syzkaller login: [ 30.190093] BUG: Bad rss-counter state mm:000000009189cad2 type:MM_FILEPAGES val:33 [ 30.191324] BUG: Bad rss-counter state mm:000000009189cad2 type:MM_ANONPAGES val:22 [ 30.231056] ================================================================== [ 30.232099] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.233095] Read of size 8 at addr ffff88800c74cdf0 by task sshd/221 [ 30.233891] [ 30.234117] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.234996] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.236015] Call Trace: [ 30.236334] [ 30.236634] dump_stack_lvl+0x91/0xf0 [ 30.237152] print_report+0xcc/0x620 [ 30.237674] ? __virt_addr_valid+0x102/0x340 [ 30.238256] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239537] kasan_report+0xbe/0xf0 [ 30.240027] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.240656] vma_interval_tree_remove+0xc75/0xec0 [ 30.241285] vma_prepare+0xc54/0x11a0 [ 30.241782] __split_vma+0x5af/0x950 [ 30.242271] ? __pfx___split_vma+0x10/0x10 [ 30.242806] ? find_held_lock+0x2c/0x110 [ 30.243337] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.243916] ? lock_is_held_type+0x9f/0x120 [ 30.244476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.245095] ? mtree_range_walk+0x632/0x900 [ 30.245666] ? mas_walk+0x5c7/0x7c0 [ 30.246149] do_vmi_munmap+0x1f1/0x2b0 [ 30.246654] mmap_region+0x1f9/0x2660 [ 30.247145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.247670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.248392] ? __pfx_lock_acquire+0x10/0x10 [ 30.248930] ? __pfx_mmap_region+0x10/0x10 [ 30.249495] ? security_mmap_addr+0x7d/0xa0 [ 30.250043] ? get_unmapped_area+0x1f5/0x3f0 [ 30.250614] do_mmap+0x854/0xf00 [ 30.251072] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.251585] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.252168] ksys_mmap_pgoff+0x3af/0x500 [ 30.252692] do_syscall_64+0x3f/0x90 [ 30.253181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.253851] RIP: 0033:0x7fbad28f0d82 [ 30.254325] 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 [ 30.256507] RSP: 002b:00007ffd6ff80be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.257600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbad28f0d82 [ 30.258471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbad1d2a000 [ 30.259361] RBP: 00007fbad1d2a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.260219] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642e984fec0 [ 30.261092] R13: 00007ffd6ff80c00 R14: 00007ffd6ff80c30 R15: 00007ffd6ff80f90 [ 30.261976] [ 30.262279] [ 30.262497] Allocated by task 214: [ 30.262941] kasan_save_stack+0x22/0x50 [ 30.263451] kasan_set_track+0x25/0x30 [ 30.263951] __kasan_slab_alloc+0x59/0x70 [ 30.264484] kmem_cache_alloc+0x16b/0x370 [ 30.265018] vm_area_dup+0x20/0x160 [ 30.265495] __split_vma+0x170/0x950 [ 30.265976] split_vma+0xc6/0x110 [ 30.266426] mprotect_fixup+0x8d2/0xb30 [ 30.266938] do_mprotect_pkey+0x87e/0xd40 [ 30.267470] __x64_sys_mprotect+0x78/0xc0 [ 30.268009] do_syscall_64+0x3f/0x90 [ 30.268495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.269152] [ 30.269395] Freed by task 214: [ 30.269793] kasan_save_stack+0x22/0x50 [ 30.270308] kasan_set_track+0x25/0x30 [ 30.270815] kasan_save_free_info+0x2b/0x50 [ 30.271356] __kasan_slab_free+0x10a/0x190 [ 30.271899] kmem_cache_free+0x10d/0x4d0 [ 30.272422] rcu_core+0x8c8/0x2860 [ 30.272881] __do_softirq+0x1b7/0x7d4 [ 30.273387] [ 30.273607] Last potentially related work creation: [ 30.274208] kasan_save_stack+0x22/0x50 [ 30.274730] __kasan_record_aux_stack+0x8e/0xa0 [ 30.275316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.275972] remove_vma+0x139/0x170 [ 30.276430] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.277000] do_vmi_munmap+0x1f1/0x2b0 [ 30.277512] __vm_munmap+0x138/0x3a0 [ 30.277993] __x64_sys_munmap+0x59/0x80 [ 30.278494] do_syscall_64+0x3f/0x90 [ 30.278975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279624] [ 30.279844] The buggy address belongs to the object at ffff88800c74cd98 [ 30.279844] which belongs to the cache vm_area_struct of size 168 [ 30.281357] The buggy address is located 88 bytes inside of [ 30.281357] freed 168-byte region [ffff88800c74cd98, ffff88800c74ce40) [ 30.282796] [ 30.283019] The buggy address belongs to the physical page: [ 30.283698] page:00000000177fd609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc74c [ 30.284802] memcg:ffff88800e216501 [ 30.285238] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.285911] page_type: 0xffffffff() [ 30.286379] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.287338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e216501 [ 30.288271] page dumped because: kasan: bad access detected [ 30.288949] [ 30.289172] Memory state around the buggy address: [ 30.289785] ffff88800c74cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.290674] ffff88800c74cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.291569] >ffff88800c74cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.292465] ^ [ 30.293321] ffff88800c74ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.294206] ffff88800c74ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.295091] ================================================================== [ 30.296357] Disabling lock debugging due to kernel taint [ 32.139516] BUG: Bad rss-counter state mm:00000000d13211d4 type:MM_FILEPAGES val:33 [ 32.140528] BUG: Bad rss-counter state mm:00000000d13211d4 type:MM_ANONPAGES val:22 [ 32.705304] BUG: Bad rss-counter state mm:000000008f88ce5a type:MM_FILEPAGES val:33 [ 32.706518] BUG: Bad rss-counter state mm:000000008f88ce5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36341' (ECDSA) to the list of known hosts. 2023/06/20 15:15:39 fuzzer started 2023/06/20 15:15:40 dialing manager at localhost:36067 2023/06/20 15:15:40 checking machine... 2023/06/20 15:15:40 checking revisions... [ 33.363841] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:15:40 testing simple program... [ 33.416695] cgroup: Unknown subsys name 'net' [ 33.469665] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:39 Registers: info registers vcpu 0 RAX=000000000000792d RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=000000000000000a RSI=ffffffff860a1416 RDI=ffffffff85d98e78 RBP=ffff88806ce09af0 RSP=ffff88806ce09a18 R8 =ffffffff860a1416 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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 00007fdc439fe900 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=00007f580ff0a650 CR3=000000000eb2c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=59dd47be851536cb00000000000ae988 XMM05=b8a68c5fc2e522b20000000000132e20 XMM06=68b355f8cf6c93fc0000000000131bc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801646fb08 RSP=ffff88801646f9f0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801646fb10 R13=ffff88801646faf8 R14=ffff88801646fab0 R15=ffff88801646fab0 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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 00007f580f955900 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=00007f580ff0d0b0 CR3=000000000ee44000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000