syzkaller login: [ 60.117096] BUG: Bad rss-counter state mm:000000005e052511 type:MM_FILEPAGES val:33 [ 60.118109] BUG: Bad rss-counter state mm:000000005e052511 type:MM_ANONPAGES val:22 [ 60.274834] ================================================================== [ 60.275751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.276696] Read of size 8 at addr ffff88800fccdb38 by task sshd/219 [ 60.277483] [ 60.277718] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.278697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.279668] Call Trace: [ 60.280000] [ 60.280283] dump_stack_lvl+0x91/0xf0 [ 60.280800] print_report+0xcc/0x620 [ 60.281301] ? __virt_addr_valid+0x102/0x340 [ 60.281886] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.282506] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.283121] kasan_report+0xbe/0xf0 [ 60.283596] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.284211] vma_interval_tree_remove+0xc75/0xec0 [ 60.284810] vma_prepare+0xc54/0x11a0 [ 60.285288] __split_vma+0x5af/0x950 [ 60.285781] ? __pfx___split_vma+0x10/0x10 [ 60.286312] ? find_held_lock+0x2c/0x110 [ 60.286832] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.287411] ? lock_is_held_type+0x9f/0x120 [ 60.287948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.288552] ? mtree_range_walk+0x632/0x900 [ 60.289105] ? mas_walk+0x5c7/0x7c0 [ 60.289585] do_vmi_munmap+0x1f1/0x2b0 [ 60.290086] mmap_region+0x1f9/0x2660 [ 60.290575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.291085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.291790] ? __pfx_lock_acquire+0x10/0x10 [ 60.292318] ? __pfx_mmap_region+0x10/0x10 [ 60.292847] ? security_mmap_addr+0x7d/0xa0 [ 60.293376] ? get_unmapped_area+0x1f5/0x3f0 [ 60.293949] do_mmap+0x854/0xf00 [ 60.294393] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.294915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.295481] ksys_mmap_pgoff+0x3af/0x500 [ 60.295997] do_syscall_64+0x3f/0x90 [ 60.296478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.297123] RIP: 0033:0x7fcc1f6c6d82 [ 60.297594] 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 [ 60.299700] RSP: 002b:00007ffd7df53738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.300605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc1f6c6d82 [ 60.301474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc1eb00000 [ 60.302338] RBP: 00007fcc1eb00000 R08: 0000000000000009 R09: 0000000000001000 [ 60.303188] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624b0e61f70 [ 60.304049] R13: 00007ffd7df53750 R14: 00007ffd7df53780 R15: 00007ffd7df53ae0 [ 60.304909] [ 60.305204] [ 60.305421] Allocated by task 212: [ 60.305867] kasan_save_stack+0x22/0x50 [ 60.306367] kasan_set_track+0x25/0x30 [ 60.306854] __kasan_slab_alloc+0x59/0x70 [ 60.307381] kmem_cache_alloc+0x16b/0x370 [ 60.307906] vm_area_dup+0x20/0x160 [ 60.308363] __split_vma+0x170/0x950 [ 60.308828] split_vma+0xc6/0x110 [ 60.309271] mprotect_fixup+0x8d2/0xb30 [ 60.309779] do_mprotect_pkey+0x87e/0xd40 [ 60.310306] __x64_sys_mprotect+0x78/0xc0 [ 60.310834] do_syscall_64+0x3f/0x90 [ 60.311311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.311958] [ 60.312171] Freed by task 209: [ 60.312564] kasan_save_stack+0x22/0x50 [ 60.313069] kasan_set_track+0x25/0x30 [ 60.313577] kasan_save_free_info+0x2b/0x50 [ 60.314114] __kasan_slab_free+0x10a/0x190 [ 60.314646] kmem_cache_free+0x10d/0x4d0 [ 60.315157] rcu_core+0x8c8/0x2860 [ 60.315605] __do_softirq+0x1b7/0x7d4 [ 60.316082] [ 60.316299] Last potentially related work creation: [ 60.316879] kasan_save_stack+0x22/0x50 [ 60.317384] __kasan_record_aux_stack+0x8e/0xa0 [ 60.317969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.318603] remove_vma+0x139/0x170 [ 60.319125] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.319675] do_vmi_munmap+0x1f1/0x2b0 [ 60.320159] __vm_munmap+0x138/0x3a0 [ 60.320627] __x64_sys_munmap+0x59/0x80 [ 60.321133] do_syscall_64+0x3f/0x90 [ 60.321619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.322258] [ 60.322474] The buggy address belongs to the object at ffff88800fccdae0 [ 60.322474] which belongs to the cache vm_area_struct of size 168 [ 60.323938] The buggy address is located 88 bytes inside of [ 60.323938] freed 168-byte region [ffff88800fccdae0, ffff88800fccdb88) [ 60.325323] [ 60.325552] The buggy address belongs to the physical page: [ 60.326202] page:0000000089dd4b52 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfccd [ 60.327282] memcg:ffff8880164d9d01 [ 60.327711] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.328360] page_type: 0xffffffff() [ 60.328812] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.329737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164d9d01 [ 60.330643] page dumped because: kasan: bad access detected [ 60.331304] [ 60.331522] Memory state around the buggy address: [ 60.332110] ffff88800fccda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.332958] ffff88800fccda80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 60.333828] >ffff88800fccdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.334675] ^ [ 60.335279] ffff88800fccdb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.336130] ffff88800fccdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.336977] ================================================================== [ 60.338012] Disabling lock debugging due to kernel taint [ 62.322434] BUG: Bad rss-counter state mm:00000000e4157cdc type:MM_FILEPAGES val:33 [ 62.323729] BUG: Bad rss-counter state mm:00000000e4157cdc type:MM_ANONPAGES val:22 [ 62.706698] BUG: Bad rss-counter state mm:00000000f36b69a0 type:MM_FILEPAGES val:33 [ 62.708011] BUG: Bad rss-counter state mm:00000000f36b69a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52130' (ECDSA) to the list of known hosts. 2023/06/21 06:25:19 fuzzer started 2023/06/21 06:25:20 dialing manager at localhost:36067 2023/06/21 06:25:20 checking machine... 2023/06/21 06:25:20 checking revisions... [ 63.366733] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:25:20 testing simple program... [ 63.417414] cgroup: Unknown subsys name 'net' [ 63.469490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:25:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863de43c RDX=ffff88801a1374e0 RSI=1ffff11003426e9e RDI=1ffff11003426e9e RBP=ffff88801a1374f0 RSP=ffff88801a137428 R8 =ffffffff863de440 R9 =ffff88801a1374d8 R10=0000000000038001 R11=0000000000091bde R12=ffff88801a1374f8 R13=ffff88801a1374e0 R14=ffff88801a137a38 R15=ffff88801a137498 RIP=ffffffff811310a7 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 00007fd6be70e900 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=00007fffa6776000 CR3=000000000b2fc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=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=00007f4268502040 CR3=000000000d650000 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=a558d90b3f7552a9fd4900de1af9b37d XMM02=ec2efd57dc4c00df000000000011d210 XMM03=c23eea2533c884da000000000011d2e0 XMM04=805635846fe479b400000000000ae988 XMM05=dfcdbad4f1609c370000000000131858 XMM06=38abc1d47efc715000000000001306c0 XMM07=e042d86d42eb936e0000000000121c68 XMM08=c23eea2533c884da000000000011d2e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000