syzkaller login: [ 39.104572] BUG: Bad rss-counter state mm:000000005d2dcb2b type:MM_FILEPAGES val:33 [ 39.105813] BUG: Bad rss-counter state mm:000000005d2dcb2b type:MM_ANONPAGES val:22 [ 39.263763] ================================================================== [ 39.264736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.265681] Read of size 8 at addr ffff88801a3a6df0 by task sshd/219 [ 39.266462] [ 39.266679] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.267614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.268628] Call Trace: [ 39.268956] [ 39.269241] dump_stack_lvl+0x91/0xf0 [ 39.269756] print_report+0xcc/0x620 [ 39.270245] ? __virt_addr_valid+0x102/0x340 [ 39.270798] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.271417] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.272042] kasan_report+0xbe/0xf0 [ 39.272523] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.273156] vma_interval_tree_remove+0xc75/0xec0 [ 39.273752] vma_prepare+0xc54/0x11a0 [ 39.274235] __split_vma+0x5af/0x950 [ 39.274717] ? __pfx___split_vma+0x10/0x10 [ 39.275244] ? find_held_lock+0x2c/0x110 [ 39.275767] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.276340] ? lock_is_held_type+0x9f/0x120 [ 39.276894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.277508] ? mtree_range_walk+0x632/0x900 [ 39.278064] ? mas_walk+0x5c7/0x7c0 [ 39.278554] do_vmi_munmap+0x1f1/0x2b0 [ 39.279049] mmap_region+0x1f9/0x2660 [ 39.279536] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.280056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.280788] ? __pfx_lock_acquire+0x10/0x10 [ 39.281333] ? __pfx_mmap_region+0x10/0x10 [ 39.281879] ? security_mmap_addr+0x7d/0xa0 [ 39.282429] ? get_unmapped_area+0x1f5/0x3f0 [ 39.282983] do_mmap+0x854/0xf00 [ 39.283428] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.283930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.284512] ksys_mmap_pgoff+0x3af/0x500 [ 39.285030] do_syscall_64+0x3f/0x90 [ 39.285524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.286181] RIP: 0033:0x7f2864427d82 [ 39.286641] 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 [ 39.288812] RSP: 002b:00007ffd72d69238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.289733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2864427d82 [ 39.290606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2863861000 [ 39.291515] RBP: 00007f2863861000 R08: 0000000000000009 R09: 0000000000001000 [ 39.292411] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d99b1eec0 [ 39.293316] R13: 00007ffd72d69250 R14: 00007ffd72d69280 R15: 00007ffd72d695e0 [ 39.294231] [ 39.294537] [ 39.294761] Allocated by task 212: [ 39.295217] kasan_save_stack+0x22/0x50 [ 39.295748] kasan_set_track+0x25/0x30 [ 39.296269] __kasan_slab_alloc+0x59/0x70 [ 39.296848] kmem_cache_alloc+0x16b/0x370 [ 39.297395] vm_area_dup+0x20/0x160 [ 39.297877] __split_vma+0x170/0x950 [ 39.298378] split_vma+0xc6/0x110 [ 39.298842] mprotect_fixup+0x8d2/0xb30 [ 39.299376] do_mprotect_pkey+0x87e/0xd40 [ 39.299937] __x64_sys_mprotect+0x78/0xc0 [ 39.300503] do_syscall_64+0x3f/0x90 [ 39.301007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.301702] [ 39.301930] Freed by task 212: [ 39.302346] kasan_save_stack+0x22/0x50 [ 39.302871] kasan_set_track+0x25/0x30 [ 39.303394] kasan_save_free_info+0x2b/0x50 [ 39.303957] __kasan_slab_free+0x10a/0x190 [ 39.304548] kmem_cache_free+0x10d/0x4d0 [ 39.305088] rcu_core+0x8c8/0x2860 [ 39.305555] __do_softirq+0x1b7/0x7d4 [ 39.306062] [ 39.306291] Last potentially related work creation: [ 39.306915] kasan_save_stack+0x22/0x50 [ 39.307444] __kasan_record_aux_stack+0x8e/0xa0 [ 39.308055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.308752] remove_vma+0x139/0x170 [ 39.309232] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.309831] do_vmi_munmap+0x1f1/0x2b0 [ 39.310343] __vm_munmap+0x138/0x3a0 [ 39.310841] __x64_sys_munmap+0x59/0x80 [ 39.311372] do_syscall_64+0x3f/0x90 [ 39.311884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.312566] [ 39.312793] The buggy address belongs to the object at ffff88801a3a6d98 [ 39.312793] which belongs to the cache vm_area_struct of size 168 [ 39.314356] The buggy address is located 88 bytes inside of [ 39.314356] freed 168-byte region [ffff88801a3a6d98, ffff88801a3a6e40) [ 39.315865] [ 39.316091] The buggy address belongs to the physical page: [ 39.316818] page:000000000dd77355 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3a6 [ 39.317978] memcg:ffff88801a379a01 [ 39.318424] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.319111] page_type: 0xffffffff() [ 39.319588] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.320577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a379a01 [ 39.321542] page dumped because: kasan: bad access detected [ 39.322242] [ 39.322465] Memory state around the buggy address: [ 39.323084] ffff88801a3a6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.323996] ffff88801a3a6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.324928] >ffff88801a3a6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.325824] ^ [ 39.326678] ffff88801a3a6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.327588] ffff88801a3a6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.328495] ================================================================== [ 39.329612] Disabling lock debugging due to kernel taint [ 41.451747] BUG: Bad rss-counter state mm:00000000c4375363 type:MM_FILEPAGES val:33 [ 41.452783] BUG: Bad rss-counter state mm:00000000c4375363 type:MM_ANONPAGES val:22 [ 41.937519] BUG: Bad rss-counter state mm:000000003a30ca44 type:MM_FILEPAGES val:33 [ 41.938701] BUG: Bad rss-counter state mm:000000003a30ca44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64793' (ECDSA) to the list of known hosts. 2023/06/20 21:25:51 fuzzer started 2023/06/20 21:25:52 dialing manager at localhost:36067 2023/06/20 21:25:52 checking machine... 2023/06/20 21:25:52 checking revisions... [ 42.633751] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:25:52 testing simple program... [ 42.674635] cgroup: Unknown subsys name 'net' [ 42.738730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:25:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000c RCX=ffffffff8184ce41 RDX=ffff88800ea23680 RSI=000000000000000c RDI=0000000000000000 RBP=00007ffdcaa461a8 RSP=ffff888018307ac8 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000c R11=00000000000b6a61 R12=ffff888018307bb8 R13=0000000000000001 R14=ffff888018307bb8 R15=00007ffdcaa46184 RIP=ffffffff814c0438 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 00007fe946fd2900 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=00007ffdcaa43000 CR3=000000000d9c6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f2c998caa10 CR3=000000000d790000 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=2031353a35323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000