syzkaller login: [ 31.780359] BUG: Bad rss-counter state mm:00000000c5b23991 type:MM_FILEPAGES val:33 [ 31.781564] BUG: Bad rss-counter state mm:00000000c5b23991 type:MM_ANONPAGES val:22 [ 31.824024] ================================================================== [ 31.825096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.826325] Read of size 8 at addr ffff88800daf26b0 by task sshd/219 [ 31.827110] [ 31.827330] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.828227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.829219] Call Trace: [ 31.829549] [ 31.829838] dump_stack_lvl+0x91/0xf0 [ 31.830351] print_report+0xcc/0x620 [ 31.830847] ? __virt_addr_valid+0x102/0x340 [ 31.831402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.832026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.832653] kasan_report+0xbe/0xf0 [ 31.833128] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.833751] vma_interval_tree_remove+0xc75/0xec0 [ 31.834379] vma_prepare+0xc54/0x11a0 [ 31.834858] __split_vma+0x5af/0x950 [ 31.835330] ? __pfx___split_vma+0x10/0x10 [ 31.835864] ? find_held_lock+0x2c/0x110 [ 31.836382] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.836956] ? lock_is_held_type+0x9f/0x120 [ 31.837494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.838103] ? mtree_range_walk+0x632/0x900 [ 31.838673] ? mas_walk+0x5c7/0x7c0 [ 31.839154] do_vmi_munmap+0x1f1/0x2b0 [ 31.839654] mmap_region+0x1f9/0x2660 [ 31.840138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.840658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.841379] ? __pfx_lock_acquire+0x10/0x10 [ 31.841912] ? __pfx_mmap_region+0x10/0x10 [ 31.842458] ? security_mmap_addr+0x7d/0xa0 [ 31.842989] ? get_unmapped_area+0x1f5/0x3f0 [ 31.843550] do_mmap+0x854/0xf00 [ 31.843990] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.844486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.845053] ksys_mmap_pgoff+0x3af/0x500 [ 31.845570] do_syscall_64+0x3f/0x90 [ 31.846051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.846715] RIP: 0033:0x7f91b5255d82 [ 31.847178] 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 [ 31.849365] RSP: 002b:00007ffce5f99758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.850290] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91b5255d82 [ 31.851134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91b468f000 [ 31.851982] RBP: 00007f91b468f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.852834] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632d5950ec0 [ 31.853678] R13: 00007ffce5f99770 R14: 00007ffce5f997a0 R15: 00007ffce5f99b00 [ 31.854561] [ 31.854857] [ 31.855074] Allocated by task 212: [ 31.855502] kasan_save_stack+0x22/0x50 [ 31.856017] kasan_set_track+0x25/0x30 [ 31.856515] __kasan_slab_alloc+0x59/0x70 [ 31.857041] kmem_cache_alloc+0x16b/0x370 [ 31.857559] vm_area_dup+0x20/0x160 [ 31.858020] __split_vma+0x170/0x950 [ 31.858497] split_vma+0xc6/0x110 [ 31.858948] mprotect_fixup+0x8d2/0xb30 [ 31.859448] do_mprotect_pkey+0x87e/0xd40 [ 31.859978] __x64_sys_mprotect+0x78/0xc0 [ 31.860512] do_syscall_64+0x3f/0x90 [ 31.860992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.861644] [ 31.861865] Freed by task 212: [ 31.862262] kasan_save_stack+0x22/0x50 [ 31.862767] kasan_set_track+0x25/0x30 [ 31.863264] kasan_save_free_info+0x2b/0x50 [ 31.863793] __kasan_slab_free+0x10a/0x190 [ 31.864330] kmem_cache_free+0x10d/0x4d0 [ 31.864844] rcu_core+0x8c8/0x2860 [ 31.865288] __do_softirq+0x1b7/0x7d4 [ 31.865769] [ 31.865983] Last potentially related work creation: [ 31.866579] kasan_save_stack+0x22/0x50 [ 31.867083] __kasan_record_aux_stack+0x8e/0xa0 [ 31.867668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.868308] remove_vma+0x139/0x170 [ 31.868761] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.869321] do_vmi_munmap+0x1f1/0x2b0 [ 31.869808] __vm_munmap+0x138/0x3a0 [ 31.870291] __x64_sys_munmap+0x59/0x80 [ 31.870787] do_syscall_64+0x3f/0x90 [ 31.871264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.871916] [ 31.872139] The buggy address belongs to the object at ffff88800daf2658 [ 31.872139] which belongs to the cache vm_area_struct of size 168 [ 31.873611] The buggy address is located 88 bytes inside of [ 31.873611] freed 168-byte region [ffff88800daf2658, ffff88800daf2700) [ 31.875053] [ 31.875271] The buggy address belongs to the physical page: [ 31.875945] page:000000008fe80b27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaf2 [ 31.877025] memcg:ffff88800e517101 [ 31.877446] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.878095] page_type: 0xffffffff() [ 31.878550] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.879463] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e517101 [ 31.880367] page dumped because: kasan: bad access detected [ 31.881032] [ 31.881248] Memory state around the buggy address: [ 31.881825] ffff88800daf2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.882695] ffff88800daf2600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.883551] >ffff88800daf2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.884417] ^ [ 31.884996] ffff88800daf2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.885851] ffff88800daf2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.886719] ================================================================== [ 31.888102] Disabling lock debugging due to kernel taint [ 34.123267] BUG: Bad rss-counter state mm:000000002600f60e type:MM_FILEPAGES val:33 [ 34.124333] BUG: Bad rss-counter state mm:000000002600f60e type:MM_ANONPAGES val:22 [ 34.624859] BUG: Bad rss-counter state mm:000000000791c883 type:MM_FILEPAGES val:33 [ 34.625878] BUG: Bad rss-counter state mm:000000000791c883 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60900' (ECDSA) to the list of known hosts. 2023/06/21 04:29:52 fuzzer started 2023/06/21 04:29:53 dialing manager at localhost:36067 2023/06/21 04:29:53 checking machine... 2023/06/21 04:29:53 checking revisions... [ 35.339936] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:29:53 testing simple program... [ 35.390437] cgroup: Unknown subsys name 'net' [ 35.449864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:29:52 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=0000000000000001 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=00007ffebb242d98 CR3=0000000005482000 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=00007f1c71e25510000055f9bf5fa790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09bb0 RCX=ffffffff860d8256 RDX=1ffff1100d9e1351 RSI=0000000000000000 RDI=ffff88806cf09a88 RBP=ffff88806cf02000 RSP=ffff88806cf09a08 R8 =ffffffff860d825a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09bb0 R15=ffff88806cf09a78 RIP=ffffffff81131ca6 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 00007f9e95bac700 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=00007fe7d897b000 CR3=000000000d8c4000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032353a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303336 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000