syzkaller login: [ 34.707360] BUG: Bad rss-counter state mm:0000000026c90395 type:MM_FILEPAGES val:33 [ 34.708600] BUG: Bad rss-counter state mm:0000000026c90395 type:MM_ANONPAGES val:22 [ 34.867746] ================================================================== [ 34.868653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.869598] Read of size 8 at addr ffff888009581798 by task sshd/220 [ 34.870372] [ 34.870592] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.871655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.872641] Call Trace: [ 34.872967] [ 34.873355] dump_stack_lvl+0x91/0xf0 [ 34.873947] print_report+0xcc/0x620 [ 34.874531] ? __virt_addr_valid+0x102/0x340 [ 34.875238] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.875993] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.876726] kasan_report+0xbe/0xf0 [ 34.877309] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.878075] vma_interval_tree_remove+0xc75/0xec0 [ 34.878835] vma_prepare+0xc54/0x11a0 [ 34.879427] __split_vma+0x5af/0x950 [ 34.880012] ? __pfx___split_vma+0x10/0x10 [ 34.880665] ? find_held_lock+0x2c/0x110 [ 34.881309] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.881998] ? lock_is_held_type+0x9f/0x120 [ 34.882663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.883426] ? mtree_range_walk+0x632/0x900 [ 34.884107] ? mas_walk+0x5c7/0x7c0 [ 34.884692] do_vmi_munmap+0x1f1/0x2b0 [ 34.885307] mmap_region+0x1f9/0x2660 [ 34.885906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.886529] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.887434] ? __pfx_lock_acquire+0x10/0x10 [ 34.888016] ? __pfx_mmap_region+0x10/0x10 [ 34.888554] ? security_mmap_addr+0x7d/0xa0 [ 34.889089] ? get_unmapped_area+0x1f5/0x3f0 [ 34.889646] do_mmap+0x854/0xf00 [ 34.890085] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.890595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.891172] ksys_mmap_pgoff+0x3af/0x500 [ 34.891678] do_syscall_64+0x3f/0x90 [ 34.892156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.892817] RIP: 0033:0x7f528789ad82 [ 34.893285] 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 [ 34.895453] RSP: 002b:00007ffcd4d36128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.896362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f528789ad82 [ 34.897211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5286cd4000 [ 34.898065] RBP: 00007f5286cd4000 R08: 0000000000000009 R09: 0000000000001000 [ 34.898924] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623f1212f70 [ 34.899771] R13: 00007ffcd4d36140 R14: 00007ffcd4d36170 R15: 00007ffcd4d364d0 [ 34.900634] [ 34.900928] [ 34.901142] Allocated by task 213: [ 34.901585] kasan_save_stack+0x22/0x50 [ 34.902094] kasan_set_track+0x25/0x30 [ 34.902590] __kasan_slab_alloc+0x59/0x70 [ 34.903135] kmem_cache_alloc+0x16b/0x370 [ 34.903663] vm_area_dup+0x20/0x160 [ 34.904131] __split_vma+0x170/0x950 [ 34.904607] split_vma+0xc6/0x110 [ 34.905047] mprotect_fixup+0x8d2/0xb30 [ 34.905557] do_mprotect_pkey+0x87e/0xd40 [ 34.906094] __x64_sys_mprotect+0x78/0xc0 [ 34.906612] do_syscall_64+0x3f/0x90 [ 34.907102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.907755] [ 34.907971] Freed by task 213: [ 34.908369] kasan_save_stack+0x22/0x50 [ 34.908872] kasan_set_track+0x25/0x30 [ 34.909371] kasan_save_free_info+0x2b/0x50 [ 34.909912] __kasan_slab_free+0x10a/0x190 [ 34.910455] kmem_cache_free+0x10d/0x4d0 [ 34.910987] rcu_core+0x8c8/0x2860 [ 34.911436] __do_softirq+0x1b7/0x7d4 [ 34.911990] [ 34.912208] Last potentially related work creation: [ 34.912796] kasan_save_stack+0x22/0x50 [ 34.913301] __kasan_record_aux_stack+0x8e/0xa0 [ 34.913877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.914525] remove_vma+0x139/0x170 [ 34.915004] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.915569] do_vmi_munmap+0x1f1/0x2b0 [ 34.916058] __vm_munmap+0x138/0x3a0 [ 34.916532] __x64_sys_munmap+0x59/0x80 [ 34.917032] do_syscall_64+0x3f/0x90 [ 34.917510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.918164] [ 34.918388] The buggy address belongs to the object at ffff888009581740 [ 34.918388] which belongs to the cache vm_area_struct of size 168 [ 34.919896] The buggy address is located 88 bytes inside of [ 34.919896] freed 168-byte region [ffff888009581740, ffff8880095817e8) [ 34.921327] [ 34.921549] The buggy address belongs to the physical page: [ 34.922222] page:00000000e6d844e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9581 [ 34.923346] memcg:ffff88800e855601 [ 34.923783] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.924432] page_type: 0xffffffff() [ 34.924892] raw: 0100000000000200 ffff88800879fc80 ffffea000025bf00 dead000000000006 [ 34.925839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e855601 [ 34.926760] page dumped because: kasan: bad access detected [ 34.927433] [ 34.927655] Memory state around the buggy address: [ 34.928246] ffff888009581680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.929129] ffff888009581700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.929996] >ffff888009581780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.930870] ^ [ 34.931366] ffff888009581800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.932227] ffff888009581880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.933108] ================================================================== [ 34.934069] Disabling lock debugging due to kernel taint [ 37.326624] BUG: Bad rss-counter state mm:00000000207a2010 type:MM_FILEPAGES val:33 [ 37.327638] BUG: Bad rss-counter state mm:00000000207a2010 type:MM_ANONPAGES val:22 [ 37.896953] BUG: Bad rss-counter state mm:00000000e593db05 type:MM_FILEPAGES val:33 [ 37.898122] BUG: Bad rss-counter state mm:00000000e593db05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16242' (ECDSA) to the list of known hosts. 2023/06/19 17:43:32 fuzzer started 2023/06/19 17:43:32 dialing manager at localhost:44161 2023/06/19 17:43:32 checking machine... 2023/06/19 17:43:32 checking revisions... [ 38.506104] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:43:32 testing simple program... [ 38.550026] cgroup: Unknown subsys name 'net' [ 38.586024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:43:28 Registers: info registers vcpu 0 RAX=ffff888019a63980 RBX=1ffff11003396fc2 RCX=0000000000000000 RDX=ffff888017171b40 RSI=ffffffff83635959 RDI=ffff88800eb03830 RBP=0000000000000001 RSP=ffff888019cb7e10 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800eb03680 R11=0000000000000000 R12=0000000000000000 R13=ffff888019a63980 R14=00007ffcf44fa570 R15=0000000000000000 RIP=ffffffff83644320 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 00007fee2c107900 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=00007fee2c6be618 CR3=000000000f1be000 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=0000000000000001 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=00007efda53bc000 CR3=000000000d7c8000 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=a06a69fb7e1c689ffa43ef5e09805180 XMM02=000000000011d830ec2efd57dc4c00df XMM03=00000000001245a0f3d2577fe271370e XMM04=6aa44ba65e024aa900000000000ae988 XMM05=59d5b690e0af863b0000000000133e60 XMM06=a42e0d466fad28170000000000133038 XMM07=e042d86d42eb936e0000000000124878 XMM08=f3d2577fe271370e000000000011d890 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000