syzkaller login: [ 38.798670] BUG: Bad rss-counter state mm:0000000017675df4 type:MM_FILEPAGES val:33 [ 38.800201] BUG: Bad rss-counter state mm:0000000017675df4 type:MM_ANONPAGES val:22 [ 38.964381] ================================================================== [ 38.965280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.966209] Read of size 8 at addr ffff88800eb406b0 by task sshd/219 [ 38.966974] [ 38.967310] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.968229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.969196] Call Trace: [ 38.969513] [ 38.969796] dump_stack_lvl+0x91/0xf0 [ 38.970296] print_report+0xcc/0x620 [ 38.970779] ? __virt_addr_valid+0x102/0x340 [ 38.971334] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971978] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972595] kasan_report+0xbe/0xf0 [ 38.973074] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973692] vma_interval_tree_remove+0xc75/0xec0 [ 38.974288] vma_prepare+0xc54/0x11a0 [ 38.974763] __split_vma+0x5af/0x950 [ 38.975229] ? __pfx___split_vma+0x10/0x10 [ 38.975761] ? find_held_lock+0x2c/0x110 [ 38.976283] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.976851] ? lock_is_held_type+0x9f/0x120 [ 38.977387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.977993] ? mtree_range_walk+0x632/0x900 [ 38.978541] ? mas_walk+0x5c7/0x7c0 [ 38.979016] do_vmi_munmap+0x1f1/0x2b0 [ 38.979529] mmap_region+0x1f9/0x2660 [ 38.980017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.980538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.981249] ? __pfx_lock_acquire+0x10/0x10 [ 38.981774] ? __pfx_mmap_region+0x10/0x10 [ 38.982304] ? security_mmap_addr+0x7d/0xa0 [ 38.982835] ? get_unmapped_area+0x1f5/0x3f0 [ 38.983385] do_mmap+0x854/0xf00 [ 38.983838] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.984331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.984885] ksys_mmap_pgoff+0x3af/0x500 [ 38.985398] do_syscall_64+0x3f/0x90 [ 38.985874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986524] RIP: 0033:0x7fd1ed369d82 [ 38.986977] 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 [ 38.989087] RSP: 002b:00007ffeac818e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.989990] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1ed369d82 [ 38.990831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1ec7a3000 [ 38.991694] RBP: 00007fd1ec7a3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.992538] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed99153ec0 [ 38.993375] R13: 00007ffeac818e70 R14: 00007ffeac818ea0 R15: 00007ffeac819200 [ 38.994220] [ 38.994511] [ 38.994727] Allocated by task 212: [ 38.995152] kasan_save_stack+0x22/0x50 [ 38.995674] kasan_set_track+0x25/0x30 [ 38.996164] __kasan_slab_alloc+0x59/0x70 [ 38.996707] kmem_cache_alloc+0x16b/0x370 [ 38.997224] vm_area_dup+0x20/0x160 [ 38.997676] __split_vma+0x170/0x950 [ 38.998146] split_vma+0xc6/0x110 [ 38.998585] mprotect_fixup+0x8d2/0xb30 [ 38.999081] do_mprotect_pkey+0x87e/0xd40 [ 38.999614] __x64_sys_mprotect+0x78/0xc0 [ 39.000129] do_syscall_64+0x3f/0x90 [ 39.000603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001260] [ 39.001476] Freed by task 203: [ 39.001863] kasan_save_stack+0x22/0x50 [ 39.002367] kasan_set_track+0x25/0x30 [ 39.002854] kasan_save_free_info+0x2b/0x50 [ 39.003379] __kasan_slab_free+0x10a/0x190 [ 39.003931] kmem_cache_free+0x10d/0x4d0 [ 39.004443] rcu_core+0x8c8/0x2860 [ 39.004889] __do_softirq+0x1b7/0x7d4 [ 39.005374] [ 39.005591] Last potentially related work creation: [ 39.006175] kasan_save_stack+0x22/0x50 [ 39.006675] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007896] remove_vma+0x139/0x170 [ 39.008352] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.009000] do_vmi_munmap+0x1f1/0x2b0 [ 39.009484] __vm_munmap+0x138/0x3a0 [ 39.009949] __x64_sys_munmap+0x59/0x80 [ 39.010443] do_syscall_64+0x3f/0x90 [ 39.010921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011577] [ 39.011792] The buggy address belongs to the object at ffff88800eb40658 [ 39.011792] which belongs to the cache vm_area_struct of size 168 [ 39.013257] The buggy address is located 88 bytes inside of [ 39.013257] freed 168-byte region [ffff88800eb40658, ffff88800eb40700) [ 39.014650] [ 39.014865] The buggy address belongs to the physical page: [ 39.015538] page:000000001c9cb4d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb40 [ 39.016604] memcg:ffff88800e97d701 [ 39.017025] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.017659] page_type: 0xffffffff() [ 39.018106] raw: 0100000000000200 ffff8880087a0c80 ffffea0000358000 dead000000000002 [ 39.019027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e97d701 [ 39.019948] page dumped because: kasan: bad access detected [ 39.020601] [ 39.020818] Memory state around the buggy address: [ 39.021391] ffff88800eb40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.022252] ffff88800eb40600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.023108] >ffff88800eb40680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.023981] ^ [ 39.024560] ffff88800eb40700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.025408] ffff88800eb40780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.026252] ================================================================== [ 39.027155] Disabling lock debugging due to kernel taint [ 41.773560] BUG: Bad rss-counter state mm:00000000ac70d6a2 type:MM_FILEPAGES val:33 [ 41.774546] BUG: Bad rss-counter state mm:00000000ac70d6a2 type:MM_ANONPAGES val:22 [ 42.219318] BUG: Bad rss-counter state mm:00000000319ef19d type:MM_FILEPAGES val:33 [ 42.221012] BUG: Bad rss-counter state mm:00000000319ef19d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12691' (ECDSA) to the list of known hosts. 2023/06/20 23:44:41 fuzzer started 2023/06/20 23:44:41 dialing manager at localhost:36067 2023/06/20 23:44:41 checking machine... 2023/06/20 23:44:41 checking revisions... [ 42.967062] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:44:42 testing simple program... [ 43.013712] cgroup: Unknown subsys name 'net' [ 43.054648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fd952e0 RCX=ffffffff812e0135 RDX=1ffff11002d88b19 RSI=ffffffff87b89f80 RDI=ffff888016c458c8 RBP=ffff888016c45850 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000283 R13=ffff888016c458b8 R14=ffff88801ba1a2c8 R15=ffffffff87b89f80 RIP=ffffffff844d2204 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 00007fd66524c900 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=00007fd665803618 CR3=000000001c9ca000 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=00007f2f9fd14810 CR3=000000000cbbc000 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=46b39466b656babf6f45bf832dc6a15c XMM02=000000000011b778ec2efd57dc4c00df XMM03=00000000001219a0d9ce8872806e3608 XMM04=01225ae67841febc00000000000ae988 XMM05=7905fc9ebfaef6660000000000131a30 XMM06=806171799158d9670000000000131430 XMM07=e042d86d42eb936e0000000000121c20 XMM08=d9ce8872806e3608000000000011b7d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000