syzkaller login: [ 31.392642] BUG: Bad rss-counter state mm:0000000065e497fa type:MM_FILEPAGES val:33 [ 31.393782] BUG: Bad rss-counter state mm:0000000065e497fa type:MM_ANONPAGES val:22 [ 31.540049] ================================================================== [ 31.540944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.541871] Read of size 8 at addr ffff88800f2a7d08 by task sshd/219 [ 31.542628] [ 31.542844] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.543783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.544748] Call Trace: [ 31.545066] [ 31.545346] dump_stack_lvl+0x91/0xf0 [ 31.545835] print_report+0xcc/0x620 [ 31.546317] ? __virt_addr_valid+0x102/0x340 [ 31.546867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.547492] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.548096] kasan_report+0xbe/0xf0 [ 31.548564] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.549179] vma_interval_tree_remove+0xc75/0xec0 [ 31.549770] vma_prepare+0xc54/0x11a0 [ 31.550243] __split_vma+0x5af/0x950 [ 31.550709] ? __pfx___split_vma+0x10/0x10 [ 31.551239] ? find_held_lock+0x2c/0x110 [ 31.551760] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.552315] ? lock_is_held_type+0x9f/0x120 [ 31.552856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.553456] ? mtree_range_walk+0x632/0x900 [ 31.554008] ? mas_walk+0x5c7/0x7c0 [ 31.554475] do_vmi_munmap+0x1f1/0x2b0 [ 31.554964] mmap_region+0x1f9/0x2660 [ 31.555459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.555966] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.556665] ? __pfx_lock_acquire+0x10/0x10 [ 31.557194] ? __pfx_mmap_region+0x10/0x10 [ 31.557721] ? security_mmap_addr+0x7d/0xa0 [ 31.558246] ? get_unmapped_area+0x1f5/0x3f0 [ 31.558784] do_mmap+0x854/0xf00 [ 31.559222] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.559709] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.560268] ksys_mmap_pgoff+0x3af/0x500 [ 31.560769] do_syscall_64+0x3f/0x90 [ 31.561240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.561880] RIP: 0033:0x7fe6add2ed82 [ 31.562335] 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 [ 31.564441] RSP: 002b:00007ffdf7cf52d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.565328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6add2ed82 [ 31.566163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6ad168000 [ 31.567007] RBP: 00007fe6ad168000 R08: 0000000000000009 R09: 0000000000001000 [ 31.567847] R10: 0000000000000812 R11: 0000000000000206 R12: 000055815bae0d90 [ 31.568683] R13: 00007ffdf7cf52f0 R14: 00007ffdf7cf5320 R15: 00007ffdf7cf5680 [ 31.569526] [ 31.569816] [ 31.570032] Allocated by task 212: [ 31.570453] kasan_save_stack+0x22/0x50 [ 31.570952] kasan_set_track+0x25/0x30 [ 31.571452] __kasan_slab_alloc+0x59/0x70 [ 31.571970] kmem_cache_alloc+0x16b/0x370 [ 31.572478] vm_area_dup+0x20/0x160 [ 31.572927] __split_vma+0x170/0x950 [ 31.573386] split_vma+0xc6/0x110 [ 31.573823] mprotect_fixup+0x8d2/0xb30 [ 31.574321] do_mprotect_pkey+0x87e/0xd40 [ 31.574835] __x64_sys_mprotect+0x78/0xc0 [ 31.575366] do_syscall_64+0x3f/0x90 [ 31.575837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.576478] [ 31.576691] Freed by task 212: [ 31.577077] kasan_save_stack+0x22/0x50 [ 31.577574] kasan_set_track+0x25/0x30 [ 31.578067] kasan_save_free_info+0x2b/0x50 [ 31.578594] __kasan_slab_free+0x10a/0x190 [ 31.579128] kmem_cache_free+0x10d/0x4d0 [ 31.579632] rcu_core+0x8c8/0x2860 [ 31.580072] __do_softirq+0x1b7/0x7d4 [ 31.580545] [ 31.580757] Last potentially related work creation: [ 31.581336] kasan_save_stack+0x22/0x50 [ 31.581833] __kasan_record_aux_stack+0x8e/0xa0 [ 31.582399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.583044] remove_vma+0x139/0x170 [ 31.583488] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.584037] do_vmi_munmap+0x1f1/0x2b0 [ 31.584518] __vm_munmap+0x138/0x3a0 [ 31.584973] __x64_sys_munmap+0x59/0x80 [ 31.585469] do_syscall_64+0x3f/0x90 [ 31.585939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586580] [ 31.586792] The buggy address belongs to the object at ffff88800f2a7cb0 [ 31.586792] which belongs to the cache vm_area_struct of size 168 [ 31.588241] The buggy address is located 88 bytes inside of [ 31.588241] freed 168-byte region [ffff88800f2a7cb0, ffff88800f2a7d58) [ 31.589623] [ 31.589839] The buggy address belongs to the physical page: [ 31.590490] page:00000000beeac579 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a7 [ 31.591562] memcg:ffff88800fd98e01 [ 31.591980] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.592618] page_type: 0xffffffff() [ 31.593061] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.593960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd98e01 [ 31.594852] page dumped because: kasan: bad access detected [ 31.595514] [ 31.595729] Memory state around the buggy address: [ 31.596303] ffff88800f2a7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.597153] ffff88800f2a7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.597994] >ffff88800f2a7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.598827] ^ [ 31.599273] ffff88800f2a7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.600115] ffff88800f2a7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.600947] ================================================================== [ 31.601914] Disabling lock debugging due to kernel taint [ 33.355478] BUG: Bad rss-counter state mm:00000000d3a4015f type:MM_FILEPAGES val:33 [ 33.356163] BUG: Bad rss-counter state mm:00000000d3a4015f type:MM_ANONPAGES val:22 [ 33.809862] BUG: Bad rss-counter state mm:00000000cd819cdf type:MM_FILEPAGES val:33 [ 33.810703] BUG: Bad rss-counter state mm:00000000cd819cdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17199' (ECDSA) to the list of known hosts. 2023/06/21 05:30:00 fuzzer started 2023/06/21 05:30:00 dialing manager at localhost:36067 2023/06/21 05:30:01 checking machine... 2023/06/21 05:30:01 checking revisions... [ 34.482509] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:30:01 testing simple program... [ 34.520875] cgroup: Unknown subsys name 'net' [ 34.560544] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffd12322e8 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=00007f092564b51000005607e48e5790 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=0000000000000001 RBX=ffff88800efe75c8 RCX=ffffffff86138e01 RDX=1ffff11001dfcec4 RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffff88800efe7620 RSP=ffff88800efe75b0 R8 =ffffffff86138e90 R9 =ffff88800efe7608 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800efe7690 R13=0000000000000000 R14=ffff8880101dd1c0 R15=0000000000000000 RIP=ffffffff81130399 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 00007f5e87fff700 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=00007ffbc1ebff70 CR3=000000001a4fa000 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=2030303a30333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a30333a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000