syzkaller login: [ 38.750935] BUG: Bad rss-counter state mm:000000009c5e9ddc type:MM_FILEPAGES val:33 [ 38.752703] BUG: Bad rss-counter state mm:000000009c5e9ddc type:MM_ANONPAGES val:22 [ 38.919927] ================================================================== [ 38.920847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.921773] Read of size 8 at addr ffff888016455d08 by task sshd/227 [ 38.922533] [ 38.922754] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.923852] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.924818] Call Trace: [ 38.925137] [ 38.925424] dump_stack_lvl+0x91/0xf0 [ 38.925912] print_report+0xcc/0x620 [ 38.926391] ? __virt_addr_valid+0x102/0x340 [ 38.926965] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.927574] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.928189] kasan_report+0xbe/0xf0 [ 38.928663] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.929271] vma_interval_tree_remove+0xc75/0xec0 [ 38.929868] vma_prepare+0xc54/0x11a0 [ 38.930349] __split_vma+0x5af/0x950 [ 38.930817] ? __pfx___split_vma+0x10/0x10 [ 38.931363] ? find_held_lock+0x2c/0x110 [ 38.931884] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.932444] ? lock_is_held_type+0x9f/0x120 [ 38.932980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.933585] ? mtree_range_walk+0x632/0x900 [ 38.934136] ? mas_walk+0x5c7/0x7c0 [ 38.934613] do_vmi_munmap+0x1f1/0x2b0 [ 38.935116] mmap_region+0x1f9/0x2660 [ 38.935591] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.936103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.936819] ? __pfx_lock_acquire+0x10/0x10 [ 38.937344] ? __pfx_mmap_region+0x10/0x10 [ 38.937872] ? security_mmap_addr+0x7d/0xa0 [ 38.938402] ? get_unmapped_area+0x1f5/0x3f0 [ 38.938970] do_mmap+0x854/0xf00 [ 38.939408] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.939897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.940459] ksys_mmap_pgoff+0x3af/0x500 [ 38.940960] do_syscall_64+0x3f/0x90 [ 38.941438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942090] RIP: 0033:0x7f4207816d82 [ 38.942547] 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 [ 38.944694] RSP: 002b:00007ffd54b97bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.945594] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4207816d82 [ 38.946436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4206c50000 [ 38.947282] RBP: 00007f4206c50000 R08: 0000000000000009 R09: 0000000000001000 [ 38.948127] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a95db9ec0 [ 38.948980] R13: 00007ffd54b97c10 R14: 00007ffd54b97c40 R15: 00007ffd54b97fa0 [ 38.949834] [ 38.950125] [ 38.950338] Allocated by task 220: [ 38.950769] kasan_save_stack+0x22/0x50 [ 38.951285] kasan_set_track+0x25/0x30 [ 38.951780] __kasan_slab_alloc+0x59/0x70 [ 38.952302] kmem_cache_alloc+0x16b/0x370 [ 38.952814] vm_area_dup+0x20/0x160 [ 38.953264] __split_vma+0x170/0x950 [ 38.953729] split_vma+0xc6/0x110 [ 38.954165] mprotect_fixup+0x8d2/0xb30 [ 38.954664] do_mprotect_pkey+0x87e/0xd40 [ 38.955187] __x64_sys_mprotect+0x78/0xc0 [ 38.955702] do_syscall_64+0x3f/0x90 [ 38.956174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956818] [ 38.957029] Freed by task 220: [ 38.957421] kasan_save_stack+0x22/0x50 [ 38.957919] kasan_set_track+0x25/0x30 [ 38.958413] kasan_save_free_info+0x2b/0x50 [ 38.958962] __kasan_slab_free+0x10a/0x190 [ 38.959497] kmem_cache_free+0x10d/0x4d0 [ 38.960001] rcu_core+0x8c8/0x2860 [ 38.960446] __do_softirq+0x1b7/0x7d4 [ 38.960921] [ 38.961135] Last potentially related work creation: [ 38.961719] kasan_save_stack+0x22/0x50 [ 38.962219] __kasan_record_aux_stack+0x8e/0xa0 [ 38.962789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.963448] remove_vma+0x139/0x170 [ 38.963908] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.964461] do_vmi_munmap+0x1f1/0x2b0 [ 38.964947] __vm_munmap+0x138/0x3a0 [ 38.965531] __x64_sys_munmap+0x59/0x80 [ 38.966027] do_syscall_64+0x3f/0x90 [ 38.966503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.967165] [ 38.967388] The buggy address belongs to the object at ffff888016455cb0 [ 38.967388] which belongs to the cache vm_area_struct of size 168 [ 38.968861] The buggy address is located 88 bytes inside of [ 38.968861] freed 168-byte region [ffff888016455cb0, ffff888016455d58) [ 38.970248] [ 38.970464] The buggy address belongs to the physical page: [ 38.971135] page:000000004f214ee2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16455 [ 38.972212] memcg:ffff88800feeb101 [ 38.972636] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.973271] page_type: 0xffffffff() [ 38.973715] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.974621] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800feeb101 [ 38.975531] page dumped because: kasan: bad access detected [ 38.976182] [ 38.976398] Memory state around the buggy address: [ 38.976978] ffff888016455c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.977826] ffff888016455c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.978682] >ffff888016455d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.979532] ^ [ 38.979967] ffff888016455d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.980820] ffff888016455e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.981675] ================================================================== [ 38.982618] Disabling lock debugging due to kernel taint [ 41.650931] BUG: Bad rss-counter state mm:00000000a73d4c32 type:MM_FILEPAGES val:33 [ 41.651894] BUG: Bad rss-counter state mm:00000000a73d4c32 type:MM_ANONPAGES val:22 [ 42.159377] BUG: Bad rss-counter state mm:000000000b3663e7 type:MM_FILEPAGES val:33 [ 42.160464] BUG: Bad rss-counter state mm:000000000b3663e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9602' (ECDSA) to the list of known hosts. 2023/06/20 12:25:53 fuzzer started 2023/06/20 12:25:53 dialing manager at localhost:36067 2023/06/20 12:25:53 checking machine... 2023/06/20 12:25:53 checking revisions... [ 42.961039] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:25:53 testing simple program... [ 43.017189] cgroup: Unknown subsys name 'net' [ 43.076357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:25:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f248fda0000 RCX=ffffffff844a919c RDX=ffff888019d18000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801cd41400 RSP=ffff88800fecf950 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000008 R13=dffffc0000000000 R14=0000000000000008 R15=ffff88800fecfce8 RIP=ffffffff844a919c 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 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=00007f248fdba028 CR3=000000000e052000 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=756e696c2d34365f3638782f62696c2f XMM01=00312e6f732e7a62696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138976 RDX=1ffff1100d9e135d RSI=0000000000000001 RDI=ffff88806cf09ae8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613897a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000004 R15=ffff88806cf09a98 RIP=ffffffff81131720 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 00007fccb50fa900 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=00007fccb50ae01c CR3=000000000d97a000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000