syzkaller login: [ 32.105693] BUG: Bad rss-counter state mm:000000000d911bfb type:MM_FILEPAGES val:33 [ 32.106917] BUG: Bad rss-counter state mm:000000000d911bfb type:MM_ANONPAGES val:22 [ 32.147976] ================================================================== [ 32.149004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.150040] Read of size 8 at addr ffff88800ea56140 by task sshd/221 [ 32.150890] [ 32.151139] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.152174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.153332] Call Trace: [ 32.153689] [ 32.154027] dump_stack_lvl+0x91/0xf0 [ 32.154684] print_report+0xcc/0x620 [ 32.155240] ? __virt_addr_valid+0x102/0x340 [ 32.155921] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156702] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157521] kasan_report+0xbe/0xf0 [ 32.158145] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.158946] vma_interval_tree_remove+0xc75/0xec0 [ 32.159666] vma_prepare+0xc54/0x11a0 [ 32.160249] __split_vma+0x5af/0x950 [ 32.160816] ? __pfx___split_vma+0x10/0x10 [ 32.161474] ? find_held_lock+0x2c/0x110 [ 32.162092] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.162701] ? lock_is_held_type+0x9f/0x120 [ 32.163318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.164052] ? mtree_range_walk+0x632/0x900 [ 32.164729] ? mas_walk+0x5c7/0x7c0 [ 32.165242] do_vmi_munmap+0x1f1/0x2b0 [ 32.165777] mmap_region+0x1f9/0x2660 [ 32.166352] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.167032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.167924] ? __pfx_lock_acquire+0x10/0x10 [ 32.168521] ? __pfx_mmap_region+0x10/0x10 [ 32.169124] ? security_mmap_addr+0x7d/0xa0 [ 32.169754] ? get_unmapped_area+0x1f5/0x3f0 [ 32.170356] do_mmap+0x854/0xf00 [ 32.170836] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.171402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.172169] ksys_mmap_pgoff+0x3af/0x500 [ 32.172787] do_syscall_64+0x3f/0x90 [ 32.173390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.174140] RIP: 0033:0x7f8dff7e3d82 [ 32.174651] 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 [ 32.177166] RSP: 002b:00007ffffef75d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.178166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8dff7e3d82 [ 32.179090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8dfec1d000 [ 32.180019] RBP: 00007f8dfec1d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.180951] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c66dbc7f70 [ 32.181879] R13: 00007ffffef75d60 R14: 00007ffffef75d90 R15: 00007ffffef760f0 [ 32.182866] [ 32.183193] [ 32.183427] Allocated by task 214: [ 32.183898] kasan_save_stack+0x22/0x50 [ 32.184460] kasan_set_track+0x25/0x30 [ 32.184996] __kasan_slab_alloc+0x59/0x70 [ 32.185560] kmem_cache_alloc+0x16b/0x370 [ 32.186120] vm_area_dup+0x20/0x160 [ 32.186622] __split_vma+0x170/0x950 [ 32.187144] split_vma+0xc6/0x110 [ 32.187626] mprotect_fixup+0x8d2/0xb30 [ 32.188182] do_mprotect_pkey+0x87e/0xd40 [ 32.188749] __x64_sys_mprotect+0x78/0xc0 [ 32.189322] do_syscall_64+0x3f/0x90 [ 32.189843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.190556] [ 32.190797] Freed by task 214: [ 32.191231] kasan_save_stack+0x22/0x50 [ 32.191792] kasan_set_track+0x25/0x30 [ 32.192359] kasan_save_free_info+0x2b/0x50 [ 32.192948] __kasan_slab_free+0x10a/0x190 [ 32.193538] kmem_cache_free+0x10d/0x4d0 [ 32.194120] rcu_core+0x8c8/0x2860 [ 32.194616] __do_softirq+0x1b7/0x7d4 [ 32.195157] [ 32.195395] Last potentially related work creation: [ 32.196045] kasan_save_stack+0x22/0x50 [ 32.196612] __kasan_record_aux_stack+0x8e/0xa0 [ 32.197249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.197956] remove_vma+0x139/0x170 [ 32.198457] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.199071] do_vmi_munmap+0x1f1/0x2b0 [ 32.199604] __vm_munmap+0x138/0x3a0 [ 32.200131] __x64_sys_munmap+0x59/0x80 [ 32.200693] do_syscall_64+0x3f/0x90 [ 32.201216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.201923] [ 32.202153] The buggy address belongs to the object at ffff88800ea560e8 [ 32.202153] which belongs to the cache vm_area_struct of size 168 [ 32.203720] The buggy address is located 88 bytes inside of [ 32.203720] freed 168-byte region [ffff88800ea560e8, ffff88800ea56190) [ 32.205229] [ 32.205459] The buggy address belongs to the physical page: [ 32.206174] page:00000000ab1ad9ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea56 [ 32.207365] memcg:ffff88800ea3a801 [ 32.207835] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.208554] page_type: 0xffffffff() [ 32.209053] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.210058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea3a801 [ 32.211058] page dumped because: kasan: bad access detected [ 32.211785] [ 32.212022] Memory state around the buggy address: [ 32.212666] ffff88800ea56000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.213608] ffff88800ea56080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.214550] >ffff88800ea56100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.215486] ^ [ 32.216209] ffff88800ea56180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.217146] ffff88800ea56200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.218077] ================================================================== [ 32.219213] Disabling lock debugging due to kernel taint [ 34.470489] BUG: Bad rss-counter state mm:0000000067547648 type:MM_FILEPAGES val:33 [ 34.471256] BUG: Bad rss-counter state mm:0000000067547648 type:MM_ANONPAGES val:22 [ 35.006634] BUG: Bad rss-counter state mm:0000000073b611d7 type:MM_FILEPAGES val:33 [ 35.007767] BUG: Bad rss-counter state mm:0000000073b611d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37007' (ECDSA) to the list of known hosts. 2023/06/19 21:36:45 fuzzer started 2023/06/19 21:36:45 dialing manager at localhost:44161 2023/06/19 21:36:45 checking machine... 2023/06/19 21:36:45 checking revisions... [ 35.595408] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:36:45 testing simple program... [ 35.639702] cgroup: Unknown subsys name 'net' [ 35.670140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:44 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=00007fc0e98d67f0 CR3=000000000ee26000 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=4c67d747153fa8b9344e1b9144d9e9f3 XMM02=ec2efd57dc4c00df000000000011bf88 XMM03=8adc7f135d04d06d000000000011c058 XMM04=8cf3dcd33b99385500000000000ae988 XMM05=e4cb8bb95a7664b600000000001337d8 XMM06=91a39b06e5b4113f0000000000132640 XMM07=e042d86d42eb936e0000000000123ec0 XMM08=8adc7f135d04d06d000000000011c058 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fd0db8aa0b0 CR3=0000000008f76000 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=2034343a36333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36333a3132203931 XMM08=00007f6f1c00ae400000007700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000