syzkaller login: [ 31.970621] BUG: Bad rss-counter state mm:0000000090af6fd5 type:MM_FILEPAGES val:33 [ 31.972298] BUG: Bad rss-counter state mm:0000000090af6fd5 type:MM_ANONPAGES val:22 [ 32.133357] ================================================================== [ 32.134300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.135250] Read of size 8 at addr ffff8880182fe4e0 by task sshd/220 [ 32.136029] [ 32.136260] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.137203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.138186] Call Trace: [ 32.138508] [ 32.138802] dump_stack_lvl+0x91/0xf0 [ 32.139302] print_report+0xcc/0x620 [ 32.139793] ? __virt_addr_valid+0x102/0x340 [ 32.140379] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.141006] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.141636] kasan_report+0xbe/0xf0 [ 32.142123] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.142751] vma_interval_tree_remove+0xc75/0xec0 [ 32.143360] vma_prepare+0xc54/0x11a0 [ 32.143848] __split_vma+0x5af/0x950 [ 32.144329] ? __pfx___split_vma+0x10/0x10 [ 32.144868] ? find_held_lock+0x2c/0x110 [ 32.145400] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.145970] ? lock_is_held_type+0x9f/0x120 [ 32.146513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.147124] ? mtree_range_walk+0x632/0x900 [ 32.147685] ? mas_walk+0x5c7/0x7c0 [ 32.148172] do_vmi_munmap+0x1f1/0x2b0 [ 32.148677] mmap_region+0x1f9/0x2660 [ 32.149173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.149695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.150422] ? __pfx_lock_acquire+0x10/0x10 [ 32.150966] ? __pfx_mmap_region+0x10/0x10 [ 32.151500] ? security_mmap_addr+0x7d/0xa0 [ 32.152045] ? get_unmapped_area+0x1f5/0x3f0 [ 32.152621] do_mmap+0x854/0xf00 [ 32.153073] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.153569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.154137] ksys_mmap_pgoff+0x3af/0x500 [ 32.154661] do_syscall_64+0x3f/0x90 [ 32.155151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.155803] RIP: 0033:0x7fbc1f5e7d82 [ 32.156272] 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 [ 32.158434] RSP: 002b:00007ffde9a6df98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.159354] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc1f5e7d82 [ 32.160232] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc1ea21000 [ 32.161094] RBP: 00007fbc1ea21000 R08: 0000000000000009 R09: 0000000000001000 [ 32.161956] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd18f4cec0 [ 32.162819] R13: 00007ffde9a6dfb0 R14: 00007ffde9a6dfe0 R15: 00007ffde9a6e340 [ 32.163688] [ 32.163992] [ 32.164229] Allocated by task 213: [ 32.164664] kasan_save_stack+0x22/0x50 [ 32.165179] kasan_set_track+0x25/0x30 [ 32.165678] __kasan_slab_alloc+0x59/0x70 [ 32.166215] kmem_cache_alloc+0x16b/0x370 [ 32.166758] vm_area_dup+0x20/0x160 [ 32.167218] __split_vma+0x170/0x950 [ 32.167694] split_vma+0xc6/0x110 [ 32.168140] mprotect_fixup+0x8d2/0xb30 [ 32.168648] do_mprotect_pkey+0x87e/0xd40 [ 32.169170] __x64_sys_mprotect+0x78/0xc0 [ 32.169695] do_syscall_64+0x3f/0x90 [ 32.170173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.170823] [ 32.171045] Freed by task 213: [ 32.171450] kasan_save_stack+0x22/0x50 [ 32.171955] kasan_set_track+0x25/0x30 [ 32.172475] kasan_save_free_info+0x2b/0x50 [ 32.173015] __kasan_slab_free+0x10a/0x190 [ 32.173550] kmem_cache_free+0x10d/0x4d0 [ 32.174068] rcu_core+0x8c8/0x2860 [ 32.174518] __do_softirq+0x1b7/0x7d4 [ 32.175003] [ 32.175238] Last potentially related work creation: [ 32.175853] kasan_save_stack+0x22/0x50 [ 32.176389] __kasan_record_aux_stack+0x8e/0xa0 [ 32.176996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.177671] remove_vma+0x139/0x170 [ 32.178138] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.178718] do_vmi_munmap+0x1f1/0x2b0 [ 32.179227] __vm_munmap+0x138/0x3a0 [ 32.179716] __x64_sys_munmap+0x59/0x80 [ 32.180257] do_syscall_64+0x3f/0x90 [ 32.180747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.181411] [ 32.181636] Second to last potentially related work creation: [ 32.182343] kasan_save_stack+0x22/0x50 [ 32.182863] __kasan_record_aux_stack+0x8e/0xa0 [ 32.183442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.184088] remove_vma+0x139/0x170 [ 32.184557] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.185147] do_vmi_munmap+0x1f1/0x2b0 [ 32.185663] mmap_region+0x1f9/0x2660 [ 32.186158] do_mmap+0x854/0xf00 [ 32.186602] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.187116] ksys_mmap_pgoff+0x7d/0x500 [ 32.187627] do_syscall_64+0x3f/0x90 [ 32.188139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.188817] [ 32.189032] The buggy address belongs to the object at ffff8880182fe488 [ 32.189032] which belongs to the cache vm_area_struct of size 168 [ 32.190554] The buggy address is located 88 bytes inside of [ 32.190554] freed 168-byte region [ffff8880182fe488, ffff8880182fe530) [ 32.192051] [ 32.192291] The buggy address belongs to the physical page: [ 32.192980] page:000000002478c5cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182fe [ 32.194089] memcg:ffff88801665b601 [ 32.194532] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.195198] page_type: 0xffffffff() [ 32.195656] raw: 0100000000000200 ffff8880087a0c80 ffffea0000680d40 dead000000000006 [ 32.196600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801665b601 [ 32.197533] page dumped because: kasan: bad access detected [ 32.198209] [ 32.198431] Memory state around the buggy address: [ 32.199029] ffff8880182fe380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.199914] ffff8880182fe400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.200800] >ffff8880182fe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.201664] ^ [ 32.202422] ffff8880182fe500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.203277] ffff8880182fe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.204137] ================================================================== [ 32.205119] Disabling lock debugging due to kernel taint [ 34.461005] BUG: Bad rss-counter state mm:00000000c1c8d7cd type:MM_FILEPAGES val:33 [ 34.462373] BUG: Bad rss-counter state mm:00000000c1c8d7cd type:MM_ANONPAGES val:22 [ 34.919909] BUG: Bad rss-counter state mm:000000008a26c86b type:MM_FILEPAGES val:33 [ 34.921105] BUG: Bad rss-counter state mm:000000008a26c86b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51418' (ECDSA) to the list of known hosts. 2023/06/21 04:47:02 fuzzer started 2023/06/21 04:47:03 dialing manager at localhost:36067 2023/06/21 04:47:03 checking machine... 2023/06/21 04:47:03 checking revisions... [ 35.667730] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:47:03 testing simple program... [ 35.720117] cgroup: Unknown subsys name 'net' [ 35.775228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888010397c48 RSP=ffff888010397b18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff87f97640 R13=00000000000000e6 R14=ffff888008fe8000 R15=ffff88800fd5e000 RIP=ffffffff814c0404 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 00007fbb0333a900 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=00007fbb038f1618 CR3=000000000ea00000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f431adc8000 CR3=0000000019a34000 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=2032303a37343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000