syzkaller login: [ 31.368070] BUG: Bad rss-counter state mm:00000000ba40b927 type:MM_FILEPAGES val:33 [ 31.369352] BUG: Bad rss-counter state mm:00000000ba40b927 type:MM_ANONPAGES val:22 [ 31.577859] ================================================================== [ 31.578947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.580062] Read of size 8 at addr ffff888010293310 by task sshd/224 [ 31.581133] [ 31.581400] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.582422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.583695] Call Trace: [ 31.584077] [ 31.584422] dump_stack_lvl+0x91/0xf0 [ 31.585027] print_report+0xcc/0x620 [ 31.585606] ? __virt_addr_valid+0x102/0x340 [ 31.586264] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.587008] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.587776] kasan_report+0xbe/0xf0 [ 31.588369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589145] vma_interval_tree_remove+0xc75/0xec0 [ 31.589898] vma_prepare+0xc54/0x11a0 [ 31.590497] __split_vma+0x5af/0x950 [ 31.591074] ? __pfx___split_vma+0x10/0x10 [ 31.591735] ? find_held_lock+0x2c/0x110 [ 31.592388] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.593110] ? lock_is_held_type+0x9f/0x120 [ 31.593690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.594336] ? mtree_range_walk+0x632/0x900 [ 31.594929] ? mas_walk+0x5c7/0x7c0 [ 31.595442] do_vmi_munmap+0x1f1/0x2b0 [ 31.595994] mmap_region+0x1f9/0x2660 [ 31.596506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.597061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.597828] ? __pfx_lock_acquire+0x10/0x10 [ 31.598416] ? __pfx_mmap_region+0x10/0x10 [ 31.598990] ? security_mmap_addr+0x7d/0xa0 [ 31.599533] ? get_unmapped_area+0x1f5/0x3f0 [ 31.600092] do_mmap+0x854/0xf00 [ 31.600588] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.601132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.601755] ksys_mmap_pgoff+0x3af/0x500 [ 31.602301] do_syscall_64+0x3f/0x90 [ 31.602787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603469] RIP: 0033:0x7f250129ad82 [ 31.603983] 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 [ 31.606304] RSP: 002b:00007ffd1747d968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.607311] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f250129ad82 [ 31.608240] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25006d4000 [ 31.609171] RBP: 00007f25006d4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.610096] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc3f695f60 [ 31.611021] R13: 00007ffd1747d980 R14: 00007ffd1747d9b0 R15: 00007ffd1747dd10 [ 31.611898] [ 31.612204] [ 31.612441] Allocated by task 215: [ 31.612928] kasan_save_stack+0x22/0x50 [ 31.613482] kasan_set_track+0x25/0x30 [ 31.614022] __kasan_slab_alloc+0x59/0x70 [ 31.614593] kmem_cache_alloc+0x16b/0x370 [ 31.615162] vm_area_dup+0x20/0x160 [ 31.615671] __split_vma+0x170/0x950 [ 31.616188] split_vma+0xc6/0x110 [ 31.616684] mprotect_fixup+0x8d2/0xb30 [ 31.617239] do_mprotect_pkey+0x87e/0xd40 [ 31.617821] __x64_sys_mprotect+0x78/0xc0 [ 31.618404] do_syscall_64+0x3f/0x90 [ 31.618931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.619604] [ 31.619818] Freed by task 215: [ 31.620231] kasan_save_stack+0x22/0x50 [ 31.620794] kasan_set_track+0x25/0x30 [ 31.621328] kasan_save_free_info+0x2b/0x50 [ 31.621933] __kasan_slab_free+0x10a/0x190 [ 31.622469] kmem_cache_free+0x10d/0x4d0 [ 31.622975] rcu_core+0x8c8/0x2860 [ 31.623433] __do_softirq+0x1b7/0x7d4 [ 31.623911] [ 31.624131] Last potentially related work creation: [ 31.624737] kasan_save_stack+0x22/0x50 [ 31.625245] __kasan_record_aux_stack+0x8e/0xa0 [ 31.625828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.626489] remove_vma+0x139/0x170 [ 31.626946] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.627506] do_vmi_munmap+0x1f1/0x2b0 [ 31.627998] __vm_munmap+0x138/0x3a0 [ 31.628464] __x64_sys_munmap+0x59/0x80 [ 31.628982] do_syscall_64+0x3f/0x90 [ 31.629463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630122] [ 31.630339] The buggy address belongs to the object at ffff8880102932b8 [ 31.630339] which belongs to the cache vm_area_struct of size 168 [ 31.631808] The buggy address is located 88 bytes inside of [ 31.631808] freed 168-byte region [ffff8880102932b8, ffff888010293360) [ 31.633224] [ 31.633441] The buggy address belongs to the physical page: [ 31.634097] page:000000009d9f361b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10293 [ 31.635190] memcg:ffff888018f86201 [ 31.635618] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.636262] page_type: 0xffffffff() [ 31.636717] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.637645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f86201 [ 31.638547] page dumped because: kasan: bad access detected [ 31.639203] [ 31.639423] Memory state around the buggy address: [ 31.640001] ffff888010293200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.640868] ffff888010293280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.641722] >ffff888010293300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.642581] ^ [ 31.643051] ffff888010293380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.643911] ffff888010293400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.644788] ================================================================== [ 31.645743] Disabling lock debugging due to kernel taint [ 33.670544] BUG: Bad rss-counter state mm:000000005604ae61 type:MM_FILEPAGES val:33 [ 33.671724] BUG: Bad rss-counter state mm:000000005604ae61 type:MM_ANONPAGES val:22 [ 34.098295] BUG: Bad rss-counter state mm:00000000a9db86e6 type:MM_FILEPAGES val:33 [ 34.099461] BUG: Bad rss-counter state mm:00000000a9db86e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14450' (ECDSA) to the list of known hosts. 2023/06/20 14:24:14 fuzzer started 2023/06/20 14:24:14 dialing manager at localhost:36067 2023/06/20 14:24:14 checking machine... 2023/06/20 14:24:14 checking revisions... [ 34.826746] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:24:14 testing simple program... [ 34.878969] cgroup: Unknown subsys name 'net' [ 34.914328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:14 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801606d938 RCX=ffffffff818d5246 RDX=ffff88801467b680 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000007 RSP=ffff888016b0f998 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=00676f6c2d766564 R14=dffffc0000000000 R15=ffff88801606d968 RIP=ffffffff814c086b 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 00007f6e1220d900 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=00007f6e127c2650 CR3=000000001be40000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007f337b0fc530 CR3=000000000f45e000 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=2033313a34323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a34323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000