syzkaller login: [ 30.976569] BUG: Bad rss-counter state mm:0000000068dddd68 type:MM_FILEPAGES val:33 [ 30.978340] BUG: Bad rss-counter state mm:0000000068dddd68 type:MM_ANONPAGES val:22 [ 31.148594] ================================================================== [ 31.149494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.150440] Read of size 8 at addr ffff88800f625880 by task sshd/228 [ 31.151298] [ 31.151515] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.152384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.153359] Call Trace: [ 31.153687] [ 31.153972] dump_stack_lvl+0x91/0xf0 [ 31.154479] print_report+0xcc/0x620 [ 31.154969] ? __virt_addr_valid+0x102/0x340 [ 31.155524] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156145] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156765] kasan_report+0xbe/0xf0 [ 31.157245] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157875] vma_interval_tree_remove+0xc75/0xec0 [ 31.158508] vma_prepare+0xc54/0x11a0 [ 31.158990] __split_vma+0x5af/0x950 [ 31.159475] ? __pfx___split_vma+0x10/0x10 [ 31.160007] ? find_held_lock+0x2c/0x110 [ 31.160534] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.161110] ? lock_is_held_type+0x9f/0x120 [ 31.161656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.162279] ? mtree_range_walk+0x632/0x900 [ 31.162838] ? mas_walk+0x5c7/0x7c0 [ 31.163321] do_vmi_munmap+0x1f1/0x2b0 [ 31.163815] mmap_region+0x1f9/0x2660 [ 31.164300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.164810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.165527] ? __pfx_lock_acquire+0x10/0x10 [ 31.166063] ? __pfx_mmap_region+0x10/0x10 [ 31.166625] ? security_mmap_addr+0x7d/0xa0 [ 31.167167] ? get_unmapped_area+0x1f5/0x3f0 [ 31.167719] do_mmap+0x854/0xf00 [ 31.168166] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.168664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.169233] ksys_mmap_pgoff+0x3af/0x500 [ 31.169741] do_syscall_64+0x3f/0x90 [ 31.170234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170888] RIP: 0033:0x7f1dded3fd82 [ 31.171348] 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 [ 31.173501] RSP: 002b:00007ffeca257798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.174421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1dded3fd82 [ 31.175280] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1dde179000 [ 31.176139] RBP: 00007f1dde179000 R08: 0000000000000009 R09: 0000000000001000 [ 31.176988] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565090fdaf70 [ 31.177836] R13: 00007ffeca2577b0 R14: 00007ffeca2577e0 R15: 00007ffeca257b40 [ 31.178744] [ 31.179045] [ 31.179267] Allocated by task 221: [ 31.179701] kasan_save_stack+0x22/0x50 [ 31.180209] kasan_set_track+0x25/0x30 [ 31.180709] __kasan_slab_alloc+0x59/0x70 [ 31.181240] kmem_cache_alloc+0x16b/0x370 [ 31.181760] vm_area_dup+0x20/0x160 [ 31.182218] __split_vma+0x170/0x950 [ 31.182687] split_vma+0xc6/0x110 [ 31.183146] mprotect_fixup+0x8d2/0xb30 [ 31.183658] do_mprotect_pkey+0x87e/0xd40 [ 31.184183] __x64_sys_mprotect+0x78/0xc0 [ 31.184716] do_syscall_64+0x3f/0x90 [ 31.185198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185860] [ 31.186076] Freed by task 205: [ 31.186508] kasan_save_stack+0x22/0x50 [ 31.187022] kasan_set_track+0x25/0x30 [ 31.187549] kasan_save_free_info+0x2b/0x50 [ 31.188115] __kasan_slab_free+0x10a/0x190 [ 31.188672] kmem_cache_free+0x10d/0x4d0 [ 31.189214] rcu_core+0x8c8/0x2860 [ 31.189683] __do_softirq+0x1b7/0x7d4 [ 31.190201] [ 31.190430] Last potentially related work creation: [ 31.191053] kasan_save_stack+0x22/0x50 [ 31.191588] __kasan_record_aux_stack+0x8e/0xa0 [ 31.192205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.192881] remove_vma+0x139/0x170 [ 31.193363] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.193953] do_vmi_munmap+0x1f1/0x2b0 [ 31.194468] __vm_munmap+0x138/0x3a0 [ 31.194959] __x64_sys_munmap+0x59/0x80 [ 31.195485] do_syscall_64+0x3f/0x90 [ 31.195984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.196666] [ 31.196891] The buggy address belongs to the object at ffff88800f625828 [ 31.196891] which belongs to the cache vm_area_struct of size 168 [ 31.198470] The buggy address is located 88 bytes inside of [ 31.198470] freed 168-byte region [ffff88800f625828, ffff88800f6258d0) [ 31.199965] [ 31.200191] The buggy address belongs to the physical page: [ 31.200888] page:000000004d8c0cf5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf625 [ 31.202040] memcg:ffff888016c98701 [ 31.202500] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.203192] page_type: 0xffffffff() [ 31.203672] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.204650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c98701 [ 31.205621] page dumped because: kasan: bad access detected [ 31.206329] [ 31.206550] Memory state around the buggy address: [ 31.207164] ffff88800f625780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.208071] ffff88800f625800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.208980] >ffff88800f625880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.209882] ^ [ 31.210329] ffff88800f625900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.211230] ffff88800f625980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.212134] ================================================================== [ 31.213156] Disabling lock debugging due to kernel taint [ 33.583078] BUG: Bad rss-counter state mm:000000008dcc4b2b type:MM_FILEPAGES val:33 [ 33.583830] BUG: Bad rss-counter state mm:000000008dcc4b2b type:MM_ANONPAGES val:22 [ 34.066594] BUG: Bad rss-counter state mm:0000000062fd275d type:MM_FILEPAGES val:33 [ 34.067610] BUG: Bad rss-counter state mm:0000000062fd275d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51344' (ECDSA) to the list of known hosts. 2023/06/20 23:27:03 fuzzer started 2023/06/20 23:27:03 dialing manager at localhost:36067 2023/06/20 23:27:03 checking machine... 2023/06/20 23:27:03 checking revisions... [ 34.625788] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:27:04 testing simple program... [ 34.668556] cgroup: Unknown subsys name 'net' [ 34.724157] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:27:03 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=00000000ffffffff RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8182dc1d RBP=ffff88800f304000 RSP=ffff88806ce09d98 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce361c8 R13=ffffffff87b6a200 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff845118ab RFL=00000046 [---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 00007f9822944900 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=00007f9822efb618 CR3=0000000016e6a000 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=563412feff00545000000000000080fe 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=0000000000000001 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=00007f49099f1f60 CR3=0000000019d4c000 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=2033303a37323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a37323a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000