syzkaller login: [ 41.029566] BUG: Bad rss-counter state mm:0000000044839d4d type:MM_FILEPAGES val:33 [ 41.030747] BUG: Bad rss-counter state mm:0000000044839d4d type:MM_ANONPAGES val:22 [ 41.180623] ================================================================== [ 41.181511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.182426] Read of size 8 at addr ffff88800e523ed8 by task sshd/221 [ 41.183187] [ 41.183405] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.184381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.185362] Call Trace: [ 41.185682] [ 41.185967] dump_stack_lvl+0x91/0xf0 [ 41.186456] print_report+0xcc/0x620 [ 41.186966] ? __virt_addr_valid+0x102/0x340 [ 41.187516] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.188120] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.188726] kasan_report+0xbe/0xf0 [ 41.189196] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.189811] vma_interval_tree_remove+0xc75/0xec0 [ 41.190409] vma_prepare+0xc54/0x11a0 [ 41.190912] __split_vma+0x5af/0x950 [ 41.191388] ? __pfx___split_vma+0x10/0x10 [ 41.191908] ? find_held_lock+0x2c/0x110 [ 41.192437] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.193006] ? lock_is_held_type+0x9f/0x120 [ 41.193545] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.194151] ? mtree_range_walk+0x632/0x900 [ 41.194732] ? mas_walk+0x5c7/0x7c0 [ 41.195207] do_vmi_munmap+0x1f1/0x2b0 [ 41.195690] mmap_region+0x1f9/0x2660 [ 41.196173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.196676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.197383] ? __pfx_lock_acquire+0x10/0x10 [ 41.197907] ? __pfx_mmap_region+0x10/0x10 [ 41.198433] ? security_mmap_addr+0x7d/0xa0 [ 41.198967] ? get_unmapped_area+0x1f5/0x3f0 [ 41.199515] do_mmap+0x854/0xf00 [ 41.199948] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.200448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.201001] ksys_mmap_pgoff+0x3af/0x500 [ 41.201504] do_syscall_64+0x3f/0x90 [ 41.201973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.202614] RIP: 0033:0x7fafbddfdd82 [ 41.203063] 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 [ 41.205172] RSP: 002b:00007fffddb51798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.206078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafbddfdd82 [ 41.206941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafbd237000 [ 41.207776] RBP: 00007fafbd237000 R08: 0000000000000009 R09: 0000000000001000 [ 41.208616] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7945acf70 [ 41.209462] R13: 00007fffddb517b0 R14: 00007fffddb517e0 R15: 00007fffddb51b40 [ 41.210322] [ 41.210623] [ 41.210837] Allocated by task 214: [ 41.211265] kasan_save_stack+0x22/0x50 [ 41.211774] kasan_set_track+0x25/0x30 [ 41.212266] __kasan_slab_alloc+0x59/0x70 [ 41.212786] kmem_cache_alloc+0x16b/0x370 [ 41.213297] vm_area_dup+0x20/0x160 [ 41.213747] __split_vma+0x170/0x950 [ 41.214204] split_vma+0xc6/0x110 [ 41.214647] mprotect_fixup+0x8d2/0xb30 [ 41.215145] do_mprotect_pkey+0x87e/0xd40 [ 41.215664] __x64_sys_mprotect+0x78/0xc0 [ 41.216180] do_syscall_64+0x3f/0x90 [ 41.216652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.217292] [ 41.217509] Freed by task 214: [ 41.217895] kasan_save_stack+0x22/0x50 [ 41.218398] kasan_set_track+0x25/0x30 [ 41.218904] kasan_save_free_info+0x2b/0x50 [ 41.219431] __kasan_slab_free+0x10a/0x190 [ 41.219953] kmem_cache_free+0x10d/0x4d0 [ 41.220460] rcu_core+0x8c8/0x2860 [ 41.220899] __do_softirq+0x1b7/0x7d4 [ 41.221366] [ 41.221585] Last potentially related work creation: [ 41.222161] kasan_save_stack+0x22/0x50 [ 41.222666] __kasan_record_aux_stack+0x8e/0xa0 [ 41.223236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.223875] remove_vma+0x139/0x170 [ 41.224322] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.224883] do_vmi_munmap+0x1f1/0x2b0 [ 41.225362] __vm_munmap+0x138/0x3a0 [ 41.225828] __x64_sys_munmap+0x59/0x80 [ 41.226318] do_syscall_64+0x3f/0x90 [ 41.226792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.227426] [ 41.227639] Second to last potentially related work creation: [ 41.228317] kasan_save_stack+0x22/0x50 [ 41.228817] __kasan_record_aux_stack+0x8e/0xa0 [ 41.229384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.230020] remove_vma+0x139/0x170 [ 41.230477] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.231050] do_vmi_munmap+0x1f1/0x2b0 [ 41.231533] mmap_region+0x1f9/0x2660 [ 41.232009] do_mmap+0x854/0xf00 [ 41.232435] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.232924] ksys_mmap_pgoff+0x3af/0x500 [ 41.233416] do_syscall_64+0x3f/0x90 [ 41.233882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.234521] [ 41.234732] The buggy address belongs to the object at ffff88800e523e80 [ 41.234732] which belongs to the cache vm_area_struct of size 168 [ 41.236182] The buggy address is located 88 bytes inside of [ 41.236182] freed 168-byte region [ffff88800e523e80, ffff88800e523f28) [ 41.237560] [ 41.237772] The buggy address belongs to the physical page: [ 41.238423] page:000000003d94b51d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe523 [ 41.239502] memcg:ffff88800c6afb01 [ 41.239919] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.240557] page_type: 0xffffffff() [ 41.241006] raw: 0100000000000200 ffff88800879fc80 ffffea0000379c40 dead000000000002 [ 41.241917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6afb01 [ 41.242829] page dumped because: kasan: bad access detected [ 41.243481] [ 41.243693] Memory state around the buggy address: [ 41.244268] ffff88800e523d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.245103] ffff88800e523e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.245947] >ffff88800e523e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.246791] ^ [ 41.247514] ffff88800e523f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.248368] ffff88800e523f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.249213] ================================================================== [ 41.250262] Disabling lock debugging due to kernel taint [ 43.325459] BUG: Bad rss-counter state mm:000000003078d822 type:MM_FILEPAGES val:33 [ 43.326214] BUG: Bad rss-counter state mm:000000003078d822 type:MM_ANONPAGES val:22 [ 43.846288] BUG: Bad rss-counter state mm:00000000c5692c41 type:MM_FILEPAGES val:33 [ 43.847492] BUG: Bad rss-counter state mm:00000000c5692c41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41657' (ECDSA) to the list of known hosts. 2023/06/19 13:32:55 fuzzer started 2023/06/19 13:32:55 dialing manager at localhost:44161 2023/06/19 13:32:55 checking machine... 2023/06/19 13:32:55 checking revisions... [ 44.467803] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:32:55 testing simple program... [ 44.523803] cgroup: Unknown subsys name 'net' [ 44.566013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d7f978 RCX=0000000000000001 RDX=1ffff110011aff2f RSI=ffff888008d7fe58 RDI=ffff888008d7f978 RBP=ffff888008d7fe58 RSP=ffff888008d7f8d0 R8 =ffffffff860d1680 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000fdc6 R12=0000000000000008 R13=ffff888008d7f9c0 R14=ffff888008d7fe60 R15=ffff888008d7f978 RIP=ffffffff8113042a RFL=00000202 [-------] 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 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=00007ffdc04eccd8 CR3=0000000005482000 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=00007f0ef980c51000005568ee8d8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860aefcb RBX=0000000000000001 RCX=ffffffff860aefc6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008e57988 RSP=ffff888008e578c0 R8 =ffffffff860aefca R9 =ffff888008e57970 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008e57990 R13=ffff888008e57978 R14=ffff888008e57f20 R15=ffff888008e57930 RIP=ffffffff81131134 RFL=00000293 [--S-A-C] 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=00007f984ec68750 CR3=0000000018e9a000 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=2034353a32333a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000