syzkaller login: [ 39.955107] BUG: Bad rss-counter state mm:000000001bb5dbf2 type:MM_FILEPAGES val:33 [ 39.956188] BUG: Bad rss-counter state mm:000000001bb5dbf2 type:MM_ANONPAGES val:22 [ 40.130021] ================================================================== [ 40.130712] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.131391] Read of size 8 at addr ffff88800d53e798 by task sshd/220 [ 40.131958] [ 40.132145] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.132771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.133487] Call Trace: [ 40.133705] [ 40.133903] dump_stack_lvl+0x91/0xf0 [ 40.134223] print_report+0xcc/0x620 [ 40.134531] ? __virt_addr_valid+0x102/0x340 [ 40.134884] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.135839] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.138637] kasan_report+0xbe/0xf0 [ 40.138945] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.139345] vma_interval_tree_remove+0xc75/0xec0 [ 40.140817] vma_prepare+0xc54/0x11a0 [ 40.141148] __split_vma+0x5af/0x950 [ 40.142596] ? __pfx___split_vma+0x10/0x10 [ 40.143615] ? find_held_lock+0x2c/0x110 [ 40.143983] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.145473] ? lock_is_held_type+0x9f/0x120 [ 40.145844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.146276] ? mtree_range_walk+0x632/0x900 [ 40.147740] ? mas_walk+0x5c7/0x7c0 [ 40.148080] do_vmi_munmap+0x1f1/0x2b0 [ 40.149579] mmap_region+0x1f9/0x2660 [ 40.149941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.150329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.151917] ? __pfx_lock_acquire+0x10/0x10 [ 40.153665] ? __pfx_mmap_region+0x10/0x10 [ 40.154064] ? security_mmap_addr+0x7d/0xa0 [ 40.155523] ? get_unmapped_area+0x1f5/0x3f0 [ 40.155931] do_mmap+0x854/0xf00 [ 40.156321] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.156741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.157184] ksys_mmap_pgoff+0x3af/0x500 [ 40.157645] do_syscall_64+0x3f/0x90 [ 40.157998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.158617] RIP: 0033:0x7fdaf160dd82 [ 40.158958] 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 [ 40.160663] RSP: 002b:00007ffc75d10a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.161341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdaf160dd82 [ 40.162037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdaf0a47000 [ 40.162784] RBP: 00007fdaf0a47000 R08: 0000000000000009 R09: 0000000000001000 [ 40.163508] R10: 0000000000000812 R11: 0000000000000206 R12: 000056131ae6ad90 [ 40.164149] R13: 00007ffc75d10a40 R14: 00007ffc75d10a70 R15: 00007ffc75d10dd0 [ 40.164836] [ 40.165050] [ 40.165216] Allocated by task 211: [ 40.165628] kasan_save_stack+0x22/0x50 [ 40.166006] kasan_set_track+0x25/0x30 [ 40.166496] __kasan_slab_alloc+0x59/0x70 [ 40.166880] kmem_cache_alloc+0x16b/0x370 [ 40.167270] vm_area_dup+0x20/0x160 [ 40.167657] __split_vma+0x170/0x950 [ 40.168005] split_vma+0xc6/0x110 [ 40.168435] mprotect_fixup+0x8d2/0xb30 [ 40.168812] do_mprotect_pkey+0x87e/0xd40 [ 40.169214] __x64_sys_mprotect+0x78/0xc0 [ 40.169675] do_syscall_64+0x3f/0x90 [ 40.170023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.170650] [ 40.170818] Freed by task 13: [ 40.171107] kasan_save_stack+0x22/0x50 [ 40.171535] kasan_set_track+0x25/0x30 [ 40.171909] kasan_save_free_info+0x2b/0x50 [ 40.172318] __kasan_slab_free+0x10a/0x190 [ 40.172758] kmem_cache_free+0x10d/0x4d0 [ 40.173128] rcu_core+0x8c8/0x2860 [ 40.173523] __do_softirq+0x1b7/0x7d4 [ 40.173873] [ 40.174032] Last potentially related work creation: [ 40.174557] kasan_save_stack+0x22/0x50 [ 40.174934] __kasan_record_aux_stack+0x8e/0xa0 [ 40.175421] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.175901] remove_vma+0x139/0x170 [ 40.176254] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.176714] do_vmi_munmap+0x1f1/0x2b0 [ 40.177069] __vm_munmap+0x138/0x3a0 [ 40.177494] __x64_sys_munmap+0x59/0x80 [ 40.177857] do_syscall_64+0x3f/0x90 [ 40.178215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.178779] [ 40.178941] Second to last potentially related work creation: [ 40.179506] kasan_save_stack+0x22/0x50 [ 40.179883] __kasan_record_aux_stack+0x8e/0xa0 [ 40.180327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.180852] remove_vma+0x139/0x170 [ 40.181192] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.181669] do_vmi_munmap+0x1f1/0x2b0 [ 40.182034] __vm_munmap+0x138/0x3a0 [ 40.182506] elf_map+0x26f/0x310 [ 40.182831] load_elf_binary+0x3417/0x5030 [ 40.183232] bprm_execve+0x803/0x1940 [ 40.183639] do_execveat_common+0x734/0x8e0 [ 40.184040] __x64_sys_execve+0x93/0xc0 [ 40.184476] do_syscall_64+0x3f/0x90 [ 40.184822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.185292] [ 40.185528] The buggy address belongs to the object at ffff88800d53e740 [ 40.185528] which belongs to the cache vm_area_struct of size 168 [ 40.186729] The buggy address is located 88 bytes inside of [ 40.186729] freed 168-byte region [ffff88800d53e740, ffff88800d53e7e8) [ 40.187830] [ 40.187996] The buggy address belongs to the physical page: [ 40.188571] page:00000000c92a41a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd53e [ 40.189450] memcg:ffff888009a5ee01 [ 40.189784] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.190289] page_type: 0xffffffff() [ 40.190747] raw: 0100000000000200 ffff88800879fc80 ffffea0000398680 dead000000000003 [ 40.191479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a5ee01 [ 40.192166] page dumped because: kasan: bad access detected [ 40.192701] [ 40.192863] Memory state around the buggy address: [ 40.193293] ffff88800d53e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.193988] ffff88800d53e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.194732] >ffff88800d53e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.195360] ^ [ 40.195784] ffff88800d53e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 40.196562] ffff88800d53e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 40.197182] ================================================================== [ 40.212262] Disabling lock debugging due to kernel taint [ 42.085056] BUG: Bad rss-counter state mm:00000000487ed8d9 type:MM_FILEPAGES val:33 [ 42.087400] BUG: Bad rss-counter state mm:00000000487ed8d9 type:MM_ANONPAGES val:22 [ 42.503589] BUG: Bad rss-counter state mm:0000000046debd59 type:MM_FILEPAGES val:33 [ 42.504268] BUG: Bad rss-counter state mm:0000000046debd59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28275' (ECDSA) to the list of known hosts. 2023/06/20 00:09:17 fuzzer started 2023/06/20 00:09:18 dialing manager at localhost:44161 2023/06/20 00:09:18 checking machine... 2023/06/20 00:09:18 checking revisions... 2023/06/20 00:09:18 testing simple program... [ 43.160665] kmemleak: Automatic memory scanning thread ended [ 43.207218] cgroup: Unknown subsys name 'net' [ 43.241753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:09:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861370ee RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff861370f2 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cdb R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880147af858 R15=ffff88806ce09a98 RIP=ffffffff81130bb0 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 00007f743d750900 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=00007f986bd8b328 CR3=000000000dfb0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85616740 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888008d87cf8 RBP=1ffff110011b0f9b RSP=ffff888008d87cd0 R8 =0000000000000001 R9 =ffffed10011b0f9f R10=0000000000000003 R11=0000000000000000 R12=ffffffff85616748 R13=ffffffff85616750 R14=0000000000000000 R15=ffff888008d71b40 RIP=ffffffff812e00f6 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 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=00007fbc8ec35340 CR3=000000000f778000 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=2037313a39303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000