syzkaller login: [ 44.025435] BUG: Bad rss-counter state mm:00000000922a7104 type:MM_FILEPAGES val:33 [ 44.026719] BUG: Bad rss-counter state mm:00000000922a7104 type:MM_ANONPAGES val:22 [ 44.204469] ================================================================== [ 44.205380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.206364] Read of size 8 at addr ffff888016b9fc20 by task sshd/221 [ 44.207133] [ 44.207354] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.208364] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.209340] Call Trace: [ 44.209665] <TASK> [ 44.209958] dump_stack_lvl+0x91/0xf0 [ 44.210466] print_report+0xcc/0x620 [ 44.210964] ? __virt_addr_valid+0x102/0x340 [ 44.211524] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.212138] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.212762] kasan_report+0xbe/0xf0 [ 44.213250] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.213940] vma_interval_tree_remove+0xc75/0xec0 [ 44.214573] vma_prepare+0xc54/0x11a0 [ 44.215071] __split_vma+0x5af/0x950 [ 44.215573] ? __pfx___split_vma+0x10/0x10 [ 44.216123] ? find_held_lock+0x2c/0x110 [ 44.216670] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.217264] ? lock_is_held_type+0x9f/0x120 [ 44.217847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.218483] ? mtree_range_walk+0x632/0x900 [ 44.219063] ? mas_walk+0x5c7/0x7c0 [ 44.219555] do_vmi_munmap+0x1f1/0x2b0 [ 44.220068] mmap_region+0x1f9/0x2660 [ 44.220571] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.221110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.221867] ? __pfx_lock_acquire+0x10/0x10 [ 44.222431] ? __pfx_mmap_region+0x10/0x10 [ 44.222998] ? security_mmap_addr+0x7d/0xa0 [ 44.223558] ? get_unmapped_area+0x1f5/0x3f0 [ 44.224134] do_mmap+0x854/0xf00 [ 44.224592] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.225110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.225724] ksys_mmap_pgoff+0x3af/0x500 [ 44.226257] do_syscall_64+0x3f/0x90 [ 44.226763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.227440] RIP: 0033:0x7f50e6a12d82 [ 44.227922] 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 [ 44.230160] RSP: 002b:00007ffea9f0f1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.231115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50e6a12d82 [ 44.232017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50e5e4c000 [ 44.232910] RBP: 00007f50e5e4c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.233816] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed3f010ec0 [ 44.234711] R13: 00007ffea9f0f200 R14: 00007ffea9f0f230 R15: 00007ffea9f0f590 [ 44.235621] </TASK> [ 44.235930] [ 44.236157] Allocated by task 212: [ 44.236610] kasan_save_stack+0x22/0x50 [ 44.237157] kasan_set_track+0x25/0x30 [ 44.237675] __kasan_slab_alloc+0x59/0x70 [ 44.238248] kmem_cache_alloc+0x16b/0x370 [ 44.238799] vm_area_dup+0x20/0x160 [ 44.239284] __split_vma+0x170/0x950 [ 44.239775] split_vma+0xc6/0x110 [ 44.240245] mprotect_fixup+0x8d2/0xb30 [ 44.240773] do_mprotect_pkey+0x87e/0xd40 [ 44.241313] __x64_sys_mprotect+0x78/0xc0 [ 44.241866] do_syscall_64+0x3f/0x90 [ 44.242362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.243035] [ 44.243257] Freed by task 212: [ 44.243660] kasan_save_stack+0x22/0x50 [ 44.244188] kasan_set_track+0x25/0x30 [ 44.244707] kasan_save_free_info+0x2b/0x50 [ 44.245272] __kasan_slab_free+0x10a/0x190 [ 44.245840] kmem_cache_free+0x10d/0x4d0 [ 44.246383] rcu_core+0x8c8/0x2860 [ 44.246853] __do_softirq+0x1b7/0x7d4 [ 44.247364] [ 44.247589] Last potentially related work creation: [ 44.248205] kasan_save_stack+0x22/0x50 [ 44.248730] __kasan_record_aux_stack+0x8e/0xa0 [ 44.249376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.250064] remove_vma+0x139/0x170 [ 44.250541] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.251121] do_vmi_munmap+0x1f1/0x2b0 [ 44.251632] __vm_munmap+0x138/0x3a0 [ 44.252119] __x64_sys_munmap+0x59/0x80 [ 44.252642] do_syscall_64+0x3f/0x90 [ 44.253136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.253810] [ 44.254034] The buggy address belongs to the object at ffff888016b9fbc8 [ 44.254034] which belongs to the cache vm_area_struct of size 168 [ 44.255586] The buggy address is located 88 bytes inside of [ 44.255586] freed 168-byte region [ffff888016b9fbc8, ffff888016b9fc70) [ 44.257066] [ 44.257292] The buggy address belongs to the physical page: [ 44.258005] page:0000000033b0826e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b9f [ 44.259154] memcg:ffff88801673e701 [ 44.259598] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.260280] page_type: 0xffffffff() [ 44.260748] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.261729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801673e701 [ 44.262687] page dumped because: kasan: bad access detected [ 44.263384] [ 44.263606] Memory state around the buggy address: [ 44.264216] ffff888016b9fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.265120] ffff888016b9fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.266030] >ffff888016b9fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.266920] ^ [ 44.267475] ffff888016b9fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.268380] ffff888016b9fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.269275] ================================================================== [ 44.270350] Disabling lock debugging due to kernel taint [ 47.195422] BUG: Bad rss-counter state mm:00000000ce58ea19 type:MM_FILEPAGES val:33 [ 47.196433] BUG: Bad rss-counter state mm:00000000ce58ea19 type:MM_ANONPAGES val:22 [ 47.650414] BUG: Bad rss-counter state mm:0000000020d94be7 type:MM_FILEPAGES val:33 [ 47.651412] BUG: Bad rss-counter state mm:0000000020d94be7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60610' (ECDSA) to the list of known hosts. 2023/06/19 17:54:31 fuzzer started 2023/06/19 17:54:31 dialing manager at localhost:44161 2023/06/19 17:54:31 checking machine... 2023/06/19 17:54:31 checking revisions... [ 48.358678] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:54:31 testing simple program... [ 48.408550] cgroup: Unknown subsys name 'net' [ 48.450308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:54:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000081 RCX=ffffffff81f17e1a RDX=ffff88800fee98b0 RSI=fffffffffffff000 RDI=0000000000000007 RBP=ffff88800b670c98 RSP=ffff8880145b78d8 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800fee98b0 R11=00000000000b6996 R12=ffff88800fee98b0 R13=0000000010000000 R14=1ffff110028b6f1e R15=0000000000000000 RIP=ffffffff814c01d0 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 00007efcce200900 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=0000556ebf26d768 CR3=000000000d5fc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b4449aa14688cb5a00000000000ae988 XMM05=adba91887106b3f90000000000134758 XMM06=806171799158d96700000000001337f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff652058a8 CR3=0000000005482000 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=00007f60bc87f510000056397d369790 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