syzkaller login: [ 30.055657] BUG: Bad rss-counter state mm:000000007d3a876b type:MM_FILEPAGES val:33 [ 30.056664] BUG: Bad rss-counter state mm:000000007d3a876b type:MM_ANONPAGES val:22 [ 30.201706] ================================================================== [ 30.202632] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.203596] Read of size 8 at addr ffff88801a313968 by task sshd/220 [ 30.204398] [ 30.204806] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.205705] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.206702] Call Trace: [ 30.207060] [ 30.207348] dump_stack_lvl+0x91/0xf0 [ 30.207850] print_report+0xcc/0x620 [ 30.208356] ? __virt_addr_valid+0x102/0x340 [ 30.208932] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.209554] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.210182] kasan_report+0xbe/0xf0 [ 30.210662] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211296] vma_interval_tree_remove+0xc75/0xec0 [ 30.211909] vma_prepare+0xc54/0x11a0 [ 30.212406] __split_vma+0x5af/0x950 [ 30.212885] ? __pfx___split_vma+0x10/0x10 [ 30.213428] ? find_held_lock+0x2c/0x110 [ 30.213957] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.214534] ? lock_is_held_type+0x9f/0x120 [ 30.215071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.215683] ? mtree_range_walk+0x632/0x900 [ 30.216249] ? mas_walk+0x5c7/0x7c0 [ 30.216738] do_vmi_munmap+0x1f1/0x2b0 [ 30.217240] mmap_region+0x1f9/0x2660 [ 30.217720] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.218236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.218949] ? __pfx_lock_acquire+0x10/0x10 [ 30.219493] ? __pfx_mmap_region+0x10/0x10 [ 30.220031] ? security_mmap_addr+0x7d/0xa0 [ 30.220599] ? get_unmapped_area+0x1f5/0x3f0 [ 30.221166] do_mmap+0x854/0xf00 [ 30.221627] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.222139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.222705] ksys_mmap_pgoff+0x3af/0x500 [ 30.223230] do_syscall_64+0x3f/0x90 [ 30.223719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.224384] RIP: 0033:0x7f0607bded82 [ 30.224854] 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 [ 30.227018] RSP: 002b:00007ffdf8a7c368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.227953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0607bded82 [ 30.228840] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0607018000 [ 30.229721] RBP: 00007f0607018000 R08: 0000000000000009 R09: 0000000000001000 [ 30.230582] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558788035ec0 [ 30.231444] R13: 00007ffdf8a7c380 R14: 00007ffdf8a7c3b0 R15: 00007ffdf8a7c710 [ 30.232321] [ 30.232617] [ 30.232838] Allocated by task 213: [ 30.233270] kasan_save_stack+0x22/0x50 [ 30.233782] kasan_set_track+0x25/0x30 [ 30.234294] __kasan_slab_alloc+0x59/0x70 [ 30.234821] kmem_cache_alloc+0x16b/0x370 [ 30.235347] vm_area_dup+0x20/0x160 [ 30.235819] __split_vma+0x170/0x950 [ 30.236303] split_vma+0xc6/0x110 [ 30.236750] mprotect_fixup+0x8d2/0xb30 [ 30.237267] do_mprotect_pkey+0x87e/0xd40 [ 30.237797] __x64_sys_mprotect+0x78/0xc0 [ 30.238329] do_syscall_64+0x3f/0x90 [ 30.238827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.239505] [ 30.239736] Freed by task 213: [ 30.240156] kasan_save_stack+0x22/0x50 [ 30.240713] kasan_set_track+0x25/0x30 [ 30.241233] kasan_save_free_info+0x2b/0x50 [ 30.241794] __kasan_slab_free+0x10a/0x190 [ 30.242349] kmem_cache_free+0x10d/0x4d0 [ 30.242899] rcu_core+0x8c8/0x2860 [ 30.243377] __do_softirq+0x1b7/0x7d4 [ 30.243890] [ 30.244119] Last potentially related work creation: [ 30.244758] kasan_save_stack+0x22/0x50 [ 30.245295] __kasan_record_aux_stack+0x8e/0xa0 [ 30.245947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.246640] remove_vma+0x139/0x170 [ 30.247117] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.247705] do_vmi_munmap+0x1f1/0x2b0 [ 30.248226] __vm_munmap+0x138/0x3a0 [ 30.248737] __x64_sys_munmap+0x59/0x80 [ 30.249273] do_syscall_64+0x3f/0x90 [ 30.249772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250463] [ 30.250690] The buggy address belongs to the object at ffff88801a313910 [ 30.250690] which belongs to the cache vm_area_struct of size 168 [ 30.252277] The buggy address is located 88 bytes inside of [ 30.252277] freed 168-byte region [ffff88801a313910, ffff88801a3139b8) [ 30.253773] [ 30.254003] The buggy address belongs to the physical page: [ 30.254708] page:00000000dda34b78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a313 [ 30.255879] memcg:ffff88800c5b2401 [ 30.256345] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.257032] page_type: 0xffffffff() [ 30.257513] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.258485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5b2401 [ 30.259457] page dumped because: kasan: bad access detected [ 30.260168] [ 30.260406] Memory state around the buggy address: [ 30.261021] ffff88801a313800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.261927] ffff88801a313880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.262838] >ffff88801a313900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.263741] ^ [ 30.264581] ffff88801a313980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.265510] ffff88801a313a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.266427] ================================================================== [ 30.267393] Disabling lock debugging due to kernel taint [ 32.911556] BUG: Bad rss-counter state mm:00000000ebfb0ff1 type:MM_FILEPAGES val:33 [ 32.912766] BUG: Bad rss-counter state mm:00000000ebfb0ff1 type:MM_ANONPAGES val:22 [ 33.365812] BUG: Bad rss-counter state mm:0000000017ac59bc type:MM_FILEPAGES val:33 [ 33.366820] BUG: Bad rss-counter state mm:0000000017ac59bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40915' (ECDSA) to the list of known hosts. 2023/06/20 16:03:12 fuzzer started 2023/06/20 16:03:12 dialing manager at localhost:36067 2023/06/20 16:03:12 checking machine... 2023/06/20 16:03:12 checking revisions... [ 34.110439] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:03:13 testing simple program... [ 34.163141] cgroup: Unknown subsys name 'net' [ 34.201298] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:12 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000008 RCX=ffffffff844a504f RDX=ffff8880166e0000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800cb4da08 RSP=ffff88800f8dfce0 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=00007f74fb7fc044 R15=00007f74fb080fff RIP=ffffffff814c086b RFL=00000297 [--S-APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f74faca8900 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=00007f74fb7fc044 CR3=000000000c82c000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=b5122bcf5077db041402eb137e266614 XMM05=000000000000000000000000000000ff XMM06=b50112ca506b8d04140285137e263a00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007fe9fd5a8360 CR3=000000000c722000 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=00000000000000000000000000000000 XMM01=2b74bd68ba1854a33e42fe3af671f8be XMM02=000000000011ce28eff9b2d0a8fce9cb XMM03=000000000011cef82c67c8bc2e329bc3 XMM04=c9d54236c657017400000000000ae988 XMM05=19e9129bd510f2350000000000131448 XMM06=4fda316b135da52b00000000001312d0 XMM07=e042d86d42eb936e00000000001217e0 XMM08=752c2846da30dea2000000000011cef8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000