syzkaller login: [ 67.380133] BUG: Bad rss-counter state mm:000000005980e297 type:MM_FILEPAGES val:33 [ 67.380838] BUG: Bad rss-counter state mm:000000005980e297 type:MM_ANONPAGES val:22 [ 67.410669] ================================================================== [ 67.411422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.412138] Read of size 8 at addr ffff88801a162798 by task sshd/220 [ 67.412809] [ 67.412961] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.413893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.414618] Call Trace: [ 67.414830] [ 67.415018] dump_stack_lvl+0x91/0xf0 [ 67.415499] print_report+0xcc/0x620 [ 67.415909] ? __virt_addr_valid+0x102/0x340 [ 67.416354] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.416754] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.417196] kasan_report+0xbe/0xf0 [ 67.417541] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.417948] vma_interval_tree_remove+0xc75/0xec0 [ 67.418340] vma_prepare+0xc54/0x11a0 [ 67.418650] __split_vma+0x5af/0x950 [ 67.418951] ? __pfx___split_vma+0x10/0x10 [ 67.419297] ? find_held_lock+0x2c/0x110 [ 67.419625] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.419998] ? lock_is_held_type+0x9f/0x120 [ 67.420360] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.420783] ? mtree_range_walk+0x632/0x900 [ 67.421301] ? mas_walk+0x5c7/0x7c0 [ 67.421666] do_vmi_munmap+0x1f1/0x2b0 [ 67.422074] mmap_region+0x1f9/0x2660 [ 67.422475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.422890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.423482] ? __pfx_lock_acquire+0x10/0x10 [ 67.423941] ? __pfx_mmap_region+0x10/0x10 [ 67.424366] ? security_mmap_addr+0x7d/0xa0 [ 67.424794] ? get_unmapped_area+0x1f5/0x3f0 [ 67.425252] do_mmap+0x854/0xf00 [ 67.425577] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.425953] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.426392] ksys_mmap_pgoff+0x3af/0x500 [ 67.426778] do_syscall_64+0x3f/0x90 [ 67.427148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.427690] RIP: 0033:0x7f2646c70d82 [ 67.428054] 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 [ 67.429715] RSP: 002b:00007ffeaaf31178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.430379] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2646c70d82 [ 67.430924] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26460aa000 [ 67.431453] RBP: 00007f26460aa000 R08: 0000000000000009 R09: 0000000000001000 [ 67.431968] R10: 0000000000000812 R11: 0000000000000206 R12: 000056359e104ec0 [ 67.432506] R13: 00007ffeaaf31190 R14: 00007ffeaaf311c0 R15: 00007ffeaaf31520 [ 67.433076] [ 67.433324] [ 67.433462] Allocated by task 213: [ 67.433749] kasan_save_stack+0x22/0x50 [ 67.434083] kasan_set_track+0x25/0x30 [ 67.434401] __kasan_slab_alloc+0x59/0x70 [ 67.434725] kmem_cache_alloc+0x16b/0x370 [ 67.435056] vm_area_dup+0x20/0x160 [ 67.435367] __split_vma+0x170/0x950 [ 67.435671] split_vma+0xc6/0x110 [ 67.435955] mprotect_fixup+0x8d2/0xb30 [ 67.436285] do_mprotect_pkey+0x87e/0xd40 [ 67.436631] __x64_sys_mprotect+0x78/0xc0 [ 67.436959] do_syscall_64+0x3f/0x90 [ 67.437305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.437738] [ 67.437874] Freed by task 213: [ 67.438130] kasan_save_stack+0x22/0x50 [ 67.438463] kasan_set_track+0x25/0x30 [ 67.438777] kasan_save_free_info+0x2b/0x50 [ 67.439115] __kasan_slab_free+0x10a/0x190 [ 67.439472] kmem_cache_free+0x10d/0x4d0 [ 67.439829] rcu_core+0x8c8/0x2860 [ 67.440135] __do_softirq+0x1b7/0x7d4 [ 67.440471] [ 67.440611] Last potentially related work creation: [ 67.440975] kasan_save_stack+0x22/0x50 [ 67.441313] __kasan_record_aux_stack+0x8e/0xa0 [ 67.441685] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.442112] remove_vma+0x139/0x170 [ 67.442416] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.442795] do_vmi_munmap+0x1f1/0x2b0 [ 67.443119] __vm_munmap+0x138/0x3a0 [ 67.443471] __x64_sys_munmap+0x59/0x80 [ 67.443795] do_syscall_64+0x3f/0x90 [ 67.444120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.444583] [ 67.444727] The buggy address belongs to the object at ffff88801a162740 [ 67.444727] which belongs to the cache vm_area_struct of size 168 [ 67.445773] The buggy address is located 88 bytes inside of [ 67.445773] freed 168-byte region [ffff88801a162740, ffff88801a1627e8) [ 67.446786] [ 67.446930] The buggy address belongs to the physical page: [ 67.447382] page:00000000260ef0bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a162 [ 67.448095] memcg:ffff88800cc33f01 [ 67.448390] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.448818] page_type: 0xffffffff() [ 67.449122] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.449778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc33f01 [ 67.450432] page dumped because: kasan: bad access detected [ 67.450871] [ 67.451021] Memory state around the buggy address: [ 67.451456] ffff88801a162680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.452039] ffff88801a162700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 67.452626] >ffff88801a162780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 67.453168] ^ [ 67.453536] ffff88801a162800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 67.454094] ffff88801a162880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 67.454649] ================================================================== [ 67.455382] Disabling lock debugging due to kernel taint [ 68.862258] BUG: Bad rss-counter state mm:0000000084dcdb44 type:MM_FILEPAGES val:33 [ 68.863011] BUG: Bad rss-counter state mm:0000000084dcdb44 type:MM_ANONPAGES val:22 [ 69.216268] BUG: Bad rss-counter state mm:00000000cf3c4e69 type:MM_FILEPAGES val:33 [ 69.216961] BUG: Bad rss-counter state mm:00000000cf3c4e69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6697' (ECDSA) to the list of known hosts. 2023/06/20 08:55:58 fuzzer started 2023/06/20 08:55:59 dialing manager at localhost:44161 2023/06/20 08:55:59 checking machine... 2023/06/20 08:55:59 checking revisions... [ 69.830240] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:55:59 testing simple program... [ 69.862779] cgroup: Unknown subsys name 'net' [ 69.897032] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:55:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f930 RCX=0000000000000001 RDX=1ffff110011aff27 RSI=ffff888008d7fe30 RDI=ffff888008d7f938 RBP=ffff888008d7fe30 RSP=ffff888008d7f888 R8 =0000000000000001 R9 =ffff888008d7f970 R10=0000000000038001 R11=000000000000fdc6 R12=0000000000000008 R13=ffff888008d7f978 R14=ffff888008d7fe30 R15=ffff888008d7f930 RIP=ffffffff81130445 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 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=00007fc26b9b9c10 CR3=000000000f182000 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=35353a3830203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002b48fbf RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888015a47de0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f11bd892900 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=00007f11bdc2e3ec CR3=000000001a242000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000