syzkaller login: [ 30.658997] BUG: Bad rss-counter state mm:000000006243ad65 type:MM_FILEPAGES val:33 [ 30.659906] BUG: Bad rss-counter state mm:000000006243ad65 type:MM_ANONPAGES val:22 [ 30.820843] ================================================================== [ 30.821924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.823031] Read of size 8 at addr ffff8880146d8a50 by task sshd/220 [ 30.824142] [ 30.824401] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.825295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.826235] Call Trace: [ 30.826536] [ 30.826806] dump_stack_lvl+0x91/0xf0 [ 30.827274] print_report+0xcc/0x620 [ 30.827733] ? __virt_addr_valid+0x102/0x340 [ 30.828277] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829437] kasan_report+0xbe/0xf0 [ 30.829889] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830478] vma_interval_tree_remove+0xc75/0xec0 [ 30.831062] vma_prepare+0xc54/0x11a0 [ 30.831538] __split_vma+0x5af/0x950 [ 30.832013] ? __pfx___split_vma+0x10/0x10 [ 30.832537] ? find_held_lock+0x2c/0x110 [ 30.833057] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.833609] ? lock_is_held_type+0x9f/0x120 [ 30.834144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.834742] ? mtree_range_walk+0x632/0x900 [ 30.835289] ? mas_walk+0x5c7/0x7c0 [ 30.835761] do_vmi_munmap+0x1f1/0x2b0 [ 30.836267] mmap_region+0x1f9/0x2660 [ 30.836747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.837257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.837959] ? __pfx_lock_acquire+0x10/0x10 [ 30.838485] ? __pfx_mmap_region+0x10/0x10 [ 30.839016] ? security_mmap_addr+0x7d/0xa0 [ 30.839539] ? get_unmapped_area+0x1f5/0x3f0 [ 30.840095] do_mmap+0x854/0xf00 [ 30.840530] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.841023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.841591] ksys_mmap_pgoff+0x3af/0x500 [ 30.842104] do_syscall_64+0x3f/0x90 [ 30.842571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843212] RIP: 0033:0x7f9bbca11d82 [ 30.843667] 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 [ 30.845782] RSP: 002b:00007ffc23b054e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.846683] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9bbca11d82 [ 30.847539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9bbbe4b000 [ 30.848391] RBP: 00007f9bbbe4b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.849232] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5e9ae4b20 [ 30.850070] R13: 00007ffc23b05500 R14: 00007ffc23b05530 R15: 00007ffc23b05890 [ 30.850920] [ 30.851206] [ 30.851418] Allocated by task 213: [ 30.851835] kasan_save_stack+0x22/0x50 [ 30.852345] kasan_set_track+0x25/0x30 [ 30.852836] __kasan_slab_alloc+0x59/0x70 [ 30.853357] kmem_cache_alloc+0x16b/0x370 [ 30.853869] vm_area_dup+0x20/0x160 [ 30.854330] __split_vma+0x170/0x950 [ 30.854789] split_vma+0xc6/0x110 [ 30.855219] mprotect_fixup+0x8d2/0xb30 [ 30.855706] do_mprotect_pkey+0x87e/0xd40 [ 30.856246] __x64_sys_mprotect+0x78/0xc0 [ 30.856765] do_syscall_64+0x3f/0x90 [ 30.857232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857866] [ 30.858087] Freed by task 213: [ 30.858474] kasan_save_stack+0x22/0x50 [ 30.858968] kasan_set_track+0x25/0x30 [ 30.859455] kasan_save_free_info+0x2b/0x50 [ 30.859986] __kasan_slab_free+0x10a/0x190 [ 30.860526] kmem_cache_free+0x10d/0x4d0 [ 30.861029] rcu_core+0x8c8/0x2860 [ 30.861473] __do_softirq+0x1b7/0x7d4 [ 30.861943] [ 30.862159] Last potentially related work creation: [ 30.862734] kasan_save_stack+0x22/0x50 [ 30.863228] __kasan_record_aux_stack+0x8e/0xa0 [ 30.863807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.864435] remove_vma+0x139/0x170 [ 30.864859] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.865476] do_vmi_munmap+0x1f1/0x2b0 [ 30.865935] __vm_munmap+0x138/0x3a0 [ 30.866375] __x64_sys_munmap+0x59/0x80 [ 30.866846] do_syscall_64+0x3f/0x90 [ 30.867295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867898] [ 30.868109] The buggy address belongs to the object at ffff8880146d89f8 [ 30.868109] which belongs to the cache vm_area_struct of size 168 [ 30.869484] The buggy address is located 88 bytes inside of [ 30.869484] freed 168-byte region [ffff8880146d89f8, ffff8880146d8aa0) [ 30.870798] [ 30.871004] The buggy address belongs to the physical page: [ 30.871626] page:00000000a2e38275 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146d8 [ 30.872663] memcg:ffff8880198a8401 [ 30.873077] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.873716] page_type: 0xffffffff() [ 30.874165] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.875079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198a8401 [ 30.876003] page dumped because: kasan: bad access detected [ 30.876658] [ 30.876872] Memory state around the buggy address: [ 30.877454] ffff8880146d8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.878308] ffff8880146d8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.879153] >ffff8880146d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.880019] ^ [ 30.880725] ffff8880146d8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.881575] ffff8880146d8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.882439] ================================================================== [ 30.883549] Disabling lock debugging due to kernel taint [ 32.787464] BUG: Bad rss-counter state mm:000000003982c230 type:MM_FILEPAGES val:33 [ 32.788518] BUG: Bad rss-counter state mm:000000003982c230 type:MM_ANONPAGES val:22 [ 33.336736] BUG: Bad rss-counter state mm:000000001678f3dd type:MM_FILEPAGES val:33 [ 33.337952] BUG: Bad rss-counter state mm:000000001678f3dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51725' (ECDSA) to the list of known hosts. 2023/06/21 04:50:46 fuzzer started 2023/06/21 04:50:46 dialing manager at localhost:36067 2023/06/21 04:50:46 checking machine... 2023/06/21 04:50:46 checking revisions... [ 34.037476] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:50:46 testing simple program... [ 34.080957] cgroup: Unknown subsys name 'net' [ 34.118817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005578095150c0 RCX=0000000000000022 RDX=0000000000000000 RSI=00007fba48800b22 RDI=00005578095150c0 RBP=000000000000001a RSP=00007ffddfcd5ff8 R8 =00005578095191fa R9 =00007fba48dd7be0 R10=000000000000006f R11=0000000000000246 R12=000055780950ad00 R13=00007ffddfcd6008 R14=00007fba48800b22 R15=00007fba48825710 RIP=00007fba48d76ae4 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fba48825900 00000000 00000000 GS =0000 0000000000000000 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=00007fba48dda650 CR3=000000000e170000 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=00000000000000ff0000000000000000 XMM01=00000000000000010000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=20202020202020205249445f4c49414d XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000000000000000ffffffffffffffff XMM08=00000000000000002020200020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000035000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813710d2 RSP=ffff8880158af868 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea000023b900 R14=ffffffff8367562f R15=ffff888013eb1080 RIP=ffffffff8135b943 RFL=00000083 [--S---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 00007f417107e700 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=00007ffe7721bc68 CR3=000000001664a000 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=3a5d3932325b646873732035343a3035 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323335 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000