syzkaller login: [ 30.476628] BUG: Bad rss-counter state mm:0000000083c53201 type:MM_FILEPAGES val:33 [ 30.478050] BUG: Bad rss-counter state mm:0000000083c53201 type:MM_ANONPAGES val:22 [ 30.652260] ================================================================== [ 30.653191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.654159] Read of size 8 at addr ffff888014231968 by task sshd/220 [ 30.654939] [ 30.655167] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.656156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.657143] Call Trace: [ 30.657464] [ 30.657757] dump_stack_lvl+0x91/0xf0 [ 30.658259] print_report+0xcc/0x620 [ 30.658745] ? __virt_addr_valid+0x102/0x340 [ 30.659312] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.659964] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.660609] kasan_report+0xbe/0xf0 [ 30.661099] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.661741] vma_interval_tree_remove+0xc75/0xec0 [ 30.662337] vma_prepare+0xc54/0x11a0 [ 30.662818] __split_vma+0x5af/0x950 [ 30.663288] ? __pfx___split_vma+0x10/0x10 [ 30.663821] ? find_held_lock+0x2c/0x110 [ 30.664339] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.664901] ? lock_is_held_type+0x9f/0x120 [ 30.665437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.666040] ? mtree_range_walk+0x632/0x900 [ 30.666591] ? mas_walk+0x5c7/0x7c0 [ 30.667063] do_vmi_munmap+0x1f1/0x2b0 [ 30.667553] mmap_region+0x1f9/0x2660 [ 30.668053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.668563] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.669269] ? __pfx_lock_acquire+0x10/0x10 [ 30.669799] ? __pfx_mmap_region+0x10/0x10 [ 30.670325] ? security_mmap_addr+0x7d/0xa0 [ 30.670856] ? get_unmapped_area+0x1f5/0x3f0 [ 30.671401] do_mmap+0x854/0xf00 [ 30.671853] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.672344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.672907] ksys_mmap_pgoff+0x3af/0x500 [ 30.673414] do_syscall_64+0x3f/0x90 [ 30.673892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.674536] RIP: 0033:0x7fd74c1fcd82 [ 30.674991] 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 [ 30.677112] RSP: 002b:00007fff7e07ea58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.678020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd74c1fcd82 [ 30.678858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd74b636000 [ 30.679718] RBP: 00007fd74b636000 R08: 0000000000000009 R09: 0000000000001000 [ 30.680563] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581245e6d90 [ 30.681408] R13: 00007fff7e07ea70 R14: 00007fff7e07eaa0 R15: 00007fff7e07ee00 [ 30.682272] [ 30.682567] [ 30.682782] Allocated by task 213: [ 30.683205] kasan_save_stack+0x22/0x50 [ 30.683713] kasan_set_track+0x25/0x30 [ 30.684204] __kasan_slab_alloc+0x59/0x70 [ 30.684724] kmem_cache_alloc+0x16b/0x370 [ 30.685240] vm_area_dup+0x20/0x160 [ 30.685692] __split_vma+0x170/0x950 [ 30.686157] split_vma+0xc6/0x110 [ 30.686597] mprotect_fixup+0x8d2/0xb30 [ 30.687101] do_mprotect_pkey+0x87e/0xd40 [ 30.687632] __x64_sys_mprotect+0x78/0xc0 [ 30.688177] do_syscall_64+0x3f/0x90 [ 30.688657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689303] [ 30.689517] Freed by task 210: [ 30.689915] kasan_save_stack+0x22/0x50 [ 30.690427] kasan_set_track+0x25/0x30 [ 30.690931] kasan_save_free_info+0x2b/0x50 [ 30.691461] __kasan_slab_free+0x10a/0x190 [ 30.692017] kmem_cache_free+0x10d/0x4d0 [ 30.692528] rcu_core+0x8c8/0x2860 [ 30.692985] __do_softirq+0x1b7/0x7d4 [ 30.693461] [ 30.693677] Last potentially related work creation: [ 30.694271] kasan_save_stack+0x22/0x50 [ 30.694777] __kasan_record_aux_stack+0x8e/0xa0 [ 30.695343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.696005] remove_vma+0x139/0x170 [ 30.696459] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.697019] do_vmi_munmap+0x1f1/0x2b0 [ 30.697499] __vm_munmap+0x138/0x3a0 [ 30.697967] __x64_sys_munmap+0x59/0x80 [ 30.698469] do_syscall_64+0x3f/0x90 [ 30.698943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699582] [ 30.699811] The buggy address belongs to the object at ffff888014231910 [ 30.699811] which belongs to the cache vm_area_struct of size 168 [ 30.701263] The buggy address is located 88 bytes inside of [ 30.701263] freed 168-byte region [ffff888014231910, ffff8880142319b8) [ 30.702669] [ 30.702887] The buggy address belongs to the physical page: [ 30.703540] page:0000000039f76520 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14231 [ 30.704638] memcg:ffff88800f000501 [ 30.705064] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.705708] page_type: 0xffffffff() [ 30.706158] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.707075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f000501 [ 30.707985] page dumped because: kasan: bad access detected [ 30.708645] [ 30.708860] Memory state around the buggy address: [ 30.709432] ffff888014231800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.710295] ffff888014231880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.711148] >ffff888014231900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.712010] ^ [ 30.712791] ffff888014231980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.713644] ffff888014231a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.714495] ================================================================== [ 30.715706] Disabling lock debugging due to kernel taint [ 33.085489] BUG: Bad rss-counter state mm:0000000015c535e2 type:MM_FILEPAGES val:33 [ 33.086227] BUG: Bad rss-counter state mm:0000000015c535e2 type:MM_ANONPAGES val:22 [ 33.511306] BUG: Bad rss-counter state mm:0000000032080d4d type:MM_FILEPAGES val:33 [ 33.512044] BUG: Bad rss-counter state mm:0000000032080d4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31414' (ECDSA) to the list of known hosts. 2023/06/21 06:07:54 fuzzer started 2023/06/21 06:07:55 dialing manager at localhost:36067 2023/06/21 06:07:55 checking machine... 2023/06/21 06:07:55 checking revisions... [ 34.238904] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:07:55 testing simple program... [ 34.287944] cgroup: Unknown subsys name 'net' [ 34.338465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:07:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138e01 RDX=1ffff1100d9c135e RSI=ffffffff8180f5bb RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138eb4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801036b680 R15=ffff88806ce09a98 RIP=ffffffff8113062c 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 00007f09e9c5c900 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=00007f09e9076f00 CR3=000000000d788000 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=2f9669004323848700000000000ae988 XMM05=ad92bc2674d61ec400000000001334a0 XMM06=4fda316b135da52b0000000000132290 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000078 RBX=0000560b146cdf70 RCX=000000000000000b RDX=0000000000000280 RSI=000000000000004e RDI=0000560b146b0b20 RBP=00007ffc46fc32f0 RSP=00007ffc46fc3290 R8 =0000560b146dd10b R9 =00007f841ab4ebe0 R10=0000000000000100 R11=0000000000000246 R12=000000000000004d R13=0000560b146dd157 R14=000000000000004d R15=0000000000000000 RIP=00007f841aa05788 RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f841a59c900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc46fbd000 CR3=000000000e24c000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=746c75616665642065685420202a4445 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000ffffffffffffffffffffffffffff XMM08=696e696d206572612079656874282023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000