pkey+0x87e/0xd40 [ 35.753287] __x64_sys_mprotect+0x78/0xc0 [ 35.753867] do_syscall_64+0x3f/0x90 [ 35.754394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.755125] [ 35.755360] Freed by task 212: [ 35.755790] kasan_save_stack+0x22/0x50 [ 35.756342] kasan_set_track+0x25/0x30 [ 35.756881] kasan_save_free_info+0x2b/0x50 [ 35.757468] __kasan_slab_free+0x10a/0x190 [ 35.758054] kmem_cache_free+0x10d/0x4d0 [ 35.758608] rcu_core+0x8c8/0x2860 [ 35.759108] __do_softirq+0x1b7/0x7d4 [ 35.759639] [ 35.759876] Last potentially related work creation: [ 35.760520] kasan_save_stack+0x22/0x50 [ 35.761070] __kasan_record_aux_stack+0x8e/0xa0 [ 35.761703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.762416] remove_vma+0x139/0x170 [ 35.762920] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.763534] do_vmi_munmap+0x1f1/0x2b0 [ 35.764071] __vm_munmap+0x138/0x3a0 [ 35.764581] __x64_sys_munmap+0x59/0x80 [ 35.765129] do_syscall_64+0x3f/0x90 [ 35.765650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.766364] [ 35.766596] Second to last potentially related work creation: [ 35.767355] kasan_save_stack+0x22/0x50 [ 35.767903] __kasan_record_aux_stack+0x8e/0xa0 [ 35.768534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.769239] remove_vma+0x139/0x170 [ 35.769736] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.770347] do_vmi_munmap+0x1f1/0x2b0 [ 35.770888] mmap_region+0x1f9/0x2660 [ 35.771411] do_mmap+0x854/0xf00 [ 35.771887] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.772429] ksys_mmap_pgoff+0x3af/0x500 [ 35.772982] do_syscall_64+0x3f/0x90 [ 35.773507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.774221] [ 35.774460] The buggy address belongs to the object at ffff88800e935000 [ 35.774460] which belongs to the cache vm_area_struct of size 168 [ 35.776098] The buggy address is located 88 bytes inside of [ 35.776098] freed 168-byte region [ffff88800e935000, ffff88800e9350a8) [ 35.777653] [ 35.777891] The buggy address belongs to the physical page: [ 35.778616] page:0000000032c658be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe935 [ 35.779829] memcg:ffff88800e38eb01 [ 35.780302] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.781070] page_type: 0xffffffff() [ 35.781567] raw: 0100000000000200 ffff8880087a0c80 ffffea000035c500 dead000000000003 [ 35.782586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e38eb01 [ 35.783588] page dumped because: kasan: bad access detected [ 35.784312] [ 35.784546] Memory state around the buggy address: [ 35.785181] ffff88800e934f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 35.786105] ffff88800e934f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.787045] >ffff88800e935000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.787973] ^ [ 35.788769] ffff88800e935080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.789712] ffff88800e935100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.790639] ================================================================== [ 35.792214] Disabling lock debugging due to kernel taint [ 37.773324] BUG: Bad rss-counter state mm:00000000a5c46013 type:MM_FILEPAGES val:33 [ 37.774517] BUG: Bad rss-counter state mm:00000000a5c46013 type:MM_ANONPAGES val:22 [ 38.292603] BUG: Bad rss-counter state mm:0000000083e3cdb2 type:MM_FILEPAGES val:33 [ 38.293886] BUG: Bad rss-counter state mm:0000000083e3cdb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34916' (ECDSA) to the list of known hosts. 2023/06/20 16:21:12 fuzzer started 2023/06/20 16:21:13 dialing manager at localhost:36067 2023/06/20 16:21:13 checking machine... 2023/06/20 16:21:13 checking revisions... [ 39.044039] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:21:13 testing simple program... [ 39.098949] cgroup: Unknown subsys name 'net' [ 39.142734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fb99f5a7430 CR3=000000000d988000 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=5a97d351964971bc3f465d25e7e5af4c XMM02=000000000011b758eff9b2d0a8fce9cb XMM03=000000000011b8282c67c8bc2e329bc3 XMM04=962f49b24ea899f400000000000ae988 XMM05=dfcdbad4f1609c370000000000133090 XMM06=04b48df0939f7ce30000000000132268 XMM07=e042d86d42eb936e0000000000122460 XMM08=4c15b05cb0209b16000000000011b828 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc17a5 RBX=ffffffff85e0bd2c RCX=ffffffff818d9c05 RDX=0000000000000000 RSI=ffffffff8614da06 RDI=ffffffff85e0bd18 RBP=ffffffff85e0bd18 RSP=ffff88806cf099c0 R8 =ffffffff8614da06 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000244d5 R12=ffffffff85e0bd44 R13=ffffffff85e0bd18 R14=ffffffff85e0bd18 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f21668ea900 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=00007f2166ea1618 CR3=000000000e1c4000 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