syzkaller login: [ 44.774950] BUG: Bad rss-counter state mm:000000005bdd1e52 type:MM_FILEPAGES val:33 [ 44.776163] BUG: Bad rss-counter state mm:000000005bdd1e52 type:MM_ANONPAGES val:22 [ 44.814825] ================================================================== [ 44.815927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.816977] Read of size 8 at addr ffff88801946db38 by task sshd/225 [ 44.817838] [ 44.818080] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.819024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.820088] Call Trace: [ 44.820443] [ 44.820760] dump_stack_lvl+0x91/0xf0 [ 44.821316] print_report+0xcc/0x620 [ 44.821850] ? __virt_addr_valid+0x102/0x340 [ 44.822454] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.823126] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.823801] kasan_report+0xbe/0xf0 [ 44.824337] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.825045] vma_interval_tree_remove+0xc75/0xec0 [ 44.825721] vma_prepare+0xc54/0x11a0 [ 44.826259] __split_vma+0x5af/0x950 [ 44.826790] ? __pfx___split_vma+0x10/0x10 [ 44.827384] ? find_held_lock+0x2c/0x110 [ 44.827961] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.828577] ? lock_is_held_type+0x9f/0x120 [ 44.829195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.829858] ? mtree_range_walk+0x632/0x900 [ 44.830460] ? mas_walk+0x5c7/0x7c0 [ 44.830972] do_vmi_munmap+0x1f1/0x2b0 [ 44.831514] mmap_region+0x1f9/0x2660 [ 44.832043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.832595] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.833377] ? __pfx_lock_acquire+0x10/0x10 [ 44.833957] ? __pfx_mmap_region+0x10/0x10 [ 44.834526] ? security_mmap_addr+0x7d/0xa0 [ 44.835103] ? get_unmapped_area+0x1f5/0x3f0 [ 44.835696] do_mmap+0x854/0xf00 [ 44.836174] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.836706] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.837325] ksys_mmap_pgoff+0x3af/0x500 [ 44.837871] do_syscall_64+0x3f/0x90 [ 44.838396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.839107] RIP: 0033:0x7fdd6e432d82 [ 44.839612] 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 [ 44.841951] RSP: 002b:00007ffd7c82c278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.842932] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd6e432d82 [ 44.843850] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd6d86c000 [ 44.844768] RBP: 00007fdd6d86c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.845707] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565523bffec0 [ 44.846632] R13: 00007ffd7c82c290 R14: 00007ffd7c82c2c0 R15: 00007ffd7c82c620 [ 44.847556] [ 44.847868] [ 44.848100] Allocated by task 218: [ 44.848563] kasan_save_stack+0x22/0x50 [ 44.849120] kasan_set_track+0x25/0x30 [ 44.849652] __kasan_slab_alloc+0x59/0x70 [ 44.850220] kmem_cache_alloc+0x16b/0x370 [ 44.850779] vm_area_dup+0x20/0x160 [ 44.851266] __split_vma+0x170/0x950 [ 44.851775] split_vma+0xc6/0x110 [ 44.852246] mprotect_fixup+0x8d2/0xb30 [ 44.852785] do_mprotect_pkey+0x87e/0xd40 [ 44.853360] __x64_sys_mprotect+0x78/0xc0 [ 44.853925] do_syscall_64+0x3f/0x90 [ 44.854442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.855137] [ 44.855373] Freed by task 218: [ 44.855800] kasan_save_stack+0x22/0x50 [ 44.856339] kasan_set_track+0x25/0x30 [ 44.856892] kasan_save_free_info+0x2b/0x50 [ 44.857469] __kasan_slab_free+0x10a/0x190 [ 44.858046] kmem_cache_free+0x10d/0x4d0 [ 44.858602] rcu_core+0x8c8/0x2860 [ 44.859080] __do_softirq+0x1b7/0x7d4 [ 44.859591] [ 44.859824] Last potentially related work creation: [ 44.860452] kasan_save_stack+0x22/0x50 [ 44.861007] __kasan_record_aux_stack+0x8e/0xa0 [ 44.861629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.862328] remove_vma+0x139/0x170 [ 44.862818] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.863419] do_vmi_munmap+0x1f1/0x2b0 [ 44.863949] __vm_munmap+0x138/0x3a0 [ 44.864460] __x64_sys_munmap+0x59/0x80 [ 44.865017] do_syscall_64+0x3f/0x90 [ 44.865528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.866253] [ 44.866496] The buggy address belongs to the object at ffff88801946dae0 [ 44.866496] which belongs to the cache vm_area_struct of size 168 [ 44.868158] The buggy address is located 88 bytes inside of [ 44.868158] freed 168-byte region [ffff88801946dae0, ffff88801946db88) [ 44.869759] [ 44.870005] The buggy address belongs to the physical page: [ 44.870753] page:00000000110f66e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1946d [ 44.871981] memcg:ffff888016dd2301 [ 44.872468] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.873205] page_type: 0xffffffff() [ 44.873719] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.874765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dd2301 [ 44.875788] page dumped because: kasan: bad access detected [ 44.876539] [ 44.876782] Memory state around the buggy address: [ 44.877460] ffff88801946da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.878430] ffff88801946da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 44.879402] >ffff88801946db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.880370] ^ [ 44.881065] ffff88801946db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.882039] ffff88801946dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.883000] ================================================================== [ 44.884192] Disabling lock debugging due to kernel taint [ 46.319081] BUG: Bad rss-counter state mm:00000000778d0aaa type:MM_FILEPAGES val:33 [ 46.319657] BUG: Bad rss-counter state mm:00000000778d0aaa type:MM_ANONPAGES val:22 [ 46.842979] BUG: Bad rss-counter state mm:000000004d99f443 type:MM_FILEPAGES val:33 [ 46.844220] BUG: Bad rss-counter state mm:000000004d99f443 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6225' (ECDSA) to the list of known hosts. 2023/06/19 11:23:57 fuzzer started 2023/06/19 11:23:58 dialing manager at localhost:44161 2023/06/19 11:23:58 checking machine... 2023/06/19 11:23:58 checking revisions... [ 47.480501] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:58 testing simple program... [ 47.521068] cgroup: Unknown subsys name 'net' [ 47.582558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f892c7459d0 CR3=000000000f11e000 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=33323a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3433325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323134 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=dffffc0000000000 RBX=ffff88800c687610 RCX=ffffffff861361d0 RDX=1ffff110018d0ec2 RSI=ffff88800c687a30 RDI=ffff88800c687610 RBP=ffff88800c687a30 RSP=ffff88800c687568 R8 =ffffffff861361d4 R9 =ffff88800c687650 R10=0000000000038001 R11=0000000000020a4e R12=0000000000000008 R13=ffff88800c687658 R14=ffff88800c687a38 R15=ffff88800c687610 RIP=ffffffff81130416 RFL=00000292 [--S-A--] 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 00007f5da646d900 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=00007ffc3c846000 CR3=00000000101d6000 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